FAIR STAR

IMO 9396672

Vessel information

Vessel Name FAIR STAR
IMO Number 9396672
MMSI 636022971
Vessel Type Tanker
Flag 🇱🇷 LIBERIA
Call Sign 5LLH5
Length 229 m
Beam 32 m

Detected Events (100)

Zone Dwell Cape Peninsula Surveillance Zone
Jul 30, 2026 03:02 UTC 80.0% ▼
  • Zone: Cape Peninsula Surveillance Zone
  • Duration: 1h 49m
  • Data Points: 15 AIS positions
  • Period: 2026-07-30T03:02:46+00:00 to 2026-07-30T04:52:17+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_071",
    "zone_name": "Cape Peninsula Surveillance Zone",
    "dwell_minutes": 109.5,
    "points_in_zone": 15,
    "first_point": {
        "ts": "2026-07-30T03:02:46+00:00",
        "lat": 32.38482330000000075642674346454441547393798828125,
        "lon": 31.073473299999999852616383577696979045867919921875
    },
    "last_point": {
        "ts": "2026-07-30T04:52:17+00:00",
        "lat": 32.45743999999999829242369742132723331451416015625,
        "lon": 30.66411000000000086629370343871414661407470703125
    }
}
Methodology: 2026.01.18
Zone Dwell discovered_025
Jul 30, 2026 03:02 UTC 80.0% ▼
  • Zone: discovered_025
  • Duration: 1h 49m
  • Data Points: 15 AIS positions
  • Period: 2026-07-30T03:02:46+00:00 to 2026-07-30T04:52:17+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 109.5,
    "points_in_zone": 15,
    "first_point": {
        "ts": "2026-07-30T03:02:46+00:00",
        "lat": 32.38482330000000075642674346454441547393798828125,
        "lon": 31.073473299999999852616383577696979045867919921875
    },
    "last_point": {
        "ts": "2026-07-30T04:52:17+00:00",
        "lat": 32.45743999999999829242369742132723331451416015625,
        "lon": 30.66411000000000086629370343871414661407470703125
    }
}
Methodology: 2026.01.18
Zone Dwell discovered_025
Jul 30, 2026 02:00 UTC 80.0% ▼
  • Zone: discovered_025
  • Duration: 2h 51m
  • Data Points: 29 AIS positions
  • Period: 2026-07-30T02:00:49+00:00 to 2026-07-30T04:52:17+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 171.5,
    "points_in_zone": 29,
    "first_point": {
        "ts": "2026-07-30T02:00:49+00:00",
        "lat": 32.2699582999999989851858117617666721343994140625,
        "lon": 31.26265670000000085337887867353856563568115234375
    },
    "last_point": {
        "ts": "2026-07-30T04:52:17+00:00",
        "lat": 32.45743999999999829242369742132723331451416015625,
        "lon": 30.66411000000000086629370343871414661407470703125
    }
}
Methodology: 2026.01.18
Zone Dwell discovered_025
Jul 30, 2026 01:06 UTC 80.0% ▼
  • Zone: discovered_025
  • Duration: 3h 45m
  • Data Points: 46 AIS positions
  • Period: 2026-07-30T01:06:48+00:00 to 2026-07-30T04:52:17+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 225.5,
    "points_in_zone": 46,
    "first_point": {
        "ts": "2026-07-30T01:06:48+00:00",
        "lat": 32.1543683000000015681507647968828678131103515625,
        "lon": 31.421748300000000853060555527918040752410888671875
    },
    "last_point": {
        "ts": "2026-07-30T04:52:17+00:00",
        "lat": 32.45743999999999829242369742132723331451416015625,
        "lon": 30.66411000000000086629370343871414661407470703125
    }
}
Methodology: 2026.01.18
Zone Dwell discovered_025
Jul 30, 2026 00:04 UTC 80.0% ▼
  • Zone: discovered_025
  • Duration: 4h 47m
  • Data Points: 51 AIS positions
  • Period: 2026-07-30T00:04:47+00:00 to 2026-07-30T04:52:17+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 287.5,
    "points_in_zone": 51,
    "first_point": {
        "ts": "2026-07-30T00:04:47+00:00",
        "lat": 32.0180916999999993777237250469624996185302734375,
        "lon": 31.596785000000000565023583476431667804718017578125
    },
    "last_point": {
        "ts": "2026-07-30T04:52:17+00:00",
        "lat": 32.45743999999999829242369742132723331451416015625,
        "lon": 30.66411000000000086629370343871414661407470703125
    }
}
Methodology: 2026.01.18
Ais Gap🛰️✗ Western Black Sea Surveillance Zone
Jul 29, 2026 19:13 UTC 70.0% ▼
  • Gap Duration: 4h 51m
  • Last Seen: 2026-07-29T19:13:28+00:00 at 31.4287, 32.4049 (Zone: Western Black Sea Surveillance Zone)
  • Next Seen: 2026-07-30T00:04:47+00:00 at 32.0181, 31.5968

🛰️ Gap Corroboration

✗ No Imagery

These are snapshots that may corroborate presence during the gap. They do not reconstruct a continuous route.

SAR Imagery (Sentinel-1)

Status: ✗ No SAR coverage

No Sentinel-1 scenes covering corridor and time window

VIIRS Thermal Anomaly

Status: ✗ No detections

No VIIRS thermal/light detections in corridor

Searched: 2026-07-30T00:15:05.314052+00:00

Show Raw Evidence JSON
{
    "gap_minutes": 291.30000000000001136868377216160297393798828125,
    "last_seen": {
        "ts": "2026-07-29T19:13:28+00:00",
        "lat": 31.42870669999999932997525320388376712799072265625,
        "lon": 32.40492499999999864712663111276924610137939453125,
        "sog": 11.199999999999999289457264239899814128875732421875,
        "zone_id": "discovered_156"
    },
    "next_seen": {
        "ts": "2026-07-30T00:04:47+00:00",
        "lat": 32.0180916999999993777237250469624996185302734375,
        "lon": 31.596785000000000565023583476431667804718017578125,
        "zone_ids": [
            "discovered_025"
        ]
    },
    "gap_enrichment": {
        "status": "not_found",
        "corridor": {
            "start": {
                "lat": 31.42870669999999932997525320388376712799072265625,
                "lon": 32.40492499999999864712663111276924610137939453125,
                "ts": "2026-07-29T19:13:28+00:00"
            },
            "end": {
                "lat": 32.0180916999999993777237250469624996185302734375,
                "lon": 31.596785000000000565023583476431667804718017578125,
                "ts": "2026-07-30T00:04:47+00:00"
            },
            "bbox": {
                "min_lat": 31.248526999999999276269591064192354679107666015625,
                "min_lon": 31.3849569999999999936335370875895023345947265625,
                "max_lat": 32.198272000000002890374162234365940093994140625,
                "max_lon": 32.6167530000000027712303563021123409271240234375
            },
            "buffer_km": 20
        },
        "sar": {
            "status": "not_found",
            "notes": "No Sentinel-1 scenes covering corridor and time window"
        },
        "viirs": {
            "status": "not_found",
            "notes": "No VIIRS thermal\/light detections in corridor"
        },
        "searched_at": "2026-07-30T00:15:05.314052+00:00"
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Apr 6, 2026 10:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 1h 10m
  • Data Points: 51 AIS positions
  • Period: 2026-04-06T10:00:48+00:00 to 2026-04-06T11:11:07+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 70.2999999999999971578290569595992565155029296875,
    "points_in_zone": 51,
    "first_point": {
        "ts": "2026-04-06T10:00:48+00:00",
        "lat": 34.70654329999999987421688274480402469635009765625,
        "lon": 33.3200982999999979483618517406284809112548828125
    },
    "last_point": {
        "ts": "2026-04-06T11:11:07+00:00",
        "lat": 34.5339349999999996043698047287762165069580078125,
        "lon": 33.29119670000000041909515857696533203125
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Istanbul Black Sea Surveillance 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: Istanbul Black Sea Surveillance 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 Istanbul Black Sea Surveillance Zone
Apr 6, 2026 09:09 UTC 64/100 ▼
Vessel A: IMO 9517288 (ALFA SEA) Panama
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 266 meters
  • Average Distance: 338 meters
  • Duration: 47 minutes
  • Period: 2026-04-06T09:09:32+00:00 to 2026-04-06T09:57:09+00:00
  • Vessel A Avg Speed: 0.3 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 64/100

Moderate-confidence STS candidate. Two tankers (ALFA SEA and FAIR STAR) maintained close proximity (min 266m, avg 338m) for 48 minutes. Both vessels were slow-moving (avg speeds 0.3 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 266m, avg 338m
Duration10/25Duration 48 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency12/15Distance variance ±44m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 266,
    "avg_distance_m": 338.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 43.7999999999999971578290569595992565155029296875,
    "duration_minutes": 47.60000000000000142108547152020037174224853515625,
    "overlap_duration_s": 2857,
    "speed_a_avg": 0.2600000000000000088817841970012523233890533447265625,
    "speed_a_std": 0.39000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.2600000000000000088817841970012523233890533447265625,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T09:09:32+00:00",
        "end": "2026-04-06T09:57:09+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 64,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 266m, avg 338m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 48 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 12,
                "max": 15,
                "detail": "Distance variance \u00b144m"
            },
            "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 (ALFA SEA and FAIR STAR) maintained close proximity (min 266m, avg 338m) for 48 minutes. Both vessels were slow-moving (avg speeds 0.3 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🛰️✗ Istanbul Black Sea Surveillance Zone
Apr 6, 2026 09:04 UTC 72/100 ▼
Vessel A: IMO 9693824 (WECO MADELEINE) LIBERIA
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 78 meters
  • Average Distance: 125 meters
  • Duration: 1h 9m
  • Period: 2026-04-06T09:04:21+00:00 to 2026-04-06T10:13:20+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.5 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 72/100

