SRIWANGI III

IMO 9430739

Vessel information

Vessel Name SRIWANGI III
IMO Number 9430739
MMSI 563223700
Vessel Type Tanker
Flag 🇸🇬 Singapore
Call Sign 9V9707
Length 146 m
Beam 22 m

Detected Events (100)

Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 15:00 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 1h 5m
  • Data Points: 51 AIS positions
  • Period: 2026-04-07T15:00:41+00:00 to 2026-04-07T16:06:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 65.5,
    "points_in_zone": 51,
    "first_point": {
        "ts": "2026-04-07T15:00:41+00:00",
        "lat": 34.7053317000000021153027773834764957427978515625,
        "lon": 33.3386033000000026049747248180210590362548828125
    },
    "last_point": {
        "ts": "2026-04-07T16:06:11+00:00",
        "lat": 34.53507669999999762922016088850796222686767578125,
        "lon": 33.29251330000000308473318000324070453643798828125
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 14:40 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 1h 25m
  • Data Points: 60 AIS positions
  • Period: 2026-04-07T14:40:21+00:00 to 2026-04-07T16:06:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 85.7999999999999971578290569595992565155029296875,
    "points_in_zone": 60,
    "first_point": {
        "ts": "2026-04-07T14:40:21+00:00",
        "lat": 34.7097899999999981446308083832263946533203125,
        "lon": 33.32305000000000205773176276125013828277587890625
    },
    "last_point": {
        "ts": "2026-04-07T16:06:11+00:00",
        "lat": 34.53507669999999762922016088850796222686767578125,
        "lon": 33.29251330000000308473318000324070453643798828125
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 11:23 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 4h 43m
  • Data Points: 62 AIS positions
  • Period: 2026-04-07T11:23:12+00:00 to 2026-04-07T16:06:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 283,
    "points_in_zone": 62,
    "first_point": {
        "ts": "2026-04-07T11:23:12+00:00",
        "lat": 34.709931699999998500061337836086750030517578125,
        "lon": 33.32334329999999766869223094545304775238037109375
    },
    "last_point": {
        "ts": "2026-04-07T16:06:11+00:00",
        "lat": 34.53507669999999762922016088850796222686767578125,
        "lon": 33.29251330000000308473318000324070453643798828125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 11:23 UTC 75.0% ▼
  • Duration: 3h 26m
  • Radius: 1,079 meters
  • Data Points: 11 AIS positions
  • Centroid: 34.7086, 33.3275
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 1079,
    "duration_minutes": 206.19999999999998863131622783839702606201171875,
    "points": 11,
    "centroid": {
        "lat": 34.7085562272727230492819217033684253692626953125,
        "lon": 33.3274916636363656152752810157835483551025390625
    },
    "bbox": {
        "min_lat": 34.7053317000000021153027773834764957427978515625,
        "min_lon": 33.32300169999999894798747845925390720367431640625,
        "max_lat": 34.7097899999999981446308083832263946533203125,
        "max_lon": 33.3386033000000026049747248180210590362548828125
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 11:23 UTC 77/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 325 meters
  • Average Distance: 340 meters
  • Duration: 3h 24m
  • Period: 2026-04-07T11:23:12+00:00 to 2026-04-07T14:47:11+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 77/100

Moderate-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 325m, avg 340m) for 204 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 325m, avg 340m
Duration25/25Duration 204 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±18m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-07T16:45:04.543682+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 325.19999999999998863131622783839702606201171875,
    "avg_distance_m": 339.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 18.199999999999999289457264239899814128875732421875,
    "duration_minutes": 204,
    "overlap_duration_s": 12239,
    "speed_a_avg": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_a_std": 0.39000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.2300000000000000099920072216264088638126850128173828125,
            "max_sog": 0.8000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T11:23:12+00:00",
        "end": "2026-04-07T14:47:11+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 77,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 325m, avg 340m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 204 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b118m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 325m, avg 340m) for 204 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7089179000000029873262974433600902557373046875,
            "lon": 33.32156789999999801921148900873959064483642578125
        },
        "time_window": {
            "start_ts": "2026-04-07T11:23:12+00:00",
            "end_ts": "2026-04-07T14:47:11+00:00"
        },
        "searched_at": "2026-04-07T16:45:04.543682+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 09:52 UTC 77/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 325 meters
  • Average Distance: 340 meters
  • Duration: 4h 54m
  • Period: 2026-04-07T09:52:14+00:00 to 2026-04-07T14:47:11+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 77/100

Moderate-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 325m, avg 340m) for 295 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 325m, avg 340m
Duration25/25Duration 295 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±14m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 325.19999999999998863131622783839702606201171875,
    "avg_distance_m": 340,
    "distance_consistency_m": 14.300000000000000710542735760100185871124267578125,
    "duration_minutes": 294.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 17697,
    "speed_a_avg": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_a_std": 0.320000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1499999999999999944488848768742172978818416595458984375,
            "max_sog": 0.8000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T09:52:14+00:00",
        "end": "2026-04-07T14:47:11+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 77,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 325m, avg 340m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 295 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b114m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 325m, avg 340m) for 295 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 09:52 UTC 90/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 64 meters
  • Average Distance: 67 meters
  • Duration: 1h 31m
  • Period: 2026-04-07T09:52:14+00:00 to 2026-04-07T11:23:12+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 64m, avg 67m) for 91 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 67m
Duration20/25Duration 91 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-07T14:00:10.446065+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 63.60000000000000142108547152020037174224853515625,
    "avg_distance_m": 67.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 5.5,
    "duration_minutes": 91,
    "overlap_duration_s": 5458,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T09:52:14+00:00",
        "end": "2026-04-07T11:23:12+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 67m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 91 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 64m, avg 67m) for 91 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.71010030000000057270881370641291141510009765625,
            "lon": 33.32302030000000314657881972379982471466064453125
        },
        "time_window": {
            "start_ts": "2026-04-07T09:52:14+00:00",
            "end_ts": "2026-04-07T11:23:12+00:00"
        },
        "searched_at": "2026-04-07T14:00:10.446065+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 09:46 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 20m
  • Data Points: 65 AIS positions
  • Period: 2026-04-07T09:46:11+00:00 to 2026-04-07T16:06:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 380,
    "points_in_zone": 65,
    "first_point": {
        "ts": "2026-04-07T09:46:11+00:00",
        "lat": 34.7097116999999997233317117206752300262451171875,
        "lon": 33.3229266999999964582457323558628559112548828125
    },
    "last_point": {
        "ts": "2026-04-07T16:06:11+00:00",
        "lat": 34.53507669999999762922016088850796222686767578125,
        "lon": 33.29251330000000308473318000324070453643798828125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 09:46 UTC 75.0% ▼
  • Duration: 5h 13m
  • Radius: 1,000 meters
  • Data Points: 14 AIS positions
  • Centroid: 34.7091, 33.3254
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 999.700000000000045474735088646411895751953125,
    "duration_minutes": 313.5,
    "points": 14,
    "centroid": {
        "lat": 34.7091465571428585690227919258177280426025390625,
        "lon": 33.32544774285714339612241019494831562042236328125
    },
    "bbox": {
        "min_lat": 34.7062267000000019834260456264019012451171875,
        "min_lon": 33.3229266999999964582457323558628559112548828125,
        "max_lat": 34.709931699999998500061337836086750030517578125,
        "max_lon": 33.33577170000000222671587835066020488739013671875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 07:24 UTC 95/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 54 meters
  • Average Distance: 64 meters
  • Duration: 3h 58m
  • Period: 2026-04-07T07:24:15+00:00 to 2026-04-07T11:23:12+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 54m, avg 64m) for 239 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 54m, avg 64m
Duration25/25Duration 239 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±8m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-07T14:00:05.118667+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 54.2999999999999971578290569595992565155029296875,
    "avg_distance_m": 64.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 7.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 238.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 14337,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T07:24:15+00:00",
        "end": "2026-04-07T11:23:12+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 54m, avg 64m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 239 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b18m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 54m, avg 64m) for 239 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.710074800000001005173544399440288543701171875,
            "lon": 33.32297859999999900537659414112567901611328125
        },
        "time_window": {
            "start_ts": "2026-04-07T07:24:15+00:00",
            "end_ts": "2026-04-07T11:23:12+00:00"
        },
        "searched_at": "2026-04-07T14:00:05.118667+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 07:12 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 4h 22m
  • Data Points: 7 AIS positions
  • Period: 2026-04-07T07:12:14+00:00 to 2026-04-07T11:34:28+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 262.19999999999998863131622783839702606201171875,
    "points_in_zone": 7,
    "first_point": {
        "ts": "2026-04-07T07:12:14+00:00",
        "lat": 34.70978000000000207592165679670870304107666015625,
        "lon": 33.3230367000000029520379030145704746246337890625
    },
    "last_point": {
        "ts": "2026-04-07T11:34:28+00:00",
        "lat": 34.70963330000000013342287275008857250213623046875,
        "lon": 33.32302829999999715937519795261323451995849609375
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 06:03 UTC 95/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 54 meters
  • Average Distance: 67 meters
  • Duration: 3h 52m
  • Period: 2026-04-07T06:03:07+00:00 to 2026-04-07T09:55:46+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 54m, avg 66m) for 233 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 54m, avg 66m
Duration25/25Duration 233 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±12m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-07T11:30:01.848605+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 54.2999999999999971578290569595992565155029296875,
    "avg_distance_m": 66.5,
    "distance_consistency_m": 12,
    "duration_minutes": 232.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 13959,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T06:03:07+00:00",
        "end": "2026-04-07T09:55:46+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 54m, avg 66m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 233 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b112m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 54m, avg 66m) for 233 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7100659999999976434992277063429355621337890625,
            "lon": 33.32296149999999812507667229510843753814697265625
        },
        "time_window": {
            "start_ts": "2026-04-07T06:03:07+00:00",
            "end_ts": "2026-04-07T09:55:46+00:00"
        },
        "searched_at": "2026-04-07T11:30:01.848605+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 06:03 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 5h 31m
  • Data Points: 8 AIS positions
