AVANTI

IMO 9403334

Vessel information

Vessel Name AVANTI
IMO Number 9403334
MMSI 538008411
Vessel Type Tanker
Flag 🇲🇭 MARSHALL ISLANDS
Call Sign V7A2327
Length 180 m
Beam 32 m

Detected Events (100)

Zone Dwell Malacca Strait Surveillance Zone
Sep 9, 2026 10:20 UTC 80.0% ▼
  • Zone: Malacca Strait Surveillance Zone
  • Duration: 3h 12m
  • Data Points: 5 AIS positions
  • Period: 2026-09-09T10:20:59+00:00 to 2026-09-09T13:32:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_160",
    "zone_name": "Malacca Strait Surveillance Zone",
    "dwell_minutes": 192,
    "points_in_zone": 5,
    "first_point": {
        "ts": "2026-09-09T10:20:59+00:00",
        "lat": 35.18055170000000231311787501908838748931884765625,
        "lon": 35.89723000000000041609382606111466884613037109375
    },
    "last_point": {
        "ts": "2026-09-09T13:32:59+00:00",
        "lat": 35.18018000000000000682121026329696178436279296875,
        "lon": 35.89730670000000145591911859810352325439453125
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Surveillance Zone
Sep 9, 2026 06:02 UTC 80.0% ▼
  • Zone: Malacca Strait Surveillance Zone
  • Duration: 4h 24m
  • Data Points: 5 AIS positions
  • Period: 2026-09-09T06:02:59+00:00 to 2026-09-09T10:26:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_160",
    "zone_name": "Malacca Strait Surveillance Zone",
    "dwell_minutes": 264,
    "points_in_zone": 5,
    "first_point": {
        "ts": "2026-09-09T06:02:59+00:00",
        "lat": 35.18043829999999871915861149318516254425048828125,
        "lon": 35.89699829999999991514414432458579540252685546875
    },
    "last_point": {
        "ts": "2026-09-09T10:26:59+00:00",
        "lat": 35.18048329999999879191818763501942157745361328125,
        "lon": 35.89727669999999903893694863654673099517822265625
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Surveillance Zone
Sep 9, 2026 05:20 UTC 80.0% ▼
  • Zone: Malacca Strait Surveillance Zone
  • Duration: 5h 6m
  • Data Points: 10 AIS positions
  • Period: 2026-09-09T05:20:59+00:00 to 2026-09-09T10:26:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_160",
    "zone_name": "Malacca Strait Surveillance Zone",
    "dwell_minutes": 306,
    "points_in_zone": 10,
    "first_point": {
        "ts": "2026-09-09T05:20:59+00:00",
        "lat": 35.181426700000002938395482487976551055908203125,
        "lon": 35.8958267000000006419213605113327503204345703125
    },
    "last_point": {
        "ts": "2026-09-09T10:26:59+00:00",
        "lat": 35.18048329999999879191818763501942157745361328125,
        "lon": 35.89727669999999903893694863654673099517822265625
    }
}
Methodology: 2026.01.18
Loiter Malacca Strait Surveillance Zone
Sep 9, 2026 05:20 UTC 75.0% ▼
  • Duration: 5h 6m
  • Radius: 109 meters
  • Data Points: 10 AIS positions
  • Centroid: 35.1808, 35.8968
  • Zone: Malacca Strait Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 109.2000000000000028421709430404007434844970703125,
    "duration_minutes": 306,
    "points": 10,
    "centroid": {
        "lat": 35.1808033399999970924909575842320919036865234375,
        "lon": 35.8967546800000008033748599700629711151123046875
    },
    "bbox": {
        "min_lat": 35.1800199999999989586285664699971675872802734375,
        "min_lon": 35.8958267000000006419213605113327503204345703125,
        "max_lat": 35.181426700000002938395482487976551055908203125,
        "max_lon": 35.89727669999999903893694863654673099517822265625
    },
    "zone_id": "discovered_160"
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Surveillance Zone
Sep 9, 2026 04:00 UTC 80.0% ▼
  • Zone: Malacca Strait Surveillance Zone
  • Duration: 6h 26m
  • Data Points: 13 AIS positions
  • Period: 2026-09-09T04:00:27+00:00 to 2026-09-09T10:26:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_160",
    "zone_name": "Malacca Strait Surveillance Zone",
    "dwell_minutes": 386.5,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-09-09T04:00:27+00:00",
        "lat": 35.17994829999999950587152852676808834075927734375,
        "lon": 35.893883299999998826024238951504230499267578125
    },
    "last_point": {
        "ts": "2026-09-09T10:26:59+00:00",
        "lat": 35.18048329999999879191818763501942157745361328125,
        "lon": 35.89727669999999903893694863654673099517822265625
    }
}
Methodology: 2026.01.18
Loiter Malacca Strait Surveillance Zone
Sep 9, 2026 04:00 UTC 75.0% ▼
  • Duration: 6h 26m
  • Radius: 215 meters
  • Data Points: 13 AIS positions
  • Centroid: 35.1806, 35.8961
  • Zone: Malacca Strait Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 215.19999999999998863131622783839702606201171875,
    "duration_minutes": 386.5,
    "points": 13,
    "centroid": {
        "lat": 35.180635899999998628118191845715045928955078125,
        "lon": 35.89609231538461386890048743225634098052978515625
    },
    "bbox": {
        "min_lat": 35.17994829999999950587152852676808834075927734375,
        "min_lon": 35.89386499999999813326212461106479167938232421875,
        "max_lat": 35.181426700000002938395482487976551055908203125,
        "max_lon": 35.89727669999999903893694863654673099517822265625
    },
    "zone_id": "discovered_160"
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Surveillance Zone
Sep 9, 2026 03:12 UTC 80.0% ▼
  • Zone: Malacca Strait Surveillance Zone
  • Duration: 3h 20m
  • Data Points: 17 AIS positions
  • Period: 2026-09-09T03:12:27+00:00 to 2026-09-09T06:32:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_160",
    "zone_name": "Malacca Strait Surveillance Zone",
    "dwell_minutes": 200.5,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-09-09T03:12:27+00:00",
        "lat": 35.179360000000002628439688123762607574462890625,
        "lon": 35.89401000000000152567736222408711910247802734375
    },
    "last_point": {
        "ts": "2026-09-09T06:32:59+00:00",
        "lat": 35.1800199999999989586285664699971675872802734375,
        "lon": 35.89710670000000192203515325672924518585205078125
    }
}
Methodology: 2026.01.18
Loiter Malacca Strait Surveillance Zone
Sep 9, 2026 03:12 UTC 75.0% ▼
  • Duration: 3h 20m
  • Radius: 194 meters
  • Data Points: 17 AIS positions
  • Centroid: 35.1802, 35.8950
  • Zone: Malacca Strait Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 193.900000000000005684341886080801486968994140625,
    "duration_minutes": 200.5,
    "points": 17,
    "centroid": {
        "lat": 35.18020833529411817153231822885572910308837890625,
        "lon": 35.8949903999999975212631397880613803863525390625
    },
    "bbox": {
        "min_lat": 35.179360000000002628439688123762607574462890625,
        "min_lon": 35.893851699999999027568264864385128021240234375,
        "max_lat": 35.181426700000002938395482487976551055908203125,
        "max_lon": 35.89710670000000192203515325672924518585205078125
    },
    "zone_id": "discovered_160"
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Surveillance Zone
Sep 9, 2026 02:15 UTC 80.0% ▼
  • Zone: Malacca Strait Surveillance Zone
  • Duration: 4h 17m
  • Data Points: 18 AIS positions
  • Period: 2026-09-09T02:15:26+00:00 to 2026-09-09T06:32:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_160",
    "zone_name": "Malacca Strait Surveillance Zone",
    "dwell_minutes": 257.6000000000000227373675443232059478759765625,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-09-09T02:15:26+00:00",
        "lat": 35.17902169999999983929228619672358036041259765625,
        "lon": 35.894256699999999682404450140893459320068359375
    },
    "last_point": {
        "ts": "2026-09-09T06:32:59+00:00",
        "lat": 35.1800199999999989586285664699971675872802734375,
        "lon": 35.89710670000000192203515325672924518585205078125
    }
}
Methodology: 2026.01.18
Loiter Malacca Strait Surveillance Zone
Sep 9, 2026 02:15 UTC 75.0% ▼
  • Duration: 4h 17m
  • Radius: 197 meters
  • Data Points: 18 AIS positions
  • Centroid: 35.1801, 35.8949
  • Zone: Malacca Strait Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 197,
    "duration_minutes": 257.6000000000000227373675443232059478759765625,
    "points": 18,
    "centroid": {
        "lat": 35.18014241111111317650284036062657833099365234375,
        "lon": 35.89494963888888179326386307366192340850830078125
    },
    "bbox": {
        "min_lat": 35.17902169999999983929228619672358036041259765625,
        "min_lon": 35.893851699999999027568264864385128021240234375,
        "max_lat": 35.181426700000002938395482487976551055908203125,
        "max_lon": 35.89710670000000192203515325672924518585205078125
    },
    "zone_id": "discovered_160"
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Surveillance Zone
Sep 9, 2026 01:01 UTC 80.0% ▼
  • Zone: Malacca Strait Surveillance Zone
  • Duration: 5h 31m
  • Data Points: 25 AIS positions
  • Period: 2026-09-09T01:01:58+00:00 to 2026-09-09T06:32:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_160",
    "zone_name": "Malacca Strait Surveillance Zone",
    "dwell_minutes": 331,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-09-09T01:01:58+00:00",
        "lat": 35.17920670000000171739884535782039165496826171875,
        "lon": 35.894080000000002428350853733718395233154296875
    },
    "last_point": {
        "ts": "2026-09-09T06:32:59+00:00",
        "lat": 35.1800199999999989586285664699971675872802734375,
        "lon": 35.89710670000000192203515325672924518585205078125
    }
}
Methodology: 2026.01.18
Loiter Malacca Strait Surveillance Zone
Sep 9, 2026 01:01 UTC 75.0% ▼
  • Duration: 5h 31m
  • Radius: 587 meters
  • Data Points: 25 AIS positions
  • Centroid: 35.1799, 35.8944
  • Zone: Malacca Strait Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 587.200000000000045474735088646411895751953125,
    "duration_minutes": 331,
    "points": 25,
    "centroid": {
        "lat": 35.179884471999997685998096130788326263427734375,
        "lon": 35.8944484679999931131533230654895305633544921875
    },
    "bbox": {
        "min_lat": 35.1787666999999970585122355259954929351806640625,
        "min_lon": 35.88800330000000116115188575349748134613037109375,
        "max_lat": 35.181426700000002938395482487976551055908203125,
        "max_lon": 35.89710670000000192203515325672924518585205078125
    },
    "zone_id": "discovered_160"
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Surveillance Zone
Sep 9, 2026 00:00 UTC 80.0% ▼
  • Zone: Malacca Strait Surveillance Zone
  • Duration: 6h 32m
  • Data Points: 35 AIS positions
  • Period: 2026-09-09T00:00:35+00:00 to 2026-09-09T06:32:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_160",
    "zone_name": "Malacca Strait Surveillance Zone",
    "dwell_minutes": 392.3999999999999772626324556767940521240234375,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-09-09T00:00:35+00:00",
        "lat": 35.17918999999999840611053514294326305389404296875,
        "lon": 35.89408329999999835990820429287850856781005859375
    },
    "last_point": {
        "ts": "2026-09-09T06:32:59+00:00",
        "lat": 35.1800199999999989586285664699971675872802734375,
        "lon": 35.89710670000000192203515325672924518585205078125
    }
}
Methodology: 2026.01.18
Loiter Malacca Strait Surveillance Zone
Sep 9, 2026 00:00 UTC 75.0% ▼
  • Duration: 6h 32m
  • Radius: 577 meters
  • Data Points: 35 AIS positions
  • Centroid: 35.1797, 35.8943
  • Zone: Malacca Strait Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 577.299999999999954525264911353588104248046875,
    "duration_minutes": 392.3999999999999772626324556767940521240234375,
    "points": 35,
    "centroid": {
        "lat": 35.17968872000000146726961247622966766357421875,
        "lon": 35.89434023714284904826854472048580646514892578125
    },
    "bbox": {
        "min_lat": 35.1787666999999970585122355259954929351806640625,
        "min_lon": 35.88800330000000116115188575349748134613037109375,
        "max_lat": 35.181426700000002938395482487976551055908203125,
        "max_lon": 35.89710670000000192203515325672924518585205078125
    },
    "zone_id": "discovered_160"
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Surveillance Zone
Sep 8, 2026 23:03 UTC 80.0% ▼
  • Zone: Malacca Strait Surveillance Zone
  • Duration: 6h 32m
  • Data Points: 43 AIS positions
