PURITY

IMO 9325348

Vessel information

Vessel Name PURITY
IMO Number 9325348
MMSI 352004909
Vessel Type Tanker
Flag 🇵🇦 PANAMA
Call Sign 3E7132
Length 180 m
Beam 32 m

Detected Events (100)

Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 16:02 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 1h 41m
  • Data Points: 15 AIS positions
  • Period: 2026-10-26T16:02:28+00:00 to 2026-10-26T17:43:29+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 101,
    "points_in_zone": 15,
    "first_point": {
        "ts": "2026-10-26T16:02:28+00:00",
        "lat": 34.7058999999999997498889570124447345733642578125,
        "lon": 33.3375716999999980316715664230287075042724609375
    },
    "last_point": {
        "ts": "2026-10-26T17:43:29+00:00",
        "lat": 34.5603382999999979574567987583577632904052734375,
        "lon": 33.69955999999999818328433320857584476470947265625
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 26, 2026 15:13 UTC 57/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9351634 (ZONDAR) Marshall Is
  • Minimum Distance: 313 meters
  • Average Distance: 319 meters
  • Duration: 33 minutes
  • Period: 2026-10-26T15:13:33+00:00 to 2026-10-26T15:46:34+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 57/100

Low-confidence STS candidate - may warrant review. Two tankers (PURITY and ZONDAR) maintained close proximity (min 313m, avg 319m) for 33 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 313m, avg 319m
Duration5/25Duration 33 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±10m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T21:15:01.508902+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 312.6000000000000227373675443232059478759765625,
    "avg_distance_m": 318.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 10.5,
    "duration_minutes": 33,
    "overlap_duration_s": 1981,
    "speed_a_avg": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_a_std": 0.39000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.2300000000000000099920072216264088638126850128173828125,
            "max_sog": 0.8000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T15:13:33+00:00",
        "end": "2026-10-26T15:46:34+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 57,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 319m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 33 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Low-confidence STS candidate - may warrant review. Two tankers (PURITY and ZONDAR) maintained close proximity (min 313m, avg 319m) for 33 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70871559999999789170033182017505168914794921875,
            "lon": 33.321848799999997936538420617580413818359375
        },
        "time_window": {
            "start_ts": "2026-10-26T15:13:33+00:00",
            "end_ts": "2026-10-26T15:46:34+00:00"
        },
        "searched_at": "2026-10-26T21:15:01.508902+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 15:13 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 2h 29m
  • Data Points: 21 AIS positions
  • Period: 2026-10-26T15:13:33+00:00 to 2026-10-26T17:43:29+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 149.900000000000005684341886080801486968994140625,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-10-26T15:13:33+00:00",
        "lat": 34.70969170000000048048605094663798809051513671875,
        "lon": 33.32305999999999812644091434776782989501953125
    },
    "last_point": {
        "ts": "2026-10-26T17:43:29+00:00",
        "lat": 34.5603382999999979574567987583577632904052734375,
        "lon": 33.69955999999999818328433320857584476470947265625
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 14:34 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 3h 8m
  • Data Points: 23 AIS positions
  • Period: 2026-10-26T14:34:32+00:00 to 2026-10-26T17:43:29+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 188.900000000000005684341886080801486968994140625,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-10-26T14:34:32+00:00",
        "lat": 34.70968669999999889341779635287821292877197265625,
        "lon": 33.3230549999999965393726597540080547332763671875
    },
    "last_point": {
        "ts": "2026-10-26T17:43:29+00:00",
        "lat": 34.5603382999999979574567987583577632904052734375,
        "lon": 33.69955999999999818328433320857584476470947265625
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 26, 2026 14:25 UTC 67/100 ▼
Vessel A: IMO 9396787 (HARBIYE) PANAMA
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 326 meters
  • Average Distance: 332 meters
  • Duration: 1h 20m
  • Period: 2026-10-26T14:25:43+00:00 to 2026-10-26T15:46:34+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 67/100

Moderate-confidence STS candidate. Two tankers (HARBIYE and PURITY) maintained close proximity (min 326m, avg 332m) for 81 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 326m, avg 332m
Duration15/25Duration 81 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±12m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T20:30:01.719743+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 326,
    "avg_distance_m": 332.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 11.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 80.7999999999999971578290569595992565155029296875,
    "overlap_duration_s": 4851,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.13000000000000000444089209850062616169452667236328125,
    "speed_b_std": 0.330000000000000015543122344752191565930843353271484375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.13000000000000000444089209850062616169452667236328125,
            "max_sog": 0.8000000000000000444089209850062616169452667236328125
        }
    },
    "time_window": {
        "start": "2026-10-26T14:25:43+00:00",
        "end": "2026-10-26T15:46:34+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 67,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 326m, avg 332m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 81 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b112m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (HARBIYE and PURITY) maintained close proximity (min 326m, avg 332m) for 81 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7089414000000004989487933926284313201904296875,
            "lon": 33.32153790000000270765667664818465709686279296875
        },
        "time_window": {
            "start_ts": "2026-10-26T14:25:43+00:00",
            "end_ts": "2026-10-26T15:46:34+00:00"
        },
        "searched_at": "2026-10-26T20:30:01.719743+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 13:37 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 4h 5m
  • Data Points: 25 AIS positions
  • Period: 2026-10-26T13:37:33+00:00 to 2026-10-26T17:43:29+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 245.900000000000005684341886080801486968994140625,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-10-26T13:37:33+00:00",
        "lat": 34.7097049999999995861799106933176517486572265625,
        "lon": 33.323053299999997989289113320410251617431640625
    },
    "last_point": {
        "ts": "2026-10-26T17:43:29+00:00",
        "lat": 34.5603382999999979574567987583577632904052734375,
        "lon": 33.69955999999999818328433320857584476470947265625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 26, 2026 13:37 UTC 75.0% ▼
  • Duration: 2h 21m
  • Radius: 776 meters
  • Data Points: 10 AIS positions
  • Centroid: 34.7095, 33.3245
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 776.3999999999999772626324556767940521240234375,
    "duration_minutes": 141.80000000000001136868377216160297393798828125,
    "points": 10,
    "centroid": {
        "lat": 34.7094708500000024287146516144275665283203125,
        "lon": 33.3244605000000007066773832775652408599853515625
    },
    "bbox": {
        "min_lat": 34.70779999999999887450030655600130558013916015625,
        "min_lon": 33.32305170000000060781530919484794139862060546875,
        "max_lat": 34.709706699999998136263457126915454864501953125,
        "max_lon": 33.3326899999999994861354934982955455780029296875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 26, 2026 13:31 UTC 80/100 ▼
Vessel A: IMO 9396787 (HARBIYE) PANAMA
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 326 meters
  • Average Distance: 331 meters
  • Duration: 2h 14m
  • Period: 2026-10-26T13:31:37+00:00 to 2026-10-26T15:46:34+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (HARBIYE and PURITY) maintained close proximity (min 326m, avg 331m) for 135 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 326m, avg 331m
Duration25/25Duration 135 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 326,
    "avg_distance_m": 331.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 9.300000000000000710542735760100185871124267578125,
    "duration_minutes": 134.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 8097,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_std": 0.270000000000000017763568394002504646778106689453125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 0.8000000000000000444089209850062616169452667236328125
        }
    },
    "time_window": {
        "start": "2026-10-26T13:31:37+00:00",
        "end": "2026-10-26T15:46:34+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 326m, avg 331m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 135 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HARBIYE and PURITY) maintained close proximity (min 326m, avg 331m) for 135 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 26, 2026 12:49 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9351634 (ZONDAR) Marshall Is
  • Minimum Distance: 313 meters
  • Average Distance: 316 meters
  • Duration: 2h 57m
  • Period: 2026-10-26T12:49:30+00:00 to 2026-10-26T15:46:34+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 313m, avg 316m) for 177 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 313m, avg 316m
Duration25/25Duration 177 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±7m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 312.6000000000000227373675443232059478759765625,
    "avg_distance_m": 316,
    "distance_consistency_m": 6.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 177.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 10624,
    "speed_a_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.2600000000000000088817841970012523233890533447265625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.8000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T12:49:30+00:00",
        "end": "2026-10-26T15:46:34+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 316m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 177 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 313m, avg 316m) for 177 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 12:22 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 5h 20m
  • Data Points: 28 AIS positions
  • Period: 2026-10-26T12:22:32+00:00 to 2026-10-26T17:43:29+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 320.8999999999999772626324556767940521240234375,
    "points_in_zone": 28,
    "first_point": {
        "ts": "2026-10-26T12:22:32+00:00",
        "lat": 34.7097116999999997233317117206752300262451171875,
        "lon": 33.3230549999999965393726597540080547332763671875
    },
    "last_point": {
        "ts": "2026-10-26T17:43:29+00:00",
        "lat": 34.5603382999999979574567987583577632904052734375,
        "lon": 33.69955999999999818328433320857584476470947265625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 26, 2026 12:22 UTC 75.0% ▼
  • Duration: 3h 36m
  • Radius: 807 meters
  • Data Points: 13 AIS positions
  • Centroid: 34.7095, 33.3241
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 806.5,
    "duration_minutes": 216.80000000000001136868377216160297393798828125,
    "points": 13,
    "centroid": {
        "lat": 34.709524761538460779775050468742847442626953125,
        "lon": 33.3241373076923110829739016480743885040283203125
    },
    "bbox": {
        "min_lat": 34.70779999999999887450030655600130558013916015625,
        "min_lon": 33.32305170000000060781530919484794139862060546875,
        "max_lat": 34.7097116999999997233317117206752300262451171875,
        "max_lon": 33.3326899999999994861354934982955455780029296875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 26, 2026 10:07 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9396787 (HARBIYE) PANAMA
  • Minimum Distance: 325 meters
  • Average Distance: 329 meters
  • Duration: 2h 15m
  • Period: 2026-10-26T10:07:33+00:00 to 2026-10-26T12:22:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 325m, avg 329m) for 135 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 325m, avg 329m