  • Period: 2026-04-07T06:03:07+00:00 to 2026-04-07T11:34:28+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 331.3999999999999772626324556767940521240234375,
    "points_in_zone": 8,
    "first_point": {
        "ts": "2026-04-07T06:03:07+00:00",
        "lat": 34.709751699999998209023033268749713897705078125,
        "lon": 33.32308499999999895635482971556484699249267578125
    },
    "last_point": {
        "ts": "2026-04-07T11:34:28+00:00",
        "lat": 34.70963330000000013342287275008857250213623046875,
        "lon": 33.32302829999999715937519795261323451995849609375
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 04:48 UTC 95/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 54 meters
  • Average Distance: 65 meters
  • Duration: 5h 7m
  • Period: 2026-04-07T04:48:14+00:00 to 2026-04-07T09:55:46+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 54m, avg 65m) for 308 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 54m, avg 65m
Duration25/25Duration 308 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±11m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-07T11:15:01.918744+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 54.2999999999999971578290569595992565155029296875,
    "avg_distance_m": 64.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 11.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 307.5,
    "overlap_duration_s": 18452,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T04:48:14+00:00",
        "end": "2026-04-07T09:55:46+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 54m, avg 65m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 308 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b111m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 54m, avg 65m) for 308 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.710053799999997181657818146049976348876953125,
            "lon": 33.32295309999999943784132483415305614471435546875
        },
        "time_window": {
            "start_ts": "2026-04-07T04:48:14+00:00",
            "end_ts": "2026-04-07T09:55:46+00:00"
        },
        "searched_at": "2026-04-07T11:15:01.918744+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 04:27 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 5h 28m
  • Data Points: 9 AIS positions
  • Period: 2026-04-07T04:27:09+00:00 to 2026-04-07T09:55:46+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 328.6000000000000227373675443232059478759765625,
    "points_in_zone": 9,
    "first_point": {
        "ts": "2026-04-07T04:27:09+00:00",
        "lat": 34.70976999999999890178514760918915271759033203125,
        "lon": 33.32305000000000205773176276125013828277587890625
    },
    "last_point": {
        "ts": "2026-04-07T09:55:46+00:00",
        "lat": 34.70976830000000035170160117559134960174560546875,
        "lon": 33.32308669999999750643837614916265010833740234375
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 04:19 UTC 80/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 331 meters
  • Average Distance: 336 meters
  • Duration: 5h 7m
  • Period: 2026-04-07T04:48:14+00:00 to 2026-04-07T09:55:46+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 336m) for 308 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 330m, avg 336m
Duration25/25Duration 308 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 330.5,
    "avg_distance_m": 336.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 4.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 307.5,
    "overlap_duration_s": 18452,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T04:48:14+00:00",
        "end": "2026-04-07T09:55:46+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 330m, avg 336m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 308 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 336m) for 308 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 03:42 UTC 75.0% ▼
  • Duration: 6h 13m
  • Radius: 12 meters
  • Data Points: 10 AIS positions
  • Centroid: 34.7098, 33.3230
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 11.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 373.6000000000000227373675443232059478759765625,
    "points": 10,
    "centroid": {
        "lat": 34.70977167000000207508492167107760906219482421875,
        "lon": 33.3230350099999981239307089708745479583740234375
    },
    "bbox": {
        "min_lat": 34.7097116999999997233317117206752300262451171875,
        "min_lon": 33.3229266999999964582457323558628559112548828125,
        "max_lat": 34.70985329999999891015249886550009250640869140625,
        "max_lon": 33.3231066999999967492840369231998920440673828125
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 03:12 UTC 95/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 54 meters
  • Average Distance: 63 meters
  • Duration: 6h 13m
  • Period: 2026-04-07T03:42:08+00:00 to 2026-04-07T09:55:46+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 54m, avg 63m) for 374 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 54m, avg 63m
Duration25/25Duration 374 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±10m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 54.2999999999999971578290569595992565155029296875,
    "avg_distance_m": 63,
    "distance_consistency_m": 9.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 373.6000000000000227373675443232059478759765625,
    "overlap_duration_s": 22418,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T03:42:08+00:00",
        "end": "2026-04-07T09:55:46+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 54m, avg 63m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 374 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 54m, avg 63m) for 374 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 03:12 UTC 80/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 331 meters
  • Average Distance: 335 meters
  • Duration: 6h 13m
  • Period: 2026-04-07T03:42:08+00:00 to 2026-04-07T09:55:46+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 335m) for 374 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 330m, avg 335m
Duration25/25Duration 374 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 330.5,
    "avg_distance_m": 335.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 4,
    "duration_minutes": 373.6000000000000227373675443232059478759765625,
    "overlap_duration_s": 22418,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T03:42:08+00:00",
        "end": "2026-04-07T09:55:46+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 330m, avg 335m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 374 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 335m) for 374 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 03:00 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 13m
  • Data Points: 10 AIS positions
  • Period: 2026-04-07T03:42:08+00:00 to 2026-04-07T09:55:46+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 373.6000000000000227373675443232059478759765625,
    "points_in_zone": 10,
    "first_point": {
        "ts": "2026-04-07T03:42:08+00:00",
        "lat": 34.7098016999999998688508640043437480926513671875,
        "lon": 33.32299830000000184782038559205830097198486328125
    },
    "last_point": {
        "ts": "2026-04-07T09:55:46+00:00",
        "lat": 34.70976830000000035170160117559134960174560546875,
        "lon": 33.32308669999999750643837614916265010833740234375
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 02:08 UTC 95/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 52 meters
  • Average Distance: 62 meters
  • Duration: 5h 15m
  • Period: 2026-04-07T02:08:30+00:00 to 2026-04-07T07:24:15+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 52m, avg 62m) for 316 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 52m, avg 62m
Duration25/25Duration 316 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±13m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 52.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 62.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 12.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 315.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 18945,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-07T02:08:30+00:00",
        "end": "2026-04-07T07:24:15+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 52m, avg 62m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 316 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b113m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 52m, avg 62m) for 316 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 02:08 UTC 85/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 270 meters
  • Average Distance: 330 meters
  • Duration: 5h 15m
  • Period: 2026-04-07T02:08:30+00:00 to 2026-04-07T07:24:15+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 330m) for 316 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 270m, avg 330m
Duration25/25Duration 316 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±16m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-07T08:30:04.593943+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 270,
    "avg_distance_m": 329.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 16.10000000000000142108547152020037174224853515625,
    "duration_minutes": 315.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 18945,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T02:08:30+00:00",
        "end": "2026-04-07T07:24:15+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 270m, avg 330m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 316 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b116m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 330m) for 316 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70895159999999890487742959521710872650146484375,
            "lon": 33.3214808000000033416654332540929317474365234375
        },
        "time_window": {
            "start_ts": "2026-04-07T02:08:30+00:00",
            "end_ts": "2026-04-07T07:24:15+00:00"
        },
        "searched_at": "2026-04-07T08:30:04.593943+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 02:06 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 5h 17m
  • Data Points: 18 AIS positions
  • Period: 2026-04-07T02:06:24+00:00 to 2026-04-07T07:24:15+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 317.8999999999999772626324556767940521240234375,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-04-07T02:06:24+00:00",
        "lat": 34.71048170000000254731276072561740875244140625,
        "lon": 33.3245399999999989404386724345386028289794921875
    },
    "last_point": {
        "ts": "2026-04-07T07:24:15+00:00",
        "lat": 34.70978000000000207592165679670870304107666015625,
        "lon": 33.3229867000000012922100722789764404296875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 02:06 UTC 75.0% ▼
  • Duration: 5h 17m
  • Radius: 153 meters
  • Data Points: 18 AIS positions
  • Centroid: 34.7098, 33.3231
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 153,
    "duration_minutes": 317.8999999999999772626324556767940521240234375,
    "points": 18,
    "centroid": {
        "lat": 34.70979732222222224891083897091448307037353515625,
        "lon": 33.3230904666666702951260958798229694366455078125
    },
    "bbox": {
        "min_lat": 34.70929670000000299978637485764920711517333984375,
        "min_lon": 33.322581700000000637373887002468109130859375,
        "max_lat": 34.71048170000000254731276072561740875244140625,
        "max_lon": 33.3245399999999989404386724345386028289794921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 01:15 UTC 95/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 52 meters
  • Average Distance: 63 meters
  • Duration: 5h 56m
  • Period: 2026-04-07T01:15:34+00:00 to 2026-04-07T07:12:14+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 52m, avg 62m) for 357 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 52m, avg 62m
Duration25/25Duration 357 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±12m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-07T07:45:01.693428+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 52.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 62.5,
    "distance_consistency_m": 11.800000000000000710542735760100185871124267578125,
    "duration_minutes": 356.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 21400,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-07T01:15:34+00:00",
        "end": "2026-04-07T07:12:14+00:00"
    },
    "points_count": {
        "vessel_a": 18,
        "vessel_b": 18
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 52m, avg 62m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 357 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b112m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 52m, avg 62m) for 357 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.71000140000000300233296002261340618133544921875,
            "lon": 33.32288170000000349091351381503045558929443359375
        },
        "time_window": {
            "start_ts": "2026-04-07T01:15:34+00:00",
            "end_ts": "2026-04-07T07:12:14+00:00"
        },
        "searched_at": "2026-04-07T07:45:01.693428+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 01:15 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 8m
  • Data Points: 21 AIS positions