  • Period: 2026-09-08T23:30:15+00:00 to 2026-09-09T06:02:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_160",
    "zone_name": "Malacca Strait Surveillance Zone",
    "dwell_minutes": 392.69999999999998863131622783839702606201171875,
    "points_in_zone": 43,
    "first_point": {
        "ts": "2026-09-08T23:30:15+00:00",
        "lat": 35.1788983000000001766238710843026638031005859375,
        "lon": 35.8942382999999978210325934924185276031494140625
    },
    "last_point": {
        "ts": "2026-09-09T06:02:59+00:00",
        "lat": 35.18043829999999871915861149318516254425048828125,
        "lon": 35.89699829999999991514414432458579540252685546875
    }
}
Methodology: 2026.01.18
Loiter Malacca Strait Surveillance Zone
Sep 8, 2026 23:03 UTC 75.0% ▼
  • Duration: 6h 32m
  • Radius: 569 meters
  • Data Points: 43 AIS positions
  • Centroid: 35.1796, 35.8942
  • Zone: Malacca Strait Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 568.6000000000000227373675443232059478759765625,
    "duration_minutes": 392.69999999999998863131622783839702606201171875,
    "points": 43,
    "centroid": {
        "lat": 35.17955756279069845504636759869754314422607421875,
        "lon": 35.89424096976744493758815224282443523406982421875
    },
    "bbox": {
        "min_lat": 35.1787666999999970585122355259954929351806640625,
        "min_lon": 35.88800330000000116115188575349748134613037109375,
        "max_lat": 35.181426700000002938395482487976551055908203125,
        "max_lon": 35.89699829999999991514414432458579540252685546875
    },
    "zone_id": "discovered_160"
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Surveillance Zone
Sep 8, 2026 22:08 UTC 80.0% ▼
  • Zone: Malacca Strait Surveillance Zone
  • Duration: 6h 31m
  • Data Points: 49 AIS positions
  • Period: 2026-09-08T22:55:45+00:00 to 2026-09-09T05:26:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_160",
    "zone_name": "Malacca Strait Surveillance Zone",
    "dwell_minutes": 391.19999999999998863131622783839702606201171875,
    "points_in_zone": 49,
    "first_point": {
        "ts": "2026-09-08T22:55:45+00:00",
        "lat": 35.17906500000000136196831590496003627777099609375,
        "lon": 35.8943282999999979665517457760870456695556640625
    },
    "last_point": {
        "ts": "2026-09-09T05:26:59+00:00",
        "lat": 35.18134669999999886158548179082572460174560546875,
        "lon": 35.89612170000000190839273273013532161712646484375
    }
}
Methodology: 2026.01.18
Loiter Malacca Strait Surveillance Zone
Sep 8, 2026 22:08 UTC 75.0% ▼
  • Duration: 6h 31m
  • Radius: 557 meters
  • Data Points: 49 AIS positions
  • Centroid: 35.1794, 35.8941
  • Zone: Malacca Strait Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 557.299999999999954525264911353588104248046875,
    "duration_minutes": 391.19999999999998863131622783839702606201171875,
    "points": 49,
    "centroid": {
        "lat": 35.17935098775510738278171629644930362701416015625,
        "lon": 35.89410078367347267658260534517467021942138671875
    },
    "bbox": {
        "min_lat": 35.17860499999999746023604529909789562225341796875,
        "min_lon": 35.88800330000000116115188575349748134613037109375,
        "max_lat": 35.181426700000002938395482487976551055908203125,
        "max_lon": 35.89612170000000190839273273013532161712646484375
    },
    "zone_id": "discovered_160"
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Surveillance Zone
Sep 8, 2026 21:05 UTC 80.0% ▼
  • Zone: Malacca Strait Surveillance Zone
  • Duration: 6h 27m
  • Data Points: 58 AIS positions
  • Period: 2026-09-08T21:44:57+00:00 to 2026-09-09T04:11:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_160",
    "zone_name": "Malacca Strait Surveillance Zone",
    "dwell_minutes": 387,
    "points_in_zone": 58,
    "first_point": {
        "ts": "2026-09-08T21:44:57+00:00",
        "lat": 35.178861699999998791099642403423786163330078125,
        "lon": 35.894374999999996589394868351519107818603515625
    },
    "last_point": {
        "ts": "2026-09-09T04:11:59+00:00",
        "lat": 35.18015170000000324534994433633983135223388671875,
        "lon": 35.89390499999999661895344615913927555084228515625
    }
}
Methodology: 2026.01.18
Loiter Malacca Strait Surveillance Zone
Sep 8, 2026 21:05 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 556 meters
  • Data Points: 58 AIS positions
  • Centroid: 35.1792, 35.8941
  • Zone: Malacca Strait Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 555.700000000000045474735088646411895751953125,
    "duration_minutes": 387,
    "points": 58,
    "centroid": {
        "lat": 35.17922126551724915088925627060234546661376953125,
        "lon": 35.89406899482759172315127216279506683349609375
    },
    "bbox": {
        "min_lat": 35.17860499999999746023604529909789562225341796875,
        "min_lon": 35.88800330000000116115188575349748134613037109375,
        "max_lat": 35.18063829999999825304257683455944061279296875,
        "max_lon": 35.895696700000002010710886679589748382568359375
    },
    "zone_id": "discovered_160"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 24, 2026 05:00 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 1h 56m
  • Data Points: 9 AIS positions
  • Period: 2026-08-24T05:00:07+00:00 to 2026-08-24T06:56:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 116.7000000000000028421709430404007434844970703125,
    "points_in_zone": 9,
    "first_point": {
        "ts": "2026-08-24T05:00:07+00:00",
        "lat": 34.66354170000000323170752380974590778350830078125,
        "lon": 33.4676649999999966667019180022180080413818359375
    },
    "last_point": {
        "ts": "2026-08-24T06:56:48+00:00",
        "lat": 34.77138169999999917081368039362132549285888671875,
        "lon": 33.94369999999999976125764078460633754730224609375
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 24, 2026 04:03 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 2h 53m
  • Data Points: 24 AIS positions
  • Period: 2026-08-24T04:03:50+00:00 to 2026-08-24T06:56:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 173,
    "points_in_zone": 24,
    "first_point": {
        "ts": "2026-08-24T04:03:50+00:00",
        "lat": 34.70938000000000300815372611396014690399169921875,
        "lon": 33.32370329999999825076884008012712001800537109375
    },
    "last_point": {
        "ts": "2026-08-24T06:56:48+00:00",
        "lat": 34.77138169999999917081368039362132549285888671875,
        "lon": 33.94369999999999976125764078460633754730224609375
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 23, 2026 17:19 UTC 85/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 1030076 (CAMARO) LIBERIA
  • Minimum Distance: 292 meters
  • Average Distance: 295 meters
  • Duration: 4h 6m
  • Period: 2026-08-23T17:19:25+00:00 to 2026-08-23T21:25:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (AVANTI and CAMARO) maintained close proximity (min 292m, avg 295m) for 246 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 292m, avg 295m
Duration25/25Duration 246 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T21:45:04.078796+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636025227,
        "imo": 1030076,
        "name": "CAMARO",
        "flag": "LIBERIA"
    },
    "min_distance_m": 292.30000000000001136868377216160297393798828125,
    "avg_distance_m": 294.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 246,
    "overlap_duration_s": 14760,
    "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": "2026-08-23T17:19:25+00:00",
        "end": "2026-08-23T21:25:25+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 292m, avg 295m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 246 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and CAMARO) maintained close proximity (min 292m, avg 295m) for 246 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 Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70875749999999726469468441791832447052001953125,
            "lon": 33.3218470999999993864548741839826107025146484375
        },
        "time_window": {
            "start_ts": "2026-08-23T17:19:25+00:00",
            "end_ts": "2026-08-23T21:25:25+00:00"
        },
        "searched_at": "2026-08-23T21:45:04.078796+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 17:19 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 4h 6m
  • Data Points: 2 AIS positions
  • Period: 2026-08-23T17:19:25+00:00 to 2026-08-23T21:25:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 246,
    "points_in_zone": 2,
    "first_point": {
        "ts": "2026-08-23T17:19:25+00:00",
        "lat": 34.70960670000000192203515325672924518585205078125,
        "lon": 33.32308499999999895635482971556484699249267578125
    },
    "last_point": {
        "ts": "2026-08-23T21:25:25+00:00",
        "lat": 34.70962670000000116488081403076648712158203125,
        "lon": 33.3230616999999966765244607813656330108642578125
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 23, 2026 15:07 UTC 95/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9328340 (OCEAN MARINER) LIBERIA
  • Minimum Distance: 76 meters
  • Average Distance: 76 meters
  • Duration: 2h 12m
  • Period: 2026-08-23T15:07:25+00:00 to 2026-08-23T17:19:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 76m, avg 76m) for 132 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 76m, avg 76m
Duration25/25Duration 132 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T21:45:01.500309+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 75.5,
    "avg_distance_m": 75.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 0.59999999999999997779553950749686919152736663818359375,
    "duration_minutes": 132,
    "overlap_duration_s": 7920,
    "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": "2026-08-23T15:07:25+00:00",
        "end": "2026-08-23T17:19:25+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 76m, avg 76m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 132 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 76m, avg 76m) for 132 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 Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70987290000000058398654800839722156524658203125,
            "lon": 33.32280130000000184509190148673951625823974609375
        },
        "time_window": {
            "start_ts": "2026-08-23T15:07:25+00:00",
            "end_ts": "2026-08-23T17:19:25+00:00"
        },
        "searched_at": "2026-08-23T21:45:01.500309+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 15:01 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 4 AIS positions
  • Period: 2026-08-23T15:01:25+00:00 to 2026-08-23T21:25:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 384,
    "points_in_zone": 4,
    "first_point": {
        "ts": "2026-08-23T15:01:25+00:00",
        "lat": 34.70964169999999882065822021104395389556884765625,
        "lon": 33.323070000000001300577423535287380218505859375
    },
    "last_point": {
        "ts": "2026-08-23T21:25:25+00:00",
        "lat": 34.70962670000000116488081403076648712158203125,
        "lon": 33.3230616999999966765244607813656330108642578125
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 23, 2026 14:04 UTC 85/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9328340 (OCEAN MARINER) LIBERIA
  • Minimum Distance: 66 meters
  • Average Distance: 73 meters
  • Duration: 1h 3m
  • Period: 2026-08-23T14:04:25+00:00 to 2026-08-23T15:07:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 66m, avg 73m) for 63 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 66m, avg 73m
Duration15/25Duration 63 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T19:30:13.549248+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 66.2999999999999971578290569595992565155029296875,
    "avg_distance_m": 73.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 4.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 63,
    "overlap_duration_s": 3780,
    "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": "2026-08-23T14:04:25+00:00",
        "end": "2026-08-23T15:07:25+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 66m, avg 73m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 63 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 66m, avg 73m) for 63 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.709891499999997677150531671941280364990234375,