Duration25/25Duration 135 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T16:15:01.987966+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "min_distance_m": 325,
    "avg_distance_m": 328.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 3.5,
    "duration_minutes": 135,
    "overlap_duration_s": 8099,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T10:07:33+00:00",
        "end": "2026-10-26T12:22:32+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 325m, avg 329m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 135 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 325m, avg 329m) for 135 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.708972799999997960185282863676548004150390625,
            "lon": 33.3215071999999992158336681313812732696533203125
        },
        "time_window": {
            "start_ts": "2026-10-26T10:07:33+00:00",
            "end_ts": "2026-10-26T12:22:32+00:00"
        },
        "searched_at": "2026-10-26T16:15:01.987966+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 10:07 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 19m
  • Data Points: 25 AIS positions
  • Period: 2026-10-26T10:46:30+00:00 to 2026-10-26T17:05:49+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 379.30000000000001136868377216160297393798828125,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-10-26T10:46:30+00:00",
        "lat": 34.70969000000000193040250451304018497467041015625,
        "lon": 33.32309670000000068057488533668220043182373046875
    },
    "last_point": {
        "ts": "2026-10-26T17:05:49+00:00",
        "lat": 34.6183582999999970297722029499709606170654296875,
        "lon": 33.55784330000000181826180778443813323974609375
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 26, 2026 10:07 UTC 75.0% ▼
  • Duration: 5h 51m
  • Radius: 820 meters
  • Data Points: 15 AIS positions
  • Centroid: 34.7095, 33.3240
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 819.700000000000045474735088646411895751953125,
    "duration_minutes": 351.80000000000001136868377216160297393798828125,
    "points": 15,
    "centroid": {
        "lat": 34.7095471266666635301589849404990673065185546875,
        "lon": 33.3239964466666691578211612068116664886474609375
    },
    "bbox": {
        "min_lat": 34.70779999999999887450030655600130558013916015625,
        "min_lon": 33.32305170000000060781530919484794139862060546875,
        "max_lat": 34.7097116999999997233317117206752300262451171875,
        "max_lon": 33.3326899999999994861354934982955455780029296875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 26, 2026 09:43 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9396787 (HARBIYE) PANAMA
  • Minimum Distance: 325 meters
  • Average Distance: 330 meters
  • Duration: 2h 39m
  • Period: 2026-10-26T09:43:31+00:00 to 2026-10-26T12:22:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 325m, avg 330m) for 159 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 325m, avg 330m
Duration25/25Duration 159 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "min_distance_m": 325,
    "avg_distance_m": 329.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 159,
    "overlap_duration_s": 9541,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T09:43:31+00:00",
        "end": "2026-10-26T12:22:32+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 325m, avg 330m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 159 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 325m, avg 330m) for 159 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 09:13 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 20 AIS positions
  • Period: 2026-10-26T09:52:30+00:00 to 2026-10-26T16:29:08+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 396.6000000000000227373675443232059478759765625,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-10-26T09:52:30+00:00",
        "lat": 34.70969000000000193040250451304018497467041015625,
        "lon": 33.32309670000000068057488533668220043182373046875
    },
    "last_point": {
        "ts": "2026-10-26T16:29:08+00:00",
        "lat": 34.67492829999999770507201901637017726898193359375,
        "lon": 33.41962500000000346744855050928890705108642578125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 26, 2026 09:13 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 838 meters
  • Data Points: 19 AIS positions
  • Centroid: 34.7096, 33.3238
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 837.700000000000045474735088646411895751953125,
    "duration_minutes": 384.80000000000001136868377216160297393798828125,
    "points": 19,
    "centroid": {
        "lat": 34.70957606315788979145509074442088603973388671875,
        "lon": 33.32380228421052237308686017058789730072021484375
    },
    "bbox": {
        "min_lat": 34.70779999999999887450030655600130558013916015625,
        "min_lon": 33.32305170000000060781530919484794139862060546875,
        "max_lat": 34.7097116999999997233317117206752300262451171875,
        "max_lon": 33.3326899999999994861354934982955455780029296875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 26, 2026 09:12 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9351634 (ZONDAR) Marshall Is
  • Minimum Distance: 313 meters
  • Average Distance: 315 meters
  • Duration: 2h 39m
  • Period: 2026-10-26T09:43:31+00:00 to 2026-10-26T12:22:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 313m, avg 315m) for 159 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 313m, avg 315m
Duration25/25Duration 159 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 312.80000000000001136868377216160297393798828125,
    "avg_distance_m": 314.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 159,
    "overlap_duration_s": 9541,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T09:43:31+00:00",
        "end": "2026-10-26T12:22:32+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 315m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 159 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 313m, avg 315m) for 159 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 26, 2026 09:00 UTC 85/100 ▼
Vessel A: IMO 9800790 (HISTRIA ATLAS) Liberia
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 72 meters
  • Average Distance: 74 meters
  • Duration: 1h 3m
  • Period: 2026-10-26T09:00:10+00:00 to 2026-10-26T10:03:08+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (HISTRIA ATLAS and PURITY) maintained close proximity (min 72m, avg 74m) for 63 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 72m, avg 74m
Duration15/25Duration 63 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T15:15:09.033015+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636019212,
        "imo": 9800790,
        "name": "HISTRIA ATLAS",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 72,
    "avg_distance_m": 73.7000000000000028421709430404007434844970703125,
    "distance_consistency_m": 2.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 63,
    "overlap_duration_s": 3778,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T09:00:10+00:00",
        "end": "2026-10-26T10:03:08+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 72m, avg 74m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 63 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HISTRIA ATLAS and PURITY) maintained close proximity (min 72m, avg 74m) for 63 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70988539999999744622982689179480075836181640625,
            "lon": 33.32274000000000313548298436217010021209716796875
        },
        "time_window": {
            "start_ts": "2026-10-26T09:00:10+00:00",
            "end_ts": "2026-10-26T10:03:08+00:00"
        },
        "searched_at": "2026-10-26T15:15:09.033015+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 26, 2026 08:30 UTC 90/100 ▼
Vessel A: IMO 9800790 (HISTRIA ATLAS) Liberia
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 72 meters
  • Average Distance: 74 meters
  • Duration: 1h 33m
  • Period: 2026-10-26T08:30:11+00:00 to 2026-10-26T10:03:08+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (HISTRIA ATLAS and PURITY) maintained close proximity (min 72m, avg 74m) for 93 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 72m, avg 74m
Duration20/25Duration 93 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T12:45:04.786568+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636019212,
        "imo": 9800790,
        "name": "HISTRIA ATLAS",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 72,
    "avg_distance_m": 74,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 93,
    "overlap_duration_s": 5577,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T08:30:11+00:00",
        "end": "2026-10-26T10:03:08+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 72m, avg 74m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 93 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HISTRIA ATLAS and PURITY) maintained close proximity (min 72m, avg 74m) for 93 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70989139999999650854078936390578746795654296875,
            "lon": 33.3227418999999969173586578108370304107666015625
        },
        "time_window": {
            "start_ts": "2026-10-26T08:30:11+00:00",
            "end_ts": "2026-10-26T10:03:08+00:00"
        },
        "searched_at": "2026-10-26T12:45:04.786568+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 26, 2026 08:28 UTC 75/100 ▼
Vessel A: IMO 9396787 (HARBIYE) PANAMA
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 328 meters
  • Average Distance: 330 meters
  • Duration: 1h 45m
  • Period: 2026-10-26T08:28:34+00:00 to 2026-10-26T10:13:38+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (HARBIYE and PURITY) maintained close proximity (min 328m, avg 330m) for 105 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 328m, avg 330m
Duration20/25Duration 105 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 327.80000000000001136868377216160297393798828125,
    "avg_distance_m": 329.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 105.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 6304,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T08:28:34+00:00",
        "end": "2026-10-26T10:13:38+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 328m, avg 330m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 105 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (HARBIYE and PURITY) maintained close proximity (min 328m, avg 330m) for 105 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 08:28 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 19 AIS positions
  • Period: 2026-10-26T08:43:30+00:00 to 2026-10-26T15:16:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-10-26T08:43:30+00:00",
        "lat": 34.7096982999999994490281096659600734710693359375,
        "lon": 33.3230616999999966765244607813656330108642578125
    },
    "last_point": {
        "ts": "2026-10-26T15:16:32+00:00",
        "lat": 34.70969170000000048048605094663798809051513671875,
        "lon": 33.32305170000000060781530919484794139862060546875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 26, 2026 08:28 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 3 meters
  • Data Points: 19 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3,
    "duration_minutes": 393,
    "points": 19,
    "centroid": {
        "lat": 34.709692810526320272401790134608745574951171875,
        "lon": 33.32306394736840360337737365625798702239990234375
    },
    "bbox": {
        "min_lat": 34.70967329999999861911419429816305637359619140625,
        "min_lon": 33.32305170000000060781530919484794139862060546875,
        "max_lat": 34.7097116999999997233317117206752300262451171875,
        "max_lon": 33.32309670000000068057488533668220043182373046875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 26, 2026 08:21 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9351634 (ZONDAR) Marshall Is
  • Minimum Distance: 313 meters
  • Average Distance: 315 meters
  • Duration: 3h 30m
  • Period: 2026-10-26T08:52:32+00:00 to 2026-10-26T12:22:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 313m, avg 314m) for 210 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 313m, avg 314m
Duration25/25Duration 210 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 312.80000000000001136868377216160297393798828125,
    "avg_distance_m": 314.5,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 210,
    "overlap_duration_s": 12600,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T08:52:32+00:00",
        "end": "2026-10-26T12:22:32+00:00"
    },
    "points_count": {
        "vessel_a": 10,
        "vessel_b": 10