  • Period: 2026-04-07T01:15:34+00:00 to 2026-04-07T07:24:15+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 368.69999999999998863131622783839702606201171875,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-04-07T01:15:34+00:00",
        "lat": 34.70976170000000138315954245626926422119140625,
        "lon": 33.323031700000001364969648420810699462890625
    },
    "last_point": {
        "ts": "2026-04-07T07:24:15+00:00",
        "lat": 34.70978000000000207592165679670870304107666015625,
        "lon": 33.3229867000000012922100722789764404296875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 01:15 UTC 75.0% ▼
  • Duration: 6h 8m
  • Radius: 153 meters
  • Data Points: 21 AIS positions
  • Centroid: 34.7098, 33.3231
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 153.400000000000005684341886080801486968994140625,
    "duration_minutes": 368.69999999999998863131622783839702606201171875,
    "points": 21,
    "centroid": {
        "lat": 34.70979373809524304306250996887683868408203125,
        "lon": 33.3230873047618985083317966200411319732666015625
    },
    "bbox": {
        "min_lat": 34.70929670000000299978637485764920711517333984375,
        "min_lon": 33.322581700000000637373887002468109130859375,
        "max_lat": 34.71048170000000254731276072561740875244140625,
        "max_lon": 33.3245399999999989404386724345386028289794921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 01:15 UTC 85/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 270 meters
  • Average Distance: 331 meters
  • Duration: 6h 8m
  • Period: 2026-04-07T01:15:34+00:00 to 2026-04-07T07:24:15+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 331m) for 369 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 270m, avg 331m
Duration25/25Duration 369 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±15m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-07T07:45:04.085621+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 270,
    "avg_distance_m": 330.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 15,
    "duration_minutes": 368.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 22121,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T01:15:34+00:00",
        "end": "2026-04-07T07:24:15+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 270m, avg 331m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 369 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b115m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 331m) for 369 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.708953100000002223168849013745784759521484375,
            "lon": 33.3214856999999966546965879388153553009033203125
        },
        "time_window": {
            "start_ts": "2026-04-07T01:15:34+00:00",
            "end_ts": "2026-04-07T07:24:15+00:00"
        },
        "searched_at": "2026-04-07T07:45:04.085621+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 00:02 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 152 meters
  • Data Points: 21 AIS positions
  • Centroid: 34.7098, 33.3231
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 152.099999999999994315658113919198513031005859375,
    "duration_minutes": 390.69999999999998863131622783839702606201171875,
    "points": 21,
    "centroid": {
        "lat": 34.70979445238095451031767879612743854522705078125,
        "lon": 33.32310365238094362894116784445941448211669921875
    },
    "bbox": {
        "min_lat": 34.70929670000000299978637485764920711517333984375,
        "min_lon": 33.322581700000000637373887002468109130859375,
        "max_lat": 34.71048170000000254731276072561740875244140625,
        "max_lon": 33.3245399999999989404386724345386028289794921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 00:02 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 30m
  • Data Points: 21 AIS positions
  • Period: 2026-04-07T00:41:34+00:00 to 2026-04-07T07:12:14+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 390.69999999999998863131622783839702606201171875,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-04-07T00:41:34+00:00",
        "lat": 34.7097949999999997316990629769861698150634765625,
        "lon": 33.32332999999999856299837119877338409423828125
    },
    "last_point": {
        "ts": "2026-04-07T07:12:14+00:00",
        "lat": 34.70978000000000207592165679670870304107666015625,
        "lon": 33.3230367000000029520379030145704746246337890625
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 00:02 UTC 92/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 52 meters
  • Average Distance: 67 meters
  • Duration: 6 hours
  • Period: 2026-04-07T00:02:15+00:00 to 2026-04-07T06:03:07+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 92/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 52m, avg 67m) for 361 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 52m, avg 67m
Duration25/25Duration 361 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±20m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-07T06:30:02.207075+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 52.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 66.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 19.89999999999999857891452847979962825775146484375,
    "duration_minutes": 360.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 21652,
    "speed_a_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.429999999999999993338661852249060757458209991455078125,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 2
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-04-07T00:02:15+00:00",
        "end": "2026-04-07T06:03:07+00:00"
    },
    "points_count": {
        "vessel_a": 22,
        "vessel_b": 22
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 92,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 52m, avg 67m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 361 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b120m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 52m, avg 67m) for 361 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7100118999999978086634655483067035675048828125,
            "lon": 33.3229242999999968333213473670184612274169921875
        },
        "time_window": {
            "start_ts": "2026-04-07T00:02:15+00:00",
            "end_ts": "2026-04-07T06:03:07+00:00"
        },
        "searched_at": "2026-04-07T06:30:02.207075+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 7, 2026 00:02 UTC 85/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 270 meters
  • Average Distance: 333 meters
  • Duration: 6h 30m
  • Period: 2026-04-07T00:41:34+00:00 to 2026-04-07T07:12:14+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 332m) for 391 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 270m, avg 332m
Duration25/25Duration 391 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±16m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 270,
    "avg_distance_m": 332.5,
    "distance_consistency_m": 16.39999999999999857891452847979962825775146484375,
    "duration_minutes": 390.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 23440,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T00:41:34+00:00",
        "end": "2026-04-07T07:12:14+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 270m, avg 332m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 391 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b116m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 332m) for 391 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 23:08 UTC 92/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 51 meters
  • Average Distance: 66 meters
  • Duration: 5h 15m
  • Period: 2026-04-06T23:32:47+00:00 to 2026-04-07T04:48:14+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 92/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 51m, avg 66m) for 315 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 51m, avg 66m
Duration25/25Duration 315 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±20m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 51.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 66,
    "distance_consistency_m": 20.10000000000000142108547152020037174224853515625,
    "duration_minutes": 315.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 18927,
    "speed_a_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.429999999999999993338661852249060757458209991455078125,
    "speed_b_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 2
        },
        "vessel_b": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-04-06T23:32:47+00:00",
        "end": "2026-04-07T04:48:14+00:00"
    },
    "points_count": {
        "vessel_a": 22,
        "vessel_b": 22
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 92,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 51m, avg 66m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 315 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b120m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 51m, avg 66m) for 315 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 23:08 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 30m
  • Data Points: 27 AIS positions
  • Period: 2026-04-06T23:32:47+00:00 to 2026-04-07T06:03:07+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 390.30000000000001136868377216160297393798828125,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-04-06T23:32:47+00:00",
        "lat": 34.70987670000000235859261010773479938507080078125,
        "lon": 33.32302829999999715937519795261323451995849609375
    },
    "last_point": {
        "ts": "2026-04-07T06:03:07+00:00",
        "lat": 34.709751699999998209023033268749713897705078125,
        "lon": 33.32308499999999895635482971556484699249267578125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 23:08 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 146 meters
  • Data Points: 27 AIS positions
  • Centroid: 34.7099, 33.3231
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 145.5,
    "duration_minutes": 390.30000000000001136868377216160297393798828125,
    "points": 27,
    "centroid": {
        "lat": 34.70985451481481476321278023533523082733154296875,
        "lon": 33.32314462592592718692685593850910663604736328125
    },
    "bbox": {
        "min_lat": 34.70929670000000299978637485764920711517333984375,
        "min_lon": 33.322581700000000637373887002468109130859375,
        "max_lat": 34.7109717000000017605998436920344829559326171875,
        "max_lon": 33.3245399999999989404386724345386028289794921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 23:08 UTC 82/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 270 meters
  • Average Distance: 339 meters
  • Duration: 6h 30m
  • Period: 2026-04-06T23:32:47+00:00 to 2026-04-07T06:03:07+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 82/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 339m) for 390 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 270m, avg 339m
Duration25/25Duration 390 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±29m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 270,
    "avg_distance_m": 338.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 29.39999999999999857891452847979962825775146484375,
    "duration_minutes": 390.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 23420,
    "speed_a_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.419999999999999984456877655247808434069156646728515625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 2
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T23:32:47+00:00",
        "end": "2026-04-07T06:03:07+00:00"
    },
    "points_count": {
        "vessel_a": 23,
        "vessel_b": 23
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 82,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 270m, avg 339m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 390 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b129m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 339m) for 390 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 22:11 UTC 92/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 50 meters
  • Average Distance: 64 meters
  • Duration: 6h 18m
  • Period: 2026-04-06T22:11:46+00:00 to 2026-04-07T04:30:09+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 92/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 50m, avg 64m) for 378 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 50m, avg 64m
Duration25/25Duration 378 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±19m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 49.7000000000000028421709430404007434844970703125,
    "avg_distance_m": 64.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 18.89999999999999857891452847979962825775146484375,
    "duration_minutes": 378.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 22703,
    "speed_a_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_a_std": 0.39000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 2
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-04-06T22:11:46+00:00",
        "end": "2026-04-07T04:30:09+00:00"
    },
    "points_count": {
        "vessel_a": 26,
        "vessel_b": 26
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 92,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 50m, avg 64m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 378 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b119m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 50m, avg 64m) for 378 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 22:11 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 36m
