Intelligence Feed - FleetLeaks

Zone Dwell Central Mediterranean Sanctions Monitoring Zone

Jul 24, 2026 01:25 UTC 80.0% ▼

Zone: Central Mediterranean Sanctions Monitoring Zone
Duration: 1h 10m
Data Points: 14 AIS positions
Period: 2026-07-24T01:25:06+00:00 to 2026-07-24T02:35:25+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_078",
    "zone_name": "Central Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 70.2999999999999971578290569595992565155029296875,
    "points_in_zone": 14,
    "first_point": {
        "ts": "2026-07-24T01:25:06+00:00",
        "lat": -34.5333499999999986584953148849308490753173828125,
        "lon": 18.208833299999998445173332584090530872344970703125
    },
    "last_point": {
        "ts": "2026-07-24T02:35:25+00:00",
        "lat": -34.63701669999999666060830350033938884735107421875,
        "lon": 18.443266699999998792236510780639946460723876953125
    }
}

Methodology: 2026.01.18

Zone Dwell Atlantic Midway Monitoring Zone

Jul 23, 2026 21:01 UTC 80.0% ▼

Zone: Atlantic Midway Monitoring Zone
Duration: 2h 3m
Data Points: 26 AIS positions
Period: 2026-07-23T21:01:06+00:00 to 2026-07-23T23:04:16+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_079",
    "zone_name": "Atlantic Midway Monitoring Zone",
    "dwell_minutes": 123.2000000000000028421709430404007434844970703125,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-07-23T21:01:06+00:00",
        "lat": -33.87178329999999704114088672213256359100341796875,
        "lon": 18.314866699999999610781742376275360584259033203125
    },
    "last_point": {
        "ts": "2026-07-23T23:04:16+00:00",
        "lat": -34.10646669999999858191586099565029144287109375,
        "lon": 18.182050000000000267164068645797669887542724609375
    }
}

Methodology: 2026.01.18

Zone Dwell Atlantic Midway Monitoring Zone

Jul 23, 2026 20:01 UTC 80.0% ▼

Zone: Atlantic Midway Monitoring Zone
Duration: 3h 2m
Data Points: 43 AIS positions
Period: 2026-07-23T20:01:26+00:00 to 2026-07-23T23:04:16+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_079",
    "zone_name": "Atlantic Midway Monitoring Zone",
    "dwell_minutes": 182.80000000000001136868377216160297393798828125,
    "points_in_zone": 43,
    "first_point": {
        "ts": "2026-07-23T20:01:26+00:00",
        "lat": -33.88751669999999904803189565427601337432861328125,
        "lon": 18.267133300000001128182702814228832721710205078125
    },
    "last_point": {
        "ts": "2026-07-23T23:04:16+00:00",
        "lat": -34.10646669999999858191586099565029144287109375,
        "lon": 18.182050000000000267164068645797669887542724609375
    }
}

Methodology: 2026.01.18

Zone Dwell Atlantic Midway Monitoring Zone

Jul 23, 2026 19:01 UTC 80.0% ▼

Zone: Atlantic Midway Monitoring Zone
Duration: 4h 2m
Data Points: 60 AIS positions
Period: 2026-07-23T19:01:26+00:00 to 2026-07-23T23:04:16+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_079",
    "zone_name": "Atlantic Midway Monitoring Zone",
    "dwell_minutes": 242.80000000000001136868377216160297393798828125,
    "points_in_zone": 60,
    "first_point": {
        "ts": "2026-07-23T19:01:26+00:00",
        "lat": -33.897300000000001318767317570745944976806640625,
        "lon": 18.171283299999998916973709128797054290771484375
    },
    "last_point": {
        "ts": "2026-07-23T23:04:16+00:00",
        "lat": -34.10646669999999858191586099565029144287109375,
        "lon": 18.182050000000000267164068645797669887542724609375
    }
}

Methodology: 2026.01.18

Zone Dwell Atlantic Midway Monitoring Zone

Jul 23, 2026 18:41 UTC 80.0% ▼

Zone: Atlantic Midway Monitoring Zone
Duration: 4h 23m
Data Points: 64 AIS positions
Period: 2026-07-23T18:41:06+00:00 to 2026-07-23T23:04:16+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_079",
    "zone_name": "Atlantic Midway Monitoring Zone",
    "dwell_minutes": 263.19999999999998863131622783839702606201171875,
    "points_in_zone": 64,
    "first_point": {
        "ts": "2026-07-23T18:41:06+00:00",
        "lat": -33.86073329999999970141288940794765949249267578125,
        "lon": 18.10591670000000164009179570712149143218994140625
    },
    "last_point": {
        "ts": "2026-07-23T23:04:16+00:00",
        "lat": -34.10646669999999858191586099565029144287109375,
        "lon": 18.182050000000000267164068645797669887542724609375
    }
}

Methodology: 2026.01.18

Zone Dwell discovered_010

Apr 26, 2026 22:02 UTC 80.0% ▼

Zone: discovered_010
Duration: 1 hours
Data Points: 16 AIS positions
Period: 2026-04-26T22:02:33+00:00 to 2026-04-26T23:03:24+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_010",
    "zone_name": "Western Mediterranean Sanctioned Vessel Zone",
    "dwell_minutes": 60.89999999999999857891452847979962825775146484375,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-04-26T22:02:33+00:00",
        "lat": 36.10853329999999772326191305182874202728271484375,
        "lon": -8.9563167000000003525883585098199546337127685546875
    },
    "last_point": {
        "ts": "2026-04-26T23:03:24+00:00",
        "lat": 36.19893330000000020163497538305819034576416015625,
        "lon": -9.203900000000000858335624798201024532318115234375
    }
}

Methodology: 2026.01.18

Zone Dwell discovered_010

Apr 26, 2026 21:09 UTC 80.0% ▼

Zone: discovered_010
Duration: 1h 54m
Data Points: 25 AIS positions
Period: 2026-04-26T21:09:22+00:00 to 2026-04-26T23:03:24+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_010",
    "zone_name": "Western Mediterranean Sanctioned Vessel Zone",
    "dwell_minutes": 114,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-04-26T21:09:22+00:00",
        "lat": 36.03006669999999900255716056562960147857666015625,
        "lon": -8.7408500000000000085265128291212022304534912109375
    },
    "last_point": {
        "ts": "2026-04-26T23:03:24+00:00",
        "lat": 36.19893330000000020163497538305819034576416015625,
        "lon": -9.203900000000000858335624798201024532318115234375
    }
}

Methodology: 2026.01.18

Zone Dwell discovered_010

Apr 26, 2026 20:28 UTC 80.0% ▼

Zone: discovered_010
Duration: 2h 34m
Data Points: 41 AIS positions
Period: 2026-04-26T20:28:44+00:00 to 2026-04-26T23:03:24+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_010",
    "zone_name": "Western Mediterranean Sanctioned Vessel Zone",
    "dwell_minutes": 154.69999999999998863131622783839702606201171875,
    "points_in_zone": 41,
    "first_point": {
        "ts": "2026-04-26T20:28:44+00:00",
        "lat": 35.97628329999999863275661482475697994232177734375,
        "lon": -8.5784000000000002472688720445148646831512451171875
    },
    "last_point": {
        "ts": "2026-04-26T23:03:24+00:00",
        "lat": 36.19893330000000020163497538305819034576416015625,
        "lon": -9.203900000000000858335624798201024532318115234375
    }
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 8, 2026 05:07 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 1h 50m
Data Points: 31 AIS positions
Period: 2026-04-08T05:07:23+00:00 to 2026-04-08T06:57:56+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 110.5,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-04-08T05:07:23+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-08T06:57:56+00:00",
        "lat": 34.70036669999999645597199560143053531646728515625,
        "lon": 33.30879999999999796500560478307306766510009765625
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 8, 2026 05:07 UTC 75.0% ▼

Duration: 1h 48m
Radius: 848 meters
Data Points: 30 AIS positions
Centroid: 34.7077, 33.3191
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 848.299999999999954525264911353588104248046875,
    "duration_minutes": 108.5,
    "points": 30,
    "centroid": {
        "lat": 34.7077210966666598324081860482692718505859375,
        "lon": 33.319063913333337723088334314525127410888671875
    },
    "bbox": {
        "min_lat": 34.70368330000000156587702804245054721832275390625,
        "min_lon": 33.3111999999999994770405464805662631988525390625,
        "max_lat": 34.70824999999999960209606797434389591217041015625,
        "max_lon": 33.31996670000000193567757378332316875457763671875
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 8, 2026 04:07 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 2h 50m
Data Points: 45 AIS positions
Period: 2026-04-08T04:07:20+00:00 to 2026-04-08T06:57:56+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 170.599999999999994315658113919198513031005859375,
    "points_in_zone": 45,
    "first_point": {
        "ts": "2026-04-08T04:07:20+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31994999999999862438926356844604015350341796875
    },
    "last_point": {
        "ts": "2026-04-08T06:57:56+00:00",
        "lat": 34.70036669999999645597199560143053531646728515625,
        "lon": 33.30879999999999796500560478307306766510009765625
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 8, 2026 04:07 UTC 75.0% ▼