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 314m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 210 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 313m, avg 314m) for 210 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 26, 2026 07:43 UTC 75/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9396787 (HARBIYE) PANAMA
  • Minimum Distance: 328 meters
  • Average Distance: 328 meters
  • Duration: 1h 30m
  • Period: 2026-10-26T07:43:30+00:00 to 2026-10-26T09:13:30+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 328m, avg 328m) for 90 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 328m, avg 328m
Duration20/25Duration 90 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±0m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "min_distance_m": 327.80000000000001136868377216160297393798828125,
    "avg_distance_m": 328.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 0.299999999999999988897769753748434595763683319091796875,
    "duration_minutes": 90,
    "overlap_duration_s": 5400,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T07:43:30+00:00",
        "end": "2026-10-26T09:13:30+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 328m, avg 328m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 90 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b10m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 328m, avg 328m) for 90 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 26, 2026 07:43 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9800790 (HISTRIA ATLAS) Liberia
  • Minimum Distance: 74 meters
  • Average Distance: 76 meters
  • Duration: 45 minutes
  • Period: 2026-10-26T07:43:30+00:00 to 2026-10-26T08:28:28+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and HISTRIA ATLAS) maintained close proximity (min 74m, avg 76m) for 45 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 74m, avg 76m
Duration10/25Duration 45 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T09:00:07.171966+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 636019212,
        "imo": 9800790,
        "name": "HISTRIA ATLAS",
        "flag": "Liberia"
    },
    "min_distance_m": 74.400000000000005684341886080801486968994140625,
    "avg_distance_m": 75.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 45,
    "overlap_duration_s": 2698,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-26T07:43:30+00:00",
        "end": "2026-10-26T08:28:28+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 74m, avg 76m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 45 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and HISTRIA ATLAS) maintained close proximity (min 74m, avg 76m) for 45 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70989709999999917044988251291215419769287109375,
            "lon": 33.322732500000000754880602471530437469482421875
        },
        "time_window": {
            "start_ts": "2026-10-26T07:43:30+00:00",
            "end_ts": "2026-10-26T08:28:28+00:00"
        },
        "searched_at": "2026-10-26T09:00:07.171966+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 07:04 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 9m
  • Data Points: 17 AIS positions
  • Period: 2026-10-26T07:43:30+00:00 to 2026-10-26T13:52:29+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 369,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-10-26T07:43:30+00:00",
        "lat": 34.70968830000000338031895807944238185882568359375,
        "lon": 33.32306330000000116342562250792980194091796875
    },
    "last_point": {
        "ts": "2026-10-26T13:52:29+00:00",
        "lat": 34.709706699999998136263457126915454864501953125,
        "lon": 33.323053299999997989289113320410251617431640625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 26, 2026 07:04 UTC 75.0% ▼
  • Duration: 6h 9m
  • Radius: 3 meters
  • Data Points: 17 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 2.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 369,
    "points": 17,
    "centroid": {
        "lat": 34.70969440588235244149473146535456180572509765625,
        "lon": 33.32306646470588162856074632145464420318603515625
    },
    "bbox": {
        "min_lat": 34.70967329999999861911419429816305637359619140625,
        "min_lon": 33.323053299999997989289113320410251617431640625,
        "max_lat": 34.7097116999999997233317117206752300262451171875,
        "max_lon": 33.32309670000000068057488533668220043182373046875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 26, 2026 06:04 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9351634 (ZONDAR) Marshall Is
  • Minimum Distance: 313 meters
  • Average Distance: 315 meters
  • Duration: 5h 57m
  • Period: 2026-10-26T06:25:31+00:00 to 2026-10-26T12:22:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 313m, avg 315m) for 357 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 313m, avg 315m
Duration25/25Duration 357 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 312.80000000000001136868377216160297393798828125,
    "avg_distance_m": 314.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.5,
    "duration_minutes": 357,
    "overlap_duration_s": 21421,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T06:25:31+00:00",
        "end": "2026-10-26T12:22:32+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 315m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 357 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 313m, avg 315m) for 357 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 06:04 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 18 AIS positions
  • Period: 2026-10-26T06:25:31+00:00 to 2026-10-26T12:49:30+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 384,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-10-26T06:25:31+00:00",
        "lat": 34.70968669999999889341779635287821292877197265625,
        "lon": 33.3230582999999995763573679141700267791748046875
    },
    "last_point": {
        "ts": "2026-10-26T12:49:30+00:00",
        "lat": 34.7096999999999979991116560995578765869140625,
        "lon": 33.32306330000000116342562250792980194091796875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 26, 2026 06:04 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 4 meters
  • Data Points: 18 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 384,
    "points": 18,
    "centroid": {
        "lat": 34.709694161111116272877552546560764312744140625,
        "lon": 33.3230689777777797644375823438167572021484375
    },
    "bbox": {
        "min_lat": 34.70967329999999861911419429816305637359619140625,
        "min_lon": 33.3230549999999965393726597540080547332763671875,
        "max_lat": 34.7097217000000028974682209081947803497314453125,
        "max_lon": 33.32309670000000068057488533668220043182373046875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 26, 2026 05:45 UTC 65/100 ▼
Vessel A: IMO 9351634 (ZONDAR) Marshall Is
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 313 meters
  • Average Distance: 316 meters
  • Duration: 45 minutes
  • Period: 2026-10-26T05:45:24+00:00 to 2026-10-26T06:30:24+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 313m, avg 316m) for 45 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 313m, avg 316m
Duration10/25Duration 45 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T07:15:02.087183+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 313.19999999999998863131622783839702606201171875,
    "avg_distance_m": 315.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 45,
    "overlap_duration_s": 2700,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T05:45:24+00:00",
        "end": "2026-10-26T06:30:24+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 316m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 45 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 313m, avg 316m) for 45 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70873960000000124637153930962085723876953125,
            "lon": 33.32179690000000249483491643331944942474365234375
        },
        "time_window": {
            "start_ts": "2026-10-26T05:45:24+00:00",
            "end_ts": "2026-10-26T06:30:24+00:00"
        },
        "searched_at": "2026-10-26T07:15:02.087183+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 05:04 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 21 AIS positions
  • Period: 2026-10-26T05:52:32+00:00 to 2026-10-26T12:22:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-10-26T05:52:32+00:00",
        "lat": 34.70969670000000206755430554039776325225830078125,
        "lon": 33.3230683000000027504938771016895771026611328125
    },
    "last_point": {
        "ts": "2026-10-26T12:22:32+00:00",
        "lat": 34.7097116999999997233317117206752300262451171875,
        "lon": 33.3230549999999965393726597540080547332763671875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 26, 2026 05:04 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 4 meters
  • Data Points: 21 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 390,
    "points": 21,
    "centroid": {
        "lat": 34.70969277142857123408248298801481723785400390625,
        "lon": 33.3230688857142780534559278748929500579833984375
    },
    "bbox": {
        "min_lat": 34.709665000000001100488589145243167877197265625,
        "min_lon": 33.32303499999999729652699897997081279754638671875,
        "max_lat": 34.7097217000000028974682209081947803497314453125,
        "max_lon": 33.32309670000000068057488533668220043182373046875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 26, 2026 04:49 UTC 70/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9396787 (HARBIYE) PANAMA
  • Minimum Distance: 326 meters
  • Average Distance: 330 meters
  • Duration: 1h 18m
  • Period: 2026-10-26T04:49:29+00:00 to 2026-10-26T06:07:29+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 326m, avg 330m) for 78 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 326m, avg 330m
Duration15/25Duration 78 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T10:45:03.716562+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "min_distance_m": 326,
    "avg_distance_m": 329.5,
    "distance_consistency_m": 1.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 78,
    "overlap_duration_s": 4680,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T04:49:29+00:00",
        "end": "2026-10-26T06:07:29+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 326m, avg 330m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 78 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 326m, avg 330m) for 78 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7089629999999971232682582922279834747314453125,
            "lon": 33.32150270000000347181412507779896259307861328125
        },
        "time_window": {
            "start_ts": "2026-10-26T04:49:29+00:00",
            "end_ts": "2026-10-26T06:07:29+00:00"
        },
        "searched_at": "2026-10-26T10:45:03.716562+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 26, 2026 04:49 UTC 70/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9351634 (ZONDAR) Marshall Is
  • Minimum Distance: 315 meters
  • Average Distance: 315 meters
  • Duration: 1h 3m
  • Period: 2026-10-26T04:49:29+00:00 to 2026-10-26T05:52:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 315m, avg 315m) for 63 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 315m, avg 315m
Duration15/25Duration 63 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T11:00:02.169854+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 314.69999999999998863131622783839702606201171875,
    "avg_distance_m": 315.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 0.59999999999999997779553950749686919152736663818359375,
    "duration_minutes": 63,
    "overlap_duration_s": 3783,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T04:49:29+00:00",
        "end": "2026-10-26T05:52:32+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 315m, avg 315m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 63 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 315m, avg 315m) for 63 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7087460999999990463038557209074497222900390625,
            "lon": 33.32179719999999889523678575642406940460205078125
        },
        "time_window": {
            "start_ts": "2026-10-26T04:49:29+00:00",
            "end_ts": "2026-10-26T05:52:32+00:00"
        },
        "searched_at": "2026-10-26T11:00:02.169854+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 04:43 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 3m
  • Data Points: 23 AIS positions
  • Period: 2026-10-26T04:43:31+00:00 to 2026-10-26T10:46:30+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 363,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-10-26T04:43:31+00:00",
        "lat": 34.709693299999997861959855072200298309326171875,
        "lon": 33.3230683000000027504938771016895771026611328125
    },