  • Data Points: 31 AIS positions
  • Period: 2026-04-06T22:11:46+00:00 to 2026-04-07T04:48:14+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396.5,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-04-06T22:11:46+00:00",
        "lat": 34.70978670000000221307345782406628131866455078125,
        "lon": 33.3229682999999994308382156305015087127685546875
    },
    "last_point": {
        "ts": "2026-04-07T04:48:14+00:00",
        "lat": 34.70975829999999717756509198807179927825927734375,
        "lon": 33.32303830000000033351170714013278484344482421875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 22:11 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 148 meters
  • Data Points: 31 AIS positions
  • Centroid: 34.7098, 33.3231
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 147.5,
    "duration_minutes": 396.5,
    "points": 31,
    "centroid": {
        "lat": 34.70984888064517548400544910691678524017333984375,
        "lon": 33.32312408387095814532585791312158107757568359375
    },
    "bbox": {
        "min_lat": 34.70929670000000299978637485764920711517333984375,
        "min_lon": 33.322581700000000637373887002468109130859375,
        "max_lat": 34.7109717000000017605998436920344829559326171875,
        "max_lon": 33.3245399999999989404386724345386028289794921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 22:11 UTC 82/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 270 meters
  • Average Distance: 338 meters
  • Duration: 6h 21m
  • Period: 2026-04-06T22:26:44+00:00 to 2026-04-07T04:48:14+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 82/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 338m) for 382 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 270m, avg 338m
Duration25/25Duration 382 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±28m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 270,
    "avg_distance_m": 338,
    "distance_consistency_m": 27.699999999999999289457264239899814128875732421875,
    "duration_minutes": 381.5,
    "overlap_duration_s": 22890,
    "speed_a_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_a_std": 0.39000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 2
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T22:26:44+00:00",
        "end": "2026-04-07T04:48:14+00:00"
    },
    "points_count": {
        "vessel_a": 26,
        "vessel_b": 26
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 82,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 270m, avg 338m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 382 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b128m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 338m) for 382 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 21:02 UTC 92/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 50 meters
  • Average Distance: 64 meters
  • Duration: 6h 15m
  • Period: 2026-04-06T21:26:47+00:00 to 2026-04-07T03:42:08+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 92/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 50m, avg 64m) for 375 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 50m, avg 64m
Duration25/25Duration 375 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±19m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 49.7000000000000028421709430404007434844970703125,
    "avg_distance_m": 64.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 19.300000000000000710542735760100185871124267578125,
    "duration_minutes": 375.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 22521,
    "speed_a_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_a_std": 0.40000000000000002220446049250313080847263336181640625,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 2
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-04-06T21:26:47+00:00",
        "end": "2026-04-07T03:42:08+00:00"
    },
    "points_count": {
        "vessel_a": 25,
        "vessel_b": 25
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 92,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 50m, avg 64m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 375 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b119m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 50m, avg 64m) for 375 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 21:02 UTC 82/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 270 meters
  • Average Distance: 338 meters
  • Duration: 6h 15m
  • Period: 2026-04-06T21:26:47+00:00 to 2026-04-07T03:42:08+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 82/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 338m) for 375 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 270m, avg 338m
Duration25/25Duration 375 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±28m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 270,
    "avg_distance_m": 338.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 28.300000000000000710542735760100185871124267578125,
    "duration_minutes": 375.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 22521,
    "speed_a_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_a_std": 0.40000000000000002220446049250313080847263336181640625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 2
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T21:26:47+00:00",
        "end": "2026-04-07T03:42:08+00:00"
    },
    "points_count": {
        "vessel_a": 25,
        "vessel_b": 25
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 82,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 270m, avg 338m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 375 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b128m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 338m) for 375 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 21:02 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 15m
  • Data Points: 29 AIS positions
  • Period: 2026-04-06T21:26:47+00:00 to 2026-04-07T03:42:08+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 375.3999999999999772626324556767940521240234375,
    "points_in_zone": 29,
    "first_point": {
        "ts": "2026-04-06T21:26:47+00:00",
        "lat": 34.7097600000000028330759960226714611053466796875,
        "lon": 33.32304330000000192057996173389256000518798828125
    },
    "last_point": {
        "ts": "2026-04-07T03:42:08+00:00",
        "lat": 34.7098016999999998688508640043437480926513671875,
        "lon": 33.32299830000000184782038559205830097198486328125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 21:02 UTC 75.0% ▼
  • Duration: 6h 15m
  • Radius: 147 meters
  • Data Points: 29 AIS positions
  • Centroid: 34.7099, 33.3231
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 146.69999999999998863131622783839702606201171875,
    "duration_minutes": 375.3999999999999772626324556767940521240234375,
    "points": 29,
    "centroid": {
        "lat": 34.7098553551724222643315442837774753570556640625,
        "lon": 33.3231298827586215338669717311859130859375
    },
    "bbox": {
        "min_lat": 34.70929670000000299978637485764920711517333984375,
        "min_lon": 33.322581700000000637373887002468109130859375,
        "max_lat": 34.7109717000000017605998436920344829559326171875,
        "max_lon": 33.3245399999999989404386724345386028289794921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 18:08 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 27m
  • Data Points: 17 AIS positions
  • Period: 2026-04-06T18:13:38+00:00 to 2026-04-07T00:41:34+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 387.8999999999999772626324556767940521240234375,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-04-06T18:13:38+00:00",
        "lat": 34.71026330000000115205693873576819896697998046875,
        "lon": 33.32362330000000127938619698397815227508544921875
    },
    "last_point": {
        "ts": "2026-04-07T00:41:34+00:00",
        "lat": 34.7097949999999997316990629769861698150634765625,
        "lon": 33.32332999999999856299837119877338409423828125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 18:08 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 117 meters
  • Data Points: 17 AIS positions
  • Centroid: 34.7099, 33.3232
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 117.400000000000005684341886080801486968994140625,
    "duration_minutes": 387.8999999999999772626324556767940521240234375,
    "points": 17,
    "centroid": {
        "lat": 34.7099134411764680407941341400146484375,
        "lon": 33.3231689176470666780005558393895626068115234375
    },
    "bbox": {
        "min_lat": 34.70973670000000055324562708847224712371826171875,
        "min_lon": 33.3229682999999994308382156305015087127685546875,
        "max_lat": 34.7109717000000017605998436920344829559326171875,
        "max_lon": 33.32420499999999918827597866766154766082763671875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 17:01 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 30m
  • Data Points: 18 AIS positions
  • Period: 2026-04-06T17:51:27+00:00 to 2026-04-07T00:22:06+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 390.6000000000000227373675443232059478759765625,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-04-06T17:51:27+00:00",
        "lat": 34.7098799999999982901499606668949127197265625,
        "lon": 33.32315330000000130894477479159832000732421875
    },
    "last_point": {
        "ts": "2026-04-07T00:22:06+00:00",
        "lat": 34.70978670000000221307345782406628131866455078125,
        "lon": 33.32307829999999881920302868820726871490478515625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 17:01 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 107 meters
  • Data Points: 18 AIS positions
  • Centroid: 34.7099, 33.3232
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 107.400000000000005684341886080801486968994140625,
    "duration_minutes": 390.6000000000000227373675443232059478759765625,
    "points": 18,
    "centroid": {
        "lat": 34.70985741111110911560899694450199604034423828125,
        "lon": 33.3231565722222313752354239113628864288330078125
    },
    "bbox": {
        "min_lat": 34.70973670000000055324562708847224712371826171875,
        "min_lon": 33.3229682999999994308382156305015087127685546875,
        "max_lat": 34.7102900000000005320544005371630191802978515625,
        "max_lon": 33.32420499999999918827597866766154766082763671875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 17:01 UTC 71/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 330 meters
  • Average Distance: 344 meters
  • Duration: 6h 28m
  • Period: 2026-04-06T17:53:29+00:00 to 2026-04-07T00:22:06+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 71/100

Moderate-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 344m) for 389 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 330m, avg 344m
Duration25/25Duration 389 minutes
Speed Stability14/20both nearly stationary; somewhat variable speeds
Distance Consistency12/15Distance variance ±32m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 329.5,
    "avg_distance_m": 343.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 32.2000000000000028421709430404007434844970703125,
    "duration_minutes": 388.6000000000000227373675443232059478759765625,
    "overlap_duration_s": 23317,
    "speed_a_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_a_std": 0.5300000000000000266453525910037569701671600341796875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 2
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T17:53:29+00:00",
        "end": "2026-04-07T00:22:06+00:00"
    },
    "points_count": {
        "vessel_a": 14,
        "vessel_b": 14
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 71,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 330m, avg 344m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 389 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 12,
                "max": 15,
                "detail": "Distance variance \u00b132m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 344m) for 389 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 16:34 UTC 75/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 54 meters
  • Average Distance: 59 meters
  • Duration: 42 minutes
  • Period: 2026-04-06T16:34:29+00:00 to 2026-04-06T17:17:09+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 54m, avg 59m) for 43 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 54m, avg 59m
Duration5/25Duration 43 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-06T17:30:10.717422+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 54.39999999999999857891452847979962825775146484375,
    "avg_distance_m": 59,
    "distance_consistency_m": 3.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 42.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 2560,
    "speed_a_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_a_std": 0.14000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-06T16:34:29+00:00",
        "end": "2026-04-06T17:17:09+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 54m, avg 59m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 43 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 54m, avg 59m) for 43 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7100487000000015314071788452565670013427734375,