Duration: 2h 48m
Radius: 878 meters
Data Points: 44 AIS positions
Centroid: 34.7079, 33.3193
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 878.3999999999999772626324556767940521240234375,
    "duration_minutes": 168.599999999999994315658113919198513031005859375,
    "points": 44,
    "centroid": {
        "lat": 34.7078549090909262986315297894179821014404296875,
        "lon": 33.3193488863636275709723122417926788330078125
    },
    "bbox": {
        "min_lat": 34.70368330000000156587702804245054721832275390625,
        "min_lon": 33.3111999999999994770405464805662631988525390625,
        "max_lat": 34.70824999999999960209606797434389591217041015625,
        "max_lon": 33.31996670000000193567757378332316875457763671875
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 8, 2026 03:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 3h 56m
Data Points: 60 AIS positions
Period: 2026-04-08T03:01:18+00:00 to 2026-04-08T06:57:56+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 236.599999999999994315658113919198513031005859375,
    "points_in_zone": 60,
    "first_point": {
        "ts": "2026-04-08T03:01:18+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-08T06:57:56+00:00",
        "lat": 34.70036669999999645597199560143053531646728515625,
        "lon": 33.30879999999999796500560478307306766510009765625
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 8, 2026 03:01 UTC 75.0% ▼

Duration: 3h 54m
Radius: 895 meters
Data Points: 59 AIS positions
Centroid: 34.7079, 33.3195
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 894.700000000000045474735088646411895751953125,
    "duration_minutes": 234.599999999999994315658113919198513031005859375,
    "points": 59,
    "centroid": {
        "lat": 34.70792993220339894833159632980823516845703125,
        "lon": 33.31950199491522113248720415867865085601806640625
    },
    "bbox": {
        "min_lat": 34.70368330000000156587702804245054721832275390625,
        "min_lon": 33.3111999999999994770405464805662631988525390625,
        "max_lat": 34.70824999999999960209606797434389591217041015625,
        "max_lon": 33.31996670000000193567757378332316875457763671875
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 8, 2026 02:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 4h 56m
Data Points: 74 AIS positions
Period: 2026-04-08T02:01:21+00:00 to 2026-04-08T06:57:56+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 296.6000000000000227373675443232059478759765625,
    "points_in_zone": 74,
    "first_point": {
        "ts": "2026-04-08T02:01:21+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-08T06:57:56+00:00",
        "lat": 34.70036669999999645597199560143053531646728515625,
        "lon": 33.30879999999999796500560478307306766510009765625
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 8, 2026 02:01 UTC 75.0% ▼

Duration: 4h 54m
Radius: 904 meters
Data Points: 73 AIS positions
Centroid: 34.7080, 33.3196
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 904.1000000000000227373675443232059478759765625,
    "duration_minutes": 294.6000000000000227373675443232059478759765625,
    "points": 73,
    "centroid": {
        "lat": 34.70797213698632077694128383882343769073486328125,
        "lon": 33.31959111643831050741937360726296901702880859375
    },
    "bbox": {
        "min_lat": 34.70368330000000156587702804245054721832275390625,
        "min_lon": 33.3111999999999994770405464805662631988525390625,
        "max_lat": 34.70824999999999960209606797434389591217041015625,
        "max_lon": 33.31996670000000193567757378332316875457763671875
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 8, 2026 01:07 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 5h 50m
Data Points: 87 AIS positions
Period: 2026-04-08T01:07:23+00:00 to 2026-04-08T06:57:56+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 350.6000000000000227373675443232059478759765625,
    "points_in_zone": 87,
    "first_point": {
        "ts": "2026-04-08T01:07:23+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-08T06:57:56+00:00",
        "lat": 34.70036669999999645597199560143053531646728515625,
        "lon": 33.30879999999999796500560478307306766510009765625
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 8, 2026 01:07 UTC 75.0% ▼

Duration: 5h 48m
Radius: 910 meters
Data Points: 86 AIS positions
Centroid: 34.7080, 33.3196
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 910.1000000000000227373675443232059478759765625,
    "duration_minutes": 348.5,
    "points": 86,
    "centroid": {
        "lat": 34.7079990232558230900394846685230731964111328125,
        "lon": 33.3196478906976523148841806687414646148681640625
    },
    "bbox": {
        "min_lat": 34.70368330000000156587702804245054721832275390625,
        "min_lon": 33.3111999999999994770405464805662631988525390625,
        "max_lat": 34.70824999999999960209606797434389591217041015625,
        "max_lon": 33.31996670000000193567757378332316875457763671875
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 8, 2026 00:37 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 20m
Data Points: 94 AIS positions
Period: 2026-04-08T00:37:18+00:00 to 2026-04-08T06:57:56+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 380.6000000000000227373675443232059478759765625,
    "points_in_zone": 94,
    "first_point": {
        "ts": "2026-04-08T00:37:18+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-08T06:57:56+00:00",
        "lat": 34.70036669999999645597199560143053531646728515625,
        "lon": 33.30879999999999796500560478307306766510009765625
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 8, 2026 00:37 UTC 75.0% ▼

Duration: 6h 18m
Radius: 913 meters
Data Points: 93 AIS positions
Centroid: 34.7080, 33.3197
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 912.6000000000000227373675443232059478759765625,
    "duration_minutes": 378.6000000000000227373675443232059478759765625,
    "points": 93,
    "centroid": {
        "lat": 34.708010387096777549231774173676967620849609375,
        "lon": 33.31967188709675298241563723422586917877197265625
    },
    "bbox": {
        "min_lat": 34.70368330000000156587702804245054721832275390625,
        "min_lon": 33.3111999999999994770405464805662631988525390625,
        "max_lat": 34.70824999999999960209606797434389591217041015625,
        "max_lon": 33.31996670000000193567757378332316875457763671875
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 23:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 33m
Data Points: 81 AIS positions
Period: 2026-04-07T23:25:19+00:00 to 2026-04-08T05:58:19+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 81,
    "first_point": {
        "ts": "2026-04-07T23:25:19+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-08T05:58:19+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 23:01 UTC 75.0% ▼

Duration: 6h 33m
Radius: 2 meters
Data Points: 81 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 393,
    "points": 81,
    "centroid": {
        "lat": 34.708147525925909349098219536244869232177734375,
        "lon": 33.319962576543190380107262171804904937744140625
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.31994999999999862438926356844604015350341796875,
        "max_lat": 34.7081500000000033878677641041576862335205078125,
        "max_lon": 33.31996670000000193567757378332316875457763671875
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 22:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 33m
Data Points: 79 AIS positions
Period: 2026-04-07T22:52:20+00:00 to 2026-04-08T05:25:20+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 79,
    "first_point": {
        "ts": "2026-04-07T22:52:20+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-08T05:25:20+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 22:01 UTC 75.0% ▼

Duration: 6h 33m
Radius: 2 meters
Data Points: 79 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 393,
    "points": 79,
    "centroid": {
        "lat": 34.7081478860759347071507363580167293548583984375,
        "lon": 33.31996247215187878509823349304497241973876953125
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.31994999999999862438926356844604015350341796875,
        "max_lat": 34.70816669999999959372871671803295612335205078125,
        "max_lon": 33.31996670000000193567757378332316875457763671875
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 21:07 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 33m
Data Points: 72 AIS positions
Period: 2026-04-07T21:52:21+00:00 to 2026-04-08T04:25:19+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 72,
    "first_point": {
        "ts": "2026-04-07T21:52:21+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-08T04:25:19+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31994999999999862438926356844604015350341796875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 21:07 UTC 75.0% ▼

Duration: 6h 33m
Radius: 2 meters
Data Points: 72 AIS positions
Centroid: 34.7082, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 1.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 393,
    "points": 72,
    "centroid": {
        "lat": 34.70814999999996786073097609914839267730712890625,
        "lon": 33.3199620611110987056235899217426776885986328125
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.31994999999999862438926356844604015350341796875,
        "max_lat": 34.70816669999999959372871671803295612335205078125,
        "max_lon": 33.31996670000000193567757378332316875457763671875
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 20:04 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 36m
Data Points: 69 AIS positions
Period: 2026-04-07T20:40:19+00:00 to 2026-04-08T03:16:20+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 69,
    "first_point": {
        "ts": "2026-04-07T20:40:19+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-08T03:16:20+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31994999999999862438926356844604015350341796875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 20:04 UTC 75.0% ▼

