ARVES OIL

IMO 8883290

Vessel information

Vessel Name ARVES OIL
IMO Number 8883290
MMSI 613911403
Vessel Type Tanker
Flag 🇨🇲 CAMEROON
Call Sign TJM5PG
Length 87 m
Beam 12 m

Detected Events (42)

Zone Dwell North Sea Monitoring Zone
Jul 18, 2026 15:02 UTC 80.0% ▼
  • Zone: North Sea Monitoring Zone
  • Duration: 1h 29m
  • Data Points: 9 AIS positions
  • Period: 2026-07-18T15:02:33+00:00 to 2026-07-18T16:32:23+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_122",
    "zone_name": "North Sea Monitoring Zone",
    "dwell_minutes": 89.7999999999999971578290569595992565155029296875,
    "points_in_zone": 9,
    "first_point": {
        "ts": "2026-07-18T15:02:33+00:00",
        "lat": 37.5715067000000004782123141922056674957275390625,
        "lon": 24.411484999999998990460881032049655914306640625
    },
    "last_point": {
        "ts": "2026-07-18T16:32:23+00:00",
        "lat": 37.41222330000000084737621364183723926544189453125,
        "lon": 24.30875830000000092923073680140078067779541015625
    }
}
Methodology: 2026.01.18
Zone Dwell North Sea Monitoring Zone
Jul 18, 2026 14:44 UTC 80.0% ▼
  • Zone: North Sea Monitoring Zone
  • Duration: 1h 47m
  • Data Points: 11 AIS positions
  • Period: 2026-07-18T14:44:43+00:00 to 2026-07-18T16:32:23+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_122",
    "zone_name": "North Sea Monitoring Zone",
    "dwell_minutes": 107.7000000000000028421709430404007434844970703125,
    "points_in_zone": 11,
    "first_point": {
        "ts": "2026-07-18T14:44:43+00:00",
        "lat": 37.60327170000000052141331252641975879669189453125,
        "lon": 24.4296216999999984409441822208464145660400390625
    },
    "last_point": {
        "ts": "2026-07-18T16:32:23+00:00",
        "lat": 37.41222330000000084737621364183723926544189453125,
        "lon": 24.30875830000000092923073680140078067779541015625
    }
}
Methodology: 2026.01.18
Zone Dwell North Sea Monitoring Zone
Jul 18, 2026 13:35 UTC 80.0% ▼
  • Zone: North Sea Monitoring Zone
  • Duration: 2h 56m
  • Data Points: 12 AIS positions
  • Period: 2026-07-18T13:35:53+00:00 to 2026-07-18T16:32:23+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_122",
    "zone_name": "North Sea Monitoring Zone",
    "dwell_minutes": 176.5,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-07-18T13:35:53+00:00",
        "lat": 37.7214866999999998142811818979680538177490234375,
        "lon": 24.491556700000000290629031951539218425750732421875
    },
    "last_point": {
        "ts": "2026-07-18T16:32:23+00:00",
        "lat": 37.41222330000000084737621364183723926544189453125,
        "lon": 24.30875830000000092923073680140078067779541015625
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Monitoring Zone
Jul 12, 2026 20:10 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Monitoring Zone
  • Duration: 2h 52m
  • Data Points: 7 AIS positions
  • Period: 2026-07-12T20:10:10+00:00 to 2026-07-12T23:02:19+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "dwell_minutes": 172.19999999999998863131622783839702606201171875,
    "points_in_zone": 7,
    "first_point": {
        "ts": "2026-07-12T20:10:10+00:00",
        "lat": 40.6534817000000003872628440149128437042236328125,
        "lon": 28.053108300000001662510840105824172496795654296875
    },
    "last_point": {
        "ts": "2026-07-12T23:02:19+00:00",
        "lat": 40.649231700000001410444383509457111358642578125,
        "lon": 27.97961169999999953006408759392797946929931640625
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Monitoring Zone
Jul 12, 2026 19:02 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Monitoring Zone
  • Duration: 3h 59m
  • Data Points: 11 AIS positions
  • Period: 2026-07-12T19:02:41+00:00 to 2026-07-12T23:02:19+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "dwell_minutes": 239.599999999999994315658113919198513031005859375,
    "points_in_zone": 11,
    "first_point": {
        "ts": "2026-07-12T19:02:41+00:00",
        "lat": 40.6496599999999972396835801191627979278564453125,
        "lon": 28.09075500000000147338141687214374542236328125
    },
    "last_point": {
        "ts": "2026-07-12T23:02:19+00:00",
        "lat": 40.649231700000001410444383509457111358642578125,
        "lon": 27.97961169999999953006408759392797946929931640625
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Monitoring Zone
Jul 12, 2026 18:29 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Monitoring Zone
  • Duration: 4h 33m
  • Data Points: 18 AIS positions
  • Period: 2026-07-12T18:29:20+00:00 to 2026-07-12T23:02:19+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "dwell_minutes": 273,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-07-12T18:29:20+00:00",
        "lat": 40.65051330000000007203198038041591644287109375,
        "lon": 28.1046367000000003599780029617249965667724609375
    },
    "last_point": {
        "ts": "2026-07-12T23:02:19+00:00",
        "lat": 40.649231700000001410444383509457111358642578125,
        "lon": 27.97961169999999953006408759392797946929931640625
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Monitoring Zone
Jul 12, 2026 17:42 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Monitoring Zone
  • Duration: 5h 20m
  • Data Points: 21 AIS positions
  • Period: 2026-07-12T17:42:21+00:00 to 2026-07-12T23:02:19+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "dwell_minutes": 320,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-07-12T17:42:21+00:00",
        "lat": 40.65473329999999663186827092431485652923583984375,
        "lon": 28.12312670000000025538611225783824920654296875
    },
    "last_point": {
        "ts": "2026-07-12T23:02:19+00:00",
        "lat": 40.649231700000001410444383509457111358642578125,
        "lon": 27.97961169999999953006408759392797946929931640625
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 11, 2026 11:17 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 2h 23m