            "lon": 33.32289800000000212776285479776561260223388671875
        },
        "time_window": {
            "start_ts": "2026-04-06T16:34:29+00:00",
            "end_ts": "2026-04-06T17:17:09+00:00"
        },
        "searched_at": "2026-04-06T17:30:10.717422+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 16:07 UTC 80/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 330 meters
  • Average Distance: 336 meters
  • Duration: 6h 22m
  • Period: 2026-04-06T16:58:37+00:00 to 2026-04-06T23:20:47+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 336m) for 382 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 330m, avg 336m
Duration25/25Duration 382 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±11m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 329.5,
    "avg_distance_m": 336.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 10.699999999999999289457264239899814128875732421875,
    "duration_minutes": 382.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 22930,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T16:58:37+00:00",
        "end": "2026-04-06T23:20:47+00:00"
    },
    "points_count": {
        "vessel_a": 15,
        "vessel_b": 15
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 330m, avg 336m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 382 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b111m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 336m) for 382 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 16:07 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 27m
  • Data Points: 22 AIS positions
  • Period: 2026-04-06T16:53:36+00:00 to 2026-04-06T23:20:47+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 387.19999999999998863131622783839702606201171875,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-04-06T16:53:36+00:00",
        "lat": 34.70980829999999883739292272366583347320556640625,
        "lon": 33.32300330000000343488864018581807613372802734375
    },
    "last_point": {
        "ts": "2026-04-06T23:20:47+00:00",
        "lat": 34.70978000000000207592165679670870304107666015625,
        "lon": 33.32301170000000212212398764677345752716064453125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 16:07 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 73 meters
  • Data Points: 22 AIS positions
  • Centroid: 34.7099, 33.3231
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 72.7000000000000028421709430404007434844970703125,
    "duration_minutes": 387.19999999999998863131622783839702606201171875,
    "points": 22,
    "centroid": {
        "lat": 34.709859540909093311711330898106098175048828125,
        "lon": 33.3231007590909058535544318147003650665283203125
    },
    "bbox": {
        "min_lat": 34.70960170000000033496689866296947002410888671875,
        "min_lon": 33.32286330000000162954165716655552387237548828125,
        "max_lat": 34.71039830000000137033566716127097606658935546875,
        "max_lon": 33.32362330000000127938619698397815227508544921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 15:07 UTC 85/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 51 meters
  • Average Distance: 61 meters
  • Duration: 1 hours
  • Period: 2026-04-06T15:07:28+00:00 to 2026-04-06T16:07:27+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 51m, avg 61m) for 60 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 51m, avg 61m
Duration15/25Duration 60 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-06T21:15:01.688788+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 51.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 61.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 5.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 60,
    "overlap_duration_s": 3599,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-06T15:07:28+00:00",
        "end": "2026-04-06T16:07:27+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 51m, avg 61m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 60 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 51m, avg 61m) for 60 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.710062899999996943734004162251949310302734375,
            "lon": 33.322881399999999985084286890923976898193359375
        },
        "time_window": {
            "start_ts": "2026-04-06T15:07:28+00:00",
            "end_ts": "2026-04-06T16:07:27+00:00"
        },
        "searched_at": "2026-04-06T21:15:01.688788+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 15:07 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 34m
  • Data Points: 27 AIS positions
  • Period: 2026-04-06T15:52:28+00:00 to 2026-04-06T22:26:44+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 394.30000000000001136868377216160297393798828125,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-04-06T15:52:28+00:00",
        "lat": 34.7098016999999998688508640043437480926513671875,
        "lon": 33.323008299999997916529537178575992584228515625
    },
    "last_point": {
        "ts": "2026-04-06T22:26:44+00:00",
        "lat": 34.7097949999999997316990629769861698150634765625,
        "lon": 33.3229850000000027421265258453786373138427734375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 15:07 UTC 75.0% ▼
  • Duration: 6h 34m
  • Radius: 76 meters
  • Data Points: 27 AIS positions
  • Centroid: 34.7098, 33.3231
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 76,
    "duration_minutes": 394.30000000000001136868377216160297393798828125,
    "points": 27,
    "centroid": {
        "lat": 34.70984042222222143436738406307995319366455078125,
        "lon": 33.323071725925927921707625500857830047607421875
    },
    "bbox": {
        "min_lat": 34.7095182999999991579898050986230373382568359375,
        "min_lon": 33.32265170000000154004737851209938526153564453125,
        "max_lat": 34.71039830000000137033566716127097606658935546875,
        "max_lon": 33.32362330000000127938619698397815227508544921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 15:07 UTC 80/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 330 meters
  • Average Distance: 337 meters
  • Duration: 6h 25m
  • Period: 2026-04-06T15:46:28+00:00 to 2026-04-06T22:11:46+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 337m) for 385 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 330m, avg 337m
Duration25/25Duration 385 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 329.5,
    "avg_distance_m": 336.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 9.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 385.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 23118,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T15:46:28+00:00",
        "end": "2026-04-06T22:11:46+00:00"
    },
    "points_count": {
        "vessel_a": 20,
        "vessel_b": 20
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 330m, avg 337m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 385 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 337m) for 385 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 14:07 UTC 95/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 47 meters
  • Average Distance: 60 meters
  • Duration: 2 hours
  • Period: 2026-04-06T14:07:28+00:00 to 2026-04-06T16:07:27+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 47m, avg 60m) for 120 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 47m, avg 60m
Duration25/25Duration 120 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 47.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 59.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 6.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 120,
    "overlap_duration_s": 7199,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-06T14:07:28+00:00",
        "end": "2026-04-06T16:07:27+00:00"
    },
    "points_count": {
        "vessel_a": 15,
        "vessel_b": 15
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 47m, avg 60m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 120 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 47m, avg 60m) for 120 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 14:07 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 4h 6m
  • Data Points: 34 AIS positions
  • Period: 2026-04-06T14:07:28+00:00 to 2026-04-06T18:13:38+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 246.19999999999998863131622783839702606201171875,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-04-06T14:07:28+00:00",
        "lat": 34.70990669999999767014742246828973293304443359375,
        "lon": 33.32309670000000068057488533668220043182373046875
    },
    "last_point": {
        "ts": "2026-04-06T18:13:38+00:00",
        "lat": 34.71026330000000115205693873576819896697998046875,
        "lon": 33.32362330000000127938619698397815227508544921875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 14:07 UTC 75.0% ▼
  • Duration: 4h 6m
  • Radius: 75 meters
  • Data Points: 34 AIS positions
  • Centroid: 34.7098, 33.3231
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 75.400000000000005684341886080801486968994140625,
    "duration_minutes": 246.19999999999998863131622783839702606201171875,
    "points": 34,
    "centroid": {
        "lat": 34.70984680588235704590260866098105907440185546875,
        "lon": 33.323072352941181861751829273998737335205078125
    },
    "bbox": {
        "min_lat": 34.7095182999999991579898050986230373382568359375,
        "min_lon": 33.32265170000000154004737851209938526153564453125,
        "max_lat": 34.71039830000000137033566716127097606658935546875,
        "max_lon": 33.32362330000000127938619698397815227508544921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 14:07 UTC 80/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 331 meters
  • Average Distance: 338 meters
  • Duration: 3h 46m
  • Period: 2026-04-06T14:07:28+00:00 to 2026-04-06T17:53:29+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 331m, avg 338m) for 226 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 331m, avg 338m
Duration25/25Duration 226 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-06T20:45:03.981889+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 330.8999999999999772626324556767940521240234375,
    "avg_distance_m": 338.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 8.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 226,
    "overlap_duration_s": 13561,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T14:07:28+00:00",
        "end": "2026-04-06T17:53:29+00:00"
    },
    "points_count": {
        "vessel_a": 26,
        "vessel_b": 26
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 331m, avg 338m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 226 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 331m, avg 338m) for 226 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70899059999999991532604326494038105010986328125,
            "lon": 33.3215071999999992158336681313812732696533203125
        },
        "time_window": {
            "start_ts": "2026-04-06T14:07:28+00:00",
            "end_ts": "2026-04-06T17:53:29+00:00"
        },
        "searched_at": "2026-04-06T20:45:03.981889+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 13:03 UTC 80/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 331 meters
  • Average Distance: 338 meters
  • Duration: 4h 49m
  • Period: 2026-04-06T13:03:49+00:00 to 2026-04-06T17:53:29+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 331m, avg 338m) for 290 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 331m, avg 338m
Duration25/25Duration 290 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±8m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-06T19:45:01.446635+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 330.8999999999999772626324556767940521240234375,
    "avg_distance_m": 338.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 7.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 289.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 17380,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T13:03:49+00:00",
        "end": "2026-04-06T17:53:29+00:00"
    },
    "points_count": {
        "vessel_a": 33,
        "vessel_b": 33
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 331m, avg 338m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 290 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b18m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 331m, avg 338m) for 290 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70898960000000244008333538658916950225830078125,
            "lon": 33.32150949999999767214831081219017505645751953125
        },
        "time_window": {
            "start_ts": "2026-04-06T13:03:49+00:00",
            "end_ts": "2026-04-06T17:53:29+00:00"
        },
        "searched_at": "2026-04-06T19:45:01.446635+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 13:03 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 5h 9m
  • Data Points: 41 AIS positions
  • Period: 2026-04-06T13:03:49+00:00 to 2026-04-06T18:13:38+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 309.80000000000001136868377216160297393798828125,
    "points_in_zone": 41,
    "first_point": {
        "ts": "2026-04-06T13:03:49+00:00",
        "lat": 34.70976170000000138315954245626926422119140625,