Duration: 6h 36m
Radius: 2 meters
Data Points: 69 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 396,
    "points": 69,
    "centroid": {
        "lat": 34.70814806376807837295928038656711578369140625,
        "lon": 33.31996573188401811194125912152230739593505859375
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.31994999999999862438926356844604015350341796875,
        "max_lat": 34.70816669999999959372871671803295612335205078125,
        "max_lon": 33.31996670000000193567757378332316875457763671875
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 19:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 35m
Data Points: 71 AIS positions
Period: 2026-04-07T19:52:23+00:00 to 2026-04-08T02:28:17+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 395.8999999999999772626324556767940521240234375,
    "points_in_zone": 71,
    "first_point": {
        "ts": "2026-04-07T19:52:23+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-08T02:28:17+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 19:01 UTC 75.0% ▼

Duration: 6h 35m
Radius: 2 meters
Data Points: 71 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 395.8999999999999772626324556767940521240234375,
    "points": 71,
    "centroid": {
        "lat": 34.708148118309821938964887522161006927490234375,
        "lon": 33.319966933802760422622668556869029998779296875
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.31996670000000193567757378332316875457763671875,
        "max_lat": 34.70816669999999959372871671803295612335205078125,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 18:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 32m
Data Points: 65 AIS positions
Period: 2026-04-07T18:52:22+00:00 to 2026-04-08T01:25:18+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 392.8999999999999772626324556767940521240234375,
    "points_in_zone": 65,
    "first_point": {
        "ts": "2026-04-07T18:52:22+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-08T01:25:18+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 18:01 UTC 75.0% ▼

Duration: 6h 32m
Radius: 2 meters
Data Points: 65 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 392.8999999999999772626324556767940521240234375,
    "points": 65,
    "centroid": {
        "lat": 34.70814794461538355108132236637175083160400390625,
        "lon": 33.31996695538456521035186597146093845367431640625
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.31996670000000193567757378332316875457763671875,
        "max_lat": 34.70816669999999959372871671803295612335205078125,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 17:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 30m
Data Points: 80 AIS positions
Period: 2026-04-07T17:01:21+00:00 to 2026-04-07T23:31:22+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 390,
    "points_in_zone": 80,
    "first_point": {
        "ts": "2026-04-07T17:01:21+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T23:31:22+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 17:01 UTC 75.0% ▼

Duration: 6h 30m
Radius: 2 meters
Data Points: 80 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 390,
    "points": 80,
    "centroid": {
        "lat": 34.70814770374999369551005656830966472625732421875,
        "lon": 33.3199664899999419276355183683335781097412109375
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.31994999999999862438926356844604015350341796875,
        "max_lat": 34.70816669999999959372871671803295612335205078125,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 16:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 32m
Data Points: 81 AIS positions
Period: 2026-04-07T16:55:23+00:00 to 2026-04-07T23:28:20+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 392.8999999999999772626324556767940521240234375,
    "points_in_zone": 81,
    "first_point": {
        "ts": "2026-04-07T16:55:23+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T23:28:20+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 16:01 UTC 75.0% ▼

Duration: 6h 32m
Radius: 2 meters
Data Points: 81 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 392.8999999999999772626324556767940521240234375,
    "points": 81,
    "centroid": {
        "lat": 34.70814773209875880866093211807310581207275390625,
        "lon": 33.31996649259252762931282632052898406982421875
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.31994999999999862438926356844604015350341796875,
        "max_lat": 34.70816669999999959372871671803295612335205078125,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 15:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 26m
Data Points: 88 AIS positions
Period: 2026-04-07T15:34:22+00:00 to 2026-04-07T22:01:19+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 386.8999999999999772626324556767940521240234375,
    "points_in_zone": 88,
    "first_point": {
        "ts": "2026-04-07T15:34:22+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.319933300000002418528310954570770263671875
    },
    "last_point": {
        "ts": "2026-04-07T22:01:19+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 15:01 UTC 75.0% ▼

Duration: 6h 26m
Radius: 3 meters
Data Points: 88 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 2.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 386.8999999999999772626324556767940521240234375,
    "points": 88,
    "centroid": {
        "lat": 34.7081473431818068320353631861507892608642578125,
        "lon": 33.31996404204539174997989903204143047332763671875
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.319933300000002418528310954570770263671875,
        "max_lat": 34.70816669999999959372871671803295612335205078125,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 14:13 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 36m
Data Points: 90 AIS positions
Period: 2026-04-07T14:52:19+00:00 to 2026-04-07T21:28:25+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 90,
    "first_point": {
        "ts": "2026-04-07T14:52:19+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T21:28:25+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 14:13 UTC 75.0% ▼

Duration: 6h 36m
Radius: 3 meters
Data Points: 90 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 2.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 90,
    "centroid": {
        "lat": 34.70814851555552849049490760080516338348388671875,
        "lon": 33.31996261666660075206891633570194244384765625
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.319933300000002418528310954570770263671875,
        "max_lat": 34.70816669999999959372871671803295612335205078125,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 13:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 36m
Data Points: 78 AIS positions
Period: 2026-04-07T13:01:21+00:00 to 2026-04-07T19:37:22+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 78,
    "first_point": {
        "ts": "2026-04-07T13:01:21+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T19:37:22+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 13:01 UTC 75.0% ▼

Duration: 6h 36m
Radius: 3 meters
Data Points: 78 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 2.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 396,
    "points": 78,
    "centroid": {
        "lat": 34.70814764487176518059641239233314990997314453125,
        "lon": 33.319962199999935137384454719722270965576171875
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.319933300000002418528310954570770263671875,
        "max_lat": 34.70816669999999959372871671803295612335205078125,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 12:49 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 33m
Data Points: 77 AIS positions
Period: 2026-04-07T12:52:22+00:00 to 2026-04-07T19:25:23+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 77,
    "first_point": {
        "ts": "2026-04-07T12:52:22+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T19:25:23+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 12:49 UTC 75.0% ▼

Duration: 6h 33m
Radius: 3 meters
Data Points: 77 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 2.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 393,
    "points": 77,
    "centroid": {
        "lat": 34.70814718051945391152912634424865245819091796875,
        "lon": 33.31996214155838487158689531497657299041748046875
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.319933300000002418528310954570770263671875,
        "max_lat": 34.70816669999999959372871671803295612335205078125,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Sts🛰️✗ Istanbul Black Sea Surveillance Zone

Apr 7, 2026 11:23 UTC 77/100 ▼

Vessel A: IMO 9430739 (SRIWANGI III) Singapore

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 325 meters
Average Distance: 340 meters
Duration: 3h 24m
Period: 2026-04-07T11:23:12+00:00 to 2026-04-07T14:47:11+00:00
Vessel A Avg Speed: 0.2 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 77/100

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

View scoring breakdown

Factor	Score	Detail
Distance Tightness	10/25	Min distance 325m, avg 340m
Duration	25/25	Duration 204 minutes
Speed Stability	17/20	both nearly stationary; stable speeds
Distance Consistency	15/15	Distance variance ±18m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

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

Show Raw Evidence JSON

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

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 11:22 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 36m
Data Points: 67 AIS positions
Period: 2026-04-07T11:40:19+00:00 to 2026-04-07T18:16:22+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 67,
    "first_point": {
        "ts": "2026-04-07T11:40:19+00:00",
        "lat": 34.70816669999999959372871671803295612335205078125,
        "lon": 33.31994999999999862438926356844604015350341796875
    },
    "last_point": {
        "ts": "2026-04-07T18:16:22+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 11:22 UTC 75.0% ▼

Duration: 6h 36m
Radius: 3 meters
Data Points: 67 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 2.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 67,
    "centroid": {
        "lat": 34.70814800597012350635850452817976474761962890625,
        "lon": 33.31996121194024595979499281384050846099853515625
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.319933300000002418528310954570770263671875,
        "max_lat": 34.70816669999999959372871671803295612335205078125,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Sts🛰️✗ Istanbul Black Sea Surveillance Zone

Apr 7, 2026 10:06 UTC 69/100 ▼

Vessel A: IMO 9517288 (ALFA SEA) Panama

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 340 meters
Average Distance: 350 meters
Duration: 1h 36m
Period: 2026-04-07T10:06:53+00:00 to 2026-04-07T11:43:39+00:00
Vessel A Avg Speed: 0.2 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 69/100