Moderate-confidence STS candidate. Two tankers (WECO MADELEINE and FAIR STAR) maintained close proximity (min 78m, avg 125m) for 69 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.5 knots). Moderate distance variation observed during the encounter. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 78m, avg 125m
Duration15/25Duration 69 minutes
Speed Stability14/20both nearly stationary; somewhat variable speeds
Distance Consistency8/15Distance variance ±90m
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: 2026-04-06T15:45:06.816392+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 78.400000000000005684341886080801486968994140625,
    "avg_distance_m": 124.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 90,
    "duration_minutes": 69,
    "overlap_duration_s": 4139,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.450000000000000011102230246251565404236316680908203125,
    "speed_b_std": 0.7800000000000000266453525910037569701671600341796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.450000000000000011102230246251565404236316680908203125,
            "max_sog": 2
        }
    },
    "time_window": {
        "start": "2026-04-06T09:04:21+00:00",
        "end": "2026-04-06T10:13:20+00:00"
    },
    "points_count": {
        "vessel_a": 20,
        "vessel_b": 20
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 72,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 78m, avg 125m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 69 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 8,
                "max": 15,
                "detail": "Distance variance \u00b190m"
            },
            "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 (WECO MADELEINE and FAIR STAR) maintained close proximity (min 78m, avg 125m) for 69 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.5 knots). Moderate distance variation observed during the encounter. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70774999999999721467247582040727138519287109375,
            "lon": 33.3201549999999997453414835035800933837890625
        },
        "time_window": {
            "start_ts": "2026-04-06T09:04:21+00:00",
            "end_ts": "2026-04-06T10:13:20+00:00"
        },
        "searched_at": "2026-04-06T15:45:06.816392+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Apr 6, 2026 09:03 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 2h 7m
  • Data Points: 68 AIS positions
  • Period: 2026-04-06T09:03:57+00:00 to 2026-04-06T11:11:07+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 127.2000000000000028421709430404007434844970703125,
    "points_in_zone": 68,
    "first_point": {
        "ts": "2026-04-06T09:03:57+00:00",
        "lat": 34.707778300000001081571099348366260528564453125,
        "lon": 33.32070329999999813708200235851109027862548828125
    },
    "last_point": {
        "ts": "2026-04-06T11:11:07+00:00",
        "lat": 34.5339349999999996043698047287762165069580078125,
        "lon": 33.29119670000000041909515857696533203125
    }
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance 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: Istanbul Black Sea Surveillance 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
Sts🛰️✗ Istanbul Black Sea Surveillance Zone
Apr 6, 2026 08:01 UTC 82/100 ▼
Vessel A: IMO 9693824 (WECO MADELEINE) LIBERIA
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 78 meters
  • Average Distance: 106 meters
  • Duration: 2h 12m
  • Period: 2026-04-06T08:01:21+00:00 to 2026-04-06T10:13:20+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.3 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 82/100

High-confidence STS candidate. Two tankers (WECO MADELEINE and FAIR STAR) maintained close proximity (min 78m, avg 106m) for 132 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.2 knots). Moderate distance variation observed during the encounter. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 78m, avg 106m
Duration25/25Duration 132 minutes
Speed Stability14/20both nearly stationary; somewhat variable speeds
Distance Consistency8/15Distance variance ±71m
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: 2026-04-06T14:45:06.560411+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 78.400000000000005684341886080801486968994140625,
    "avg_distance_m": 105.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 70.7999999999999971578290569595992565155029296875,
    "duration_minutes": 132,
    "overlap_duration_s": 7919,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.25,
    "speed_b_std": 0.63000000000000000444089209850062616169452667236328125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.25,
            "max_sog": 2
        }
    },
    "time_window": {
        "start": "2026-04-06T08:01:21+00:00",
        "end": "2026-04-06T10:13:20+00:00"
    },
    "points_count": {
        "vessel_a": 35,
        "vessel_b": 35
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 82,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 78m, avg 106m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 132 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 8,
                "max": 15,
                "detail": "Distance variance \u00b171m"
            },
            "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 FAIR STAR) maintained close proximity (min 78m, avg 106m) for 132 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.2 knots). Moderate distance variation observed during the encounter. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7078369999999978290361468680202960968017578125,
            "lon": 33.32023120000000204754542210139334201812744140625
        },
        "time_window": {
            "start_ts": "2026-04-06T08:01:21+00:00",
            "end_ts": "2026-04-06T10:13:20+00:00"
        },
        "searched_at": "2026-04-06T14:45:06.560411+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Apr 6, 2026 08:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 3h 10m
  • Data Points: 87 AIS positions
  • Period: 2026-04-06T08:00:48+00:00 to 2026-04-06T11:11:07+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 190.30000000000001136868377216160297393798828125,
    "points_in_zone": 87,
    "first_point": {
        "ts": "2026-04-06T08:00:48+00:00",
        "lat": 34.70775669999999735182427684776484966278076171875,
        "lon": 33.32070499999999668716554879210889339447021484375
    },
    "last_point": {
        "ts": "2026-04-06T11:11:07+00:00",
        "lat": 34.5339349999999996043698047287762165069580078125,
        "lon": 33.29119670000000041909515857696533203125
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 6, 2026 08:00 UTC 75.0% ▼
  • Duration: 1h 52m
  • Radius: 1,162 meters
  • Data Points: 35 AIS positions
  • Centroid: 34.7070, 33.3199
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 1162.40000000000009094947017729282379150390625,
    "duration_minutes": 112.5,
    "points": 35,
    "centroid": {
        "lat": 34.7070134657142688183739664964377880096435546875,
        "lon": 33.31989747428571035925415344536304473876953125
    },
    "bbox": {
        "min_lat": 34.6991349999999982856024871580302715301513671875,
        "min_lon": 33.31153330000000067911969381384551525115966796875,
        "max_lat": 34.70779499999999728743205196224153041839599609375,
        "max_lon": 33.3208249999999992496668710373342037200927734375
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 6, 2026 07:06 UTC 82/100 ▼
Vessel A: IMO 9693824 (WECO MADELEINE) LIBERIA
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 78 meters
  • Average Distance: 103 meters
  • Duration: 3 hours
  • Period: 2026-04-06T07:13:22+00:00 to 2026-04-06T10:13:20+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 82/100