            "lon": 33.322808100000003150853444822132587432861328125
        },
        "time_window": {
            "start_ts": "2026-08-23T14:04:25+00:00",
            "end_ts": "2026-08-23T15:07:25+00:00"
        },
        "searched_at": "2026-08-23T19:30:13.549248+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 14:04 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 3h 15m
  • Data Points: 5 AIS positions
  • Period: 2026-08-23T14:04:25+00:00 to 2026-08-23T17:19:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 195,
    "points_in_zone": 5,
    "first_point": {
        "ts": "2026-08-23T14:04:25+00:00",
        "lat": 34.70964670000000040772647480480372905731201171875,
        "lon": 33.32304669999999902074705460108816623687744140625
    },
    "last_point": {
        "ts": "2026-08-23T17:19:25+00:00",
        "lat": 34.70960670000000192203515325672924518585205078125,
        "lon": 33.32308499999999895635482971556484699249267578125
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 23, 2026 13:25 UTC 90/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9328340 (OCEAN MARINER) LIBERIA
  • Minimum Distance: 66 meters
  • Average Distance: 73 meters
  • Duration: 1h 42m
  • Period: 2026-08-23T13:25:25+00:00 to 2026-08-23T15:07:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 66m, avg 72m) for 102 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 66m, avg 72m
Duration20/25Duration 102 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 66.2999999999999971578290569595992565155029296875,
    "avg_distance_m": 72.5,
    "distance_consistency_m": 4.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 102,
    "overlap_duration_s": 6120,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-23T13:25:25+00:00",
        "end": "2026-08-23T15:07:25+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 66m, avg 72m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 102 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 Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 66m, avg 72m) for 102 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 13:25 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 3h 54m
  • Data Points: 6 AIS positions
  • Period: 2026-08-23T13:25:25+00:00 to 2026-08-23T17:19:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 234,
    "points_in_zone": 6,
    "first_point": {
        "ts": "2026-08-23T13:25:25+00:00",
        "lat": 34.7097033000000010360963642597198486328125,
        "lon": 33.32308669999999750643837614916265010833740234375
    },
    "last_point": {
        "ts": "2026-08-23T17:19:25+00:00",
        "lat": 34.70960670000000192203515325672924518585205078125,
        "lon": 33.32308499999999895635482971556484699249267578125
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 23, 2026 12:52 UTC 60/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9374337 (KASHI) INDIA
  • Minimum Distance: 303 meters
  • Average Distance: 306 meters
  • Duration: 33 minutes
  • Period: 2026-08-23T12:52:25+00:00 to 2026-08-23T13:25:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (AVANTI and KASHI) maintained close proximity (min 303m, avg 306m) for 33 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 303m, avg 306m
Duration5/25Duration 33 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T14:15:01.908498+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 419001875,
        "imo": 9374337,
        "name": "KASHI",
        "flag": "INDIA"
    },
    "min_distance_m": 303,
    "avg_distance_m": 305.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 4,
    "duration_minutes": 33,
    "overlap_duration_s": 1980,
    "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": "2026-08-23T12:52:25+00:00",
        "end": "2026-08-23T13:25:25+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 303m, avg 306m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 33 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AVANTI and KASHI) maintained close proximity (min 303m, avg 306m) for 33 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70871460000000041645762394182384014129638671875,
            "lon": 33.32186920000000185382305062375962734222412109375
        },
        "time_window": {
            "start_ts": "2026-08-23T12:52:25+00:00",
            "end_ts": "2026-08-23T13:25:25+00:00"
        },
        "searched_at": "2026-08-23T14:15:01.908498+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 23, 2026 12:31 UTC 80/100 ▼
Vessel A: IMO 9328340 (OCEAN MARINER) LIBERIA
Vessel B: IMO 9403334 (AVANTI) MARSHALL ISLANDS
  • Minimum Distance: 67 meters
  • Average Distance: 71 meters
  • Duration: 58 minutes
  • Period: 2026-08-23T12:31:59+00:00 to 2026-08-23T13:30:11+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (OCEAN MARINER and AVANTI) maintained close proximity (min 67m, avg 71m) for 58 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 67m, avg 71m
Duration10/25Duration 58 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T14:15:04.872483+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 67.400000000000005684341886080801486968994140625,
    "avg_distance_m": 71,
    "distance_consistency_m": 4.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 58.2000000000000028421709430404007434844970703125,
    "overlap_duration_s": 3492,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-23T12:31:59+00:00",
        "end": "2026-08-23T13:30:11+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 67m, avg 71m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 58 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 Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (OCEAN MARINER and AVANTI) maintained close proximity (min 67m, avg 71m) for 58 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 Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70991529999999869460225454531610012054443359375,
            "lon": 33.3228292000000010375515557825565338134765625
        },
        "time_window": {
            "start_ts": "2026-08-23T12:31:59+00:00",
            "end_ts": "2026-08-23T13:30:11+00:00"
        },
        "searched_at": "2026-08-23T14:15:04.872483+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 23, 2026 12:31 UTC 65/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 319 meters
  • Average Distance: 322 meters
  • Duration: 54 minutes
  • Period: 2026-08-23T12:31:25+00:00 to 2026-08-23T13:25:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 319m, avg 322m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 319m, avg 322m
Duration10/25Duration 54 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T18:15:06.509857+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 319.19999999999998863131622783839702606201171875,
    "avg_distance_m": 322,
    "distance_consistency_m": 2.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 54,
    "overlap_duration_s": 3240,
    "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": "2026-08-23T12:31:25+00:00",
        "end": "2026-08-23T13:25:25+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 319m, avg 322m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 54 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 319m, avg 322m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.708891399999998839120962657034397125244140625,
            "lon": 33.3215655999999995628968463279306888580322265625
        },
        "time_window": {
            "start_ts": "2026-08-23T12:31:25+00:00",
            "end_ts": "2026-08-23T13:25:25+00:00"
        },
        "searched_at": "2026-08-23T18:15:06.509857+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 12:31 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 4h 48m
  • Data Points: 8 AIS positions
  • Period: 2026-08-23T12:31:25+00:00 to 2026-08-23T17:19:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 288,
    "points_in_zone": 8,
    "first_point": {
        "ts": "2026-08-23T12:31:25+00:00",
        "lat": 34.70960170000000033496689866296947002410888671875,
        "lon": 33.32305170000000060781530919484794139862060546875
    },
    "last_point": {
        "ts": "2026-08-23T17:19:25+00:00",
        "lat": 34.70960670000000192203515325672924518585205078125,
        "lon": 33.32308499999999895635482971556484699249267578125
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 23, 2026 11:01 UTC 90/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9328340 (OCEAN MARINER) LIBERIA
  • Minimum Distance: 64 meters
  • Average Distance: 74 meters
  • Duration: 1h 30m
  • Period: 2026-08-23T11:01:25+00:00 to 2026-08-23T12:31:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 64m, avg 74m) for 90 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 74m
Duration20/25Duration 90 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±7m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.099999999999994315658113919198513031005859375,
    "avg_distance_m": 74.2999999999999971578290569595992565155029296875,
    "distance_consistency_m": 6.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 90,
    "overlap_duration_s": 5400,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-23T11:01:25+00:00",
        "end": "2026-08-23T12:31:25+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 74m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 90 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 64m, avg 74m) for 90 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 23, 2026 11:01 UTC 80/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 319 meters
  • Average Distance: 321 meters
  • Duration: 2h 24m
  • Period: 2026-08-23T11:01:25+00:00 to 2026-08-23T13:25:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 319m, avg 321m) for 144 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 319m, avg 321m
Duration25/25Duration 144 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T17:15:07.967793+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 319.19999999999998863131622783839702606201171875,
    "avg_distance_m": 321.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 144,
    "overlap_duration_s": 8640,
    "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": "2026-08-23T11:01:25+00:00",
        "end": "2026-08-23T13:25:25+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 319m, avg 321m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 144 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 319m, avg 321m) for 144 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70887429999999795882104081101715564727783203125,
            "lon": 33.32156239999999769452188047580420970916748046875
        },
        "time_window": {
            "start_ts": "2026-08-23T11:01:25+00:00",
            "end_ts": "2026-08-23T13:25:25+00:00"
        },
        "searched_at": "2026-08-23T17:15:07.967793+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 11:01 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 18m
  • Data Points: 13 AIS positions
  • Period: 2026-08-23T11:01:25+00:00 to 2026-08-23T17:19:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 378,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-08-23T11:01:25+00:00",
        "lat": 34.70961170000000350910340785048902034759521484375,
        "lon": 33.32306330000000116342562250792980194091796875
    },
    "last_point": {
        "ts": "2026-08-23T17:19:25+00:00",
        "lat": 34.70960670000000192203515325672924518585205078125,
        "lon": 33.32308499999999895635482971556484699249267578125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 23, 2026 11:01 UTC 75.0% ▼
  • Duration: 6h 18m
  • Radius: 9 meters
  • Data Points: 13 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 9.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 378,
    "points": 13,
    "centroid": {
        "lat": 34.7096239846153906682957313023507595062255859375,
        "lon": 33.3230633461538445772021077573299407958984375
    },
    "bbox": {
        "min_lat": 34.70959500000000019781509763561189174652099609375,
        "min_lon": 33.32304669999999902074705460108816623687744140625,
        "max_lat": 34.7097033000000010360963642597198486328125,
        "max_lon": 33.32308669999999750643837614916265010833740234375