Moderate-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 340m, avg 350m) for 97 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	10/25	Min distance 340m, avg 350m
Duration	20/25	Duration 97 minutes
Speed Stability	14/20	both nearly stationary; somewhat variable speeds
Distance Consistency	15/15	Distance variance ±8m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-07T16:45:19.378276+00:00

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 339.6000000000000227373675443232059478759765625,
    "avg_distance_m": 349.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 7.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 96.7999999999999971578290569595992565155029296875,
    "overlap_duration_s": 5806,
    "speed_a_avg": 0.2399999999999999911182158029987476766109466552734375,
    "speed_a_std": 0.64000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.2399999999999999911182158029987476766109466552734375,
            "max_sog": 1.6999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T10:06:53+00:00",
        "end": "2026-04-07T11:43:39+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 69,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 340m, avg 350m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 97 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b18m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 340m, avg 350m) for 97 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70922209999999807905624038539826869964599609375,
            "lon": 33.3213731000000024096152628771960735321044921875
        },
        "time_window": {
            "start_ts": "2026-04-07T10:06:53+00:00",
            "end_ts": "2026-04-07T11:43:39+00:00"
        },
        "searched_at": "2026-04-07T16:45:19.378276+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 10:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 33m
Data Points: 49 AIS positions
Period: 2026-04-07T10:13:21+00:00 to 2026-04-07T16:46:21+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 49,
    "first_point": {
        "ts": "2026-04-07T10:13:21+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31994999999999862438926356844604015350341796875
    },
    "last_point": {
        "ts": "2026-04-07T16:46:21+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 10:01 UTC 75.0% ▼

Duration: 6h 33m
Radius: 3 meters
Data Points: 49 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 2.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 393,
    "points": 49,
    "centroid": {
        "lat": 34.70814829591835604105654056183993816375732421875,
        "lon": 33.31995919591835075834751478396356105804443359375
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.319933300000002418528310954570770263671875,
        "max_lat": 34.70816669999999959372871671803295612335205078125,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 7, 2026 09:52 UTC 77/100 ▼

Vessel A: IMO 9430739 (SRIWANGI III) Singapore

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 325 meters
Average Distance: 340 meters
Duration: 4h 54m
Period: 2026-04-07T09:52:14+00:00 to 2026-04-07T14:47:11+00:00
Vessel A Avg Speed: 0.2 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 77/100

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

View scoring breakdown

Factor	Score	Detail
Distance Tightness	10/25	Min distance 325m, avg 340m
Duration	25/25	Duration 295 minutes
Speed Stability	17/20	both nearly stationary; stable speeds
Distance Consistency	15/15	Distance variance ±14m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 325.19999999999998863131622783839702606201171875,
    "avg_distance_m": 340,
    "distance_consistency_m": 14.300000000000000710542735760100185871124267578125,
    "duration_minutes": 294.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 17697,
    "speed_a_avg": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_a_std": 0.320000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1499999999999999944488848768742172978818416595458984375,
            "max_sog": 0.8000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T09:52:14+00:00",
        "end": "2026-04-07T14:47:11+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 77,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 325m, avg 340m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 295 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b114m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 325m, avg 340m) for 295 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 7, 2026 09:34 UTC 74/100 ▼

Vessel A: IMO 9517288 (ALFA SEA) Panama

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 340 meters
Average Distance: 353 meters
Duration: 2h 1m
Period: 2026-04-07T09:41:57+00:00 to 2026-04-07T11:43:39+00:00
Vessel A Avg Speed: 0.2 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 74/100

Moderate-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 340m, avg 352m) for 122 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	10/25	Min distance 340m, avg 352m
Duration	25/25	Duration 122 minutes
Speed Stability	14/20	both nearly stationary; somewhat variable speeds
Distance Consistency	15/15	Distance variance ±13m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 339.6000000000000227373675443232059478759765625,
    "avg_distance_m": 352.5,
    "distance_consistency_m": 13.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 121.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 7302,
    "speed_a_avg": 0.1700000000000000122124532708767219446599483489990234375,
    "speed_a_std": 0.54000000000000003552713678800500929355621337890625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1700000000000000122124532708767219446599483489990234375,
            "max_sog": 1.6999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T09:41:57+00:00",
        "end": "2026-04-07T11:43:39+00:00"
    },
    "points_count": {
        "vessel_a": 10,
        "vessel_b": 10
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 74,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 340m, avg 352m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 122 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b113m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 340m, avg 352m) for 122 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 09:31 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 36m
Data Points: 50 AIS positions
Period: 2026-04-07T09:52:19+00:00 to 2026-04-07T16:28:23+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 50,
    "first_point": {
        "ts": "2026-04-07T09:52:19+00:00",
        "lat": 34.70816669999999959372871671803295612335205078125,
        "lon": 33.31994999999999862438926356844604015350341796875
    },
    "last_point": {
        "ts": "2026-04-07T16:28:23+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 09:31 UTC 75.0% ▼

Duration: 6h 36m
Radius: 6 meters
Data Points: 50 AIS positions
Centroid: 34.7082, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 5.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 50,
    "centroid": {
        "lat": 34.7081506659999803332539158873260021209716796875,
        "lon": 33.31995700800001003472061711363494396209716796875
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.319933300000002418528310954570770263671875,
        "max_lat": 34.70819999999999794226823723874986171722412109375,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 08:04 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 33m
Data Points: 35 AIS positions
Period: 2026-04-07T08:25:20+00:00 to 2026-04-07T14:58:19+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-04-07T08:25:20+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31994999999999862438926356844604015350341796875
    },
    "last_point": {
        "ts": "2026-04-07T14:58:19+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 08:04 UTC 75.0% ▼

Duration: 6h 33m
Radius: 7 meters
Data Points: 35 AIS positions
Centroid: 34.7082, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 7.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 393,
    "points": 35,
    "centroid": {
        "lat": 34.70815333428571847207422251813113689422607421875,
        "lon": 33.3199590571428387875130283646285533905029296875
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.319933300000002418528310954570770263671875,
        "max_lat": 34.70821670000000125355654745362699031829833984375,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 07:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 6m
Data Points: 38 AIS positions
Period: 2026-04-07T07:01:21+00:00 to 2026-04-07T13:07:21+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 366,
    "points_in_zone": 38,
    "first_point": {
        "ts": "2026-04-07T07:01:21+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T13:07:21+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31998329999999697292878408916294574737548828125
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 07:01 UTC 75.0% ▼

Duration: 6h 6m
Radius: 7 meters
Data Points: 38 AIS positions
Centroid: 34.7082, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 7.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 366,
    "points": 38,
    "centroid": {
        "lat": 34.708153510526329910135245881974697113037109375,
        "lon": 33.3199583473683986767355236224830150604248046875
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.319933300000002418528310954570770263671875,
        "max_lat": 34.70821670000000125355654745362699031829833984375,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Sts🛰️✗ Istanbul Black Sea Surveillance Zone

Apr 7, 2026 07:00 UTC 77/100 ▼

Vessel A: IMO 9517288 (ALFA SEA) Panama

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 340 meters
Average Distance: 350 meters
Duration: 4h 43m
Period: 2026-04-07T07:00:23+00:00 to 2026-04-07T11:43:39+00:00
Vessel A Avg Speed: 0.1 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 77/100

Moderate-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 340m, avg 350m) for 283 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	10/25	Min distance 340m, avg 350m
Duration	25/25	Duration 283 minutes
Speed Stability	17/20	both nearly stationary; stable speeds
Distance Consistency	15/15	Distance variance ±12m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-07T13:45:02.101948+00:00

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 339.6000000000000227373675443232059478759765625,
    "avg_distance_m": 350.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 12.5,
    "duration_minutes": 283.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 16996,
    "speed_a_avg": 0.13000000000000000444089209850062616169452667236328125,
    "speed_a_std": 0.4699999999999999733546474089962430298328399658203125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.13000000000000000444089209850062616169452667236328125,
            "max_sog": 1.6999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T07:00:23+00:00",
        "end": "2026-04-07T11:43:39+00:00"
    },
    "points_count": {
        "vessel_a": 13,
        "vessel_b": 13
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 77,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 340m, avg 350m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 283 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: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 340m, avg 350m) for 283 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70922399999999896635927143506705760955810546875,
            "lon": 33.321372400000001334774424321949481964111328125
        },
        "time_window": {
            "start_ts": "2026-04-07T07:00:23+00:00",
            "end_ts": "2026-04-07T11:43:39+00:00"
        },
        "searched_at": "2026-04-07T13:45:02.101948+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 06:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 30m
Data Points: 44 AIS positions
Period: 2026-04-07T06:37:23+00:00 to 2026-04-07T13:07:21+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 390,
    "points_in_zone": 44,
    "first_point": {
        "ts": "2026-04-07T06:37:23+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T13:07:21+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31998329999999697292878408916294574737548828125
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 06:01 UTC 75.0% ▼