    "last_point": {
        "ts": "2026-10-26T10:46:30+00:00",
        "lat": 34.70969000000000193040250451304018497467041015625,
        "lon": 33.32309670000000068057488533668220043182373046875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 26, 2026 04:43 UTC 75.0% ▼
  • Duration: 6h 3m
  • Radius: 5 meters
  • Data Points: 23 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.5,
    "duration_minutes": 363,
    "points": 23,
    "centroid": {
        "lat": 34.7096932521739205412814044393599033355712890625,
        "lon": 33.32306949130434503558717551641166210174560546875
    },
    "bbox": {
        "min_lat": 34.709665000000001100488589145243167877197265625,
        "min_lon": 33.32303499999999729652699897997081279754638671875,
        "max_lat": 34.7097217000000028974682209081947803497314453125,
        "max_lon": 33.32309670000000068057488533668220043182373046875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 26, 2026 03:19 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9351634 (ZONDAR) Marshall Is
  • Minimum Distance: 312 meters
  • Average Distance: 315 meters
  • Duration: 2h 33m
  • Period: 2026-10-26T03:19:30+00:00 to 2026-10-26T05:52:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 312m, avg 315m) for 153 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 312m, avg 315m
Duration25/25Duration 153 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 312.3999999999999772626324556767940521240234375,
    "avg_distance_m": 314.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.1999999999999999555910790149937383830547332763671875,
    "duration_minutes": 153,
    "overlap_duration_s": 9182,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T03:19:30+00:00",
        "end": "2026-10-26T05:52:32+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 312m, avg 315m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 153 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 312m, avg 315m) for 153 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 26, 2026 03:01 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9396787 (HARBIYE) PANAMA
  • Minimum Distance: 326 meters
  • Average Distance: 329 meters
  • Duration: 3h 6m
  • Period: 2026-10-26T03:01:29+00:00 to 2026-10-26T06:07:29+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 326m, avg 329m) for 186 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 326m, avg 329m
Duration25/25Duration 186 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T09:00:15.467867+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "min_distance_m": 326,
    "avg_distance_m": 329.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 186,
    "overlap_duration_s": 11160,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T03:01:29+00:00",
        "end": "2026-10-26T06:07:29+00:00"
    },
    "points_count": {
        "vessel_a": 14,
        "vessel_b": 14
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 326m, avg 329m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 186 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 326m, avg 329m) for 186 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70896470000000277877916232682764530181884765625,
            "lon": 33.32149940000000043482941691763699054718017578125
        },
        "time_window": {
            "start_ts": "2026-10-26T03:01:29+00:00",
            "end_ts": "2026-10-26T06:07:29+00:00"
        },
        "searched_at": "2026-10-26T09:00:15.467867+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 03:01 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 25 AIS positions
  • Period: 2026-10-26T03:37:32+00:00 to 2026-10-26T10:07:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-10-26T03:37:32+00:00",
        "lat": 34.709710000000001173248165287077426910400390625,
        "lon": 33.3230549999999965393726597540080547332763671875
    },
    "last_point": {
        "ts": "2026-10-26T10:07:33+00:00",
        "lat": 34.70969500000000351747075910679996013641357421875,
        "lon": 33.3230649999999997135091689415276050567626953125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 26, 2026 03:01 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 4 meters
  • Data Points: 25 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 390,
    "points": 25,
    "centroid": {
        "lat": 34.70969426000001334386979578994214534759521484375,
        "lon": 33.32306659599999676402148907072842121124267578125
    },
    "bbox": {
        "min_lat": 34.709665000000001100488589145243167877197265625,
        "min_lon": 33.32303499999999729652699897997081279754638671875,
        "max_lat": 34.7097217000000028974682209081947803497314453125,
        "max_lon": 33.32309670000000068057488533668220043182373046875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 26, 2026 02:55 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9396787 (HARBIYE) PANAMA
  • Minimum Distance: 326 meters
  • Average Distance: 330 meters
  • Duration: 3h 51m
  • Period: 2026-10-26T02:16:31+00:00 to 2026-10-26T06:07:29+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 326m, avg 330m) for 231 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 326m, avg 330m
Duration25/25Duration 231 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "min_distance_m": 326,
    "avg_distance_m": 329.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 231,
    "overlap_duration_s": 13858,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T02:16:31+00:00",
        "end": "2026-10-26T06:07:29+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 326m, avg 330m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 231 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 326m, avg 330m) for 231 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 26, 2026 02:30 UTC 70/100 ▼
Vessel A: IMO 9351634 (ZONDAR) Marshall Is
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 314 meters
  • Average Distance: 316 meters
  • Duration: 1h 12m
  • Period: 2026-10-26T02:30:22+00:00 to 2026-10-26T03:42:21+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 314m, avg 316m) for 72 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 314m, avg 316m
Duration15/25Duration 72 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T08:15:01.675481+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 314.19999999999998863131622783839702606201171875,
    "avg_distance_m": 315.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 72,
    "overlap_duration_s": 4319,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T02:30:22+00:00",
        "end": "2026-10-26T03:42:21+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 314m, avg 316m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 72 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 314m, avg 316m) for 72 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70875190000000287682269117794930934906005859375,
            "lon": 33.3217843999999985271642799489200115203857421875
        },
        "time_window": {
            "start_ts": "2026-10-26T02:30:22+00:00",
            "end_ts": "2026-10-26T03:42:21+00:00"
        },
        "searched_at": "2026-10-26T08:15:01.675481+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 02:13 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 23 AIS positions
  • Period: 2026-10-26T02:25:30+00:00 to 2026-10-26T08:55:30+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-10-26T02:25:30+00:00",
        "lat": 34.70972330000000027894202503375709056854248046875,
        "lon": 33.32305000000000205773176276125013828277587890625
    },
    "last_point": {
        "ts": "2026-10-26T08:55:30+00:00",
        "lat": 34.70968830000000338031895807944238185882568359375,
        "lon": 33.3230683000000027504938771016895771026611328125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 26, 2026 02:13 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 5 meters
  • Data Points: 23 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.5,
    "duration_minutes": 390,
    "points": 23,
    "centroid": {
        "lat": 34.70969709565218863644986413419246673583984375,
        "lon": 33.323064921739131705180625431239604949951171875
    },
    "bbox": {
        "min_lat": 34.709665000000001100488589145243167877197265625,
        "min_lon": 33.32303499999999729652699897997081279754638671875,
        "max_lat": 34.70972330000000027894202503375709056854248046875,
        "max_lon": 33.32309000000000054342308430932462215423583984375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 01:16 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 23 AIS positions
  • Period: 2026-10-26T01:52:30+00:00 to 2026-10-26T08:28:28+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 396,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-10-26T01:52:30+00:00",
        "lat": 34.7096982999999994490281096659600734710693359375,
        "lon": 33.32305170000000060781530919484794139862060546875
    },
    "last_point": {
        "ts": "2026-10-26T08:28:28+00:00",
        "lat": 34.7097049999999995861799106933176517486572265625,
        "lon": 33.32307329999999723213477409444749355316162109375
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 26, 2026 01:16 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 5 meters
  • Data Points: 23 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.5,
    "duration_minutes": 396,
    "points": 23,
    "centroid": {
        "lat": 34.7096977478260981797575368545949459075927734375,
        "lon": 33.32306412608695467270081280730664730072021484375
    },
    "bbox": {
        "min_lat": 34.709665000000001100488589145243167877197265625,
        "min_lon": 33.32303499999999729652699897997081279754638671875,
        "max_lat": 34.70972330000000027894202503375709056854248046875,
        "max_lon": 33.32309000000000054342308430932462215423583984375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 26, 2026 01:04 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9396787 (HARBIYE) PANAMA
  • Minimum Distance: 326 meters
  • Average Distance: 329 meters
  • Duration: 4h 51m
  • Period: 2026-10-26T01:16:31+00:00 to 2026-10-26T06:07:29+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 326m, avg 329m) for 291 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 326m, avg 329m
Duration25/25Duration 291 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "min_distance_m": 326,
    "avg_distance_m": 329.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 291,
    "overlap_duration_s": 17458,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T01:16:31+00:00",
        "end": "2026-10-26T06:07:29+00:00"
    },
    "points_count": {
        "vessel_a": 21,
        "vessel_b": 21
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 326m, avg 329m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 291 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 326m, avg 329m) for 291 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 26, 2026 01:03 UTC 80/100 ▼
Vessel A: IMO 9351634 (ZONDAR) Marshall Is
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 312 meters
  • Average Distance: 315 meters
  • Duration: 2h 38m
  • Period: 2026-10-26T01:03:25+00:00 to 2026-10-26T03:42:21+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 312m, avg 315m) for 159 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 312m, avg 315m
Duration25/25Duration 159 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T07:00:12.417943+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 312.19999999999998863131622783839702606201171875,
    "avg_distance_m": 314.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 158.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 9536,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T01:03:25+00:00",
        "end": "2026-10-26T03:42:21+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 312m, avg 315m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 159 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 312m, avg 315m) for 159 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7087446000000028334397939033806324005126953125,
            "lon": 33.3217815000000001646185410209000110626220703125
        },
        "time_window": {
            "start_ts": "2026-10-26T01:03:25+00:00",
            "end_ts": "2026-10-26T03:42:21+00:00"
        },
        "searched_at": "2026-10-26T07:00:12.417943+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 26, 2026 00:55 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9396787 (HARBIYE) PANAMA
  • Minimum Distance: 326 meters
  • Average Distance: 329 meters
  • Duration: 5h 12m
  • Period: 2026-10-26T00:55:30+00:00 to 2026-10-26T06:07:29+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 326m, avg 329m) for 312 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 326m, avg 329m