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 23, 2026 10:13 UTC 80/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 319 meters
  • Average Distance: 322 meters
  • Duration: 3h 12m
  • Period: 2026-08-23T10:13:26+00:00 to 2026-08-23T13:25:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 319m, avg 322m) for 192 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 319m, avg 322m
Duration25/25Duration 192 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 319.19999999999998863131622783839702606201171875,
    "avg_distance_m": 322,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 192,
    "overlap_duration_s": 11519,
    "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": "2026-08-23T10:13:26+00:00",
        "end": "2026-08-23T13:25:25+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 319m, avg 322m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 192 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 319m, avg 322m) for 192 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 10:13 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 4h 54m
  • Data Points: 16 AIS positions
  • Period: 2026-08-23T10:13:26+00:00 to 2026-08-23T15:07:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 294,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-08-23T10:13:26+00:00",
        "lat": 34.7096317000000027519490686245262622833251953125,
        "lon": 33.323053299999997989289113320410251617431640625
    },
    "last_point": {
        "ts": "2026-08-23T15:07:25+00:00",
        "lat": 34.7096183000000024776454665698111057281494140625,
        "lon": 33.323053299999997989289113320410251617431640625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 23, 2026 10:13 UTC 75.0% ▼
  • Duration: 4h 54m
  • Radius: 9 meters
  • Data Points: 16 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 294,
    "points": 16,
    "centroid": {
        "lat": 34.70962542500000580503183300606906414031982421875,
        "lon": 33.3230632374999942157955956645309925079345703125
    },
    "bbox": {
        "min_lat": 34.70959500000000019781509763561189174652099609375,
        "min_lon": 33.32304669999999902074705460108816623687744140625,
        "max_lat": 34.7097033000000010360963642597198486328125,
        "max_lon": 33.32308669999999750643837614916265010833740234375
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 23, 2026 09:40 UTC 75/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9328340 (OCEAN MARINER) LIBERIA
  • Minimum Distance: 71 meters
  • Average Distance: 73 meters
  • Duration: 42 minutes
  • Period: 2026-08-23T09:40:26+00:00 to 2026-08-23T10:22:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 71m, avg 73m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 71m, avg 73m
Duration5/25Duration 42 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 71.2999999999999971578290569595992565155029296875,
    "avg_distance_m": 73,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 42,
    "overlap_duration_s": 2520,
    "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": "2026-08-23T09:40:26+00:00",
        "end": "2026-08-23T10:22:26+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 71m, avg 73m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 42 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 71m, avg 73m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 09:16 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 5h 51m
  • Data Points: 18 AIS positions
  • Period: 2026-08-23T09:16:27+00:00 to 2026-08-23T15:07:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 351,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-08-23T09:16:27+00:00",
        "lat": 34.7096183000000024776454665698111057281494140625,
        "lon": 33.32306330000000116342562250792980194091796875
    },
    "last_point": {
        "ts": "2026-08-23T15:07:25+00:00",
        "lat": 34.7096183000000024776454665698111057281494140625,
        "lon": 33.323053299999997989289113320410251617431640625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 23, 2026 09:16 UTC 75.0% ▼
  • Duration: 5h 51m
  • Radius: 9 meters
  • Data Points: 18 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8.800000000000000710542735760100185871124267578125,
    "duration_minutes": 351,
    "points": 18,
    "centroid": {
        "lat": 34.70962648888888679721276275813579559326171875,
        "lon": 33.323063338888886164568248204886913299560546875
    },
    "bbox": {
        "min_lat": 34.70959500000000019781509763561189174652099609375,
        "min_lon": 33.32304669999999902074705460108816623687744140625,
        "max_lat": 34.7097033000000010360963642597198486328125,
        "max_lon": 33.32308669999999750643837614916265010833740234375
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 08:07 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 20 AIS positions
  • Period: 2026-08-23T08:31:26+00:00 to 2026-08-23T15:07:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 396,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-08-23T08:31:26+00:00",
        "lat": 34.70963330000000013342287275008857250213623046875,
        "lon": 33.3230716999999998506609699688851833343505859375
    },
    "last_point": {
        "ts": "2026-08-23T15:07:25+00:00",
        "lat": 34.7096183000000024776454665698111057281494140625,
        "lon": 33.323053299999997989289113320410251617431640625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 23, 2026 08:07 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 9 meters
  • Data Points: 20 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8.699999999999999289457264239899814128875732421875,
    "duration_minutes": 396,
    "points": 20,
    "centroid": {
        "lat": 34.70962684000000564310539630241692066192626953125,
        "lon": 33.32306459000000842252120492048561573028564453125
    },
    "bbox": {
        "min_lat": 34.70959500000000019781509763561189174652099609375,
        "min_lon": 33.32304669999999902074705460108816623687744140625,
        "max_lat": 34.7097033000000010360963642597198486328125,
        "max_lon": 33.32308669999999750643837614916265010833740234375
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 23, 2026 08:05 UTC 60/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 322 meters
  • Average Distance: 324 meters
  • Duration: 39 minutes
  • Period: 2026-08-23T08:37:27+00:00 to 2026-08-23T09:16:27+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 322m, avg 324m) for 39 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 322m, avg 324m
Duration5/25Duration 39 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 321.5,
    "avg_distance_m": 324.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 4.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 39,
    "overlap_duration_s": 2340,
    "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": "2026-08-23T08:37:27+00:00",
        "end": "2026-08-23T09:16:27+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 322m, avg 324m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 39 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 Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 322m, avg 324m) for 39 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 23, 2026 08:05 UTC 75/100 ▼
Vessel A: IMO 9328340 (OCEAN MARINER) LIBERIA
Vessel B: IMO 9403334 (AVANTI) MARSHALL ISLANDS
  • Minimum Distance: 67 meters
  • Average Distance: 76 meters
  • Duration: 42 minutes
  • Period: 2026-08-23T08:05:02+00:00 to 2026-08-23T08:47:04+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (OCEAN MARINER and AVANTI) maintained close proximity (min 67m, avg 76m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 67m, avg 76m
Duration5/25Duration 42 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±7m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T09:30:16.256486+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 67.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 76.2999999999999971578290569595992565155029296875,
    "distance_consistency_m": 6.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 42,
    "overlap_duration_s": 2522,
    "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": "2026-08-23T08:05:02+00:00",
        "end": "2026-08-23T08:47:04+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 67m, avg 76m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 42 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (OCEAN MARINER and AVANTI) maintained close proximity (min 67m, avg 76m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70989709999999917044988251291215419769287109375,
            "lon": 33.322826300000002675005816854536533355712890625
        },
        "time_window": {
            "start_ts": "2026-08-23T08:05:02+00:00",
            "end_ts": "2026-08-23T08:47:04+00:00"
        },
        "searched_at": "2026-08-23T09:30:16.256486+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 23, 2026 06:25 UTC 75/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 323 meters
  • Average Distance: 326 meters
  • Duration: 1h 42m
  • Period: 2026-08-23T06:25:26+00:00 to 2026-08-23T08:07:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 323m, avg 326m) for 102 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 323m, avg 326m
Duration20/25Duration 102 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T13:00:01.318498+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 323.19999999999998863131622783839702606201171875,
    "avg_distance_m": 325.5,
    "distance_consistency_m": 3.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 102,
    "overlap_duration_s": 6120,
    "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": "2026-08-23T06:25:26+00:00",
        "end": "2026-08-23T08:07:26+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 323m, avg 326m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 102 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 323m, avg 326m) for 102 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 Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70885919999999913443389232270419597625732421875,
            "lon": 33.3215574999999972760633681900799274444580078125
        },
        "time_window": {
            "start_ts": "2026-08-23T06:25:26+00:00",
            "end_ts": "2026-08-23T08:07:26+00:00"
        },
        "searched_at": "2026-08-23T13:00:01.318498+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 06:16 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 27m
  • Data Points: 17 AIS positions
  • Period: 2026-08-23T06:25:26+00:00 to 2026-08-23T12:52:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 387,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-08-23T06:25:26+00:00",
        "lat": 34.70960500000000337195160682313144207000732421875,
        "lon": 33.3230549999999965393726597540080547332763671875
    },
    "last_point": {
        "ts": "2026-08-23T12:52:25+00:00",
        "lat": 34.70963830000000172049112734384834766387939453125,
        "lon": 33.32305670000000219488356378860771656036376953125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 23, 2026 06:16 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 4 meters
  • Data Points: 17 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.5,
    "duration_minutes": 387,
    "points": 17,
    "centroid": {
        "lat": 34.70962010588235813202118151821196079254150390625,
        "lon": 33.32306627647059116270611411891877651214599609375
    },
    "bbox": {
        "min_lat": 34.70959500000000019781509763561189174652099609375,
        "min_lon": 33.32305170000000060781530919484794139862060546875,
        "max_lat": 34.70965170000000199479472939856350421905517578125,
        "max_lon": 33.323098299999998062048689462244510650634765625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 05:16 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 22 AIS positions
  • Period: 2026-08-23T05:16:26+00:00 to 2026-08-23T11:40:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 384,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-08-23T05:16:26+00:00",
        "lat": 34.709620000000001027729013003408908843994140625,
        "lon": 33.32303830000000033351170714013278484344482421875
    },
    "last_point": {
        "ts": "2026-08-23T11:40:25+00:00",