Duration: 6h 30m
Radius: 8 meters
Data Points: 44 AIS positions
Centroid: 34.7082, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 7.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 390,
    "points": 44,
    "centroid": {
        "lat": 34.70815075454546416722223511897027492523193359375,
        "lon": 33.31995796818178945386534905992448329925537109375
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.319933300000002418528310954570770263671875,
        "max_lat": 34.70821670000000125355654745362699031829833984375,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 7, 2026 06:00 UTC 77/100 ▼

Vessel A: IMO 9517288 (ALFA SEA) Panama

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 340 meters
Average Distance: 349 meters
Duration: 5h 7m
Period: 2026-04-07T06:36:21+00:00 to 2026-04-07T11:43:39+00:00
Vessel A Avg Speed: 0.1 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 77/100

Moderate-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 340m, avg 349m) for 307 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	10/25	Min distance 340m, avg 349m
Duration	25/25	Duration 307 minutes
Speed Stability	17/20	both nearly stationary; stable speeds
Distance Consistency	15/15	Distance variance ±11m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 339.6000000000000227373675443232059478759765625,
    "avg_distance_m": 349.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 11,
    "duration_minutes": 307.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 18438,
    "speed_a_avg": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.409999999999999975575093458246556110680103302001953125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11000000000000000055511151231257827021181583404541015625,
            "max_sog": 1.6999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T06:36:21+00:00",
        "end": "2026-04-07T11:43:39+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 77,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 340m, avg 349m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 307 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b111m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 340m, avg 349m) for 307 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 7, 2026 05:58 UTC 80/100 ▼

Vessel A: IMO 9517288 (ALFA SEA) Panama

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 338 meters
Average Distance: 347 meters
Duration: 6h 23m
Period: 2026-04-07T05:03:16+00:00 to 2026-04-07T11:26:22+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 338m, avg 347m) for 383 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	10/25	Min distance 338m, avg 347m
Duration	25/25	Duration 383 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±10m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 337.5,
    "avg_distance_m": 346.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 9.699999999999999289457264239899814128875732421875,
    "duration_minutes": 383.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 22986,
    "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": "2026-04-07T05:03:16+00:00",
        "end": "2026-04-07T11:26:22+00:00"
    },
    "points_count": {
        "vessel_a": 20,
        "vessel_b": 20
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 338m, avg 347m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 383 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 338m, avg 347m) for 383 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 05:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 27m
Data Points: 53 AIS positions
Period: 2026-04-07T05:16:20+00:00 to 2026-04-07T11:43:23+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 387.1000000000000227373675443232059478759765625,
    "points_in_zone": 53,
    "first_point": {
        "ts": "2026-04-07T05:16:20+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T11:43:23+00:00",
        "lat": 34.70816669999999959372871671803295612335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 05:01 UTC 75.0% ▼

Duration: 6h 27m
Radius: 8 meters
Data Points: 53 AIS positions
Centroid: 34.7082, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 7.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 387.1000000000000227373675443232059478759765625,
    "points": 53,
    "centroid": {
        "lat": 34.70815031132074324204950244165956974029541015625,
        "lon": 33.31995882264151731533274869434535503387451171875
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.319933300000002418528310954570770263671875,
        "max_lat": 34.70821670000000125355654745362699031829833984375,
        "max_lon": 33.31996670000000193567757378332316875457763671875
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 7, 2026 04:19 UTC 80/100 ▼

Vessel A: IMO 9430739 (SRIWANGI III) Singapore

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 331 meters
Average Distance: 336 meters
Duration: 5h 7m
Period: 2026-04-07T04:48:14+00:00 to 2026-04-07T09:55:46+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 80/100

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

View scoring breakdown

Factor	Score	Detail
Distance Tightness	10/25	Min distance 330m, avg 336m
Duration	25/25	Duration 308 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±5m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 330.5,
    "avg_distance_m": 336.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 4.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 307.5,
    "overlap_duration_s": 18452,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T04:48:14+00:00",
        "end": "2026-04-07T09:55:46+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 330m, avg 336m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 308 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 336m) for 308 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Istanbul Black Sea Surveillance Zone

Apr 7, 2026 04:06 UTC 80/100 ▼

Vessel A: IMO 9517288 (ALFA SEA) Panama

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 338 meters
Average Distance: 346 meters
Duration: 6h 9m
Period: 2026-04-07T04:06:15+00:00 to 2026-04-07T10:15:54+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 338m, avg 346m) for 370 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	10/25	Min distance 338m, avg 346m
Duration	25/25	Duration 370 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±8m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-07T10:45:01.279496+00:00

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 337.5,
    "avg_distance_m": 346.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 8.5,
    "duration_minutes": 369.6000000000000227373675443232059478759765625,
    "overlap_duration_s": 22179,
    "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": "2026-04-07T04:06:15+00:00",
        "end": "2026-04-07T10:15:54+00:00"
    },
    "points_count": {
        "vessel_a": 26,
        "vessel_b": 26
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 338m, avg 346m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 370 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b18m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 338m, avg 346m) for 370 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70919909999999930505509837530553340911865234375,
            "lon": 33.3213568999999978359483066014945507049560546875
        },
        "time_window": {
            "start_ts": "2026-04-07T04:06:15+00:00",
            "end_ts": "2026-04-07T10:15:54+00:00"
        },
        "searched_at": "2026-04-07T10:45:01.279496+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 04:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 33m
Data Points: 52 AIS positions
Period: 2026-04-07T04:52:21+00:00 to 2026-04-07T11:25:23+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 52,
    "first_point": {
        "ts": "2026-04-07T04:52:21+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T11:25:23+00:00",
        "lat": 34.70816669999999959372871671803295612335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 04:01 UTC 75.0% ▼

Duration: 6h 33m
Radius: 8 meters
Data Points: 52 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 7.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 393,
    "points": 52,
    "centroid": {
        "lat": 34.70814903269229034776799380779266357421875,
        "lon": 33.31995899230769708765365066938102245330810546875
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.319933300000002418528310954570770263671875,
        "max_lat": 34.70821670000000125355654745362699031829833984375,
        "max_lon": 33.31996670000000193567757378332316875457763671875
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 7, 2026 03:12 UTC 80/100 ▼

Vessel A: IMO 9430739 (SRIWANGI III) Singapore

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 331 meters
Average Distance: 335 meters
Duration: 6h 13m
Period: 2026-04-07T03:42:08+00:00 to 2026-04-07T09:55:46+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 80/100

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

View scoring breakdown

Factor	Score	Detail
Distance Tightness	10/25	Min distance 330m, avg 335m
Duration	25/25	Duration 374 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±4m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 330.5,
    "avg_distance_m": 335.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 4,
    "duration_minutes": 373.6000000000000227373675443232059478759765625,
    "overlap_duration_s": 22418,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T03:42:08+00:00",
        "end": "2026-04-07T09:55:46+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 330m, avg 335m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 374 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 330m, avg 335m) for 374 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 7, 2026 03:01 UTC 80/100 ▼

Vessel A: IMO 9517288 (ALFA SEA) Panama

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 338 meters
Average Distance: 347 meters
Duration: 6h 26m
Period: 2026-04-07T03:40:30+00:00 to 2026-04-07T10:06:53+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 338m, avg 346m) for 386 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	10/25	Min distance 338m, avg 346m
Duration	25/25	Duration 386 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±8m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 337.5,
    "avg_distance_m": 346.5,
    "distance_consistency_m": 7.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 386.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 23183,
    "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": "2026-04-07T03:40:30+00:00",
        "end": "2026-04-07T10:06:53+00:00"
    },
    "points_count": {
        "vessel_a": 31,
        "vessel_b": 31
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 338m, avg 346m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 386 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b18m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 338m, avg 346m) for 386 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 03:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 35m
Data Points: 71 AIS positions
Period: 2026-04-07T03:40:21+00:00 to 2026-04-07T10:16:18+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 395.8999999999999772626324556767940521240234375,
    "points_in_zone": 71,
    "first_point": {
        "ts": "2026-04-07T03:40:21+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31994999999999862438926356844604015350341796875
    },
    "last_point": {
        "ts": "2026-04-07T10:16:18+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31994999999999862438926356844604015350341796875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 03:01 UTC 75.0% ▼