High-confidence STS candidate. Two tankers (WECO MADELEINE and FAIR STAR) maintained close proximity (min 78m, avg 103m) for 180 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.2 knots). Moderate distance variation observed during the encounter. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 78m, avg 103m
Duration25/25Duration 180 minutes
Speed Stability14/20both nearly stationary; somewhat variable speeds
Distance Consistency8/15Distance variance ±67m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 78.400000000000005684341886080801486968994140625,
    "avg_distance_m": 103.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 67.400000000000005684341886080801486968994140625,
    "duration_minutes": 180,
    "overlap_duration_s": 10798,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_b_std": 0.59999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.2300000000000000099920072216264088638126850128173828125,
            "max_sog": 2
        }
    },
    "time_window": {
        "start": "2026-04-06T07:13:22+00:00",
        "end": "2026-04-06T10:13:20+00:00"
    },
    "points_count": {
        "vessel_a": 39,
        "vessel_b": 39
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 82,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 78m, avg 103m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 180 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 8,
                "max": 15,
                "detail": "Distance variance \u00b167m"
            },
            "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 FAIR STAR) maintained close proximity (min 78m, avg 103m) for 180 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.2 knots). Moderate distance variation observed during the encounter. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance 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: Istanbul Black Sea Surveillance 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 Istanbul Black Sea Surveillance Zone
Apr 6, 2026 07:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 4h 10m
  • Data Points: 95 AIS positions
  • Period: 2026-04-06T07:00:50+00:00 to 2026-04-06T11:11:07+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 250.30000000000001136868377216160297393798828125,
    "points_in_zone": 95,
    "first_point": {
        "ts": "2026-04-06T07:00:50+00:00",
        "lat": 34.70774999999999721467247582040727138519287109375,
        "lon": 33.32069829999999655001374776475131511688232421875
    },
    "last_point": {
        "ts": "2026-04-06T11:11:07+00:00",
        "lat": 34.5339349999999996043698047287762165069580078125,
        "lon": 33.29119670000000041909515857696533203125
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 6, 2026 07:00 UTC 75.0% ▼
  • Duration: 3h 11m
  • Radius: 947 meters
  • Data Points: 49 AIS positions
  • Centroid: 34.7074, 33.3203
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 946.8999999999999772626324556767940521240234375,
    "duration_minutes": 191.400000000000005684341886080801486968994140625,
    "points": 49,
    "centroid": {
        "lat": 34.7073995510204014180999365635216236114501953125,
        "lon": 33.32031468979590727030881680548191070556640625
    },
    "bbox": {
        "min_lat": 34.7011083000000013498720363713800907135009765625,
        "min_lon": 33.31333000000000055251803132705390453338623046875,
        "max_lat": 34.70779499999999728743205196224153041839599609375,
        "max_lon": 33.3208249999999992496668710373342037200927734375
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Istanbul Black Sea Surveillance 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: Istanbul Black Sea Surveillance 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
Sts🛰️✗ Istanbul Black Sea Surveillance Zone
Apr 6, 2026 06:04 UTC 85/100 ▼
Vessel A: IMO 9693824 (WECO MADELEINE) LIBERIA
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 78 meters
  • Average Distance: 96 meters
  • Duration: 4h 9m
  • Period: 2026-04-06T06:04:19+00:00 to 2026-04-06T10:13:20+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (WECO MADELEINE and FAIR STAR) maintained close proximity (min 78m, avg 96m) for 249 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.2 knots). Moderate distance variation observed during the encounter. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 78m, avg 96m
Duration25/25Duration 249 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency8/15Distance variance ±56m
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: 2026-04-06T13:00:02.219063+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 78.400000000000005684341886080801486968994140625,
    "avg_distance_m": 96.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 56.5,
    "duration_minutes": 249,
    "overlap_duration_s": 14941,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.1600000000000000033306690738754696212708950042724609375,
    "speed_b_std": 0.5,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.1600000000000000033306690738754696212708950042724609375,
            "max_sog": 2
        }
    },
    "time_window": {
        "start": "2026-04-06T06:04:19+00:00",
        "end": "2026-04-06T10:13:20+00:00"
    },
    "points_count": {
        "vessel_a": 57,
        "vessel_b": 57
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 78m, avg 96m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 249 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 8,
                "max": 15,
                "detail": "Distance variance \u00b156m"
            },
            "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 FAIR STAR) maintained close proximity (min 78m, avg 96m) for 249 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.2 knots). Moderate distance variation observed during the encounter. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70787680000000108293534140102565288543701171875,
            "lon": 33.32027120000000053323674364946782588958740234375
        },
        "time_window": {
            "start_ts": "2026-04-06T06:04:19+00:00",
            "end_ts": "2026-04-06T10:13:20+00:00"
        },
        "searched_at": "2026-04-06T13:00:02.219063+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Apr 6, 2026 06:03 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 5h 7m
  • Data Points: 111 AIS positions
  • Period: 2026-04-06T06:03:52+00:00 to 2026-04-06T11:11:07+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 307.19999999999998863131622783839702606201171875,
    "points_in_zone": 111,
    "first_point": {
        "ts": "2026-04-06T06:03:52+00:00",
        "lat": 34.7077349999999995588950696401298046112060546875,
        "lon": 33.32070329999999813708200235851109027862548828125
    },
    "last_point": {
        "ts": "2026-04-06T11:11:07+00:00",
        "lat": 34.5339349999999996043698047287762165069580078125,
        "lon": 33.29119670000000041909515857696533203125
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 6, 2026 06:03 UTC 75.0% ▼
  • Duration: 4h 8m
  • Radius: 960 meters
  • Data Points: 65 AIS positions
  • Centroid: 34.7075, 33.3204
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 959.700000000000045474735088646411895751953125,
    "duration_minutes": 248.400000000000005684341886080801486968994140625,
    "points": 65,
    "centroid": {
        "lat": 34.707483455384618764583137817680835723876953125,
        "lon": 33.32041179076923498314499738626182079315185546875
    },
    "bbox": {
        "min_lat": 34.7011083000000013498720363713800907135009765625,
        "min_lon": 33.31333000000000055251803132705390453338623046875,
        "max_lat": 34.70779499999999728743205196224153041839599609375,
        "max_lon": 33.3208249999999992496668710373342037200927734375
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance 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: Istanbul Black Sea Surveillance 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
Sts🛰️✗ Istanbul Black Sea Surveillance Zone
Apr 6, 2026 05:01 UTC 85/100 ▼
Vessel A: IMO 9693824 (WECO MADELEINE) LIBERIA
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 78 meters
  • Average Distance: 93 meters
  • Duration: 5h 12m
  • Period: 2026-04-06T05:01:21+00:00 to 2026-04-06T10:13:20+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (WECO MADELEINE and FAIR STAR) maintained close proximity (min 78m, avg 93m) for 312 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). Moderate distance variation observed during the encounter. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 78m, avg 93m
Duration25/25Duration 312 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency8/15Distance variance ±50m
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: 2026-04-06T11:45:08.863070+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 78.400000000000005684341886080801486968994140625,
    "avg_distance_m": 93.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 50.5,
    "duration_minutes": 312,
    "overlap_duration_s": 18719,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.11999999999999999555910790149937383830547332763671875,
    "speed_b_std": 0.450000000000000011102230246251565404236316680908203125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.11999999999999999555910790149937383830547332763671875,
            "max_sog": 2
        }
    },
    "time_window": {
        "start": "2026-04-06T05:01:21+00:00",
        "end": "2026-04-06T10:13:20+00:00"
    },
    "points_count": {
        "vessel_a": 72,
        "vessel_b": 72
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 78m, avg 93m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 312 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 8,
                "max": 15,
                "detail": "Distance variance \u00b150m"
            },
            "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 FAIR STAR) maintained close proximity (min 78m, avg 93m) for 312 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). Moderate distance variation observed during the encounter. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70789070000000009486029739491641521453857421875,
            "lon": 33.3202844999999996389306033961474895477294921875
        },
        "time_window": {
            "start_ts": "2026-04-06T05:01:21+00:00",
            "end_ts": "2026-04-06T10:13:20+00:00"
        },
        "searched_at": "2026-04-06T11:45:08.863070+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Apr 6, 2026 05:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 10m
  • Data Points: 128 AIS positions
  • Period: 2026-04-06T05:00:50+00:00 to 2026-04-06T11:11:07+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 370.30000000000001136868377216160297393798828125,
    "points_in_zone": 128,
    "first_point": {
        "ts": "2026-04-06T05:00:50+00:00",
        "lat": 34.707729999999997971826815046370029449462890625,
        "lon": 33.32070999999999827423380338586866855621337890625
    },
    "last_point": {
        "ts": "2026-04-06T11:11:07+00:00",
        "lat": 34.5339349999999996043698047287762165069580078125,
        "lon": 33.29119670000000041909515857696533203125
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 6, 2026 05:00 UTC 75.0% ▼
  • Duration: 5h 11m
  • Radius: 968 meters
  • Data Points: 82 AIS positions
  • Centroid: 34.7075, 33.3205
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 968,
    "duration_minutes": 311.3999999999999772626324556767940521240234375,
    "points": 82,
    "centroid": {
        "lat": 34.707537091463422029846697114408016204833984375,
        "lon": 33.3204737390243934669342706911265850067138671875
    },
    "bbox": {
        "min_lat": 34.7011083000000013498720363713800907135009765625,
        "min_lon": 33.31333000000000055251803132705390453338623046875,
        "max_lat": 34.70779499999999728743205196224153041839599609375,
        "max_lon": 33.3208249999999992496668710373342037200927734375
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Istanbul Black Sea Surveillance Zone
Apr 6, 2026 04:04 UTC 89/100 ▼
Vessel A: IMO 9693824 (WECO MADELEINE) LIBERIA
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 78 meters
  • Average Distance: 91 meters
  • Duration: 6h 9m
  • Period: 2026-04-06T04:04:19+00:00 to 2026-04-06T10:13:20+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 89/100

High-confidence STS candidate. Two tankers (WECO MADELEINE and FAIR STAR) maintained close proximity (min 78m, avg 91m) for 369 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 Tightness25/25Min distance 78m, avg 91m
Duration25/25Duration 369 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency12/15Distance variance ±46m
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: 2026-04-06T10:45:18.807654+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 78.400000000000005684341886080801486968994140625,
    "avg_distance_m": 91.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 45.7999999999999971578290569595992565155029296875,
    "duration_minutes": 369,
    "overlap_duration_s": 22141,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_std": 0.409999999999999975575093458246556110680103302001953125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 2
        }
    },
    "time_window": {
        "start": "2026-04-06T04:04:19+00:00",
        "end": "2026-04-06T10:13:20+00:00"
    },
    "points_count": {
        "vessel_a": 88,
        "vessel_b": 88
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 89,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 78m, avg 91m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 369 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 12,
                "max": 15,
                "detail": "Distance variance \u00b146m"
            },
            "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 FAIR STAR) maintained close proximity (min 78m, avg 91m) for 369 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": 34.7079006000000021003870642744004726409912109375,
            "lon": 33.3202926000000019257640815339982509613037109375
        },
        "time_window": {
            "start_ts": "2026-04-06T04:04:19+00:00",
            "end_ts": "2026-04-06T10:13:20+00:00"
        },
        "searched_at": "2026-04-06T10:45:18.807654+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Apr 6, 2026 04:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 28m
  • Data Points: 133 AIS positions
  • Period: 2026-04-06T04:42:10+00:00 to 2026-04-06T11:11:07+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 388.8999999999999772626324556767940521240234375,
    "points_in_zone": 133,
    "first_point": {
        "ts": "2026-04-06T04:42:10+00:00",
        "lat": 34.70773669999999810897861607372760772705078125,
        "lon": 33.32070999999999827423380338586866855621337890625
    },
    "last_point": {
        "ts": "2026-04-06T11:11:07+00:00",
        "lat": 34.5339349999999996043698047287762165069580078125,
        "lon": 33.29119670000000041909515857696533203125
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 6, 2026 04:00 UTC 75.0% ▼
  • Duration: 6h 12m
  • Radius: 973 meters
  • Data Points: 99 AIS positions
  • Centroid: 34.7076, 33.3205
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 973.3999999999999772626324556767940521240234375,
    "duration_minutes": 372.1000000000000227373675443232059478759765625,
    "points": 99,
    "centroid": {
        "lat": 34.7075725575757445540148182772099971771240234375,
        "lon": 33.32051449191919090253577451221644878387451171875
    },
    "bbox": {
        "min_lat": 34.7011083000000013498720363713800907135009765625,
        "min_lon": 33.31333000000000055251803132705390453338623046875,
        "max_lat": 34.70779499999999728743205196224153041839599609375,
        "max_lon": 33.3208249999999992496668710373342037200927734375
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 6, 2026 03:31 UTC 89/100 ▼
Vessel A: IMO 9693824 (WECO MADELEINE) LIBERIA
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 78 meters
  • Average Distance: 91 meters
  • Duration: 6h 29m
  • Period: 2026-04-06T03:43:59+00:00 to 2026-04-06T10:13:20+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 89/100