Duration25/25Duration 312 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "min_distance_m": 326,
    "avg_distance_m": 329.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 312,
    "overlap_duration_s": 18719,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T00:55:30+00:00",
        "end": "2026-10-26T06:07:29+00:00"
    },
    "points_count": {
        "vessel_a": 23,
        "vessel_b": 23
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 326m, avg 329m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 312 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 326m, avg 329m) for 312 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 26, 2026 00:36 UTC 95/100 ▼
Vessel A: IMO 9800790 (HISTRIA ATLAS) Liberia
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 73 meters
  • Average Distance: 75 meters
  • Duration: 5h 27m
  • Period: 2026-10-26T00:36:08+00:00 to 2026-10-26T06:03:09+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (HISTRIA ATLAS and PURITY) maintained close proximity (min 73m, avg 75m) for 327 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 73m, avg 75m
Duration25/25Duration 327 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T06:15:01.277438+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636019212,
        "imo": 9800790,
        "name": "HISTRIA ATLAS",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 73.099999999999994315658113919198513031005859375,
    "avg_distance_m": 74.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 327,
    "overlap_duration_s": 19621,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T00:36:08+00:00",
        "end": "2026-10-26T06:03:09+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 73m, avg 75m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 327 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HISTRIA ATLAS and PURITY) maintained close proximity (min 73m, avg 75m) for 327 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.709885700000000952059053815901279449462890625,
            "lon": 33.322713800000002493106876499950885772705078125
        },
        "time_window": {
            "start_ts": "2026-10-26T00:36:08+00:00",
            "end_ts": "2026-10-26T06:03:09+00:00"
        },
        "searched_at": "2026-10-26T06:15:01.277438+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 26, 2026 00:01 UTC 60/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9351634 (ZONDAR) Marshall Is
  • Minimum Distance: 313 meters
  • Average Distance: 315 meters
  • Duration: 42 minutes
  • Period: 2026-10-26T00:01:31+00:00 to 2026-10-26T00:43:28+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 313m, avg 314m) for 42 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 313m, avg 314m
Duration5/25Duration 42 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T06:30:12.169984+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 313.30000000000001136868377216160297393798828125,
    "avg_distance_m": 314.5,
    "distance_consistency_m": 1.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 42,
    "overlap_duration_s": 2517,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-26T00:01:31+00:00",
        "end": "2026-10-26T00:43:28+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 314m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 42 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 313m, avg 314m) for 42 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70873830000000026529960450716316699981689453125,
            "lon": 33.321809500000000525687937624752521514892578125
        },
        "time_window": {
            "start_ts": "2026-10-26T00:01:31+00:00",
            "end_ts": "2026-10-26T00:43:28+00:00"
        },
        "searched_at": "2026-10-26T06:30:12.169984+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 26, 2026 00:01 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 29 AIS positions
  • Period: 2026-10-26T00:40:31+00:00 to 2026-10-26T07:04:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 384,
    "points_in_zone": 29,
    "first_point": {
        "ts": "2026-10-26T00:40:31+00:00",
        "lat": 34.70969500000000351747075910679996013641357421875,
        "lon": 33.32305999999999812644091434776782989501953125
    },
    "last_point": {
        "ts": "2026-10-26T07:04:32+00:00",
        "lat": 34.709693299999997861959855072200298309326171875,
        "lon": 33.323070000000001300577423535287380218505859375
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 26, 2026 00:01 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 4 meters
  • Data Points: 29 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 384,
    "points": 29,
    "centroid": {
        "lat": 34.7096956862068992677450296469032764434814453125,
        "lon": 33.32306114482759795691890758462250232696533203125
    },
    "bbox": {
        "min_lat": 34.709665000000001100488589145243167877197265625,
        "min_lon": 33.32303499999999729652699897997081279754638671875,
        "max_lat": 34.70972330000000027894202503375709056854248046875,
        "max_lon": 33.32309000000000054342308430932462215423583984375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 25, 2026 23:36 UTC 90/100 ▼
Vessel A: IMO 9800790 (HISTRIA ATLAS) Liberia
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 73 meters
  • Average Distance: 74 meters
  • Duration: 1h 30m
  • Period: 2026-10-25T23:36:10+00:00 to 2026-10-26T01:06:07+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (HISTRIA ATLAS and PURITY) maintained close proximity (min 73m, avg 74m) for 90 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 73m, avg 74m
Duration20/25Duration 90 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T04:00:05.050976+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636019212,
        "imo": 9800790,
        "name": "HISTRIA ATLAS",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 73.099999999999994315658113919198513031005859375,
    "avg_distance_m": 74.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 1,
    "duration_minutes": 90,
    "overlap_duration_s": 5397,
    "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": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T23:36:10+00:00",
        "end": "2026-10-26T01:06:07+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 73m, avg 74m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 90 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HISTRIA ATLAS and PURITY) maintained close proximity (min 73m, avg 74m) for 90 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7098782999999997400664142332971096038818359375,
            "lon": 33.32271060000000062473191064782440662384033203125
        },
        "time_window": {
            "start_ts": "2026-10-25T23:36:10+00:00",
            "end_ts": "2026-10-26T01:06:07+00:00"
        },
        "searched_at": "2026-10-26T04:00:05.050976+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 25, 2026 23:27 UTC 80/100 ▼
Vessel A: IMO 9351634 (ZONDAR) Marshall Is
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 311 meters
  • Average Distance: 314 meters
  • Duration: 4h 15m
  • Period: 2026-10-25T23:27:23+00:00 to 2026-10-26T03:42:21+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 311m, avg 314m) for 255 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 311m, avg 314m
Duration25/25Duration 255 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 311.30000000000001136868377216160297393798828125,
    "avg_distance_m": 313.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 255,
    "overlap_duration_s": 15298,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T23:27:23+00:00",
        "end": "2026-10-26T03:42:21+00:00"
    },
    "points_count": {
        "vessel_a": 15,
        "vessel_b": 15
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 311m, avg 314m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 255 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 311m, avg 314m) for 255 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 25, 2026 23:22 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 29 AIS positions
  • Period: 2026-10-25T23:52:31+00:00 to 2026-10-26T06:25:31+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 29,
    "first_point": {
        "ts": "2026-10-25T23:52:31+00:00",
        "lat": 34.70968830000000338031895807944238185882568359375,
        "lon": 33.32304169999999743367880000732839107513427734375
    },
    "last_point": {
        "ts": "2026-10-26T06:25:31+00:00",
        "lat": 34.70968669999999889341779635287821292877197265625,
        "lon": 33.3230582999999995763573679141700267791748046875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 25, 2026 23:22 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 4 meters
  • Data Points: 29 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4,
    "duration_minutes": 393,
    "points": 29,
    "centroid": {
        "lat": 34.70969459310345683888954226858913898468017578125,
        "lon": 33.32305971034482894310713163577020168304443359375
    },
    "bbox": {
        "min_lat": 34.709665000000001100488589145243167877197265625,
        "min_lon": 33.32303499999999729652699897997081279754638671875,
        "max_lat": 34.70972330000000027894202503375709056854248046875,
        "max_lon": 33.32308330000000040627128328196704387664794921875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 25, 2026 22:34 UTC 70/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9396787 (HARBIYE) PANAMA
  • Minimum Distance: 325 meters
  • Average Distance: 329 meters
  • Duration: 1h 27m
  • Period: 2026-10-25T22:34:30+00:00 to 2026-10-26T00:01:31+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 325m, avg 329m) for 87 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 325m, avg 329m
Duration15/25Duration 87 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "min_distance_m": 325.19999999999998863131622783839702606201171875,
    "avg_distance_m": 329.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 87,
    "overlap_duration_s": 5221,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T22:34:30+00:00",
        "end": "2026-10-26T00:01:31+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 325m, avg 329m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 87 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 325m, avg 329m) for 87 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 25, 2026 22:10 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9351634 (ZONDAR) Marshall Is
  • Minimum Distance: 312 meters
  • Average Distance: 314 meters
  • Duration: 2h 33m
  • Period: 2026-10-25T22:10:30+00:00 to 2026-10-26T00:43:28+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 312m, avg 314m) for 153 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 312m, avg 314m
Duration25/25Duration 153 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 312,
    "avg_distance_m": 313.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.5,
    "duration_minutes": 153,
    "overlap_duration_s": 9178,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T22:10:30+00:00",
        "end": "2026-10-26T00:43:28+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 312m, avg 314m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 153 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 312m, avg 314m) for 153 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 25, 2026 22:04 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 26 AIS positions
  • Period: 2026-10-25T22:34:30+00:00 to 2026-10-26T05:04:31+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-10-25T22:34:30+00:00",
        "lat": 34.70973000000000041609382606111466884613037109375,
        "lon": 33.323053299999997989289113320410251617431640625
    },
    "last_point": {
        "ts": "2026-10-26T05:04:31+00:00",
        "lat": 34.7097116999999997233317117206752300262451171875,
        "lon": 33.3230616999999966765244607813656330108642578125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 25, 2026 22:04 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 4 meters
  • Data Points: 26 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 390,
    "points": 26,
    "centroid": {
        "lat": 34.709696723076916669015190564095973968505859375,
        "lon": 33.32305775384615031953217112459242343902587890625
    },
    "bbox": {
        "min_lat": 34.7096700000000026875568437390029430389404296875,
        "min_lon": 33.3230367000000029520379030145704746246337890625,
        "max_lat": 34.70973000000000041609382606111466884613037109375,
        "max_lon": 33.32308330000000040627128328196704387664794921875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 25, 2026 21:19 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9396787 (HARBIYE) PANAMA
  • Minimum Distance: 325 meters
  • Average Distance: 329 meters
  • Duration: 2h 42m