        "lon": 33.32307329999999723213477409444749355316162109375
    },
    "last_point": {
        "ts": "2026-04-06T18:13:38+00:00",
        "lat": 34.71026330000000115205693873576819896697998046875,
        "lon": 33.32362330000000127938619698397815227508544921875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 13:03 UTC 75.0% ▼
  • Duration: 5h 9m
  • Radius: 76 meters
  • Data Points: 41 AIS positions
  • Centroid: 34.7098, 33.3231
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 75.900000000000005684341886080801486968994140625,
    "duration_minutes": 309.80000000000001136868377216160297393798828125,
    "points": 41,
    "centroid": {
        "lat": 34.709840768292679058504290878772735595703125,
        "lon": 33.3230721902439057657829835079610347747802734375
    },
    "bbox": {
        "min_lat": 34.7095182999999991579898050986230373382568359375,
        "min_lon": 33.32265170000000154004737851209938526153564453125,
        "max_lat": 34.71039830000000137033566716127097606658935546875,
        "max_lon": 33.32362330000000127938619698397815227508544921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 12:37 UTC 80/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 331 meters
  • Average Distance: 338 meters
  • Duration: 5h 44m
  • Period: 2026-04-06T12:08:48+00:00 to 2026-04-06T17:53:29+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 331m, avg 338m) for 345 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 331m, avg 338m
Duration25/25Duration 345 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±7m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 330.8999999999999772626324556767940521240234375,
    "avg_distance_m": 338.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 7.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 344.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 20681,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T12:08:48+00:00",
        "end": "2026-04-06T17:53:29+00:00"
    },
    "points_count": {
        "vessel_a": 38,
        "vessel_b": 38
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 331m, avg 338m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 345 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 331m, avg 338m) for 345 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 12:08 UTC 85/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 50 meters
  • Average Distance: 59 meters
  • Duration: 1h 16m
  • Period: 2026-04-06T12:08:48+00:00 to 2026-04-06T13:25:28+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 50m, avg 59m) for 77 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 50m, avg 59m
Duration15/25Duration 77 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-06T18:30:01.548779+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 50.39999999999999857891452847979962825775146484375,
    "avg_distance_m": 58.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 6.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 76.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 4600,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-06T12:08:48+00:00",
        "end": "2026-04-06T13:25:28+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 50m, avg 59m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 77 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 50m, avg 59m) for 77 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7100563999999991438016877509653568267822265625,
            "lon": 33.32293059999999940146153676323592662811279296875
        },
        "time_window": {
            "start_ts": "2026-04-06T12:08:48+00:00",
            "end_ts": "2026-04-06T13:25:28+00:00"
        },
        "searched_at": "2026-04-06T18:30:01.548779+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 12:04 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 8m
  • Data Points: 47 AIS positions
  • Period: 2026-04-06T12:04:56+00:00 to 2026-04-06T18:13:38+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 368.69999999999998863131622783839702606201171875,
    "points_in_zone": 47,
    "first_point": {
        "ts": "2026-04-06T12:04:56+00:00",
        "lat": 34.7098849999999998772182152606546878814697265625,
        "lon": 33.323111699999998336352291516959667205810546875
    },
    "last_point": {
        "ts": "2026-04-06T18:13:38+00:00",
        "lat": 34.71026330000000115205693873576819896697998046875,
        "lon": 33.32362330000000127938619698397815227508544921875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 12:04 UTC 75.0% ▼
  • Duration: 6h 8m
  • Radius: 76 meters
  • Data Points: 47 AIS positions
  • Centroid: 34.7098, 33.3231
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 75.900000000000005684341886080801486968994140625,
    "duration_minutes": 368.69999999999998863131622783839702606201171875,
    "points": 47,
    "centroid": {
        "lat": 34.70984067234042669269911129958927631378173828125,
        "lon": 33.323072800000005599940777756273746490478515625
    },
    "bbox": {
        "min_lat": 34.7095182999999991579898050986230373382568359375,
        "min_lon": 33.32265170000000154004737851209938526153564453125,
        "max_lat": 34.71039830000000137033566716127097606658935546875,
        "max_lon": 33.32362330000000127938619698397815227508544921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 11:45 UTC 90/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 50 meters
  • Average Distance: 59 meters
  • Duration: 1h 39m
  • Period: 2026-04-06T11:45:37+00:00 to 2026-04-06T13:25:28+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 50m, avg 59m) for 100 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 50m, avg 59m
Duration20/25Duration 100 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-06T17:30:01.722456+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 50.39999999999999857891452847979962825775146484375,
    "avg_distance_m": 59.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 6.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 99.7999999999999971578290569595992565155029296875,
    "overlap_duration_s": 5991,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-06T11:45:37+00:00",
        "end": "2026-04-06T13:25:28+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 50m, avg 59m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 100 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 50m, avg 59m) for 100 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.71004860000000036279743653722107410430908203125,
            "lon": 33.32291690000000272675606538541615009307861328125
        },
        "time_window": {
            "start_ts": "2026-04-06T11:45:37+00:00",
            "end_ts": "2026-04-06T13:25:28+00:00"
        },
        "searched_at": "2026-04-06T17:30:01.722456+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 11:41 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 32m
  • Data Points: 50 AIS positions
  • Period: 2026-04-06T11:41:04+00:00 to 2026-04-06T18:13:38+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 392.6000000000000227373675443232059478759765625,
    "points_in_zone": 50,
    "first_point": {
        "ts": "2026-04-06T11:41:04+00:00",
        "lat": 34.7097600000000028330759960226714611053466796875,
        "lon": 33.32299669999999736091922386549413204193115234375
    },
    "last_point": {
        "ts": "2026-04-06T18:13:38+00:00",
        "lat": 34.71026330000000115205693873576819896697998046875,
        "lon": 33.32362330000000127938619698397815227508544921875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 11:41 UTC 75.0% ▼
  • Duration: 6h 32m
  • Radius: 77 meters
  • Data Points: 50 AIS positions
  • Centroid: 34.7098, 33.3231
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 76.5,
    "duration_minutes": 392.6000000000000227373675443232059478759765625,
    "points": 50,
    "centroid": {
        "lat": 34.709838598000004594723577611148357391357421875,
        "lon": 33.32306606600000264961636275984346866607666015625
    },
    "bbox": {
        "min_lat": 34.7095182999999991579898050986230373382568359375,
        "min_lon": 33.32265170000000154004737851209938526153564453125,
        "max_lat": 34.71039830000000137033566716127097606658935546875,
        "max_lon": 33.32362330000000127938619698397815227508544921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 11:40 UTC 80/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 308 meters
  • Average Distance: 338 meters
  • Duration: 6h 7m
  • Period: 2026-04-06T11:45:37+00:00 to 2026-04-06T17:53:29+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 308m, avg 338m) for 368 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 308m, avg 338m
Duration25/25Duration 368 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 308,
    "avg_distance_m": 337.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 8.800000000000000710542735760100185871124267578125,
    "duration_minutes": 367.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 22072,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T11:45:37+00:00",
        "end": "2026-04-06T17:53:29+00:00"
    },
    "points_count": {
        "vessel_a": 39,
        "vessel_b": 39
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 308m, avg 338m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 368 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 308m, avg 338m) for 368 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 10:04 UTC 95/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 44 meters
  • Average Distance: 58 meters
  • Duration: 3h 21m
  • Period: 2026-04-06T10:04:01+00:00 to 2026-04-06T13:25:28+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 44m, avg 58m) for 201 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 44m, avg 58m
Duration25/25Duration 201 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-06T16:45:23.134387+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 43.60000000000000142108547152020037174224853515625,
    "avg_distance_m": 57.89999999999999857891452847979962825775146484375,
    "distance_consistency_m": 6.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 201.400000000000005684341886080801486968994140625,
    "overlap_duration_s": 12087,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-06T10:04:01+00:00",
        "end": "2026-04-06T13:25:28+00:00"
    },
    "points_count": {
        "vessel_a": 21,
        "vessel_b": 21
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 44m, avg 58m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 201 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 44m, avg 58m) for 201 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7100606999999996560291037894785404205322265625,
            "lon": 33.3229084999999969340933603234589099884033203125
        },
        "time_window": {
            "start_ts": "2026-04-06T10:04:01+00:00",
            "end_ts": "2026-04-06T13:25:28+00:00"
        },
        "searched_at": "2026-04-06T16:45:23.134387+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 10:04 UTC 80/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 308 meters
  • Average Distance: 338 meters
  • Duration: 6h 22m
  • Period: 2026-04-06T10:54:46+00:00 to 2026-04-06T17:17:09+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 308m, avg 338m) for 382 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 308m, avg 338m
Duration25/25Duration 382 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 308,
    "avg_distance_m": 337.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 8.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 382.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 22943,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T10:54:46+00:00",
        "end": "2026-04-06T17:17:09+00:00"
    },
    "points_count": {
        "vessel_a": 38,
        "vessel_b": 38
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 308m, avg 338m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 382 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 308m, avg 338m) for 382 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 10:00 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 34m
  • Data Points: 47 AIS positions
  • Period: 2026-04-06T10:42:54+00:00 to 2026-04-06T17:17:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 394.19999999999998863131622783839702606201171875,
    "points_in_zone": 47,
    "first_point": {
        "ts": "2026-04-06T10:42:54+00:00",
        "lat": 34.7098500000000029785951483063399791717529296875,
        "lon": 33.32306330000000116342562250792980194091796875
    },
    "last_point": {
        "ts": "2026-04-06T17:17:09+00:00",
        "lat": 34.7097499999999996589394868351519107818603515625,
        "lon": 33.32301499999999805368133820593357086181640625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 10:00 UTC 75.0% ▼
  • Duration: 6h 34m
  • Radius: 79 meters
  • Data Points: 47 AIS positions
  • Centroid: 34.7098, 33.3230
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 78.5,
    "duration_minutes": 394.19999999999998863131622783839702606201171875,
    "points": 47,
    "centroid": {
        "lat": 34.70982829999999097481122589670121669769287109375,
        "lon": 33.32304549361702328269529971294105052947998046875
    },
    "bbox": {
        "min_lat": 34.7095182999999991579898050986230373382568359375,
        "min_lon": 33.32265170000000154004737851209938526153564453125,