High-confidence STS candidate. Two tankers (WECO MADELEINE and FAIR STAR) maintained close proximity (min 78m, avg 91m) for 389 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 Tightness25/25Min distance 78m, avg 91m
Duration25/25Duration 389 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency12/15Distance variance ±45m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 78.400000000000005684341886080801486968994140625,
    "avg_distance_m": 90.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 44.60000000000000142108547152020037174224853515625,
    "duration_minutes": 389.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 23361,
    "speed_a_avg": 0,
    "speed_a_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_std": 0.40000000000000002220446049250313080847263336181640625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 2
        }
    },
    "time_window": {
        "start": "2026-04-06T03:43:59+00:00",
        "end": "2026-04-06T10:13:20+00:00"
    },
    "points_count": {
        "vessel_a": 93,
        "vessel_b": 93
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 89,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 78m, avg 91m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 389 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 12,
                "max": 15,
                "detail": "Distance variance \u00b145m"
            },
            "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 FAIR STAR) maintained close proximity (min 78m, avg 91m) for 389 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."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Istanbul Black Sea Surveillance Zone
Apr 6, 2026 03:00 UTC 75/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 297 meters
  • Average Distance: 301 meters
  • Duration: 1h 27m
  • Period: 2026-04-06T03:00:46+00:00 to 2026-04-06T04:28:17+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 88 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 297m, avg 301m
Duration15/25Duration 88 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
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: 2026-04-06T09:45:11.643229+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 297.1000000000000227373675443232059478759765625,
    "avg_distance_m": 301.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 87.5,
    "overlap_duration_s": 5251,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-06T03:00:46+00:00",
        "end": "2026-04-06T04:28:17+00:00"
    },
    "points_count": {
        "vessel_a": 27,
        "vessel_b": 27
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 297m, avg 301m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 88 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 88 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": 34.7086967999999984613168635405600070953369140625,
            "lon": 33.32188219999999745368768344633281230926513671875
        },
        "time_window": {
            "start_ts": "2026-04-06T03:00:46+00:00",
            "end_ts": "2026-04-06T04:28:17+00:00"
        },
        "searched_at": "2026-04-06T09:45:11.643229+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Apr 6, 2026 03:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 37m
  • Data Points: 113 AIS positions
  • Period: 2026-04-06T03:51:08+00:00 to 2026-04-06T10:29:00+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 397.8999999999999772626324556767940521240234375,
    "points_in_zone": 113,
    "first_point": {
        "ts": "2026-04-06T03:51:08+00:00",
        "lat": 34.7077349999999995588950696401298046112060546875,
        "lon": 33.32070329999999813708200235851109027862548828125
    },
    "last_point": {
        "ts": "2026-04-06T10:29:00+00:00",
        "lat": 34.67035829999999663186827092431485652923583984375,
        "lon": 33.314768299999997225313563831150531768798828125
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 6, 2026 03:00 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 975 meters
  • Data Points: 105 AIS positions
  • Centroid: 34.7076, 33.3205
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 974.8999999999999772626324556767940521240234375,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "points": 105,
    "centroid": {
        "lat": 34.70758247523809814083506353199481964111328125,
        "lon": 33.3205253142857173997981590218842029571533203125
    },
    "bbox": {
        "min_lat": 34.7011083000000013498720363713800907135009765625,
        "min_lon": 33.31333000000000055251803132705390453338623046875,
        "max_lat": 34.70779499999999728743205196224153041839599609375,
        "max_lon": 33.3208249999999992496668710373342037200927734375
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Istanbul Black Sea Surveillance Zone
Apr 6, 2026 02:00 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 297 meters
  • Average Distance: 301 meters
  • Duration: 2h 27m
  • Period: 2026-04-06T02:00:46+00:00 to 2026-04-06T04:28:17+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 148 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 297m, avg 301m
Duration25/25Duration 148 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
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: 2026-04-06T08:45:08.663803+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 297.1000000000000227373675443232059478759765625,
    "avg_distance_m": 301.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 147.5,
    "overlap_duration_s": 8851,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0,
    "speed_b_std": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-06T02:00:46+00:00",
        "end": "2026-04-06T04:28:17+00:00"
    },
    "points_count": {
        "vessel_a": 45,
        "vessel_b": 45
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 297m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 148 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 148 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": 34.7086972000000031357558327727019786834716796875,
            "lon": 33.3218829999999996971382643096148967742919921875
        },
        "time_window": {
            "start_ts": "2026-04-06T02:00:46+00:00",
            "end_ts": "2026-04-06T04:28:17+00:00"
        },
        "searched_at": "2026-04-06T08:45:08.663803+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Apr 6, 2026 02:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 107 AIS positions
  • Period: 2026-04-06T02:54:05+00:00 to 2026-04-06T09:27:53+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393.80000000000001136868377216160297393798828125,
    "points_in_zone": 107,
    "first_point": {
        "ts": "2026-04-06T02:54:05+00:00",
        "lat": 34.70776000000000038880898500792682170867919921875,
        "lon": 33.320688300000000481304596178233623504638671875
    },
    "last_point": {
        "ts": "2026-04-06T09:27:53+00:00",
        "lat": 34.7077799999999996316546457819640636444091796875,
        "lon": 33.32070829999999972415025695227086544036865234375
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 6, 2026 02:00 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 5 meters
  • Data Points: 107 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5,
    "duration_minutes": 393.80000000000001136868377216160297393798828125,
    "points": 107,
    "centroid": {
        "lat": 34.70775039065419065309470170177519321441650390625,
        "lon": 33.32070487196262575935179484076797962188720703125
    },
    "bbox": {
        "min_lat": 34.707729999999997971826815046370029449462890625,
        "min_lon": 33.32068670000000309983079205267131328582763671875,
        "max_lat": 34.70779499999999728743205196224153041839599609375,
        "max_lon": 33.32072329999999737992766313254833221435546875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Istanbul Black Sea Surveillance Zone
Apr 6, 2026 01:00 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 297 meters
  • Average Distance: 301 meters
  • Duration: 3h 27m
  • Period: 2026-04-06T01:00:39+00:00 to 2026-04-06T04:28:17+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 208 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 297m, avg 301m
Duration25/25Duration 208 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
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: 2026-04-06T07:45:09.266635+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 297.1000000000000227373675443232059478759765625,
    "avg_distance_m": 301.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 207.599999999999994315658113919198513031005859375,
    "overlap_duration_s": 12458,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-06T01:00:39+00:00",
        "end": "2026-04-06T04:28:17+00:00"
    },
    "points_count": {
        "vessel_a": 64,
        "vessel_b": 64
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 297m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 208 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 208 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": 34.70869619999999855508576729334890842437744140625,
            "lon": 33.32188270000000329673639498651027679443359375
        },
        "time_window": {
            "start_ts": "2026-04-06T01:00:39+00:00",
            "end_ts": "2026-04-06T04:28:17+00:00"
        },
        "searched_at": "2026-04-06T07:45:09.266635+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Apr 6, 2026 01:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 109 AIS positions
  • Period: 2026-04-06T01:51:09+00:00 to 2026-04-06T08:27:53+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396.69999999999998863131622783839702606201171875,
    "points_in_zone": 109,
    "first_point": {
        "ts": "2026-04-06T01:51:09+00:00",
        "lat": 34.70775669999999735182427684776484966278076171875,
        "lon": 33.3206933000000020683728507719933986663818359375
    },
    "last_point": {
        "ts": "2026-04-06T08:27:53+00:00",
        "lat": 34.70775830000000183872543857432901859283447265625,
        "lon": 33.32070499999999668716554879210889339447021484375
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 6, 2026 01:00 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 2 meters
  • Data Points: 109 AIS positions
  • Centroid: 34.7077, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 396.69999999999998863131622783839702606201171875,
    "points": 109,
    "centroid": {
        "lat": 34.707748122018330150240217335522174835205078125,
        "lon": 33.3207045082568953375812270678579807281494140625
    },
    "bbox": {
        "min_lat": 34.707729999999997971826815046370029449462890625,
        "min_lon": 33.32068670000000309983079205267131328582763671875,
        "max_lat": 34.707768299999997907434590160846710205078125,
        "max_lon": 33.32072329999999737992766313254833221435546875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Istanbul Black Sea Surveillance Zone
Apr 6, 2026 00:00 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 297 meters
  • Average Distance: 301 meters
  • Duration: 4h 27m
  • Period: 2026-04-06T00:00:39+00:00 to 2026-04-06T04:28:17+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 268 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 297m, avg 301m
Duration25/25Duration 268 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
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: 2026-04-06T06:45:12.382833+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 297.1000000000000227373675443232059478759765625,
    "avg_distance_m": 301,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 267.6000000000000227373675443232059478759765625,
    "overlap_duration_s": 16058,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-06T00:00:39+00:00",
        "end": "2026-04-06T04:28:17+00:00"
    },
    "points_count": {
        "vessel_a": 81,
        "vessel_b": 81
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 297m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 268 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 268 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": 34.70869569999999981746441335417330265045166015625,
            "lon": 33.32188260000000212812665267847478389739990234375
        },
        "time_window": {
            "start_ts": "2026-04-06T00:00:39+00:00",
            "end_ts": "2026-04-06T04:28:17+00:00"
        },
        "searched_at": "2026-04-06T06:45:12.382833+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Apr 6, 2026 00:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 115 AIS positions