Duration: 6h 35m
Radius: 8 meters
Data Points: 71 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 8,
    "duration_minutes": 395.8999999999999772626324556767940521240234375,
    "points": 71,
    "centroid": {
        "lat": 34.708147880281700281557277776300907135009765625,
        "lon": 33.3199579971830956992562278173863887786865234375
    },
    "bbox": {
        "min_lat": 34.7081333000000000765794538892805576324462890625,
        "min_lon": 33.319933300000002418528310954570770263671875,
        "max_lat": 34.70821670000000125355654745362699031829833984375,
        "max_lon": 33.31996670000000193567757378332316875457763671875
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Sts🛰️✗ Istanbul Black Sea Surveillance Zone

Apr 7, 2026 02:08 UTC 85/100 ▼

Vessel A: IMO 9430739 (SRIWANGI III) Singapore

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 270 meters
Average Distance: 330 meters
Duration: 5h 15m
Period: 2026-04-07T02:08:30+00:00 to 2026-04-07T07:24:15+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

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

View scoring breakdown

Factor	Score	Detail
Distance Tightness	15/25	Min distance 270m, avg 330m
Duration	25/25	Duration 316 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±16m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

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

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 270,
    "avg_distance_m": 329.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 16.10000000000000142108547152020037174224853515625,
    "duration_minutes": 315.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 18945,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T02:08:30+00:00",
        "end": "2026-04-07T07:24:15+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 270m, avg 330m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 316 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b116m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 330m) for 316 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70895159999999890487742959521710872650146484375,
            "lon": 33.3214808000000033416654332540929317474365234375
        },
        "time_window": {
            "start_ts": "2026-04-07T02:08:30+00:00",
            "end_ts": "2026-04-07T07:24:15+00:00"
        },
        "searched_at": "2026-04-07T08:30:04.593943+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Istanbul Black Sea Surveillance Zone

Apr 7, 2026 02:02 UTC 80/100 ▼

Vessel A: IMO 9517288 (ALFA SEA) Panama

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 338 meters
Average Distance: 346 meters
Duration: 5h 13m
Period: 2026-04-07T02:02:04+00:00 to 2026-04-07T07:15:24+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 338m, avg 346m) for 313 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	10/25	Min distance 338m, avg 346m
Duration	25/25	Duration 313 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±5m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-07T08:45:03.732490+00:00

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 337.5,
    "avg_distance_m": 346,
    "distance_consistency_m": 5.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 313.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 18800,
    "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": "2026-04-07T02:02:04+00:00",
        "end": "2026-04-07T07:15:24+00:00"
    },
    "points_count": {
        "vessel_a": 44,
        "vessel_b": 44
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 338m, avg 346m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 313 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 338m, avg 346m) for 313 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70919820000000299842213280498981475830078125,
            "lon": 33.32135720000000134177753352560102939605712890625
        },
        "time_window": {
            "start_ts": "2026-04-07T02:02:04+00:00",
            "end_ts": "2026-04-07T07:15:24+00:00"
        },
        "searched_at": "2026-04-07T08:45:03.732490+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 02:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 27m
Data Points: 81 AIS positions
Period: 2026-04-07T02:01:22+00:00 to 2026-04-07T08:28:21+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 387,
    "points_in_zone": 81,
    "first_point": {
        "ts": "2026-04-07T02:01:22+00:00",
        "lat": 34.70816669999999959372871671803295612335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T08:28:21+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31994999999999862438926356844604015350341796875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 02:01 UTC 75.0% ▼

Duration: 6h 27m
Radius: 7 meters
Data Points: 81 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 6.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 387,
    "points": 81,
    "centroid": {
        "lat": 34.70814752345679465861394419334828853607177734375,
        "lon": 33.319959892592549977052840404212474822998046875
    },
    "bbox": {
        "min_lat": 34.70811669999999793390088598243892192840576171875,
        "min_lon": 33.31994999999999862438926356844604015350341796875,
        "max_lat": 34.70819999999999794226823723874986171722412109375,
        "max_lon": 33.32003329999999863275661482475697994232177734375
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Sts🛰️✗ Istanbul Black Sea Surveillance Zone

Apr 7, 2026 01:15 UTC 85/100 ▼

Vessel A: IMO 9430739 (SRIWANGI III) Singapore

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 270 meters
Average Distance: 331 meters
Duration: 6h 8m
Period: 2026-04-07T01:15:34+00:00 to 2026-04-07T07:24:15+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

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

View scoring breakdown

Factor	Score	Detail
Distance Tightness	15/25	Min distance 270m, avg 331m
Duration	25/25	Duration 369 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±15m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

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

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 270,
    "avg_distance_m": 330.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 15,
    "duration_minutes": 368.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 22121,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T01:15:34+00:00",
        "end": "2026-04-07T07:24:15+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 270m, avg 331m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 369 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b115m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 331m) for 369 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.708953100000002223168849013745784759521484375,
            "lon": 33.3214856999999966546965879388153553009033203125
        },
        "time_window": {
            "start_ts": "2026-04-07T01:15:34+00:00",
            "end_ts": "2026-04-07T07:24:15+00:00"
        },
        "searched_at": "2026-04-07T07:45:04.085621+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Istanbul Black Sea Surveillance Zone

Apr 7, 2026 01:03 UTC 80/100 ▼

Vessel A: IMO 9517288 (ALFA SEA) Panama

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 338 meters
Average Distance: 346 meters
Duration: 6h 12m
Period: 2026-04-07T01:03:20+00:00 to 2026-04-07T07:15:24+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 338m, avg 346m) for 372 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	10/25	Min distance 338m, avg 346m
Duration	25/25	Duration 372 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±5m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-04-07T07:45:09.224129+00:00

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 337.5,
    "avg_distance_m": 345.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 4.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 372.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 22324,
    "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": "2026-04-07T01:03:20+00:00",
        "end": "2026-04-07T07:15:24+00:00"
    },
    "points_count": {
        "vessel_a": 61,
        "vessel_b": 61
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 338m, avg 346m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 372 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 338m, avg 346m) for 372 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7091984999999993988240021280944347381591796875,
            "lon": 33.321354700000000548243406228721141815185546875
        },
        "time_window": {
            "start_ts": "2026-04-07T01:03:20+00:00",
            "end_ts": "2026-04-07T07:15:24+00:00"
        },
        "searched_at": "2026-04-07T07:45:09.224129+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 01:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 33m
Data Points: 82 AIS positions
Period: 2026-04-07T01:52:21+00:00 to 2026-04-07T08:25:20+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 82,
    "first_point": {
        "ts": "2026-04-07T01:52:21+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T08:25:20+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31994999999999862438926356844604015350341796875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 01:01 UTC 75.0% ▼

Duration: 6h 33m
Radius: 7 meters
Data Points: 82 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 6.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 393,
    "points": 82,
    "centroid": {
        "lat": 34.7081477573170786854461766779422760009765625,
        "lon": 33.3199601792682500445152982138097286224365234375
    },
    "bbox": {
        "min_lat": 34.70811669999999793390088598243892192840576171875,
        "min_lon": 33.31994999999999862438926356844604015350341796875,
        "max_lat": 34.70819999999999794226823723874986171722412109375,
        "max_lon": 33.32003329999999863275661482475697994232177734375
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 7, 2026 00:02 UTC 85/100 ▼

Vessel A: IMO 9517288 (ALFA SEA) Panama

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 278 meters
Average Distance: 345 meters
Duration: 6h 31m
Period: 2026-04-07T00:43:32+00:00 to 2026-04-07T07:15:24+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 278m, avg 345m) for 392 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	15/25	Min distance 278m, avg 345m
Duration	25/25	Duration 392 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±10m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 278.3999999999999772626324556767940521240234375,
    "avg_distance_m": 344.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 9.5,
    "duration_minutes": 391.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 23512,
    "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": "2026-04-07T00:43:32+00:00",
        "end": "2026-04-07T07:15:24+00:00"
    },
    "points_count": {
        "vessel_a": 66,
        "vessel_b": 66
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 278m, avg 345m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 392 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 278m, avg 345m) for 392 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 7, 2026 00:02 UTC 85/100 ▼

Vessel A: IMO 9430739 (SRIWANGI III) Singapore

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 270 meters
Average Distance: 333 meters
Duration: 6h 30m
Period: 2026-04-07T00:41:34+00:00 to 2026-04-07T07:12:14+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