        "lat": 34.70960000000000178488335222937166690826416015625,
        "lon": 33.3230716999999998506609699688851833343505859375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 23, 2026 05:16 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 4 meters
  • Data Points: 22 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 384,
    "points": 22,
    "centroid": {
        "lat": 34.709618490909093679874786175787448883056640625,
        "lon": 33.32306015454545189413693151436746120452880859375
    },
    "bbox": {
        "min_lat": 34.70959500000000019781509763561189174652099609375,
        "min_lon": 33.323031700000001364969648420810699462890625,
        "max_lat": 34.70965170000000199479472939856350421905517578125,
        "max_lon": 33.323098299999998062048689462244510650634765625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 23, 2026 05:05 UTC 80/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 317 meters
  • Average Distance: 321 meters
  • Duration: 2h 42m
  • Period: 2026-08-23T05:25:26+00:00 to 2026-08-23T08:07:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 317m, avg 321m) for 162 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 321m
Duration25/25Duration 162 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 317,
    "avg_distance_m": 320.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 3.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 162,
    "overlap_duration_s": 9720,
    "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": "2026-08-23T05:25:26+00:00",
        "end": "2026-08-23T08:07:26+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 321m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 162 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 317m, avg 321m) for 162 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 23, 2026 05:00 UTC 95/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9328340 (OCEAN MARINER) LIBERIA
  • Minimum Distance: 60 meters
  • Average Distance: 72 meters
  • Duration: 2h 48m
  • Period: 2026-08-23T05:49:27+00:00 to 2026-08-23T08:37:27+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 60m, avg 72m) for 168 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 60m, avg 72m
Duration25/25Duration 168 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 60.2999999999999971578290569595992565155029296875,
    "avg_distance_m": 71.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 8.800000000000000710542735760100185871124267578125,
    "duration_minutes": 168,
    "overlap_duration_s": 10080,
    "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": "2026-08-23T05:49:27+00:00",
        "end": "2026-08-23T08:37:27+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 60m, avg 72m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 168 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 Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 60m, avg 72m) for 168 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 23, 2026 04:58 UTC 95/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9328340 (OCEAN MARINER) LIBERIA
  • Minimum Distance: 60 meters
  • Average Distance: 71 meters
  • Duration: 3h 39m
  • Period: 2026-08-23T04:58:28+00:00 to 2026-08-23T08:37:27+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 60m, avg 71m) for 219 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 60m, avg 71m
Duration25/25Duration 219 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±7m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 60.2999999999999971578290569595992565155029296875,
    "avg_distance_m": 71.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 7,
    "duration_minutes": 219,
    "overlap_duration_s": 13139,
    "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": "2026-08-23T04:58:28+00:00",
        "end": "2026-08-23T08:37:27+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 60m, avg 71m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 219 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 60m, avg 71m) for 219 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 23, 2026 04:26 UTC 80/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 317 meters
  • Average Distance: 321 meters
  • Duration: 3h 30m
  • Period: 2026-08-23T04:37:27+00:00 to 2026-08-23T08:07:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 317m, avg 321m) for 210 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 321m
Duration25/25Duration 210 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 317,
    "avg_distance_m": 320.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 3.5,
    "duration_minutes": 210,
    "overlap_duration_s": 12599,
    "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": "2026-08-23T04:37:27+00:00",
        "end": "2026-08-23T08:07:26+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 321m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 210 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 317m, avg 321m) for 210 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 04:13 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 20m
  • Data Points: 22 AIS positions
  • Period: 2026-08-23T04:58:28+00:00 to 2026-08-23T11:19:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 380.8999999999999772626324556767940521240234375,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-08-23T04:58:28+00:00",
        "lat": 34.70962670000000116488081403076648712158203125,
        "lon": 33.323070000000001300577423535287380218505859375
    },
    "last_point": {
        "ts": "2026-08-23T11:19:24+00:00",
        "lat": 34.70962670000000116488081403076648712158203125,
        "lon": 33.32305170000000060781530919484794139862060546875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 23, 2026 04:13 UTC 75.0% ▼
  • Duration: 6h 20m
  • Radius: 4 meters
  • Data Points: 22 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 380.8999999999999772626324556767940521240234375,
    "points": 22,
    "centroid": {
        "lat": 34.70961970454545308939486858434975147247314453125,
        "lon": 33.3230600772727285630026017315685749053955078125
    },
    "bbox": {
        "min_lat": 34.70959500000000019781509763561189174652099609375,
        "min_lon": 33.323031700000001364969648420810699462890625,
        "max_lat": 34.70965170000000199479472939856350421905517578125,
        "max_lon": 33.323098299999998062048689462244510650634765625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 03:13 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 27m
  • Data Points: 20 AIS positions
  • Period: 2026-08-23T03:46:25+00:00 to 2026-08-23T10:13:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 387,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-08-23T03:46:25+00:00",
        "lat": 34.7096216999999995778125594370067119598388671875,
        "lon": 33.32306330000000116342562250792980194091796875
    },
    "last_point": {
        "ts": "2026-08-23T10:13:26+00:00",
        "lat": 34.7096317000000027519490686245262622833251953125,
        "lon": 33.323053299999997989289113320410251617431640625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 23, 2026 03:13 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 4 meters
  • Data Points: 20 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 387,
    "points": 20,
    "centroid": {
        "lat": 34.7096226750000056426870287396013736724853515625,
        "lon": 33.32305792000000366215317626483738422393798828125
    },
    "bbox": {
        "min_lat": 34.70960000000000178488335222937166690826416015625,
        "min_lon": 33.323031700000001364969648420810699462890625,
        "max_lat": 34.70965170000000199479472939856350421905517578125,
        "max_lon": 33.323098299999998062048689462244510650634765625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 23, 2026 03:08 UTC 80/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 317 meters
  • Average Distance: 323 meters
  • Duration: 4h 42m
  • Period: 2026-08-23T03:25:28+00:00 to 2026-08-23T08:07:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 317m, avg 322m) for 282 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 322m
Duration25/25Duration 282 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 317,
    "avg_distance_m": 322.5,
    "distance_consistency_m": 3.5,
    "duration_minutes": 282,
    "overlap_duration_s": 16918,
    "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": "2026-08-23T03:25:28+00:00",
        "end": "2026-08-23T08:07:26+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 322m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 282 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 Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 317m, avg 322m) for 282 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 23, 2026 03:00 UTC 80/100 ▼
Vessel A: IMO 9328340 (OCEAN MARINER) LIBERIA
Vessel B: IMO 9403334 (AVANTI) MARSHALL ISLANDS
  • Minimum Distance: 65 meters
  • Average Distance: 71 meters
  • Duration: 51 minutes
  • Period: 2026-08-23T03:00:24+00:00 to 2026-08-23T03:51:24+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (OCEAN MARINER and AVANTI) maintained close proximity (min 65m, avg 71m) for 51 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 65m, avg 71m
Duration10/25Duration 51 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 64.599999999999994315658113919198513031005859375,
    "avg_distance_m": 71,
    "distance_consistency_m": 4.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 51,
    "overlap_duration_s": 3060,
    "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": "2026-08-23T03:00:24+00:00",
        "end": "2026-08-23T03:51:24+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 65m, avg 71m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 51 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 Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (OCEAN MARINER and AVANTI) maintained close proximity (min 65m, avg 71m) for 51 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 23, 2026 02:50 UTC 80/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 317 meters
  • Average Distance: 323 meters
  • Duration: 5h 9m
  • Period: 2026-08-23T02:58:27+00:00 to 2026-08-23T08:07:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 317m, avg 323m) for 309 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 323m
Duration25/25Duration 309 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 317,
    "avg_distance_m": 323.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 3.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 309,
    "overlap_duration_s": 18539,
    "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": "2026-08-23T02:58:27+00:00",
        "end": "2026-08-23T08:07:26+00:00"
    },
    "points_count": {
        "vessel_a": 22,
        "vessel_b": 22
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 323m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 309 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 Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 317m, avg 323m) for 309 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 23, 2026 02:25 UTC 85/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9328340 (OCEAN MARINER) LIBERIA
  • Minimum Distance: 65 meters
  • Average Distance: 71 meters
  • Duration: 1h 21m
  • Period: 2026-08-23T02:25:26+00:00 to 2026-08-23T03:46:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 65m, avg 71m) for 81 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 65m, avg 71m
Duration15/25Duration 81 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T08:00:06.563241+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.599999999999994315658113919198513031005859375,
    "avg_distance_m": 71.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 3.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 81,
    "overlap_duration_s": 4859,
    "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": "2026-08-23T02:25:26+00:00",
        "end": "2026-08-23T03:46:25+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 65m, avg 71m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 81 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 65m, avg 71m) for 81 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70987269999999824676706339232623577117919921875,