        "max_lat": 34.71039830000000137033566716127097606658935546875,
        "max_lon": 33.3235533000000003767127054743468761444091796875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 09:19 UTC 80/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 308 meters
  • Average Distance: 338 meters
  • Duration: 6h 21m
  • Period: 2026-04-06T09:58:01+00:00 to 2026-04-06T16:19:27+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 308m, avg 338m) for 381 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 308m, avg 338m
Duration25/25Duration 381 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 308,
    "avg_distance_m": 337.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 6.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 381.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 22886,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T09:58:01+00:00",
        "end": "2026-04-06T16:19:27+00:00"
    },
    "points_count": {
        "vessel_a": 40,
        "vessel_b": 40
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 308m, avg 338m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 381 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 308m, avg 338m) for 381 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 09:19 UTC 51/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 306 meters
  • Average Distance: 326 meters
  • Duration: 41 minutes
  • Period: 2026-04-06T09:19:56+00:00 to 2026-04-06T10:00:56+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 51/100

Low-confidence STS candidate - may warrant review. Two tankers (SRIWANGI III and FAIR STAR) maintained close proximity (min 306m, avg 326m) for 41 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 306m, avg 326m
Duration5/25Duration 41 minutes
Speed Stability14/20both nearly stationary; somewhat variable speeds
Distance Consistency12/15Distance variance ±42m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-06T10:15:04.918022+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 305.5,
    "avg_distance_m": 326.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 41.60000000000000142108547152020037174224853515625,
    "duration_minutes": 41,
    "overlap_duration_s": 2460,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.2399999999999999911182158029987476766109466552734375,
    "speed_b_std": 0.60999999999999998667732370449812151491641998291015625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.2399999999999999911182158029987476766109466552734375,
            "max_sog": 2
        }
    },
    "time_window": {
        "start": "2026-04-06T09:19:56+00:00",
        "end": "2026-04-06T10:00:56+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 51,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 306m, avg 326m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 41 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 12,
                "max": 15,
                "detail": "Distance variance \u00b142m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "Low-confidence STS candidate - may warrant review. Two tankers (SRIWANGI III and FAIR STAR) maintained close proximity (min 306m, avg 326m) for 41 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70873259999999760339051135815680027008056640625,
            "lon": 33.32185650000000265436028712429106235504150390625
        },
        "time_window": {
            "start_ts": "2026-04-06T09:19:56+00:00",
            "end_ts": "2026-04-06T10:00:56+00:00"
        },
        "searched_at": "2026-04-06T10:15:04.918022+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 09:19 UTC 95/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9517288 (ALFA SEA) Panama
  • Minimum Distance: 44 meters
  • Average Distance: 59 meters
  • Duration: 4h 5m
  • Period: 2026-04-06T09:19:56+00:00 to 2026-04-06T13:25:28+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 44m, avg 58m) for 246 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 44m, avg 58m
Duration25/25Duration 246 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "min_distance_m": 43.60000000000000142108547152020037174224853515625,
    "avg_distance_m": 58.5,
    "distance_consistency_m": 5.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 245.5,
    "overlap_duration_s": 14732,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_std": 0.1600000000000000033306690738754696212708950042724609375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.90000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-04-06T09:19:56+00:00",
        "end": "2026-04-06T13:25:28+00:00"
    },
    "points_count": {
        "vessel_a": 32,
        "vessel_b": 32
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 44m, avg 58m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 246 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and ALFA SEA) maintained close proximity (min 44m, avg 58m) for 246 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 09:03 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 21m
  • Data Points: 43 AIS positions
  • Period: 2026-04-06T09:58:01+00:00 to 2026-04-06T16:19:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 381.3999999999999772626324556767940521240234375,
    "points_in_zone": 43,
    "first_point": {
        "ts": "2026-04-06T09:58:01+00:00",
        "lat": 34.709828299999998080238583497703075408935546875,
        "lon": 33.32302829999999715937519795261323451995849609375
    },
    "last_point": {
        "ts": "2026-04-06T16:19:27+00:00",
        "lat": 34.7098500000000029785951483063399791717529296875,
        "lon": 33.32307670000000143772922456264495849609375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 09:03 UTC 75.0% ▼
  • Duration: 6h 21m
  • Radius: 31 meters
  • Data Points: 43 AIS positions
  • Centroid: 34.7098, 33.3230
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 30.60000000000000142108547152020037174224853515625,
    "duration_minutes": 381.3999999999999772626324556767940521240234375,
    "points": 43,
    "centroid": {
        "lat": 34.7098312069767445109391701407730579376220703125,
        "lon": 33.32304778837210079700525966472923755645751953125
    },
    "bbox": {
        "min_lat": 34.70967999999999875626599532552063465118408203125,
        "min_lon": 33.32276829999999989695425028912723064422607421875,
        "max_lat": 34.7099783000000030597220757044851779937744140625,
        "max_lon": 33.3231583000000028960130293853580951690673828125
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 08:43 UTC 80/100 ▼
Vessel A: IMO 9693824 (WECO MADELEINE) LIBERIA
Vessel B: IMO 9430739 (SRIWANGI III) Singapore
  • Minimum Distance: 330 meters
  • Average Distance: 338 meters
  • Duration: 2h 21m
  • Period: 2026-04-06T08:43:17+00:00 to 2026-04-06T11:04:19+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (WECO MADELEINE and SRIWANGI III) maintained close proximity (min 330m, avg 338m) for 141 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 330m, avg 338m
Duration25/25Duration 141 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-06T13:45:13.213814+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "min_distance_m": 329.8999999999999772626324556767940521240234375,
    "avg_distance_m": 337.5,
    "distance_consistency_m": 4.5,
    "duration_minutes": 141,
    "overlap_duration_s": 8462,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-04-06T08:43:17+00:00",
        "end": "2026-04-06T11:04:19+00:00"
    },
    "points_count": {
        "vessel_a": 40,
        "vessel_b": 40
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 330m, avg 338m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 141 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (WECO MADELEINE and SRIWANGI III) maintained close proximity (min 330m, avg 338m) for 141 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7089909000000034211552701890468597412109375,
            "lon": 33.32149849999999702276909374631941318511962890625
        },
        "time_window": {
            "start_ts": "2026-04-06T08:43:17+00:00",
            "end_ts": "2026-04-06T11:04:19+00:00"
        },
        "searched_at": "2026-04-06T13:45:13.213814+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 08:39 UTC 70/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 305 meters
  • Average Distance: 312 meters
  • Duration: 1h 10m
  • Period: 2026-04-06T08:06:18+00:00 to 2026-04-06T09:16:41+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (SRIWANGI III and FAIR STAR) maintained close proximity (min 305m, avg 312m) for 70 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 305m, avg 312m
Duration15/25Duration 70 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±8m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 304.6000000000000227373675443232059478759765625,
    "avg_distance_m": 311.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 7.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 70.400000000000005684341886080801486968994140625,
    "overlap_duration_s": 4223,
    "speed_a_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_a_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T08:06:18+00:00",
        "end": "2026-04-06T09:16:41+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 305m, avg 312m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 70 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b18m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SRIWANGI III and FAIR STAR) maintained close proximity (min 305m, avg 312m) for 70 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 08:06 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 31m
  • Data Points: 50 AIS positions
  • Period: 2026-04-06T08:54:16+00:00 to 2026-04-06T15:25:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 391.1000000000000227373675443232059478759765625,
    "points_in_zone": 50,
    "first_point": {
        "ts": "2026-04-06T08:54:16+00:00",
        "lat": 34.7097466999999966219547786749899387359619140625,
        "lon": 33.32300500000000198497218661941587924957275390625
    },
    "last_point": {
        "ts": "2026-04-06T15:25:24+00:00",
        "lat": 34.7098117000000030429873731918632984161376953125,
        "lon": 33.32305170000000060781530919484794139862060546875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 08:06 UTC 75.0% ▼
  • Duration: 6h 31m
  • Radius: 1,016 meters
  • Data Points: 50 AIS positions
  • Centroid: 34.7098, 33.3233
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 1016.200000000000045474735088646411895751953125,
    "duration_minutes": 391.1000000000000227373675443232059478759765625,
    "points": 50,
    "centroid": {
        "lat": 34.709792303999989826479577459394931793212890625,
        "lon": 33.323273929999999154460965655744075775146484375
    },
    "bbox": {
        "min_lat": 34.7081950000000034606273402459919452667236328125,
        "min_lon": 33.32276829999999989695425028912723064422607421875,
        "max_lat": 34.7099783000000030597220757044851779937744140625,
        "max_lon": 33.33419669999999968013071338646113872528076171875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 07:07 UTC 70/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 330 meters
  • Average Distance: 336 meters
  • Duration: 1h 25m
  • Period: 2026-04-06T07:51:16+00:00 to 2026-04-06T09:16:41+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 336m) for 85 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 330m, avg 336m
Duration15/25Duration 85 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 329.8999999999999772626324556767940521240234375,
    "avg_distance_m": 336.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 5.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 85.400000000000005684341886080801486968994140625,
    "overlap_duration_s": 5125,
    "speed_a_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_a_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T07:51:16+00:00",
        "end": "2026-04-06T09:16:41+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 330m, avg 336m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 85 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 336m) for 85 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 07:06 UTC 70/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 305 meters
  • Average Distance: 312 meters
  • Duration: 1h 25m
  • Period: 2026-04-06T07:51:16+00:00 to 2026-04-06T09:16:41+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (SRIWANGI III and FAIR STAR) maintained close proximity (min 305m, avg 312m) for 85 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 305m, avg 312m
Duration15/25Duration 85 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±7m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 304.6000000000000227373675443232059478759765625,
    "avg_distance_m": 311.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 7.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 85.400000000000005684341886080801486968994140625,
    "overlap_duration_s": 5125,
    "speed_a_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_a_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T07:51:16+00:00",
        "end": "2026-04-06T09:16:41+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 305m, avg 312m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 85 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SRIWANGI III and FAIR STAR) maintained close proximity (min 305m, avg 312m) for 85 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 07:06 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 25m