  • Period: 2026-04-06T00:42:09+00:00 to 2026-04-06T07:12:53+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 390.69999999999998863131622783839702606201171875,
    "points_in_zone": 115,
    "first_point": {
        "ts": "2026-04-06T00:42:09+00:00",
        "lat": 34.70775499999999880174073041416704654693603515625,
        "lon": 33.3207000000000022055246517993509769439697265625
    },
    "last_point": {
        "ts": "2026-04-06T07:12:53+00:00",
        "lat": 34.7077383000000025958797778002917766571044921875,
        "lon": 33.3207067000000023426764528267085552215576171875
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 6, 2026 00:00 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 2 meters
  • Data Points: 115 AIS positions
  • Centroid: 34.7077, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 390.69999999999998863131622783839702606201171875,
    "points": 115,
    "centroid": {
        "lat": 34.70774800173911245337876607663929462432861328125,
        "lon": 33.32070415739131163945785374380648136138916015625
    },
    "bbox": {
        "min_lat": 34.707729999999997971826815046370029449462890625,
        "min_lon": 33.32068670000000309983079205267131328582763671875,
        "max_lat": 34.707768299999997907434590160846710205078125,
        "max_lon": 33.32072329999999737992766313254833221435546875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Istanbul Black Sea Surveillance Zone
Apr 5, 2026 23:00 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 297 meters
  • Average Distance: 301 meters
  • Duration: 5h 27m
  • Period: 2026-04-05T23:00:47+00:00 to 2026-04-06T04:28:17+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 328 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 297m, avg 301m
Duration25/25Duration 328 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
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: 2026-04-06T05:45:09.310562+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 296.8999999999999772626324556767940521240234375,
    "avg_distance_m": 300.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 327.5,
    "overlap_duration_s": 19650,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T23:00:47+00:00",
        "end": "2026-04-06T04:28:17+00:00"
    },
    "points_count": {
        "vessel_a": 97,
        "vessel_b": 97
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 297m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 328 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 328 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": 34.7086948999999975740138324908912181854248046875,
            "lon": 33.32188169999999871606632950715720653533935546875
        },
        "time_window": {
            "start_ts": "2026-04-05T23:00:47+00:00",
            "end_ts": "2026-04-06T04:28:17+00:00"
        },
        "searched_at": "2026-04-06T05:45:09.310562+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Apr 5, 2026 23:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 119 AIS positions
  • Period: 2026-04-05T23:51:09+00:00 to 2026-04-06T06:27:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396.69999999999998863131622783839702606201171875,
    "points_in_zone": 119,
    "first_point": {
        "ts": "2026-04-05T23:51:09+00:00",
        "lat": 34.7077450000000027330315788276493549346923828125,
        "lon": 33.3206966999999991685399436391890048980712890625
    },
    "last_point": {
        "ts": "2026-04-06T06:27:51+00:00",
        "lat": 34.707729999999997971826815046370029449462890625,
        "lon": 33.32071169999999682431734981946647167205810546875
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 23:00 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 2 meters
  • Data Points: 119 AIS positions
  • Centroid: 34.7077, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 2.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 396.69999999999998863131622783839702606201171875,
    "points": 119,
    "centroid": {
        "lat": 34.70774934453779536625006585381925106048583984375,
        "lon": 33.32070351428571797214317484758794307708740234375
    },
    "bbox": {
        "min_lat": 34.707729999999997971826815046370029449462890625,
        "min_lon": 33.32068670000000309983079205267131328582763671875,
        "max_lat": 34.707768299999997907434590160846710205078125,
        "max_lon": 33.32072329999999737992766313254833221435546875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts🛰️✗ Istanbul Black Sea Surveillance Zone
Apr 5, 2026 22:00 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 297 meters
  • Average Distance: 301 meters
  • Duration: 6h 27m
  • Period: 2026-04-05T22:00:46+00:00 to 2026-04-06T04:28:17+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 388 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 297m, avg 301m
Duration25/25Duration 388 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
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: 2026-04-06T04:45:08.936809+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 296.8999999999999772626324556767940521240234375,
    "avg_distance_m": 300.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 387.5,
    "overlap_duration_s": 23251,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T22:00:46+00:00",
        "end": "2026-04-06T04:28:17+00:00"
    },
    "points_count": {
        "vessel_a": 115,
        "vessel_b": 115
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 297m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 388 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 388 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": 34.70869660000000322952473652549088001251220703125,
            "lon": 33.321882299999998622297425754368305206298828125
        },
        "time_window": {
            "start_ts": "2026-04-05T22:00:46+00:00",
            "end_ts": "2026-04-06T04:28:17+00:00"
        },
        "searched_at": "2026-04-06T04:45:08.936809+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Apr 5, 2026 22:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 121 AIS positions
  • Period: 2026-04-05T22:51:07+00:00 to 2026-04-06T05:27:55+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396.80000000000001136868377216160297393798828125,
    "points_in_zone": 121,
    "first_point": {
        "ts": "2026-04-05T22:51:07+00:00",
        "lat": 34.70775499999999880174073041416704654693603515625,
        "lon": 33.3207000000000022055246517993509769439697265625
    },
    "last_point": {
        "ts": "2026-04-06T05:27:55+00:00",
        "lat": 34.7077416999999996960468706674873828887939453125,
        "lon": 33.32070999999999827423380338586866855621337890625
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 22:00 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 3 meters
  • Data Points: 121 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 2.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 396.80000000000001136868377216160297393798828125,
    "points": 121,
    "centroid": {
        "lat": 34.707750717355366987248999066650867462158203125,
        "lon": 33.32070228429753200316554284654557704925537109375
    },
    "bbox": {
        "min_lat": 34.707729999999997971826815046370029449462890625,
        "min_lon": 33.32068670000000309983079205267131328582763671875,
        "max_lat": 34.707768299999997907434590160846710205078125,
        "max_lon": 33.32072329999999737992766313254833221435546875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 21:03 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 297 meters
  • Average Distance: 301 meters
  • Duration: 6h 34m
  • Period: 2026-04-05T21:51:41+00:00 to 2026-04-06T04:25:46+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 394 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 297m, avg 301m
Duration25/25Duration 394 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 296.8999999999999772626324556767940521240234375,
    "avg_distance_m": 300.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.5,
    "duration_minutes": 394.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23645,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T21:51:41+00:00",
        "end": "2026-04-06T04:25:46+00:00"
    },
    "points_count": {
        "vessel_a": 117,
        "vessel_b": 117
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 297m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 394 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 394 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 21:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 121 AIS positions
  • Period: 2026-04-05T21:51:05+00:00 to 2026-04-06T04:27:07+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 121,
    "first_point": {
        "ts": "2026-04-05T21:51:05+00:00",
        "lat": 34.7077732999999994945028447546064853668212890625,
        "lon": 33.3207000000000022055246517993509769439697265625
    },
    "last_point": {
        "ts": "2026-04-06T04:27:07+00:00",
        "lat": 34.70774829999999866458892938680946826934814453125,
        "lon": 33.32070829999999972415025695227086544036865234375
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 21:00 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 3 meters
  • Data Points: 121 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 2.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 396,
    "points": 121,
    "centroid": {
        "lat": 34.7077534421487570170938852243125438690185546875,
        "lon": 33.32070170578514733961128513328731060028076171875
    },
    "bbox": {
        "min_lat": 34.7077316999999965219103614799678325653076171875,
        "min_lon": 33.32068670000000309983079205267131328582763671875,
        "max_lat": 34.7077732999999994945028447546064853668212890625,
        "max_lon": 33.32072329999999737992766313254833221435546875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 20:03 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 297 meters
  • Average Distance: 301 meters
  • Duration: 6h 24m
  • Period: 2026-04-05T20:54:41+00:00 to 2026-04-06T03:18:41+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 384 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 297m, avg 301m
Duration25/25Duration 384 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 296.8999999999999772626324556767940521240234375,
    "avg_distance_m": 300.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.5,
    "duration_minutes": 384,
    "overlap_duration_s": 23040,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-05T20:54:41+00:00",
        "end": "2026-04-06T03:18:41+00:00"
    },
    "points_count": {
        "vessel_a": 115,
        "vessel_b": 115
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 297m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 384 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 384 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 20:03 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 121 AIS positions
  • Period: 2026-04-05T20:51:04+00:00 to 2026-04-06T03:27:07+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 121,
    "first_point": {
        "ts": "2026-04-05T20:51:04+00:00",
        "lat": 34.70774999999999721467247582040727138519287109375,
        "lon": 33.32070499999999668716554879210889339447021484375
    },
    "last_point": {
        "ts": "2026-04-06T03:27:07+00:00",
        "lat": 34.70774829999999866458892938680946826934814453125,
        "lon": 33.320688300000000481304596178233623504638671875
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 20:03 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 3 meters
  • Data Points: 121 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 2.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 121,
    "centroid": {
        "lat": 34.7077541586776732174257631413638591766357421875,
        "lon": 33.32070170743804027324586058966815471649169921875
    },
    "bbox": {
        "min_lat": 34.7077316999999965219103614799678325653076171875,
        "min_lon": 33.32068670000000309983079205267131328582763671875,
        "max_lat": 34.7077732999999994945028447546064853668212890625,
        "max_lon": 33.32072000000000144837031257338821887969970703125
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 19:03 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 295 meters
  • Average Distance: 301 meters
  • Duration: 6h 30m
  • Period: 2026-04-05T19:33:33+00:00 to 2026-04-06T02:03:37+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 295m, avg 300m) for 390 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 295m, avg 300m
Duration25/25Duration 390 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 295.1000000000000227373675443232059478759765625,