  • Period: 2026-10-25T21:19:28+00:00 to 2026-10-26T00:01:31+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 325m, avg 329m) for 162 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 325m, avg 329m
Duration25/25Duration 162 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T03:15:01.961873+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "min_distance_m": 325.19999999999998863131622783839702606201171875,
    "avg_distance_m": 328.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 162.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 9723,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T21:19:28+00:00",
        "end": "2026-10-26T00:01:31+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 325m, avg 329m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 162 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 325m, avg 329m) for 162 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70896979999999842902980162762105464935302734375,
            "lon": 33.32149110000000291620381176471710205078125
        },
        "time_window": {
            "start_ts": "2026-10-25T21:19:28+00:00",
            "end_ts": "2026-10-26T00:01:31+00:00"
        },
        "searched_at": "2026-10-26T03:15:01.961873+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 25, 2026 21:01 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 26 AIS positions
  • Period: 2026-10-25T21:19:28+00:00 to 2026-10-26T03:49:29+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-10-25T21:19:28+00:00",
        "lat": 34.70969170000000048048605094663798809051513671875,
        "lon": 33.32305999999999812644091434776782989501953125
    },
    "last_point": {
        "ts": "2026-10-26T03:49:29+00:00",
        "lat": 34.7096767000000028247086447663605213165283203125,
        "lon": 33.32304830000000350764821632765233516693115234375
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 25, 2026 21:01 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 4 meters
  • Data Points: 26 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 390,
    "points": 26,
    "centroid": {
        "lat": 34.70969493076922418595131603069603443145751953125,
        "lon": 33.3230565346153753125690855085849761962890625
    },
    "bbox": {
        "min_lat": 34.7096700000000026875568437390029430389404296875,
        "min_lon": 33.3230367000000029520379030145704746246337890625,
        "max_lat": 34.70973000000000041609382606111466884613037109375,
        "max_lon": 33.32308330000000040627128328196704387664794921875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 25, 2026 20:54 UTC 60/100 ▼
Vessel A: IMO 9351634 (ZONDAR) Marshall Is
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 311 meters
  • Average Distance: 312 meters
  • Duration: 33 minutes
  • Period: 2026-10-25T20:54:23+00:00 to 2026-10-25T21:27:21+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 311m, avg 312m) for 33 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 311m, avg 312m
Duration5/25Duration 33 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-25T22:15:01.551414+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 311.19999999999998863131622783839702606201171875,
    "avg_distance_m": 312.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 0.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 33,
    "overlap_duration_s": 1978,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T20:54:23+00:00",
        "end": "2026-10-25T21:27:21+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 311m, avg 312m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 33 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 311m, avg 312m) for 33 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70873879999999900292095844633877277374267578125,
            "lon": 33.32179190000000090776666183955967426300048828125
        },
        "time_window": {
            "start_ts": "2026-10-25T20:54:23+00:00",
            "end_ts": "2026-10-25T21:27:21+00:00"
        },
        "searched_at": "2026-10-25T22:15:01.551414+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 25, 2026 20:04 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 21m
  • Data Points: 22 AIS positions
  • Period: 2026-10-25T20:04:30+00:00 to 2026-10-26T02:25:30+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 381,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-10-25T20:04:30+00:00",
        "lat": 34.709693299999997861959855072200298309326171875,
        "lon": 33.32306330000000116342562250792980194091796875
    },
    "last_point": {
        "ts": "2026-10-26T02:25:30+00:00",
        "lat": 34.70972330000000027894202503375709056854248046875,
        "lon": 33.32305000000000205773176276125013828277587890625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 25, 2026 20:04 UTC 75.0% ▼
  • Duration: 6h 21m
  • Radius: 4 meters
  • Data Points: 22 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4,
    "duration_minutes": 381,
    "points": 22,
    "centroid": {
        "lat": 34.70969415909090827199179329909384250640869140625,
        "lon": 33.32305507272726430301190703175961971282958984375
    },
    "bbox": {
        "min_lat": 34.70967499999999716919774073176085948944091796875,
        "min_lon": 33.3230367000000029520379030145704746246337890625,
        "max_lat": 34.70973000000000041609382606111466884613037109375,
        "max_lon": 33.32308330000000040627128328196704387664794921875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 25, 2026 19:58 UTC 70/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9351634 (ZONDAR) Marshall Is
  • Minimum Distance: 312 meters
  • Average Distance: 315 meters
  • Duration: 1h 21m
  • Period: 2026-10-25T19:58:30+00:00 to 2026-10-25T21:19:28+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 312m, avg 314m) for 81 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 312m, avg 314m
Duration15/25Duration 81 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 312.1000000000000227373675443232059478759765625,
    "avg_distance_m": 314.5,
    "distance_consistency_m": 2.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 81,
    "overlap_duration_s": 4858,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T19:58:30+00:00",
        "end": "2026-10-25T21:19:28+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 312m, avg 314m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 81 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 312m, avg 314m) for 81 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 25, 2026 19:16 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9396787 (HARBIYE) PANAMA
  • Minimum Distance: 325 meters
  • Average Distance: 329 meters
  • Duration: 4h 45m
  • Period: 2026-10-25T19:16:30+00:00 to 2026-10-26T00:01:31+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 325m, avg 329m) for 285 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 325m, avg 329m
Duration25/25Duration 285 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T01:45:04.558943+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "min_distance_m": 325.19999999999998863131622783839702606201171875,
    "avg_distance_m": 328.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 285,
    "overlap_duration_s": 17101,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T19:16:30+00:00",
        "end": "2026-10-26T00:01:31+00:00"
    },
    "points_count": {
        "vessel_a": 13,
        "vessel_b": 13
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 325m, avg 329m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 285 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 325m, avg 329m) for 285 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7089694000000008600181899964809417724609375,
            "lon": 33.32149299999999669807948521338403224945068359375
        },
        "time_window": {
            "start_ts": "2026-10-25T19:16:30+00:00",
            "end_ts": "2026-10-26T00:01:31+00:00"
        },
        "searched_at": "2026-10-26T01:45:04.558943+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 25, 2026 19:01 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 27m
  • Data Points: 23 AIS positions
  • Period: 2026-10-25T19:58:30+00:00 to 2026-10-26T02:25:30+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 387,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-10-25T19:58:30+00:00",
        "lat": 34.70968830000000338031895807944238185882568359375,
        "lon": 33.32307670000000143772922456264495849609375
    },
    "last_point": {
        "ts": "2026-10-26T02:25:30+00:00",
        "lat": 34.70972330000000027894202503375709056854248046875,
        "lon": 33.32305000000000205773176276125013828277587890625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 25, 2026 19:01 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 4 meters
  • Data Points: 23 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4,
    "duration_minutes": 387,
    "points": 23,
    "centroid": {
        "lat": 34.70969390434782297916171955876052379608154296875,
        "lon": 33.323056013043469647527672350406646728515625
    },
    "bbox": {
        "min_lat": 34.70967499999999716919774073176085948944091796875,
        "min_lon": 33.3230367000000029520379030145704746246337890625,
        "max_lat": 34.70973000000000041609382606111466884613037109375,
        "max_lon": 33.32308330000000040627128328196704387664794921875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 25, 2026 18:43 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9396787 (HARBIYE) PANAMA
  • Minimum Distance: 325 meters
  • Average Distance: 329 meters
  • Duration: 5h 6m
  • Period: 2026-10-25T18:55:31+00:00 to 2026-10-26T00:01:31+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 325m, avg 328m) for 306 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 325m, avg 328m
Duration25/25Duration 306 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "min_distance_m": 325.19999999999998863131622783839702606201171875,
    "avg_distance_m": 328.5,
    "distance_consistency_m": 1.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 306,
    "overlap_duration_s": 18360,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T18:55:31+00:00",
        "end": "2026-10-26T00:01:31+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 325m, avg 328m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 306 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 325m, avg 328m) for 306 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 25, 2026 18:39 UTC 60/100 ▼
Vessel A: IMO 9351634 (ZONDAR) Marshall Is
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 313 meters
  • Average Distance: 315 meters
  • Duration: 42 minutes
  • Period: 2026-10-25T18:39:23+00:00 to 2026-10-25T19:21:22+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 313m, avg 315m) for 42 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 313m, avg 315m
Duration5/25Duration 42 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-26T00:15:07.862548+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 313.19999999999998863131622783839702606201171875,
    "avg_distance_m": 315,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 42,
    "overlap_duration_s": 2519,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T18:39:23+00:00",
        "end": "2026-10-25T19:21:22+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 315m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 42 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 313m, avg 315m) for 42 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7087417999999985340764396823942661285400390625,
            "lon": 33.32179670000000015761543181724846363067626953125
        },
        "time_window": {
            "start_ts": "2026-10-25T18:39:23+00:00",
            "end_ts": "2026-10-25T19:21:22+00:00"
        },
        "searched_at": "2026-10-26T00:15:07.862548+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 25, 2026 18:02 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 39m
  • Data Points: 26 AIS positions
  • Period: 2026-10-25T18:40:29+00:00 to 2026-10-26T01:19:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 399.1000000000000227373675443232059478759765625,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-10-25T18:40:29+00:00",
        "lat": 34.70967170000000123764039017260074615478515625,
        "lon": 33.3230616999999966765244607813656330108642578125
    },
    "last_point": {
        "ts": "2026-10-26T01:19:33+00:00",
        "lat": 34.70967499999999716919774073176085948944091796875,
        "lon": 33.32305999999999812644091434776782989501953125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 25, 2026 18:02 UTC 75.0% ▼
  • Duration: 6h 39m
  • Radius: 4 meters
  • Data Points: 26 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4,
    "duration_minutes": 399.1000000000000227373675443232059478759765625,