  • Data Points: 51 AIS positions
  • Period: 2026-04-06T07:51:16+00:00 to 2026-04-06T14:16:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 385.19999999999998863131622783839702606201171875,
    "points_in_zone": 51,
    "first_point": {
        "ts": "2026-04-06T07:51:16+00:00",
        "lat": 34.70980329999999725032466812990605831146240234375,
        "lon": 33.3230367000000029520379030145704746246337890625
    },
    "last_point": {
        "ts": "2026-04-06T14:16:26+00:00",
        "lat": 34.7098682999999965659299050457775592803955078125,
        "lon": 33.32311829999999730489435023628175258636474609375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 07:06 UTC 75.0% ▼
  • Duration: 6h 25m
  • Radius: 1,017 meters
  • Data Points: 51 AIS positions
  • Centroid: 34.7098, 33.3233
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 1016.700000000000045474735088646411895751953125,
    "duration_minutes": 385.19999999999998863131622783839702606201171875,
    "points": 51,
    "centroid": {
        "lat": 34.70979497058822715871428954415023326873779296875,
        "lon": 33.323269472549014835749403573572635650634765625
    },
    "bbox": {
        "min_lat": 34.7081950000000034606273402459919452667236328125,
        "min_lon": 33.32276829999999989695425028912723064422607421875,
        "max_lat": 34.7099783000000030597220757044851779937744140625,
        "max_lon": 33.33419669999999968013071338646113872528076171875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 06:05 UTC 80/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 330 meters
  • Average Distance: 337 meters
  • Duration: 3h 11m
  • Period: 2026-04-06T06:05:35+00:00 to 2026-04-06T09:16:41+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 337m) for 191 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 330m, avg 337m
Duration25/25Duration 191 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-06T12:45:08.743688+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 329.8999999999999772626324556767940521240234375,
    "avg_distance_m": 337.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 5.5,
    "duration_minutes": 191.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 11466,
    "speed_a_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_a_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T06:05:35+00:00",
        "end": "2026-04-06T09:16:41+00:00"
    },
    "points_count": {
        "vessel_a": 20,
        "vessel_b": 20
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 330m, avg 337m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 191 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 337m) for 191 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70897420000000010986695997416973114013671875,
            "lon": 33.321504599999997253689798526465892791748046875
        },
        "time_window": {
            "start_ts": "2026-04-06T06:05:35+00:00",
            "end_ts": "2026-04-06T09:16:41+00:00"
        },
        "searched_at": "2026-04-06T12:45:08.743688+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 06:05 UTC 80/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 305 meters
  • Average Distance: 313 meters
  • Duration: 3h 11m
  • Period: 2026-04-06T06:05:35+00:00 to 2026-04-06T09:16:41+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SRIWANGI III and FAIR STAR) maintained close proximity (min 305m, avg 313m) for 191 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 305m, avg 313m
Duration25/25Duration 191 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-06T12:45:11.188702+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 304.6000000000000227373675443232059478759765625,
    "avg_distance_m": 312.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 6.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 191.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 11466,
    "speed_a_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_a_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T06:05:35+00:00",
        "end": "2026-04-06T09:16:41+00:00"
    },
    "points_count": {
        "vessel_a": 20,
        "vessel_b": 20
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 305m, avg 313m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 191 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and FAIR STAR) maintained close proximity (min 305m, avg 313m) for 191 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70877899999999982583176461048424243927001953125,
            "lon": 33.3218755999999984851456247270107269287109375
        },
        "time_window": {
            "start_ts": "2026-04-06T06:05:35+00:00",
            "end_ts": "2026-04-06T09:16:41+00:00"
        },
        "searched_at": "2026-04-06T12:45:11.188702+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 06:02 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 34m
  • Data Points: 51 AIS positions
  • Period: 2026-04-06T06:51:18+00:00 to 2026-04-06T13:25:28+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 394.19999999999998863131622783839702606201171875,
    "points_in_zone": 51,
    "first_point": {
        "ts": "2026-04-06T06:51:18+00:00",
        "lat": 34.709783299999998007479007355868816375732421875,
        "lon": 33.3230199999999996407495927996933460235595703125
    },
    "last_point": {
        "ts": "2026-04-06T13:25:28+00:00",
        "lat": 34.7098849999999998772182152606546878814697265625,
        "lon": 33.32307329999999723213477409444749355316162109375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 06:02 UTC 75.0% ▼
  • Duration: 6h 34m
  • Radius: 1,017 meters
  • Data Points: 51 AIS positions
  • Centroid: 34.7098, 33.3233
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 1017,
    "duration_minutes": 394.19999999999998863131622783839702606201171875,
    "points": 51,
    "centroid": {
        "lat": 34.70978856470586748628193163312971591949462890625,
        "lon": 33.3232646019607869902756647206842899322509765625
    },
    "bbox": {
        "min_lat": 34.7081950000000034606273402459919452667236328125,
        "min_lon": 33.32276829999999989695425028912723064422607421875,
        "max_lat": 34.7099783000000030597220757044851779937744140625,
        "max_lon": 33.33419669999999968013071338646113872528076171875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 05:12 UTC 80/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA
  • Minimum Distance: 330 meters
  • Average Distance: 337 meters
  • Duration: 4h 4m
  • Period: 2026-04-06T05:12:37+00:00 to 2026-04-06T09:16:41+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 337m) for 244 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 330m, avg 337m
Duration25/25Duration 244 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 329.69999999999998863131622783839702606201171875,
    "avg_distance_m": 337,
    "distance_consistency_m": 5.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 244.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 14644,
    "speed_a_avg": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.190000000000000002220446049250313080847263336181640625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11000000000000000055511151231257827021181583404541015625,
            "max_sog": 1
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T05:12:37+00:00",
        "end": "2026-04-06T09:16:41+00:00"
    },
    "points_count": {
        "vessel_a": 28,
        "vessel_b": 28
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 330m, avg 337m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 244 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 337m) for 244 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 05:12 UTC 80/100 ▼
Vessel A: IMO 9430739 (SRIWANGI III) Singapore
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 303 meters
  • Average Distance: 313 meters
  • Duration: 4h 4m
  • Period: 2026-04-06T05:12:37+00:00 to 2026-04-06T09:16:41+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (SRIWANGI III and FAIR STAR) maintained close proximity (min 303m, avg 312m) for 244 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 303m, avg 312m
Duration25/25Duration 244 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 303.30000000000001136868377216160297393798828125,
    "avg_distance_m": 312.5,
    "distance_consistency_m": 6,
    "duration_minutes": 244.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 14644,
    "speed_a_avg": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.190000000000000002220446049250313080847263336181640625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11000000000000000055511151231257827021181583404541015625,
            "max_sog": 1
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T05:12:37+00:00",
        "end": "2026-04-06T09:16:41+00:00"
    },
    "points_count": {
        "vessel_a": 28,
        "vessel_b": 28
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 303m, avg 312m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 244 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and FAIR STAR) maintained close proximity (min 303m, avg 312m) for 244 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 05:05 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 1,017 meters
  • Data Points: 52 AIS positions
  • Centroid: 34.7098, 33.3233
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 1017.299999999999954525264911353588104248046875,
    "duration_minutes": 393,
    "points": 52,
    "centroid": {
        "lat": 34.70978586538461030386315542273223400115966796875,
        "lon": 33.323259900000010702569852583110332489013671875
    },
    "bbox": {
        "min_lat": 34.7081950000000034606273402459919452667236328125,
        "min_lon": 33.32276829999999989695425028912723064422607421875,
        "max_lat": 34.7099783000000030597220757044851779937744140625,
        "max_lon": 33.33419669999999968013071338646113872528076171875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 05:01 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 33m
  • Data Points: 52 AIS positions
  • Period: 2026-04-06T05:42:50+00:00 to 2026-04-06T12:15:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 52,
    "first_point": {
        "ts": "2026-04-06T05:42:50+00:00",
        "lat": 34.709755000000001246007741428911685943603515625,
        "lon": 33.32305000000000205773176276125013828277587890625
    },
    "last_point": {
        "ts": "2026-04-06T12:15:48+00:00",
        "lat": 34.70986169999999759738784632645547389984130859375,
        "lon": 33.32304669999999902074705460108816623687744140625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 04:57 UTC 75.0% ▼
  • Duration: 5h 56m
  • Radius: 1,682 meters
  • Data Points: 58 AIS positions
  • Centroid: 34.7087, 33.3234
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 1682.200000000000045474735088646411895751953125,
    "duration_minutes": 356.19999999999998863131622783839702606201171875,
    "points": 58,
    "centroid": {
        "lat": 34.70873333448275133150673354975879192352294921875,
        "lon": 33.323397205172426538410945795476436614990234375
    },
    "bbox": {
        "min_lat": 34.6940416999999996505721355788409709930419921875,
        "min_lon": 33.3223449999999985493559506721794605255126953125,
        "max_lat": 34.70994170000000167419784702360630035400390625,
        "max_lon": 33.33419669999999968013071338646113872528076171875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 04:00 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 33m
  • Data Points: 72 AIS positions
  • Period: 2026-04-06T04:21:07+00:00 to 2026-04-06T10:54:46+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393.6000000000000227373675443232059478759765625,
    "points_in_zone": 72,
    "first_point": {
        "ts": "2026-04-06T04:21:07+00:00",
        "lat": 34.6877283000000034007825888693332672119140625,
        "lon": 33.34323830000000299378370982594788074493408203125
    },
    "last_point": {
        "ts": "2026-04-06T10:54:46+00:00",
        "lat": 34.70994170000000167419784702360630035400390625,
        "lon": 33.3230300000000028148861019872128963470458984375
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Sanctions Monitoring Zone
Apr 6, 2026 03:00 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Sanctions Monitoring Zone
  • Duration: 6h 36m
  • Data Points: 78 AIS positions
  • Period: 2026-04-06T03:42:03+00:00 to 2026-04-06T10:18:58+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396.8999999999999772626324556767940521240234375,
    "points_in_zone": 78,
    "first_point": {
        "ts": "2026-04-06T03:42:03+00:00",
        "lat": 34.68770829999999705250957049429416656494140625,
        "lon": 33.34354170000000294749042950570583343505859375
    },
    "last_point": {
        "ts": "2026-04-06T10:18:58+00:00",
        "lat": 34.709828299999998080238583497703075408935546875,
        "lon": 33.32300169999999894798747845925390720367431640625
    }
}
Methodology: 2026.01.18

Data Source

Vessel observed through FleetLeaks' AIS monitoring system in zones of interest. Identity and position data derived from AIS broadcasts and public maritime databases.

Disclaimer: AIS data can be spoofed or falsified. Vessel identities should be independently verified before making compliance decisions.