    "avg_distance_m": 300.5,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23404,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T19:33:33+00:00",
        "end": "2026-04-06T02:03:37+00:00"
    },
    "points_count": {
        "vessel_a": 107,
        "vessel_b": 107
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 295m, avg 300m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 390 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 295m, avg 300m) for 390 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 19:03 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 114 AIS positions
  • Period: 2026-04-05T19:42:09+00:00 to 2026-04-06T02:18:07+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 114,
    "first_point": {
        "ts": "2026-04-05T19:42:09+00:00",
        "lat": 34.7077416999999996960468706674873828887939453125,
        "lon": 33.3207000000000022055246517993509769439697265625
    },
    "last_point": {
        "ts": "2026-04-06T02:18:07+00:00",
        "lat": 34.70775499999999880174073041416704654693603515625,
        "lon": 33.3206950000000006184563972055912017822265625
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 19:03 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 3 meters
  • Data Points: 114 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 2.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 396,
    "points": 114,
    "centroid": {
        "lat": 34.70775444385963481863655033521354198455810546875,
        "lon": 33.320703521929857515715411864221096038818359375
    },
    "bbox": {
        "min_lat": 34.7077316999999965219103614799678325653076171875,
        "min_lon": 33.32068670000000309983079205267131328582763671875,
        "max_lat": 34.7077732999999994945028447546064853668212890625,
        "max_lon": 33.32072000000000144837031257338821887969970703125
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 18:06 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 295 meters
  • Average Distance: 301 meters
  • Duration: 6h 33m
  • Period: 2026-04-05T18:51:39+00:00 to 2026-04-06T01:24:41+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 295m, avg 300m) for 393 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 295m, avg 300m
Duration25/25Duration 393 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 295.1000000000000227373675443232059478759765625,
    "avg_distance_m": 300.5,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 393,
    "overlap_duration_s": 23582,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T18:51:39+00:00",
        "end": "2026-04-06T01:24:41+00:00"
    },
    "points_count": {
        "vessel_a": 105,
        "vessel_b": 105
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 295m, avg 300m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 393 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 295m, avg 300m) for 393 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 18:03 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 112 AIS positions
  • Period: 2026-04-05T18:51:08+00:00 to 2026-04-06T01:27:08+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 112,
    "first_point": {
        "ts": "2026-04-05T18:51:08+00:00",
        "lat": 34.70776000000000038880898500792682170867919921875,
        "lon": 33.3206933000000020683728507719933986663818359375
    },
    "last_point": {
        "ts": "2026-04-06T01:27:08+00:00",
        "lat": 34.7077517000000028701833798550069332122802734375,
        "lon": 33.3207000000000022055246517993509769439697265625
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 18:03 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 3 meters
  • Data Points: 112 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 2.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 396,
    "points": 112,
    "centroid": {
        "lat": 34.7077544348214104275029967539012432098388671875,
        "lon": 33.32070333303573050898194196633994579315185546875
    },
    "bbox": {
        "min_lat": 34.7077316999999965219103614799678325653076171875,
        "min_lon": 33.32068170000000151276253745891153812408447265625,
        "max_lat": 34.7077732999999994945028447546064853668212890625,
        "max_lon": 33.32072000000000144837031257338821887969970703125
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 17:09 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 295 meters
  • Average Distance: 301 meters
  • Duration: 6h 33m
  • Period: 2026-04-05T17:51:34+00:00 to 2026-04-06T00:24:37+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 295m, avg 300m) for 393 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 295m, avg 300m
Duration25/25Duration 393 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 295.1000000000000227373675443232059478759765625,
    "avg_distance_m": 300.5,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 393.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23583,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T17:51:34+00:00",
        "end": "2026-04-06T00:24:37+00:00"
    },
    "points_count": {
        "vessel_a": 100,
        "vessel_b": 100
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 295m, avg 300m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 393 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 295m, avg 300m) for 393 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 17:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 107 AIS positions
  • Period: 2026-04-05T17:51:06+00:00 to 2026-04-06T00:27:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 107,
    "first_point": {
        "ts": "2026-04-05T17:51:06+00:00",
        "lat": 34.70776670000000052596078603528439998626708984375,
        "lon": 33.3207000000000022055246517993509769439697265625
    },
    "last_point": {
        "ts": "2026-04-06T00:27:09+00:00",
        "lat": 34.70775499999999880174073041416704654693603515625,
        "lon": 33.32070829999999972415025695227086544036865234375
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 17:00 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 3 meters
  • Data Points: 107 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 2.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 107,
    "centroid": {
        "lat": 34.7077554831775643151559052057564258575439453125,
        "lon": 33.320703144859834310409496538341045379638671875
    },
    "bbox": {
        "min_lat": 34.7077316999999965219103614799678325653076171875,
        "min_lon": 33.32068170000000151276253745891153812408447265625,
        "max_lat": 34.7077732999999994945028447546064853668212890625,
        "max_lon": 33.32071669999999841138560441322624683380126953125
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 16:09 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 295 meters
  • Average Distance: 301 meters
  • Duration: 6h 27m
  • Period: 2026-04-05T16:57:37+00:00 to 2026-04-05T23:24:36+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 295m, avg 301m) for 387 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 295m, avg 301m
Duration25/25Duration 387 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 295.1000000000000227373675443232059478759765625,
    "avg_distance_m": 300.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 387,
    "overlap_duration_s": 23219,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T16:57:37+00:00",
        "end": "2026-04-05T23:24:36+00:00"
    },
    "points_count": {
        "vessel_a": 92,
        "vessel_b": 92
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 295m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 387 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 295m, avg 301m) for 387 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 16:09 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 101 AIS positions
  • Period: 2026-04-05T16:54:08+00:00 to 2026-04-05T23:27:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 101,
    "first_point": {
        "ts": "2026-04-05T16:54:08+00:00",
        "lat": 34.70776169999999893889253144152462482452392578125,
        "lon": 33.32072000000000144837031257338821887969970703125
    },
    "last_point": {
        "ts": "2026-04-05T23:27:09+00:00",
        "lat": 34.70774829999999866458892938680946826934814453125,
        "lon": 33.32070329999999813708200235851109027862548828125
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 16:09 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 3 meters
  • Data Points: 101 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 2.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 393,
    "points": 101,
    "centroid": {
        "lat": 34.70775756039602555347300949506461620330810546875,
        "lon": 33.32070471881188922225192072801291942596435546875
    },
    "bbox": {
        "min_lat": 34.70773669999999810897861607372760772705078125,
        "min_lon": 33.32068170000000151276253745891153812408447265625,
        "max_lat": 34.70778169999999818173819221556186676025390625,
        "max_lon": 33.32072500000000303543856716714799404144287109375
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 15:03 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 295 meters
  • Average Distance: 301 meters
  • Duration: 6h 33m
  • Period: 2026-04-05T15:51:36+00:00 to 2026-04-05T22:24:46+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 295m, avg 301m) for 393 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 295m, avg 301m
Duration25/25Duration 393 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 295.1000000000000227373675443232059478759765625,
    "avg_distance_m": 300.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 393.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 23590,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0,
    "speed_b_std": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T15:51:36+00:00",
        "end": "2026-04-05T22:24:46+00:00"
    },
    "points_count": {
        "vessel_a": 90,
        "vessel_b": 90
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 295m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 393 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 295m, avg 301m) for 393 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 15:03 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 99 AIS positions
  • Period: 2026-04-05T15:51:05+00:00 to 2026-04-05T22:27:05+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 99,
    "first_point": {
        "ts": "2026-04-05T15:51:05+00:00",
        "lat": 34.70777170000000211302904062904417514801025390625,
        "lon": 33.3207000000000022055246517993509769439697265625
    },
    "last_point": {
        "ts": "2026-04-05T22:27:05+00:00",
        "lat": 34.70775330000000025165718398056924343109130859375,
        "lon": 33.3207000000000022055246517993509769439697265625
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 15:03 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 3 meters
  • Data Points: 99 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 396,
    "points": 99,
    "centroid": {
        "lat": 34.70775946767674469128905911929905414581298828125,
        "lon": 33.32070703737374373076818301342427730560302734375
    },
    "bbox": {
        "min_lat": 34.70773669999999810897861607372760772705078125,
        "min_lon": 33.32068170000000151276253745891153812408447265625,
        "max_lat": 34.70778169999999818173819221556186676025390625,
        "max_lon": 33.32074329999999662277332390658557415008544921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 14:00 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 295 meters
  • Average Distance: 301 meters
  • Duration: 6h 30m
  • Period: 2026-04-05T14:33:37+00:00 to 2026-04-05T21:03:37+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 295m, avg 301m) for 390 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 295m, avg 301m
Duration25/25Duration 390 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 295.1000000000000227373675443232059478759765625,
    "avg_distance_m": 300.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 390,
    "overlap_duration_s": 23400,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T14:33:37+00:00",
        "end": "2026-04-05T21:03:37+00:00"
    },
    "points_count": {
        "vessel_a": 81,
        "vessel_b": 81
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 295m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 390 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 295m, avg 301m) for 390 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 14:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 95 AIS positions