    "points": 26,
    "centroid": {
        "lat": 34.70969410769230734103985014371573925018310546875,
        "lon": 33.323057053846156350118690170347690582275390625
    },
    "bbox": {
        "min_lat": 34.70967170000000123764039017260074615478515625,
        "min_lon": 33.32303830000000033351170714013278484344482421875,
        "max_lat": 34.70973000000000041609382606111466884613037109375,
        "max_lon": 33.32308330000000040627128328196704387664794921875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 25, 2026 17:42 UTC 75/100 ▼
Vessel A: IMO 9351634 (ZONDAR) Marshall Is
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 313 meters
  • Average Distance: 315 meters
  • Duration: 1h 39m
  • Period: 2026-10-25T17:42:22+00:00 to 2026-10-25T19:21:22+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 313m, avg 315m) for 99 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 313m, avg 315m
Duration20/25Duration 99 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-25T23:15:01.443710+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 313.19999999999998863131622783839702606201171875,
    "avg_distance_m": 315.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 99,
    "overlap_duration_s": 5940,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T17:42:22+00:00",
        "end": "2026-10-25T19:21:22+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 315m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 99 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 313m, avg 315m) for 99 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70873929999999774054231238551437854766845703125,
            "lon": 33.321795600000001513762981630861759185791015625
        },
        "time_window": {
            "start_ts": "2026-10-25T17:42:22+00:00",
            "end_ts": "2026-10-25T19:21:22+00:00"
        },
        "searched_at": "2026-10-25T23:15:01.443710+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 25, 2026 17:23 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 13m
  • Data Points: 22 AIS positions
  • Period: 2026-10-25T17:47:40+00:00 to 2026-10-26T00:01:31+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 373.8999999999999772626324556767940521240234375,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-10-25T17:47:40+00:00",
        "lat": 34.7097033000000010360963642597198486328125,
        "lon": 33.32304500000000047066350816749036312103271484375
    },
    "last_point": {
        "ts": "2026-10-26T00:01:31+00:00",
        "lat": 34.70969500000000351747075910679996013641357421875,
        "lon": 33.32307670000000143772922456264495849609375
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 25, 2026 17:23 UTC 75.0% ▼
  • Duration: 6h 13m
  • Radius: 4 meters
  • Data Points: 22 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 373.8999999999999772626324556767940521240234375,
    "points": 22,
    "centroid": {
        "lat": 34.70969689545454883727870765142142772674560546875,
        "lon": 33.32305735454544759477357729338109493255615234375
    },
    "bbox": {
        "min_lat": 34.70967170000000123764039017260074615478515625,
        "min_lon": 33.32304169999999743367880000732839107513427734375,
        "max_lat": 34.70973000000000041609382606111466884613037109375,
        "max_lon": 33.32307670000000143772922456264495849609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 25, 2026 16:23 UTC 80/100 ▼
Vessel A: IMO 9351634 (ZONDAR) Marshall Is
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 312 meters
  • Average Distance: 315 meters
  • Duration: 2h 24m
  • Period: 2026-10-25T16:57:21+00:00 to 2026-10-25T19:21:22+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 312m, avg 315m) for 144 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 312m, avg 315m
Duration25/25Duration 144 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 312.19999999999998863131622783839702606201171875,
    "avg_distance_m": 314.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 144,
    "overlap_duration_s": 8641,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T16:57:21+00:00",
        "end": "2026-10-25T19:21:22+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 312m, avg 315m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 144 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ZONDAR and PURITY) maintained close proximity (min 312m, avg 315m) for 144 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 25, 2026 16:08 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 28m
  • Data Points: 23 AIS positions
  • Period: 2026-10-25T16:59:38+00:00 to 2026-10-25T23:28:31+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 388.8999999999999772626324556767940521240234375,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-10-25T16:59:38+00:00",
        "lat": 34.70968169999999730634954175911843776702880859375,
        "lon": 33.32305170000000060781530919484794139862060546875
    },
    "last_point": {
        "ts": "2026-10-25T23:28:31+00:00",
        "lat": 34.70968330000000179325070348568260669708251953125,
        "lon": 33.32304169999999743367880000732839107513427734375
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 25, 2026 16:08 UTC 75.0% ▼
  • Duration: 6h 28m
  • Radius: 4 meters
  • Data Points: 23 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 388.8999999999999772626324556767940521240234375,
    "points": 23,
    "centroid": {
        "lat": 34.709695730434788174534332938492298126220703125,
        "lon": 33.32305739565216384789891890250146389007568359375
    },
    "bbox": {
        "min_lat": 34.70967170000000123764039017260074615478515625,
        "min_lon": 33.32304169999999743367880000732839107513427734375,
        "max_lat": 34.70973000000000041609382606111466884613037109375,
        "max_lon": 33.32307670000000143772922456264495849609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 25, 2026 16:07 UTC 60/100 ▼
Vessel A: IMO 9396787 (HARBIYE) PANAMA
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 326 meters
  • Average Distance: 328 meters
  • Duration: 30 minutes
  • Period: 2026-10-25T16:07:29+00:00 to 2026-10-25T16:37:29+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (HARBIYE and PURITY) maintained close proximity (min 326m, avg 328m) for 30 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 326m, avg 328m
Duration5/25Duration 30 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-25T22:00:02.089749+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 326.19999999999998863131622783839702606201171875,
    "avg_distance_m": 327.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 30,
    "overlap_duration_s": 1800,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T16:07:29+00:00",
        "end": "2026-10-25T16:37:29+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 326m, avg 328m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 30 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (HARBIYE and PURITY) maintained close proximity (min 326m, avg 328m) for 30 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.708954099999999698411556892096996307373046875,
            "lon": 33.321494500000000016370904631912708282470703125
        },
        "time_window": {
            "start_ts": "2026-10-25T16:07:29+00:00",
            "end_ts": "2026-10-25T16:37:29+00:00"
        },
        "searched_at": "2026-10-25T22:00:02.089749+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 25, 2026 15:43 UTC 65/100 ▼
Vessel A: IMO 9396787 (HARBIYE) PANAMA
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 326 meters
  • Average Distance: 328 meters
  • Duration: 54 minutes
  • Period: 2026-10-25T15:43:27+00:00 to 2026-10-25T16:37:29+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (HARBIYE and PURITY) maintained close proximity (min 326m, avg 328m) for 54 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 326m, avg 328m
Duration10/25Duration 54 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-25T17:30:07.996904+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 326.19999999999998863131622783839702606201171875,
    "avg_distance_m": 328.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 54,
    "overlap_duration_s": 3242,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T15:43:27+00:00",
        "end": "2026-10-25T16:37:29+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 326m, avg 328m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 54 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (HARBIYE and PURITY) maintained close proximity (min 326m, avg 328m) for 54 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70895800000000264162736129947006702423095703125,
            "lon": 33.3214964000000009036739356815814971923828125
        },
        "time_window": {
            "start_ts": "2026-10-25T15:43:27+00:00",
            "end_ts": "2026-10-25T16:37:29+00:00"
        },
        "searched_at": "2026-10-25T17:30:07.996904+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 25, 2026 15:02 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 19m
  • Data Points: 25 AIS positions
  • Period: 2026-10-25T15:50:41+00:00 to 2026-10-25T22:10:30+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 379.80000000000001136868377216160297393798828125,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-10-25T15:50:41+00:00",
        "lat": 34.70972330000000027894202503375709056854248046875,
        "lon": 33.32307670000000143772922456264495849609375
    },
    "last_point": {
        "ts": "2026-10-25T22:10:30+00:00",
        "lat": 34.7096767000000028247086447663605213165283203125,
        "lon": 33.32305999999999812644091434776782989501953125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 25, 2026 15:02 UTC 75.0% ▼
  • Duration: 6h 19m
  • Radius: 4 meters
  • Data Points: 25 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 379.80000000000001136868377216160297393798828125,
    "points": 25,
    "centroid": {
        "lat": 34.7096940720000048941074055619537830352783203125,
        "lon": 33.32305927200000184029704541899263858795166015625
    },
    "bbox": {
        "min_lat": 34.7096666999999996505721355788409709930419921875,
        "min_lon": 33.32304169999999743367880000732839107513427734375,
        "max_lat": 34.70972669999999737910911790095269680023193359375,
        "max_lon": 33.32307670000000143772922456264495849609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 25, 2026 14:47 UTC 70/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9396787 (HARBIYE) PANAMA
  • Minimum Distance: 328 meters
  • Average Distance: 329 meters
  • Duration: 1h 3m
  • Period: 2026-10-25T14:47:41+00:00 to 2026-10-25T15:50:41+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 328m, avg 329m) for 63 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 328m, avg 329m
Duration15/25Duration 63 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-25T16:15:04.451673+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "min_distance_m": 327.8999999999999772626324556767940521240234375,
    "avg_distance_m": 329.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.1999999999999999555910790149937383830547332763671875,
    "duration_minutes": 63,
    "overlap_duration_s": 3780,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T14:47:41+00:00",
        "end": "2026-10-25T15:50:41+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 328m, avg 329m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 63 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 328m, avg 329m) for 63 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70896900000000329100657836534082889556884765625,
            "lon": 33.32149869999999935998857836239039897918701171875
        },
        "time_window": {
            "start_ts": "2026-10-25T14:47:41+00:00",
            "end_ts": "2026-10-25T15:50:41+00:00"
        },
        "searched_at": "2026-10-25T16:15:04.451673+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 25, 2026 14:08 UTC 65/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9351634 (ZONDAR) Marshall Is
  • Minimum Distance: 313 meters
  • Average Distance: 315 meters
  • Duration: 57 minutes
  • Period: 2026-10-25T14:08:39+00:00 to 2026-10-25T15:05:40+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 313m, avg 314m) for 57 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 313m, avg 314m
Duration10/25Duration 57 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-25T20:30:01.719279+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 313.19999999999998863131622783839702606201171875,
    "avg_distance_m": 314.5,
    "distance_consistency_m": 0.90000000000000002220446049250313080847263336181640625,
    "duration_minutes": 57,
    "overlap_duration_s": 3421,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T14:08:39+00:00",