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

View scoring breakdown

Factor	Score	Detail
Distance Tightness	15/25	Min distance 270m, avg 332m
Duration	25/25	Duration 391 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±16m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 270,
    "avg_distance_m": 332.5,
    "distance_consistency_m": 16.39999999999999857891452847979962825775146484375,
    "duration_minutes": 390.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 23440,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-07T00:41:34+00:00",
        "end": "2026-04-07T07:12:14+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 270m, avg 332m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 391 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b116m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 332m) for 391 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 7, 2026 00:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 32m
Data Points: 94 AIS positions
Period: 2026-04-07T00:52:22+00:00 to 2026-04-07T07:25:18+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 392.8999999999999772626324556767940521240234375,
    "points_in_zone": 94,
    "first_point": {
        "ts": "2026-04-07T00:52:22+00:00",
        "lat": 34.70811669999999793390088598243892192840576171875,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T07:25:18+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 7, 2026 00:01 UTC 75.0% ▼

Duration: 6h 32m
Radius: 7 meters
Data Points: 94 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 6.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 392.8999999999999772626324556767940521240234375,
    "points": 94,
    "centroid": {
        "lat": 34.7081476893616951429066830314695835113525390625,
        "lon": 33.31995941276593242719172849319875240325927734375
    },
    "bbox": {
        "min_lat": 34.70811669999999793390088598243892192840576171875,
        "min_lon": 33.31994999999999862438926356844604015350341796875,
        "max_lat": 34.70819999999999794226823723874986171722412109375,
        "max_lon": 33.32003329999999863275661482475697994232177734375
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 6, 2026 23:08 UTC 82/100 ▼

Vessel A: IMO 9430739 (SRIWANGI III) Singapore

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 270 meters
Average Distance: 339 meters
Duration: 6h 30m
Period: 2026-04-06T23:32:47+00:00 to 2026-04-07T06:03:07+00:00
Vessel A Avg Speed: 0.1 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 82/100

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

View scoring breakdown

Factor	Score	Detail
Distance Tightness	15/25	Min distance 270m, avg 339m
Duration	25/25	Duration 390 minutes
Speed Stability	17/20	both nearly stationary; stable speeds
Distance Consistency	15/15	Distance variance ±29m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 270,
    "avg_distance_m": 338.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 29.39999999999999857891452847979962825775146484375,
    "duration_minutes": 390.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 23420,
    "speed_a_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.419999999999999984456877655247808434069156646728515625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 2
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T23:32:47+00:00",
        "end": "2026-04-07T06:03:07+00:00"
    },
    "points_count": {
        "vessel_a": 23,
        "vessel_b": 23
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 82,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 270m, avg 339m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 390 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b129m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 339m) for 390 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 6, 2026 23:04 UTC 85/100 ▼

Vessel A: IMO 9517288 (ALFA SEA) Panama

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 278 meters
Average Distance: 345 meters
Duration: 6h 31m
Period: 2026-04-06T23:40:23+00:00 to 2026-04-07T06:12:16+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 278m, avg 345m) for 392 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	15/25	Min distance 278m, avg 345m
Duration	25/25	Duration 392 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±10m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 278.3999999999999772626324556767940521240234375,
    "avg_distance_m": 344.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 9.699999999999999289457264239899814128875732421875,
    "duration_minutes": 391.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 23513,
    "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": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T23:40:23+00:00",
        "end": "2026-04-07T06:12:16+00:00"
    },
    "points_count": {
        "vessel_a": 70,
        "vessel_b": 70
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 278m, avg 345m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 392 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 278m, avg 345m) for 392 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 6, 2026 23:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 36m
Data Points: 103 AIS positions
Period: 2026-04-06T23:40:23+00:00 to 2026-04-07T06:16:21+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 103,
    "first_point": {
        "ts": "2026-04-06T23:40:23+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31994999999999862438926356844604015350341796875
    },
    "last_point": {
        "ts": "2026-04-07T06:16:21+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31994999999999862438926356844604015350341796875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 6, 2026 23:01 UTC 75.0% ▼

Duration: 6h 36m
Radius: 7 meters
Data Points: 103 AIS positions
Centroid: 34.7081, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 6.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 396,
    "points": 103,
    "centroid": {
        "lat": 34.7081493504854137199799879454076290130615234375,
        "lon": 33.31995842621356729296167031861841678619384765625
    },
    "bbox": {
        "min_lat": 34.70811669999999793390088598243892192840576171875,
        "min_lon": 33.31994999999999862438926356844604015350341796875,
        "max_lat": 34.70819999999999794226823723874986171722412109375,
        "max_lon": 33.32003329999999863275661482475697994232177734375
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 6, 2026 22:11 UTC 82/100 ▼

Vessel A: IMO 9430739 (SRIWANGI III) Singapore

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 270 meters
Average Distance: 338 meters
Duration: 6h 21m
Period: 2026-04-06T22:26:44+00:00 to 2026-04-07T04:48:14+00:00
Vessel A Avg Speed: 0.1 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 82/100

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

View scoring breakdown

Factor	Score	Detail
Distance Tightness	15/25	Min distance 270m, avg 338m
Duration	25/25	Duration 382 minutes
Speed Stability	17/20	both nearly stationary; stable speeds
Distance Consistency	15/15	Distance variance ±28m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 270,
    "avg_distance_m": 338,
    "distance_consistency_m": 27.699999999999999289457264239899814128875732421875,
    "duration_minutes": 381.5,
    "overlap_duration_s": 22890,
    "speed_a_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_a_std": 0.39000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 2
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T22:26:44+00:00",
        "end": "2026-04-07T04:48:14+00:00"
    },
    "points_count": {
        "vessel_a": 26,
        "vessel_b": 26
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 82,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 270m, avg 338m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 382 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b128m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 338m) for 382 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 6, 2026 22:01 UTC 85/100 ▼

Vessel A: IMO 9517288 (ALFA SEA) Panama

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 278 meters
Average Distance: 345 meters
Duration: 6h 32m
Period: 2026-04-06T22:46:21+00:00 to 2026-04-07T05:18:19+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 278m, avg 345m) for 392 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	15/25	Min distance 278m, avg 345m
Duration	25/25	Duration 392 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±9m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 278.3999999999999772626324556767940521240234375,
    "avg_distance_m": 344.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 9.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 392,
    "overlap_duration_s": 23518,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T22:46:21+00:00",
        "end": "2026-04-07T05:18:19+00:00"
    },
    "points_count": {
        "vessel_a": 75,
        "vessel_b": 75
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 278m, avg 345m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 392 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 278m, avg 345m) for 392 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 6, 2026 22:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 33m
Data Points: 106 AIS positions
Period: 2026-04-06T22:52:20+00:00 to 2026-04-07T05:25:21+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 106,
    "first_point": {
        "ts": "2026-04-06T22:52:20+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T05:25:21+00:00",
        "lat": 34.7081333000000000765794538892805576324462890625,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 6, 2026 22:01 UTC 75.0% ▼

Duration: 6h 33m
Radius: 7 meters
Data Points: 106 AIS positions
Centroid: 34.7082, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 6.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 393,
    "points": 106,
    "centroid": {
        "lat": 34.70815031415093443456498789601027965545654296875,
        "lon": 33.3199583452830125906984903849661350250244140625
    },
    "bbox": {
        "min_lat": 34.70811669999999793390088598243892192840576171875,
        "min_lon": 33.31994999999999862438926356844604015350341796875,
        "max_lat": 34.70819999999999794226823723874986171722412109375,
        "max_lon": 33.32003329999999863275661482475697994232177734375
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 6, 2026 21:02 UTC 82/100 ▼

Vessel A: IMO 9430739 (SRIWANGI III) Singapore

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 270 meters
Average Distance: 338 meters
Duration: 6h 15m
Period: 2026-04-06T21:26:47+00:00 to 2026-04-07T03:42:08+00:00
Vessel A Avg Speed: 0.1 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 82/100

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

View scoring breakdown

Factor	Score	Detail
Distance Tightness	15/25	Min distance 270m, avg 338m
Duration	25/25	Duration 375 minutes
Speed Stability	17/20	both nearly stationary; stable speeds
Distance Consistency	15/15	Distance variance ±28m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 563223700,
        "imo": 9430739,
        "name": "SRIWANGI III",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 270,
    "avg_distance_m": 338.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 28.300000000000000710542735760100185871124267578125,
    "duration_minutes": 375.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 22521,
    "speed_a_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_a_std": 0.40000000000000002220446049250313080847263336181640625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 2
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T21:26:47+00:00",
        "end": "2026-04-07T03:42:08+00:00"
    },
    "points_count": {
        "vessel_a": 25,
        "vessel_b": 25
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 82,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 270m, avg 338m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 375 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b128m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SRIWANGI III and WECO MADELEINE) maintained close proximity (min 270m, avg 338m) for 375 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 6, 2026 21:01 UTC 85/100 ▼