  • Period: 2026-04-05T14:51:09+00:00 to 2026-04-05T21:27:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 95,
    "first_point": {
        "ts": "2026-04-05T14:51:09+00:00",
        "lat": 34.70778169999999818173819221556186676025390625,
        "lon": 33.32071499999999986130205797962844371795654296875
    },
    "last_point": {
        "ts": "2026-04-05T21:27:09+00:00",
        "lat": 34.70774829999999866458892938680946826934814453125,
        "lon": 33.32071330000000131121851154603064060211181640625
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 14:00 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 3 meters
  • Data Points: 95 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 396,
    "points": 95,
    "centroid": {
        "lat": 34.7077613221052416747625102289021015167236328125,
        "lon": 33.3207081210526467884847079403698444366455078125
    },
    "bbox": {
        "min_lat": 34.70773669999999810897861607372760772705078125,
        "min_lon": 33.32068170000000151276253745891153812408447265625,
        "max_lat": 34.70778169999999818173819221556186676025390625,
        "max_lon": 33.32074329999999662277332390658557415008544921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 13:03 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 297 meters
  • Average Distance: 301 meters
  • Duration: 6h 30m
  • Period: 2026-04-05T13:51:35+00:00 to 2026-04-05T20:21:38+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 390 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 297m, avg 301m
Duration25/25Duration 390 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 296.8999999999999772626324556767940521240234375,
    "avg_distance_m": 300.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23403,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T13:51:35+00:00",
        "end": "2026-04-05T20:21:38+00:00"
    },
    "points_count": {
        "vessel_a": 81,
        "vessel_b": 81
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 297m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 390 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 297m, avg 301m) for 390 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 13:03 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 90 AIS positions
  • Period: 2026-04-05T13:51:06+00:00 to 2026-04-05T20:27:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 90,
    "first_point": {
        "ts": "2026-04-05T13:51:06+00:00",
        "lat": 34.707778300000001081571099348366260528564453125,
        "lon": 33.3207383000000021411324269138276576995849609375
    },
    "last_point": {
        "ts": "2026-04-05T20:27:09+00:00",
        "lat": 34.70775499999999880174073041416704654693603515625,
        "lon": 33.32070999999999827423380338586866855621337890625
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 13:03 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 6 meters
  • Data Points: 90 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.5,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 90,
    "centroid": {
        "lat": 34.70776597000000407433617510832846164703369140625,
        "lon": 33.3207102200000093716880655847489833831787109375
    },
    "bbox": {
        "min_lat": 34.70773669999999810897861607372760772705078125,
        "min_lon": 33.32068170000000151276253745891153812408447265625,
        "max_lat": 34.7078149999999965302777127362787723541259765625,
        "max_lon": 33.32074329999999662277332390658557415008544921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 12:21 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 298 meters
  • Average Distance: 301 meters
  • Duration: 6h 33m
  • Period: 2026-04-05T12:51:38+00:00 to 2026-04-05T19:24:39+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 298m, avg 301m) for 393 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 298m, avg 301m
Duration25/25Duration 393 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 297.6000000000000227373675443232059478759765625,
    "avg_distance_m": 300.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.5,
    "duration_minutes": 393,
    "overlap_duration_s": 23581,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T12:51:38+00:00",
        "end": "2026-04-05T19:24:39+00:00"
    },
    "points_count": {
        "vessel_a": 78,
        "vessel_b": 78
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 298m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 393 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 298m, avg 301m) for 393 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 12:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 95 AIS positions
  • Period: 2026-04-05T12:51:07+00:00 to 2026-04-05T19:27:06+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 95,
    "first_point": {
        "ts": "2026-04-05T12:51:07+00:00",
        "lat": 34.70776000000000038880898500792682170867919921875,
        "lon": 33.32074329999999662277332390658557415008544921875
    },
    "last_point": {
        "ts": "2026-04-05T19:27:06+00:00",
        "lat": 34.707768299999997907434590160846710205078125,
        "lon": 33.32070329999999813708200235851109027862548828125
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 12:00 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 5 meters
  • Data Points: 95 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 396,
    "points": 95,
    "centroid": {
        "lat": 34.70776697157894119527554721571505069732666015625,
        "lon": 33.32071547263159772001017699949443340301513671875
    },
    "bbox": {
        "min_lat": 34.70774000000000114596332423388957977294921875,
        "min_lon": 33.32068170000000151276253745891153812408447265625,
        "max_lat": 34.7078149999999965302777127362787723541259765625,
        "max_lon": 33.32075830000000138397808768786489963531494140625
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 11:00 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 298 meters
  • Average Distance: 301 meters
  • Duration: 6h 33m
  • Period: 2026-04-05T11:51:31+00:00 to 2026-04-05T18:24:46+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 298m, avg 301m) for 393 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 298m, avg 301m
Duration25/25Duration 393 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 297.6000000000000227373675443232059478759765625,
    "avg_distance_m": 301,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 393.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 23595,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T11:51:31+00:00",
        "end": "2026-04-05T18:24:46+00:00"
    },
    "points_count": {
        "vessel_a": 71,
        "vessel_b": 71
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 298m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 393 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 298m, avg 301m) for 393 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 11:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 89 AIS positions
  • Period: 2026-04-05T11:51:04+00:00 to 2026-04-05T18:27:06+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 89,
    "first_point": {
        "ts": "2026-04-05T11:51:04+00:00",
        "lat": 34.70777170000000211302904062904417514801025390625,
        "lon": 33.32072000000000144837031257338821887969970703125
    },
    "last_point": {
        "ts": "2026-04-05T18:27:06+00:00",
        "lat": 34.70774999999999721467247582040727138519287109375,
        "lon": 33.32070499999999668716554879210889339447021484375
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 11:00 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 5 meters
  • Data Points: 89 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 396,
    "points": 89,
    "centroid": {
        "lat": 34.70776877078651523333974182605743408203125,
        "lon": 33.3207193820224887303993455134332180023193359375
    },
    "bbox": {
        "min_lat": 34.707746700000001283115125261247158050537109375,
        "min_lon": 33.3206899999999990313881426118314266204833984375,
        "max_lat": 34.7078149999999965302777127362787723541259765625,
        "max_lon": 33.32075830000000138397808768786489963531494140625
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 10:01 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 290 meters
  • Average Distance: 301 meters
  • Duration: 6h 23m
  • Period: 2026-04-05T10:58:33+00:00 to 2026-04-05T17:21:36+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 290m, avg 301m) for 383 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 290m, avg 301m
Duration25/25Duration 383 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 290.3999999999999772626324556767940521240234375,
    "avg_distance_m": 300.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 383.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 22983,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.179999999999999993338661852249060757458209991455078125,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 1.5
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T10:58:33+00:00",
        "end": "2026-04-05T17:21:36+00:00"
    },
    "points_count": {
        "vessel_a": 74,
        "vessel_b": 74
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 290m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 383 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 290m, avg 301m) for 383 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 10:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 26m
  • Data Points: 89 AIS positions
  • Period: 2026-04-05T10:57:06+00:00 to 2026-04-05T17:24:03+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 386.8999999999999772626324556767940521240234375,
    "points_in_zone": 89,
    "first_point": {
        "ts": "2026-04-05T10:57:06+00:00",
        "lat": 34.7078149999999965302777127362787723541259765625,
        "lon": 33.32074329999999662277332390658557415008544921875
    },
    "last_point": {
        "ts": "2026-04-05T17:24:03+00:00",
        "lat": 34.70776000000000038880898500792682170867919921875,
        "lon": 33.32071330000000131121851154603064060211181640625
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 10:00 UTC 75.0% ▼
  • Duration: 6h 26m
  • Radius: 5 meters
  • Data Points: 89 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 386.8999999999999772626324556767940521240234375,
    "points": 89,
    "centroid": {
        "lat": 34.70777371348314233046039589680731296539306640625,
        "lon": 33.3207231280898810155122191645205020904541015625
    },
    "bbox": {
        "min_lat": 34.707746700000001283115125261247158050537109375,
        "min_lon": 33.3206933000000020683728507719933986663818359375,
        "max_lat": 34.7078149999999965302777127362787723541259765625,
        "max_lon": 33.32075830000000138397808768786489963531494140625
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 09:01 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 290 meters
  • Average Distance: 301 meters
  • Duration: 6h 32m
  • Period: 2026-04-05T09:52:06+00:00 to 2026-04-05T16:24:36+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 290m, avg 301m) for 392 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 290m, avg 301m
Duration25/25Duration 392 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 290.3999999999999772626324556767940521240234375,
    "avg_distance_m": 301,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 392.5,
    "overlap_duration_s": 23550,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.1700000000000000122124532708767219446599483489990234375,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 1.5
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T09:52:06+00:00",
        "end": "2026-04-05T16:24:36+00:00"
    },
    "points_count": {
        "vessel_a": 79,
        "vessel_b": 79
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 290m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 392 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 290m, avg 301m) for 392 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 09:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 92 AIS positions
  • Period: 2026-04-05T09:51:04+00:00 to 2026-04-05T16:27:06+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 92,
    "first_point": {
        "ts": "2026-04-05T09:51:04+00:00",
        "lat": 34.7077900000000028057911549694836139678955078125,
        "lon": 33.320701700000000755608198232948780059814453125
    },
    "last_point": {
        "ts": "2026-04-05T16:27:06+00:00",
        "lat": 34.70776500000000197587723960168659687042236328125,
        "lon": 33.32071499999999986130205797962844371795654296875