        "end": "2026-10-25T15:05:40+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 314m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 57 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 313m, avg 314m) for 57 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7087389000000001715307007543742656707763671875,
            "lon": 33.32178950000000128284227685071527957916259765625
        },
        "time_window": {
            "start_ts": "2026-10-25T14:08:39+00:00",
            "end_ts": "2026-10-25T15:05:40+00:00"
        },
        "searched_at": "2026-10-25T20:30:01.719279+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 25, 2026 14:08 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 31m
  • Data Points: 27 AIS positions
  • Period: 2026-10-25T14:47:41+00:00 to 2026-10-25T21:19:28+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 391.80000000000001136868377216160297393798828125,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-10-25T14:47:41+00:00",
        "lat": 34.70969170000000048048605094663798809051513671875,
        "lon": 33.32305999999999812644091434776782989501953125
    },
    "last_point": {
        "ts": "2026-10-25T21:19:28+00:00",
        "lat": 34.70969170000000048048605094663798809051513671875,
        "lon": 33.32305999999999812644091434776782989501953125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 25, 2026 14:08 UTC 75.0% ▼
  • Duration: 6h 31m
  • Radius: 4 meters
  • Data Points: 27 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 391.80000000000001136868377216160297393798828125,
    "points": 27,
    "centroid": {
        "lat": 34.7096948222222323465757654048502445220947265625,
        "lon": 33.32305938888888618976125144399702548980712890625
    },
    "bbox": {
        "min_lat": 34.7096666999999996505721355788409709930419921875,
        "min_lon": 33.32304169999999743367880000732839107513427734375,
        "max_lat": 34.70972669999999737910911790095269680023193359375,
        "max_lon": 33.32307670000000143772922456264495849609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 25, 2026 13:30 UTC 75/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9351634 (ZONDAR) Marshall Is
  • Minimum Distance: 312 meters
  • Average Distance: 314 meters
  • Duration: 1h 30m
  • Period: 2026-10-25T13:35:41+00:00 to 2026-10-25T15:05:40+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 312m, avg 314m) for 90 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 312m, avg 314m
Duration20/25Duration 90 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 311.5,
    "avg_distance_m": 314.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.5,
    "duration_minutes": 90,
    "overlap_duration_s": 5399,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T13:35:41+00:00",
        "end": "2026-10-25T15:05:40+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 312m, avg 314m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 90 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 312m, avg 314m) for 90 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 25, 2026 13:11 UTC 60/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9396787 (HARBIYE) PANAMA
  • Minimum Distance: 327 meters
  • Average Distance: 329 meters
  • Duration: 36 minutes
  • Period: 2026-10-25T13:11:40+00:00 to 2026-10-25T13:47:38+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 327m, avg 329m) for 36 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 327m, avg 329m
Duration5/25Duration 36 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-25T15:15:01.293775+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 352003668,
        "imo": 9396787,
        "name": "HARBIYE",
        "flag": "PANAMA"
    },
    "min_distance_m": 327,
    "avg_distance_m": 328.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 36,
    "overlap_duration_s": 2158,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-25T13:11:40+00:00",
        "end": "2026-10-25T13:47:38+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 327m, avg 329m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 36 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (PURITY and HARBIYE) maintained close proximity (min 327m, avg 329m) for 36 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.708967499999999972715158946812152862548828125,
            "lon": 33.3214966999999973040758050046861171722412109375
        },
        "time_window": {
            "start_ts": "2026-10-25T13:11:40+00:00",
            "end_ts": "2026-10-25T13:47:38+00:00"
        },
        "searched_at": "2026-10-25T15:15:01.293775+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 25, 2026 13:11 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 28m
  • Data Points: 29 AIS positions
  • Period: 2026-10-25T13:35:41+00:00 to 2026-10-25T20:04:30+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 388.80000000000001136868377216160297393798828125,
    "points_in_zone": 29,
    "first_point": {
        "ts": "2026-10-25T13:35:41+00:00",
        "lat": 34.709706699999998136263457126915454864501953125,
        "lon": 33.3230582999999995763573679141700267791748046875
    },
    "last_point": {
        "ts": "2026-10-25T20:04:30+00:00",
        "lat": 34.709693299999997861959855072200298309326171875,
        "lon": 33.32306330000000116342562250792980194091796875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 25, 2026 13:11 UTC 75.0% ▼
  • Duration: 6h 28m
  • Radius: 4 meters
  • Data Points: 29 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.5,
    "duration_minutes": 388.80000000000001136868377216160297393798828125,
    "points": 29,
    "centroid": {
        "lat": 34.70969575172414778307938831858336925506591796875,
        "lon": 33.323058910344826699656550772488117218017578125
    },
    "bbox": {
        "min_lat": 34.7096666999999996505721355788409709930419921875,
        "min_lon": 33.32304169999999743367880000732839107513427734375,
        "max_lat": 34.70972669999999737910911790095269680023193359375,
        "max_lon": 33.32307670000000143772922456264495849609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 25, 2026 12:39 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9351634 (ZONDAR) Marshall Is
  • Minimum Distance: 312 meters
  • Average Distance: 315 meters
  • Duration: 2h 45m
  • Period: 2026-10-25T12:20:41+00:00 to 2026-10-25T15:05:40+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 312m, avg 315m) for 165 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 312m, avg 315m
Duration25/25Duration 165 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 311.5,
    "avg_distance_m": 314.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 165,
    "overlap_duration_s": 9899,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T12:20:41+00:00",
        "end": "2026-10-25T15:05:40+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 312m, avg 315m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 165 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 312m, avg 315m) for 165 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 25, 2026 12:20 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 31m
  • Data Points: 29 AIS positions
  • Period: 2026-10-25T12:44:40+00:00 to 2026-10-25T19:16:30+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 391.80000000000001136868377216160297393798828125,
    "points_in_zone": 29,
    "first_point": {
        "ts": "2026-10-25T12:44:40+00:00",
        "lat": 34.709710000000001173248165287077426910400390625,
        "lon": 33.323066699999998263592715375125408172607421875
    },
    "last_point": {
        "ts": "2026-10-25T19:16:30+00:00",
        "lat": 34.7097016999999965491952025331556797027587890625,
        "lon": 33.3230616999999966765244607813656330108642578125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 25, 2026 12:20 UTC 75.0% ▼
  • Duration: 6h 31m
  • Radius: 4 meters
  • Data Points: 29 AIS positions
  • Centroid: 34.7097, 33.3231
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.5,
    "duration_minutes": 391.80000000000001136868377216160297393798828125,
    "points": 29,
    "centroid": {
        "lat": 34.70969724482758778094648732803761959075927734375,
        "lon": 33.3230589689655261054213042370975017547607421875
    },
    "bbox": {
        "min_lat": 34.7096666999999996505721355788409709930419921875,
        "min_lon": 33.32304169999999743367880000732839107513427734375,
        "max_lat": 34.70972669999999737910911790095269680023193359375,
        "max_lon": 33.32307670000000143772922456264495849609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 25, 2026 11:14 UTC 90/100 ▼
Vessel A: IMO 9800790 (HISTRIA ATLAS) Liberia
Vessel B: IMO 9325348 (PURITY) PANAMA
  • Minimum Distance: 71 meters
  • Average Distance: 74 meters
  • Duration: 1h 33m
  • Period: 2026-10-25T11:39:10+00:00 to 2026-10-25T13:12:08+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (HISTRIA ATLAS and PURITY) maintained close proximity (min 71m, avg 74m) for 93 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 71m, avg 74m
Duration20/25Duration 93 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636019212,
        "imo": 9800790,
        "name": "HISTRIA ATLAS",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "min_distance_m": 70.7000000000000028421709430404007434844970703125,
    "avg_distance_m": 73.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 93,
    "overlap_duration_s": 5578,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T11:39:10+00:00",
        "end": "2026-10-25T13:12:08+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 71m, avg 74m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 93 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HISTRIA ATLAS and PURITY) maintained close proximity (min 71m, avg 74m) for 93 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 25, 2026 11:08 UTC 80/100 ▼
Vessel A: IMO 9325348 (PURITY) PANAMA
Vessel B: IMO 9351634 (ZONDAR) Marshall Is
  • Minimum Distance: 312 meters
  • Average Distance: 315 meters
  • Duration: 3h 57m
  • Period: 2026-10-25T11:08:41+00:00 to 2026-10-25T15:05:40+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 312m, avg 315m) for 237 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 312m, avg 315m
Duration25/25Duration 237 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004909,
        "imo": 9325348,
        "name": "PURITY",
        "flag": "PANAMA"
    },
    "vessel_b": {
        "mmsi": 538005166,
        "imo": 9351634,
        "name": "ZONDAR",
        "flag": "Marshall Is"
    },
    "min_distance_m": 311.5,
    "avg_distance_m": 315,
    "distance_consistency_m": 1.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 237,
    "overlap_duration_s": 14219,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T11:08:41+00:00",
        "end": "2026-10-25T15:05:40+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 312m, avg 315m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 237 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PURITY and ZONDAR) maintained close proximity (min 312m, avg 315m) for 237 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Oct 26 17:43 34.5603 33.6996 12.5 kn 117.0° Northern Baltic Sea Surveillance Zone
Oct 26 17:29 34.5826 33.6452 12.5 kn 115.8° Northern Baltic Sea Surveillance Zone
Oct 26 17:22 34.5925 33.6207 12.3 kn 116.1° Northern Baltic Sea Surveillance Zone
Oct 26 17:20 34.5963 33.6114 12.3 kn 116.0° Northern Baltic Sea Surveillance Zone
Oct 26 17:05 34.6184 33.5578 12.4 kn 116.9° Northern Baltic Sea Surveillance Zone
Oct 26 17:04 34.6202 33.5534 12.4 kn 115.7° Northern Baltic Sea Surveillance Zone
Oct 26 16:57 34.6300 33.5284 12.4 kn 115.7° Northern Baltic Sea Surveillance Zone
Oct 26 16:55 34.6330 33.5207 12.4 kn 115.3° Northern Baltic Sea Surveillance Zone
Oct 26 16:54 34.6345 33.5170 12.4 kn 115.3° Northern Baltic Sea Surveillance Zone
Oct 26 16:33 34.6680 33.4359 12.5 kn 117.5° Northern Baltic Sea Surveillance Zone
Oct 26 16:31 34.6712 33.4284 12.5 kn 116.9° Northern Baltic Sea Surveillance Zone
Oct 26 16:29 34.6749 33.4196 12.4 kn 116.9° Northern Baltic Sea Surveillance Zone
Oct 26 16:24 34.6816 33.4035 12.0 kn 116.1° Northern Baltic Sea Surveillance Zone
Oct 26 16:16 34.6937 33.3740 10.3 kn 118.2° Northern Baltic Sea Surveillance Zone
Oct 26 16:02 34.7059 33.3376 5.9 kn 116.5° Northern Baltic Sea Surveillance Zone
Oct 26 15:59 34.7078 33.3327 4.1 kn 114.2° Northern Baltic Sea Surveillance Zone
Oct 26 15:53 34.7096 33.3270 1.9 kn 97.1° Northern Baltic Sea Surveillance Zone
Oct 26 15:46 34.7095 33.3235 0.8 kn 60.6° Northern Baltic Sea Surveillance Zone
Oct 26 15:31 34.7097 33.3231 0.1 kn 35.5° Northern Baltic Sea Surveillance Zone
Oct 26 15:16 34.7097 33.3231 0.0 kn 35.5° Northern Baltic Sea Surveillance Zone

Showing 20 of 100 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.