            "lon": 33.32280370000000147001628647558391094207763671875
        },
        "time_window": {
            "start_ts": "2026-08-23T02:25:26+00:00",
            "end_ts": "2026-08-23T03:46:25+00:00"
        },
        "searched_at": "2026-08-23T08:00:06.563241+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 02:25 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 18m
  • Data Points: 25 AIS positions
  • Period: 2026-08-23T02:58:27+00:00 to 2026-08-23T09:16:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 378,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-08-23T02:58:27+00:00",
        "lat": 34.70964500000000185764292837120592594146728515625,
        "lon": 33.32304169999999743367880000732839107513427734375
    },
    "last_point": {
        "ts": "2026-08-23T09:16:27+00:00",
        "lat": 34.7096183000000024776454665698111057281494140625,
        "lon": 33.32306330000000116342562250792980194091796875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 23, 2026 02:25 UTC 75.0% ▼
  • Duration: 6h 18m
  • Radius: 4 meters
  • Data Points: 25 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4,
    "duration_minutes": 378,
    "points": 25,
    "centroid": {
        "lat": 34.70962353999999550069333054125308990478515625,
        "lon": 33.32305660799999458276943187229335308074951171875
    },
    "bbox": {
        "min_lat": 34.70960000000000178488335222937166690826416015625,
        "min_lon": 33.323031700000001364969648420810699462890625,
        "max_lat": 34.70964500000000185764292837120592594146728515625,
        "max_lon": 33.323098299999998062048689462244510650634765625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 23, 2026 01:13 UTC 80/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 317 meters
  • Average Distance: 323 meters
  • Duration: 5h 12m
  • Period: 2026-08-23T01:13:25+00:00 to 2026-08-23T06:25:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 317m, avg 323m) for 312 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 323m
Duration25/25Duration 312 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T07:45:13.031234+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 317,
    "avg_distance_m": 323.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 312,
    "overlap_duration_s": 18721,
    "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": "2026-08-23T01:13:25+00:00",
        "end": "2026-08-23T06:25:26+00:00"
    },
    "points_count": {
        "vessel_a": 26,
        "vessel_b": 26
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 323m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 312 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 317m, avg 323m) for 312 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70886159999999875935827731154859066009521484375,
            "lon": 33.32155110000000064474079408682882785797119140625
        },
        "time_window": {
            "start_ts": "2026-08-23T01:13:25+00:00",
            "end_ts": "2026-08-23T06:25:26+00:00"
        },
        "searched_at": "2026-08-23T07:45:13.031234+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 01:13 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 5h 12m
  • Data Points: 26 AIS positions
  • Period: 2026-08-23T01:13:25+00:00 to 2026-08-23T06:25:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 312,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-08-23T01:13:25+00:00",
        "lat": 34.7096183000000024776454665698111057281494140625,
        "lon": 33.3230750000000028876456781290471553802490234375
    },
    "last_point": {
        "ts": "2026-08-23T06:25:26+00:00",
        "lat": 34.70960500000000337195160682313144207000732421875,
        "lon": 33.3230549999999965393726597540080547332763671875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 23, 2026 01:13 UTC 75.0% ▼
  • Duration: 5h 12m
  • Radius: 3 meters
  • Data Points: 26 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 312,
    "points": 26,
    "centroid": {
        "lat": 34.70962359615383974187352578155696392059326171875,
        "lon": 33.32305519999999177116478676907718181610107421875
    },
    "bbox": {
        "min_lat": 34.70960000000000178488335222937166690826416015625,
        "min_lon": 33.323031700000001364969648420810699462890625,
        "max_lat": 34.70965170000000199479472939856350421905517578125,
        "max_lon": 33.32307670000000143772922456264495849609375
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 23, 2026 00:31 UTC 80/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 317 meters
  • Average Distance: 324 meters
  • Duration: 5h 54m
  • Period: 2026-08-23T00:31:26+00:00 to 2026-08-23T06:25:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 317m, avg 324m) for 354 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 324m
Duration25/25Duration 354 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 317,
    "avg_distance_m": 323.5,
    "distance_consistency_m": 3.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 354,
    "overlap_duration_s": 21240,
    "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": "2026-08-23T00:31:26+00:00",
        "end": "2026-08-23T06:25:26+00:00"
    },
    "points_count": {
        "vessel_a": 31,
        "vessel_b": 31
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 324m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 354 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 317m, avg 324m) for 354 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 23, 2026 00:09 UTC 95/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9328340 (OCEAN MARINER) LIBERIA
  • Minimum Distance: 65 meters
  • Average Distance: 71 meters
  • Duration: 3h 18m
  • Period: 2026-08-23T00:28:25+00:00 to 2026-08-23T03:46:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 65m, avg 71m) for 198 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 65m, avg 71m
Duration25/25Duration 198 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.599999999999994315658113919198513031005859375,
    "avg_distance_m": 71.2999999999999971578290569595992565155029296875,
    "distance_consistency_m": 3.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 198,
    "overlap_duration_s": 11880,
    "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": "2026-08-23T00:28:25+00:00",
        "end": "2026-08-23T03:46:25+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 65m, avg 71m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 198 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 65m, avg 71m) for 198 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 23, 2026 00:04 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 21m
  • Data Points: 34 AIS positions
  • Period: 2026-08-23T00:04:25+00:00 to 2026-08-23T06:25:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 381,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-08-23T00:04:25+00:00",
        "lat": 34.70961330000000089057721197605133056640625,
        "lon": 33.3230616999999966765244607813656330108642578125
    },
    "last_point": {
        "ts": "2026-08-23T06:25:26+00:00",
        "lat": 34.70960500000000337195160682313144207000732421875,
        "lon": 33.3230549999999965393726597540080547332763671875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 23, 2026 00:04 UTC 75.0% ▼
  • Duration: 6h 21m
  • Radius: 3 meters
  • Data Points: 34 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 381,
    "points": 34,
    "centroid": {
        "lat": 34.709622452941175652085803449153900146484375,
        "lon": 33.32305706470588546608269098214805126190185546875
    },
    "bbox": {
        "min_lat": 34.70960000000000178488335222937166690826416015625,
        "min_lon": 33.323031700000001364969648420810699462890625,
        "max_lat": 34.70965170000000199479472939856350421905517578125,
        "max_lon": 33.32307829999999881920302868820726871490478515625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 22, 2026 23:40 UTC 95/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9328340 (OCEAN MARINER) LIBERIA
  • Minimum Distance: 65 meters
  • Average Distance: 72 meters
  • Duration: 4h 6m
  • Period: 2026-08-22T23:40:27+00:00 to 2026-08-23T03:46:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 65m, avg 72m) for 246 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 65m, avg 72m
Duration25/25Duration 246 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.599999999999994315658113919198513031005859375,
    "avg_distance_m": 71.7000000000000028421709430404007434844970703125,
    "distance_consistency_m": 5.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 246,
    "overlap_duration_s": 14758,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.13000000000000000444089209850062616169452667236328125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.59999999999999997779553950749686919152736663818359375
        }
    },
    "time_window": {
        "start": "2026-08-22T23:40:27+00:00",
        "end": "2026-08-23T03:46:25+00:00"
    },
    "points_count": {
        "vessel_a": 23,
        "vessel_b": 23
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 65m, avg 72m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 246 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 65m, avg 72m) for 246 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 22, 2026 23:25 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 27m
  • Data Points: 35 AIS positions
  • Period: 2026-08-22T23:58:26+00:00 to 2026-08-23T06:25:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 387,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-08-22T23:58:26+00:00",
        "lat": 34.70961170000000350910340785048902034759521484375,
        "lon": 33.32305999999999812644091434776782989501953125
    },
    "last_point": {
        "ts": "2026-08-23T06:25:26+00:00",
        "lat": 34.70960500000000337195160682313144207000732421875,
        "lon": 33.3230549999999965393726597540080547332763671875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 22, 2026 23:25 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 3 meters
  • Data Points: 35 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 387,
    "points": 35,
    "centroid": {
        "lat": 34.70962214571428461340474314056336879730224609375,
        "lon": 33.32305714857142930895861354656517505645751953125
    },
    "bbox": {
        "min_lat": 34.70960000000000178488335222937166690826416015625,
        "min_lon": 33.323031700000001364969648420810699462890625,
        "max_lat": 34.70965170000000199479472939856350421905517578125,
        "max_lon": 33.32307829999999881920302868820726871490478515625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 22, 2026 23:20 UTC 80/100 ▼
Vessel A: IMO 9391385 (LADYBUG) Liberia
Vessel B: IMO 9403334 (AVANTI) MARSHALL ISLANDS
  • Minimum Distance: 323 meters
  • Average Distance: 326 meters
  • Duration: 2h 12m
  • Period: 2026-08-22T23:20:34+00:00 to 2026-08-23T01:32:35+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (LADYBUG and AVANTI) maintained close proximity (min 323m, avg 326m) for 132 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 323m, avg 326m
Duration25/25Duration 132 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 323.3999999999999772626324556767940521240234375,
    "avg_distance_m": 325.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 132,
    "overlap_duration_s": 7921,
    "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": "2026-08-22T23:20:34+00:00",
        "end": "2026-08-23T01:32:35+00:00"
    },
    "points_count": {
        "vessel_a": 13,
        "vessel_b": 13
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 323m, avg 326m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 132 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (LADYBUG and AVANTI) maintained close proximity (min 323m, avg 326m) for 132 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 22, 2026 22:52 UTC 95/100 ▼
Vessel A: IMO 9328340 (OCEAN MARINER) LIBERIA
Vessel B: IMO 9403334 (AVANTI) MARSHALL ISLANDS
  • Minimum Distance: 66 meters
  • Average Distance: 72 meters
  • Duration: 2h 35m
  • Period: 2026-08-22T22:52:10+00:00 to 2026-08-23T01:27:24+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (OCEAN MARINER and AVANTI) maintained close proximity (min 66m, avg 72m) for 155 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 66m, avg 72m