Vessel A: IMO 9517288 (ALFA SEA) Panama

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 278 meters
Average Distance: 345 meters
Duration: 6h 28m
Period: 2026-04-06T21:46:27+00:00 to 2026-04-07T04:15:22+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 278m, avg 345m) for 389 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	15/25	Min distance 278m, avg 345m
Duration	25/25	Duration 389 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±9m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 278.3999999999999772626324556767940521240234375,
    "avg_distance_m": 345,
    "distance_consistency_m": 9.300000000000000710542735760100185871124267578125,
    "duration_minutes": 388.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 23335,
    "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": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T21:46:27+00:00",
        "end": "2026-04-07T04:15:22+00:00"
    },
    "points_count": {
        "vessel_a": 75,
        "vessel_b": 75
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 278m, avg 345m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 389 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 278m, avg 345m) for 389 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 6, 2026 21:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 36m
Data Points: 106 AIS positions
Period: 2026-04-06T21:52:20+00:00 to 2026-04-07T04:28:24+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 106,
    "first_point": {
        "ts": "2026-04-06T21:52:20+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T04:28:24+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 6, 2026 21:01 UTC 75.0% ▼

Duration: 6h 36m
Radius: 7 meters
Data Points: 106 AIS positions
Centroid: 34.7082, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 6.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 106,
    "centroid": {
        "lat": 34.7081525188679052007501013576984405517578125,
        "lon": 33.31995834528303390698056318797171115875244140625
    },
    "bbox": {
        "min_lat": 34.70811669999999793390088598243892192840576171875,
        "min_lon": 33.31994999999999862438926356844604015350341796875,
        "max_lat": 34.70819999999999794226823723874986171722412109375,
        "max_lon": 33.32003329999999863275661482475697994232177734375
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Zone Dwell Istanbul Black Sea Surveillance Zone

Apr 6, 2026 20:01 UTC 80.0% ▼

Zone: Istanbul Black Sea Surveillance Zone
Duration: 6h 33m
Data Points: 99 AIS positions
Period: 2026-04-06T20:55:20+00:00 to 2026-04-07T03:28:24+00:00

Show Raw Evidence JSON

{
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "dwell_minutes": 393.1000000000000227373675443232059478759765625,
    "points_in_zone": 99,
    "first_point": {
        "ts": "2026-04-06T20:55:20+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31996670000000193567757378332316875457763671875
    },
    "last_point": {
        "ts": "2026-04-07T03:28:24+00:00",
        "lat": 34.7081500000000033878677641041576862335205078125,
        "lon": 33.31994999999999862438926356844604015350341796875
    }
}

Methodology: 2026.01.18

Loiter Istanbul Black Sea Surveillance Zone

Apr 6, 2026 20:01 UTC 75.0% ▼

Duration: 6h 33m
Radius: 7 meters
Data Points: 99 AIS positions
Centroid: 34.7082, 33.3200
Zone: Istanbul Black Sea Surveillance Zone

Show Raw Evidence JSON

{
    "radius_m": 6.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 393.1000000000000227373675443232059478759765625,
    "points": 99,
    "centroid": {
        "lat": 34.70815202222220108296824037097394466400146484375,
        "lon": 33.31996028484849148298962973058223724365234375
    },
    "bbox": {
        "min_lat": 34.70811669999999793390088598243892192840576171875,
        "min_lon": 33.31994999999999862438926356844604015350341796875,
        "max_lat": 34.70819999999999794226823723874986171722412109375,
        "max_lon": 33.32003329999999863275661482475697994232177734375
    },
    "zone_id": "discovered_029"
}

Methodology: 2026.01.18

Sts Istanbul Black Sea Surveillance Zone

Apr 6, 2026 20:01 UTC 85/100 ▼

Vessel A: IMO 9517288 (ALFA SEA) Panama

Vessel B: IMO 9693824 (WECO MADELEINE) LIBERIA

Minimum Distance: 278 meters
Average Distance: 345 meters
Duration: 6h 23m
Period: 2026-04-06T20:55:20+00:00 to 2026-04-07T03:18:36+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Istanbul Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 278m, avg 345m) for 383 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	15/25	Min distance 278m, avg 345m
Duration	25/25	Duration 383 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±9m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636093045,
        "imo": 9693824,
        "name": "WECO MADELEINE",
        "flag": "LIBERIA"
    },
    "min_distance_m": 278.3999999999999772626324556767940521240234375,
    "avg_distance_m": 345,
    "distance_consistency_m": 9.199999999999999289457264239899814128875732421875,
    "duration_minutes": 383.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 22996,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-04-06T20:55:20+00:00",
        "end": "2026-04-07T03:18:36+00:00"
    },
    "points_count": {
        "vessel_a": 78,
        "vessel_b": 78
    },
    "zone_id": "discovered_029",
    "zone_name": "Eastern Mediterranean Sanctions Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 278m, avg 345m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 383 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Sanctions Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and WECO MADELEINE) maintained close proximity (min 278m, avg 345m) for 383 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Sanctions Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Time (UTC)	Lat	Lon	Speed	Course	Zone
Jul 29 06:25	34.8384	129.3939	13.2 kn	41.3°	Strait of Gibraltar Surveillance Zone
Jul 29 05:39	34.7071	129.2526	13.4 kn	45.3°	Strait of Gibraltar Surveillance Zone
Jul 24 02:35	-34.6370	18.4433	11.7 kn	110.9°	Central Mediterranean Sanctions Monitoring Zone
Jul 24 02:20	-34.6134	18.3943	11.9 kn	113.3°	Central Mediterranean Sanctions Monitoring Zone
Jul 24 02:11	-34.6004	18.3655	11.4 kn	114.5°	Central Mediterranean Sanctions Monitoring Zone
Jul 24 02:08	-34.5954	18.3537	11.2 kn	115.9°	Central Mediterranean Sanctions Monitoring Zone
Jul 24 02:07	-34.5938	18.3498	11.0 kn	118.1°	Central Mediterranean Sanctions Monitoring Zone
Jul 24 02:04	-34.5898	18.3402	11.5 kn	113.9°	Central Mediterranean Sanctions Monitoring Zone
Jul 24 02:03	-34.5884	18.3369	11.3 kn	121.2°	Central Mediterranean Sanctions Monitoring Zone
Jul 24 01:55	-34.5766	18.3086	11.8 kn	104.0°	Central Mediterranean Sanctions Monitoring Zone
Jul 24 01:52	-34.5735	18.3007	11.1 kn	117.6°	Central Mediterranean Sanctions Monitoring Zone
Jul 24 01:46	-34.5642	18.2788	11.6 kn	117.9°	Central Mediterranean Sanctions Monitoring Zone
Jul 24 01:42	-34.5592	18.2671	11.0 kn	126.8°	Central Mediterranean Sanctions Monitoring Zone
Jul 24 01:35	-34.5481	18.2414	11.6 kn	104.5°	Central Mediterranean Sanctions Monitoring Zone
Jul 24 01:27	-34.5373	18.2174	10.8 kn	125.5°	Central Mediterranean Sanctions Monitoring Zone
Jul 24 01:25	-34.5334	18.2088	10.7 kn	122.1°	Central Mediterranean Sanctions Monitoring Zone
Jul 23 23:36	-34.2110	18.1884	11.5 kn	173.2°	Cape Peninsula Surveillance Zone
Jul 23 23:35	-34.2078	18.1880	11.5 kn	179.8°	Cape Peninsula Surveillance Zone
Jul 23 23:34	-34.2046	18.1875	11.8 kn	170.4°	Cape Peninsula Surveillance Zone
Jul 23 23:32	-34.1980	18.1863	12.0 kn	176.5°	Cape Peninsula Surveillance Zone

WECO MADELEINE

IMO 9693824

Vessel information

Detected Events (100)

Confidence Analysis

🛰️ Satellite Corroboration

Confidence Analysis

🛰️ Satellite Corroboration

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Confidence Analysis

🛰️ Satellite Corroboration

Confidence Analysis

Confidence Analysis

Confidence Analysis

🛰️ Satellite Corroboration

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🛰️ Satellite Corroboration

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🛰️ Satellite Corroboration

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Recent Position Data

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WECO MADELEINE

IMO 9693824

Vessel information

Detected Events (100)

Confidence Analysis

🛰️ Satellite Corroboration

Confidence Analysis

🛰️ Satellite Corroboration

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🛰️ Satellite Corroboration

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Confidence Analysis

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🛰️ Satellite Corroboration

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🛰️ Satellite Corroboration

Confidence Analysis

🛰️ Satellite Corroboration

Confidence Analysis

🛰️ Satellite Corroboration

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Confidence Analysis

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