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 09:00 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 5 meters
  • Data Points: 92 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 396,
    "points": 92,
    "centroid": {
        "lat": 34.7077789163043490816562552936375141143798828125,
        "lon": 33.32072411413043511174691957421600818634033203125
    },
    "bbox": {
        "min_lat": 34.707746700000001283115125261247158050537109375,
        "min_lon": 33.32069829999999655001374776475131511688232421875,
        "max_lat": 34.7078149999999965302777127362787723541259765625,
        "max_lon": 33.32075830000000138397808768786489963531494140625
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 08:04 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 290 meters
  • Average Distance: 301 meters
  • Duration: 6h 32m
  • Period: 2026-04-05T08:52:01+00:00 to 2026-04-05T15:24:34+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 290m, avg 301m) for 393 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 290m, avg 301m
Duration25/25Duration 393 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 290.3999999999999772626324556767940521240234375,
    "avg_distance_m": 301.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 392.6000000000000227373675443232059478759765625,
    "overlap_duration_s": 23553,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.1700000000000000122124532708767219446599483489990234375,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 1.5
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T08:52:01+00:00",
        "end": "2026-04-05T15:24:34+00:00"
    },
    "points_count": {
        "vessel_a": 79,
        "vessel_b": 79
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 290m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 393 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 290m, avg 301m) for 393 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 08:03 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 35m
  • Data Points: 93 AIS positions
  • Period: 2026-04-05T08:51:08+00:00 to 2026-04-05T15:27:05+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 395.8999999999999772626324556767940521240234375,
    "points_in_zone": 93,
    "first_point": {
        "ts": "2026-04-05T08:51:08+00:00",
        "lat": 34.70775330000000025165718398056924343109130859375,
        "lon": 33.32071169999999682431734981946647167205810546875
    },
    "last_point": {
        "ts": "2026-04-05T15:27:05+00:00",
        "lat": 34.7077699999999964575181365944445133209228515625,
        "lon": 33.32070499999999668716554879210889339447021484375
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 08:03 UTC 75.0% ▼
  • Duration: 6h 35m
  • Radius: 5 meters
  • Data Points: 93 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 395.8999999999999772626324556767940521240234375,
    "points": 93,
    "centroid": {
        "lat": 34.70777969892473180379965924657881259918212890625,
        "lon": 33.3207228709677423239554627798497676849365234375
    },
    "bbox": {
        "min_lat": 34.707746700000001283115125261247158050537109375,
        "min_lon": 33.32069829999999655001374776475131511688232421875,
        "max_lat": 34.7078149999999965302777127362787723541259765625,
        "max_lon": 33.32075830000000138397808768786489963531494140625
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 07:04 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 290 meters
  • Average Distance: 301 meters
  • Duration: 6h 26m
  • Period: 2026-04-05T07:52:06+00:00 to 2026-04-05T14:18:37+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 290m, avg 301m) for 386 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 290m, avg 301m
Duration25/25Duration 386 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 290.3999999999999772626324556767940521240234375,
    "avg_distance_m": 301.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 386.5,
    "overlap_duration_s": 23191,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.1600000000000000033306690738754696212708950042724609375,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 1.5
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T07:52:06+00:00",
        "end": "2026-04-05T14:18:37+00:00"
    },
    "points_count": {
        "vessel_a": 86,
        "vessel_b": 86
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 290m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 386 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 290m, avg 301m) for 386 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 07:03 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 96 AIS positions
  • Period: 2026-04-05T07:51:04+00:00 to 2026-04-05T14:21:02+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 390,
    "points_in_zone": 96,
    "first_point": {
        "ts": "2026-04-05T07:51:04+00:00",
        "lat": 34.70774329999999707752067479304969310760498046875,
        "lon": 33.32071169999999682431734981946647167205810546875
    },
    "last_point": {
        "ts": "2026-04-05T14:21:02+00:00",
        "lat": 34.70778169999999818173819221556186676025390625,
        "lon": 33.32072500000000303543856716714799404144287109375
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 07:03 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 5 meters
  • Data Points: 96 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 390,
    "points": 96,
    "centroid": {
        "lat": 34.70777649687499177844074438326060771942138671875,
        "lon": 33.3207225041666532661110977642238140106201171875
    },
    "bbox": {
        "min_lat": 34.70774329999999707752067479304969310760498046875,
        "min_lon": 33.32069829999999655001374776475131511688232421875,
        "max_lat": 34.7078149999999965302777127362787723541259765625,
        "max_lon": 33.32075830000000138397808768786489963531494140625
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Sts Istanbul Black Sea Surveillance Zone
Apr 5, 2026 06:26 UTC 85/100 ▼
Vessel A: IMO 9383962 (EASTERLY JUPITER) Marshall Is
Vessel B: IMO 9396672 (FAIR STAR) LIBERIA
  • Minimum Distance: 290 meters
  • Average Distance: 301 meters
  • Duration: 6h 32m
  • Period: 2026-04-05T06:31:29+00:00 to 2026-04-05T13:03:38+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 290m, avg 301m) for 392 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 290m, avg 301m
Duration25/25Duration 392 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010209,
        "imo": 9383962,
        "name": "EASTERLY JUPITER",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 636022971,
        "imo": 9396672,
        "name": "FAIR STAR",
        "flag": "LIBERIA"
    },
    "min_distance_m": 290.3999999999999772626324556767940521240234375,
    "avg_distance_m": 301.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 392.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23529,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 1.5
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-04-05T06:31:29+00:00",
        "end": "2026-04-05T13:03:38+00:00"
    },
    "points_count": {
        "vessel_a": 99,
        "vessel_b": 99
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 290m, avg 301m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 392 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "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 (EASTERLY JUPITER and FAIR STAR) maintained close proximity (min 290m, avg 301m) for 392 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 Istanbul Black Sea Surveillance Zone
Apr 5, 2026 06:00 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 95 AIS positions
  • Period: 2026-04-05T06:51:05+00:00 to 2026-04-05T13:24:09+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393.1000000000000227373675443232059478759765625,
    "points_in_zone": 95,
    "first_point": {
        "ts": "2026-04-05T06:51:05+00:00",
        "lat": 34.70774829999999866458892938680946826934814453125,
        "lon": 33.32071169999999682431734981946647167205810546875
    },
    "last_point": {
        "ts": "2026-04-05T13:24:09+00:00",
        "lat": 34.70776169999999893889253144152462482452392578125,
        "lon": 33.3207349999999991041477187536656856536865234375
    }
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 06:00 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 5 meters
  • Data Points: 95 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 393.1000000000000227373675443232059478759765625,
    "points": 95,
    "centroid": {
        "lat": 34.70777245894736751097298110835254192352294921875,
        "lon": 33.3207199894736589840249507687985897064208984375
    },
    "bbox": {
        "min_lat": 34.7077282999999994217432686127722263336181640625,
        "min_lon": 33.32069829999999655001374776475131511688232421875,
        "max_lat": 34.7078149999999965302777127362787723541259765625,
        "max_lon": 33.32075830000000138397808768786489963531494140625
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Loiter Istanbul Black Sea Surveillance Zone
Apr 5, 2026 05:13 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 6 meters
  • Data Points: 99 AIS positions
  • Centroid: 34.7078, 33.3207
  • Zone: Istanbul Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.5,
    "duration_minutes": 396,
    "points": 99,
    "centroid": {
        "lat": 34.7077701202020278969939681701362133026123046875,
        "lon": 33.32071715959595081812949501909315586090087890625
    },
    "bbox": {
        "min_lat": 34.7077282999999994217432686127722263336181640625,
        "min_lon": 33.32069829999999655001374776475131511688232421875,
        "max_lat": 34.7078149999999965302777127362787723541259765625,
        "max_lon": 33.32074329999999662277332390658557415008544921875
    },
    "zone_id": "discovered_029"
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Apr 5, 2026 05:01 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 99 AIS positions
  • Period: 2026-04-05T05:51:04+00:00 to 2026-04-05T12:27:03+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 99,
    "first_point": {
        "ts": "2026-04-05T05:51:04+00:00",
        "lat": 34.70775499999999880174073041416704654693603515625,
        "lon": 33.32071669999999841138560441322624683380126953125
    },
    "last_point": {
        "ts": "2026-04-05T12:27:03+00:00",
        "lat": 34.7077766999999965946699376218020915985107421875,
        "lon": 33.32072329999999737992766313254833221435546875
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Apr 5, 2026 04:01 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 6h 28m
  • Data Points: 111 AIS positions
  • Period: 2026-04-05T04:52:49+00:00 to 2026-04-05T11:20:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 388.19999999999998863131622783839702606201171875,
    "points_in_zone": 111,
    "first_point": {
        "ts": "2026-04-05T04:52:49+00:00",
        "lat": 34.6770216999999973950252751819789409637451171875,
        "lon": 33.33751500000000334011929226107895374298095703125
    },
    "last_point": {
        "ts": "2026-04-05T11:20:59+00:00",
        "lat": 34.70780169999999742458385298959910869598388671875,
        "lon": 33.32073669999999765423126518726348876953125
    }
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Aug 26 00:13 49.6899 -4.2338 8.9 kn 90.7° Central Russian Monitoring Zone
Aug 26 00:08 49.6921 -4.2552 8.9 kn 107.9° Central Russian Monitoring Zone
Aug 26 00:06 49.6933 -4.2607 8.9 kn 110.0° Central Russian Monitoring Zone
Aug 26 00:02 49.6970 -4.2750 8.9 kn 108.8° Central Russian Monitoring Zone
Aug 25 23:28 49.6898 -4.4073 8.8 kn 81.5° Central Russian Monitoring Zone
Jul 30 04:52 32.4574 30.6641 11.8 kn 281.9° discovered_025
Jul 30 04:50 32.4565 30.6692 11.8 kn 281.9° discovered_025
Jul 30 04:11 32.4302 30.8170 11.6 kn 281.8° discovered_025
Jul 30 03:22 32.3976 31.0004 11.5 kn 282.0° discovered_025
Jul 30 03:20 32.3963 31.0078 11.5 kn 281.8° discovered_025
Jul 30 03:19 32.3957 31.0115 11.5 kn 281.5° discovered_025
Jul 30 03:16 32.3939 31.0214 11.4 kn 281.7° discovered_025
Jul 30 03:15 32.3932 31.0257 11.4 kn 281.5° discovered_025
Jul 30 03:12 32.3908 31.0392 11.4 kn 281.5° discovered_025
Jul 30 03:11 32.3902 31.0428 11.4 kn 281.7° discovered_025
Jul 30 03:09 32.3895 31.0472 11.3 kn 281.1° discovered_025
Jul 30 03:08 32.3889 31.0508 11.3 kn 281.5° discovered_025
Jul 30 03:05 32.3870 31.0618 11.3 kn 281.4° discovered_025
Jul 30 03:03 32.3857 31.0691 11.3 kn 283.4° discovered_025
Jul 30 03:02 32.3848 31.0735 11.3 kn 284.8° discovered_025

Showing 20 of 65 recent positions.

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.