Duration25/25Duration 155 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±7m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 65.900000000000005684341886080801486968994140625,
    "avg_distance_m": 72.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 7.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 155.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 9314,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.179999999999999993338661852249060757458209991455078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.59999999999999997779553950749686919152736663818359375
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-22T22:52:10+00:00",
        "end": "2026-08-23T01:27:24+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 66m, avg 72m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 155 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (OCEAN MARINER and AVANTI) maintained close proximity (min 66m, avg 72m) for 155 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 22, 2026 22:01 UTC 70/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 324 meters
  • Average Distance: 325 meters
  • Duration: 1h 24m
  • Period: 2026-08-22T22:01:26+00:00 to 2026-08-22T23:25:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 324m, avg 325m) for 84 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 324m, avg 325m
Duration15/25Duration 84 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T04:45:08.091244+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 324.19999999999998863131622783839702606201171875,
    "avg_distance_m": 325.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 0.90000000000000002220446049250313080847263336181640625,
    "duration_minutes": 84,
    "overlap_duration_s": 5039,
    "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": "2026-08-22T22:01:26+00:00",
        "end": "2026-08-22T23:25:25+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 324m, avg 325m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 84 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 324m, avg 325m) for 84 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 Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70886449999999712190401623956859111785888671875,
            "lon": 33.32155370000000260688466369174420833587646484375
        },
        "time_window": {
            "start_ts": "2026-08-22T22:01:26+00:00",
            "end_ts": "2026-08-22T23:25:25+00:00"
        },
        "searched_at": "2026-08-23T04:45:08.091244+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 22, 2026 22:01 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 33 AIS positions
  • Period: 2026-08-22T22:55:25+00:00 to 2026-08-23T05:25:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-08-22T22:55:25+00:00",
        "lat": 34.70963330000000013342287275008857250213623046875,
        "lon": 33.32306330000000116342562250792980194091796875
    },
    "last_point": {
        "ts": "2026-08-23T05:25:26+00:00",
        "lat": 34.7096183000000024776454665698111057281494140625,
        "lon": 33.32305999999999812644091434776782989501953125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 22, 2026 22:01 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 3 meters
  • Data Points: 33 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 2.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 390,
    "points": 33,
    "centroid": {
        "lat": 34.70962550606060403879382647573947906494140625,
        "lon": 33.3230598484848457019324996508657932281494140625
    },
    "bbox": {
        "min_lat": 34.70960170000000033496689866296947002410888671875,
        "min_lon": 33.32303830000000033351170714013278484344482421875,
        "max_lat": 34.70965170000000199479472939856350421905517578125,
        "max_lon": 33.32307829999999881920302868820726871490478515625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 22, 2026 21:13 UTC 80/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 324 meters
  • Average Distance: 326 meters
  • Duration: 2 hours
  • Period: 2026-08-22T21:25:25+00:00 to 2026-08-22T23:25:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 324m, avg 326m) for 120 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 324m, avg 326m
Duration25/25Duration 120 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T04:00:04.767630+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 324.19999999999998863131622783839702606201171875,
    "avg_distance_m": 325.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 120,
    "overlap_duration_s": 7200,
    "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": "2026-08-22T21:25:25+00:00",
        "end": "2026-08-22T23:25:25+00:00"
    },
    "points_count": {
        "vessel_a": 10,
        "vessel_b": 10
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 324m, avg 326m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 120 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 324m, avg 326m) for 120 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70886200000000343379724654369056224822998046875,
            "lon": 33.32155250000000279442247119732201099395751953125
        },
        "time_window": {
            "start_ts": "2026-08-22T21:13:25+00:00",
            "end_ts": "2026-08-22T23:25:25+00:00"
        },
        "searched_at": "2026-08-23T04:00:04.767630+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 22, 2026 21:10 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 27m
  • Data Points: 34 AIS positions
  • Period: 2026-08-22T21:58:25+00:00 to 2026-08-23T04:25:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 387,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-08-22T21:58:25+00:00",
        "lat": 34.70963830000000172049112734384834766387939453125,
        "lon": 33.32309670000000068057488533668220043182373046875
    },
    "last_point": {
        "ts": "2026-08-23T04:25:26+00:00",
        "lat": 34.70963330000000013342287275008857250213623046875,
        "lon": 33.32304169999999743367880000732839107513427734375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 22, 2026 21:10 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 3 meters
  • Data Points: 34 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 387,
    "points": 34,
    "centroid": {
        "lat": 34.70962754999999333449522964656352996826171875,
        "lon": 33.32306240294118282463387004099786281585693359375
    },
    "bbox": {
        "min_lat": 34.70961170000000350910340785048902034759521484375,
        "min_lon": 33.32303999999999888359525357373058795928955078125,
        "max_lat": 34.70965170000000199479472939856350421905517578125,
        "max_lon": 33.32309670000000068057488533668220043182373046875
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 22, 2026 21:08 UTC 90/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9328340 (OCEAN MARINER) LIBERIA
  • Minimum Distance: 69 meters
  • Average Distance: 72 meters
  • Duration: 1h 45m
  • Period: 2026-08-22T21:10:25+00:00 to 2026-08-22T22:55:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 69m, avg 72m) for 105 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 69m, avg 72m
Duration20/25Duration 105 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 69.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 71.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 105,
    "overlap_duration_s": 6300,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-22T21:10:25+00:00",
        "end": "2026-08-22T22:55:25+00:00"
    },
    "points_count": {
        "vessel_a": 10,
        "vessel_b": 10
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 69m, avg 72m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 105 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 69m, avg 72m) for 105 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 22, 2026 20:58 UTC 90/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9328340 (OCEAN MARINER) LIBERIA
  • Minimum Distance: 69 meters
  • Average Distance: 72 meters
  • Duration: 1h 57m
  • Period: 2026-08-22T20:58:27+00:00 to 2026-08-22T22:55:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 69m, avg 72m) for 117 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 69m, avg 72m
Duration20/25Duration 117 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 69.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 71.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 2,
    "duration_minutes": 117,
    "overlap_duration_s": 7018,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-22T20:58:27+00:00",
        "end": "2026-08-22T22:55:25+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 69m, avg 72m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 117 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 69m, avg 72m) for 117 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 22, 2026 20:08 UTC 80/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 321 meters
  • Average Distance: 326 meters
  • Duration: 3h 24m
  • Period: 2026-08-22T20:01:26+00:00 to 2026-08-22T23:25:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 321m, avg 326m) for 204 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 321m, avg 326m
Duration25/25Duration 204 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 321.1000000000000227373675443232059478759765625,
    "avg_distance_m": 325.5,
    "distance_consistency_m": 1.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 204,
    "overlap_duration_s": 12239,
    "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": "2026-08-22T20:01:26+00:00",
        "end": "2026-08-22T23:25:25+00:00"
    },
    "points_count": {
        "vessel_a": 18,
        "vessel_b": 18
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 321m, avg 326m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 204 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 321m, avg 326m) for 204 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 22, 2026 20:01 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 33 AIS positions
  • Period: 2026-08-22T20:52:27+00:00 to 2026-08-23T03:25:28+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-08-22T20:52:27+00:00",
        "lat": 34.70962999999999709643816458992660045623779296875,
        "lon": 33.3230683000000027504938771016895771026611328125
    },
    "last_point": {
        "ts": "2026-08-23T03:25:28+00:00",
        "lat": 34.70963330000000013342287275008857250213623046875,
        "lon": 33.32303999999999888359525357373058795928955078125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 22, 2026 20:01 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 3 meters
  • Data Points: 33 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 393,
    "points": 33,
    "centroid": {
        "lat": 34.709628633333323932674829848110675811767578125,
        "lon": 33.323062321212120195923489518463611602783203125
    },
    "bbox": {
        "min_lat": 34.70961170000000350910340785048902034759521484375,
        "min_lon": 33.3230367000000029520379030145704746246337890625,
        "max_lat": 34.70965170000000199479472939856350421905517578125,
        "max_lon": 33.32309670000000068057488533668220043182373046875
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 22, 2026 19:37 UTC 80/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 321 meters
  • Average Distance: 326 meters
  • Duration: 3h 48m
  • Period: 2026-08-22T19:37:26+00:00 to 2026-08-22T23:25:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 321m, avg 326m) for 228 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 321m, avg 326m
Duration25/25Duration 228 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T01:45:02.318329+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 321.1000000000000227373675443232059478759765625,
    "avg_distance_m": 325.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 228,
    "overlap_duration_s": 13679,
    "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": "2026-08-22T19:37:26+00:00",
        "end": "2026-08-22T23:25:25+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 321m, avg 326m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 228 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 321m, avg 326m) for 228 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 Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70886879999999763413143227808177471160888671875,
            "lon": 33.32155180000000171958163264207541942596435546875
        },
        "time_window": {
            "start_ts": "2026-08-22T19:37:26+00:00",
            "end_ts": "2026-08-22T23:25:25+00:00"
        },
        "searched_at": "2026-08-23T01:45:02.318329+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 22, 2026 19:32 UTC 95/100 ▼
Vessel A: IMO 9328340 (OCEAN MARINER) LIBERIA
Vessel B: IMO 9403334 (AVANTI) MARSHALL ISLANDS
  • Minimum Distance: 64 meters
  • Average Distance: 72 meters
  • Duration: 3h 3m
  • Period: 2026-08-22T19:32:19+00:00 to 2026-08-22T22:35:19+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (OCEAN MARINER and AVANTI) maintained close proximity (min 64m, avg 72m) for 183 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 72m
Duration25/25Duration 183 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 63.5,
    "avg_distance_m": 71.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 183,
    "overlap_duration_s": 10980,
    "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": "2026-08-22T19:32:19+00:00",
        "end": "2026-08-22T22:35:19+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 72m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 183 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (OCEAN MARINER and AVANTI) maintained close proximity (min 64m, avg 72m) for 183 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 Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 22, 2026 19:01 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 33 AIS positions
  • Period: 2026-08-22T19:01:26+00:00 to 2026-08-23T01:25:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 384,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-08-22T19:01:26+00:00",
        "lat": 34.70959830000000323479980579577386379241943359375,
        "lon": 33.3230750000000028876456781290471553802490234375
    },
    "last_point": {
        "ts": "2026-08-23T01:25:27+00:00",
        "lat": 34.70962829999999854635461815632879734039306640625,
        "lon": 33.3230649999999997135091689415276050567626953125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 22, 2026 19:01 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 4 meters
  • Data Points: 33 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 384,
    "points": 33,
    "centroid": {
        "lat": 34.7096299454545516027792473323643207550048828125,
        "lon": 33.32306449393939118408525246195495128631591796875
    },
    "bbox": {
        "min_lat": 34.70959830000000323479980579577386379241943359375,
        "min_lon": 33.3230367000000029520379030145704746246337890625,
        "max_lat": 34.7096599999999995134203345514833927154541015625,
        "max_lon": 33.32309670000000068057488533668220043182373046875
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 22, 2026 18:40 UTC 80/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9391385 (LADYBUG) Liberia
  • Minimum Distance: 321 meters
  • Average Distance: 326 meters
  • Duration: 4h 45m
  • Period: 2026-08-22T18:40:25+00:00 to 2026-08-22T23:25:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 321m, avg 326m) for 285 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 321m, avg 326m
Duration25/25Duration 285 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021850,
        "imo": 9391385,
        "name": "LADYBUG",
        "flag": "Liberia"
    },
    "min_distance_m": 321.1000000000000227373675443232059478759765625,
    "avg_distance_m": 325.5,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 285,
    "overlap_duration_s": 17100,
    "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": "2026-08-22T18:40:25+00:00",
        "end": "2026-08-22T23:25:25+00:00"
    },
    "points_count": {
        "vessel_a": 23,
        "vessel_b": 23
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 321m, avg 326m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 285 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and LADYBUG) maintained close proximity (min 321m, avg 326m) for 285 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 22, 2026 18:40 UTC 80/100 ▼
Vessel A: IMO 9374337 (KASHI) INDIA
Vessel B: IMO 9403334 (AVANTI) MARSHALL ISLANDS
  • Minimum Distance: 313 meters
  • Average Distance: 315 meters
  • Duration: 2h 6m
  • Period: 2026-08-22T18:40:19+00:00 to 2026-08-22T20:46:19+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (KASHI and AVANTI) maintained close proximity (min 313m, avg 315m) for 126 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 Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 313m, avg 315m
Duration25/25Duration 126 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T00:45:15.131997+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 419001875,
        "imo": 9374337,
        "name": "KASHI",
        "flag": "INDIA"
    },
    "vessel_b": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 312.69999999999998863131622783839702606201171875,
    "avg_distance_m": 315.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 126,
    "overlap_duration_s": 7560,
    "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": "2026-08-22T18:40:19+00:00",
        "end": "2026-08-22T20:46:19+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 313m, avg 315m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 126 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (KASHI and AVANTI) maintained close proximity (min 313m, avg 315m) for 126 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 Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70865210000000189438651432283222675323486328125,
            "lon": 33.3218308000000007496055332012474536895751953125
        },
        "time_window": {
            "start_ts": "2026-08-22T18:40:19+00:00",
            "end_ts": "2026-08-22T20:46:19+00:00"
        },
        "searched_at": "2026-08-23T00:45:15.131997+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 22, 2026 18:37 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 34 AIS positions
  • Period: 2026-08-22T18:52:26+00:00 to 2026-08-23T01:25:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-08-22T18:52:26+00:00",
        "lat": 34.70961170000000350910340785048902034759521484375,
        "lon": 33.32307829999999881920302868820726871490478515625
    },
    "last_point": {
        "ts": "2026-08-23T01:25:27+00:00",
        "lat": 34.70962829999999854635461815632879734039306640625,
        "lon": 33.3230649999999997135091689415276050567626953125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 22, 2026 18:37 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 4 meters
  • Data Points: 34 AIS positions
  • Centroid: 34.7096, 33.3231
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 3.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 393,
    "points": 34,
    "centroid": {
        "lat": 34.70962940882353819915806525386869907379150390625,
        "lon": 33.3230649000000056503267842344939708709716796875
    },
    "bbox": {
        "min_lat": 34.70959830000000323479980579577386379241943359375,
        "min_lon": 33.3230367000000029520379030145704746246337890625,
        "max_lat": 34.7096599999999995134203345514833927154541015625,
        "max_lon": 33.32309670000000068057488533668220043182373046875
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 22, 2026 18:32 UTC 90/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9328340 (OCEAN MARINER) LIBERIA
  • Minimum Distance: 53 meters
  • Average Distance: 67 meters
  • Duration: 1h 39m
  • Period: 2026-08-22T18:46:26+00:00 to 2026-08-22T20:25:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 52m, avg 67m) for 99 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 52m, avg 67m
Duration20/25Duration 99 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±10m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 52.5,
    "avg_distance_m": 67,
    "distance_consistency_m": 9.800000000000000710542735760100185871124267578125,
    "duration_minutes": 99,
    "overlap_duration_s": 5939,
    "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": "2026-08-22T18:46:26+00:00",
        "end": "2026-08-22T20:25:25+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 52m, avg 67m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 99 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 52m, avg 67m) for 99 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 22, 2026 17:43 UTC 95/100 ▼
Vessel A: IMO 9403334 (AVANTI) MARSHALL ISLANDS
Vessel B: IMO 9328340 (OCEAN MARINER) LIBERIA
  • Minimum Distance: 53 meters
  • Average Distance: 67 meters
  • Duration: 2h 42m
  • Period: 2026-08-22T17:43:26+00:00 to 2026-08-22T20:25:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 52m, avg 67m) for 162 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 52m, avg 67m
Duration25/25Duration 162 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±8m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-23T00:00:01.746536+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008411,
        "imo": 9403334,
        "name": "AVANTI",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 636021918,
        "imo": 9328340,
        "name": "OCEAN MARINER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 52.5,
    "avg_distance_m": 66.7000000000000028421709430404007434844970703125,
    "distance_consistency_m": 8.199999999999999289457264239899814128875732421875,
    "duration_minutes": 162,
    "overlap_duration_s": 9719,
    "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": "2026-08-22T17:43:26+00:00",
        "end": "2026-08-22T20:25:25+00:00"
    },
    "points_count": {
        "vessel_a": 13,
        "vessel_b": 13
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 52m, avg 67m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 162 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b18m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AVANTI and OCEAN MARINER) maintained close proximity (min 52m, avg 67m) for 162 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7098596000000014782926882617175579071044921875,
            "lon": 33.32284130000000033078322303481400012969970703125
        },
        "time_window": {
            "start_ts": "2026-08-22T17:43:26+00:00",
            "end_ts": "2026-08-22T20:25:25+00:00"
        },
        "searched_at": "2026-08-23T00:00:01.746536+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Sep 10 03:14 35.1811 35.8944 0.0 kn 238.0° Malacca Strait Surveillance Zone
Sep 9 13:32 35.1802 35.8973 0.0 kn 103.7° Malacca Strait Surveillance Zone
Sep 9 13:26 35.1801 35.8973 0.0 kn 103.7° Malacca Strait Surveillance Zone
Sep 9 10:26 35.1805 35.8973 0.0 kn 103.7° Malacca Strait Surveillance Zone
Sep 9 10:23 35.1805 35.8973 0.0 kn 103.7° Malacca Strait Surveillance Zone
Sep 9 10:20 35.1806 35.8972 0.0 kn 103.7° Malacca Strait Surveillance Zone
Sep 9 06:32 35.1800 35.8971 0.0 kn 103.7° Malacca Strait Surveillance Zone
Sep 9 06:02 35.1804 35.8970 0.0 kn 103.7° Malacca Strait Surveillance Zone
Sep 9 05:44 35.1809 35.8967 0.0 kn 103.7° Malacca Strait Surveillance Zone
Sep 9 05:38 35.1811 35.8966 0.1 kn 103.7° Malacca Strait Surveillance Zone
Sep 9 05:32 35.1812 35.8964 0.1 kn 103.7° Malacca Strait Surveillance Zone
Sep 9 05:26 35.1813 35.8961 0.1 kn 103.7° Malacca Strait Surveillance Zone
Sep 9 05:20 35.1814 35.8958 0.1 kn 103.7° Malacca Strait Surveillance Zone
Sep 9 04:11 35.1802 35.8939 0.8 kn 115.5° Malacca Strait Surveillance Zone
Sep 9 04:08 35.1801 35.8939 0.0 kn 38.5° Malacca Strait Surveillance Zone
Sep 9 04:00 35.1799 35.8939 0.0 kn 115.0° Malacca Strait Surveillance Zone
Sep 9 03:45 35.1797 35.8939 0.0 kn 115.0° Malacca Strait Surveillance Zone
Sep 9 03:42 35.1797 35.8940 0.2 kn 117.2° Malacca Strait Surveillance Zone
Sep 9 03:39 35.1796 35.8939 0.0 kn 48.9° Malacca Strait Surveillance Zone
Sep 9 03:33 35.1795 35.8939 0.0 kn 298.1° Malacca Strait Surveillance Zone

Showing 20 of 100 recent positions.

Data Source

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

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