  • Data Points: 8 AIS positions
  • Period: 2026-07-11T11:17:50+00:00 to 2026-07-11T13:41:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 143.80000000000001136868377216160297393798828125,
    "points_in_zone": 8,
    "first_point": {
        "ts": "2026-07-11T11:17:50+00:00",
        "lat": 40.72673830000000094742063083685934543609619140625,
        "lon": 28.528208299999999297824615496210753917694091796875
    },
    "last_point": {
        "ts": "2026-07-11T13:41:41+00:00",
        "lat": 40.7140016999999971858414937742054462432861328125,
        "lon": 28.516711699999998330667949630878865718841552734375
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 11, 2026 09:05 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 4h 36m
  • Data Points: 11 AIS positions
  • Period: 2026-07-11T09:05:30+00:00 to 2026-07-11T13:41:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 276.19999999999998863131622783839702606201171875,
    "points_in_zone": 11,
    "first_point": {
        "ts": "2026-07-11T09:05:30+00:00",
        "lat": 40.743881700000002865635906346142292022705078125,
        "lon": 28.550656700000001109174263547174632549285888671875
    },
    "last_point": {
        "ts": "2026-07-11T13:41:41+00:00",
        "lat": 40.7140016999999971858414937742054462432861328125,
        "lon": 28.516711699999998330667949630878865718841552734375
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 11, 2026 08:02 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 5h 39m
  • Data Points: 17 AIS positions
  • Period: 2026-07-11T08:02:21+00:00 to 2026-07-11T13:41:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 339.30000000000001136868377216160297393798828125,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-07-11T08:02:21+00:00",
        "lat": 40.75500170000000110803739516995847225189208984375,
        "lon": 28.5605182999999982484951033256947994232177734375
    },
    "last_point": {
        "ts": "2026-07-11T13:41:41+00:00",
        "lat": 40.7140016999999971858414937742054462432861328125,
        "lon": 28.516711699999998330667949630878865718841552734375
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 11, 2026 07:54 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 5h 47m
  • Data Points: 19 AIS positions
  • Period: 2026-07-11T07:54:40+00:00 to 2026-07-11T13:41:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 347,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-07-11T07:54:40+00:00",
        "lat": 40.75652670000000199479472939856350421905517578125,
        "lon": 28.561748300000001421494744135998189449310302734375
    },
    "last_point": {
        "ts": "2026-07-11T13:41:41+00:00",
        "lat": 40.7140016999999971858414937742054462432861328125,
        "lon": 28.516711699999998330667949630878865718841552734375
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 11, 2026 06:54 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 33m
  • Data Points: 18 AIS positions
  • Period: 2026-07-11T06:54:10+00:00 to 2026-07-11T13:27:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 393,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-07-11T06:54:10+00:00",
        "lat": 40.76357829999999893288986640982329845428466796875,
        "lon": 28.57049500000000108457243186421692371368408203125
    },
    "last_point": {
        "ts": "2026-07-11T13:27:11+00:00",
        "lat": 40.71609000000000122554411063902080059051513671875,
        "lon": 28.517198300000000443787939730100333690643310546875
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 11, 2026 05:02 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 29m
  • Data Points: 19 AIS positions
  • Period: 2026-07-11T05:02:01+00:00 to 2026-07-11T11:31:01+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 389,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-07-11T05:02:01+00:00",
        "lat": 40.87380329999999872825355851091444492340087890625,
        "lon": 28.55796169999999989386196830309927463531494140625
    },
    "last_point": {
        "ts": "2026-07-11T11:31:01+00:00",
        "lat": 40.72558500000000236695996136404573917388916015625,
        "lon": 28.525864999999999582769305561669170856475830078125
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 11, 2026 04:05 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 36m
  • Data Points: 19 AIS positions
  • Period: 2026-07-11T04:51:51+00:00 to 2026-07-11T11:28:30+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 396.6000000000000227373675443232059478759765625,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-07-11T04:51:51+00:00",
        "lat": 40.8781699999999972305886331014335155487060546875,
        "lon": 28.58200000000000073896444519050419330596923828125
    },
    "last_point": {
        "ts": "2026-07-11T11:28:30+00:00",
        "lat": 40.7258183000000002493834472261369228363037109375,
        "lon": 28.526276700000000374757291865535080432891845703125
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 11, 2026 03:46 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 5h 35m
  • Data Points: 29 AIS positions
  • Period: 2026-07-11T03:46:10+00:00 to 2026-07-11T09:21:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 335.5,
    "points_in_zone": 29,
    "first_point": {
        "ts": "2026-07-11T03:46:10+00:00",
        "lat": 40.9049949999999995498001226224005222320556640625,
        "lon": 28.745961699999998728571881656534969806671142578125
    },
    "last_point": {
        "ts": "2026-07-11T09:21:41+00:00",
        "lat": 40.74124669999999781566657475195825099945068359375,
        "lon": 28.5481367000000005873516784049570560455322265625
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 8, 2026 10:49 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 1h 3m
  • Data Points: 8 AIS positions
  • Period: 2026-07-08T10:49:51+00:00 to 2026-07-08T11:52:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 63,
    "points_in_zone": 8,
    "first_point": {
        "ts": "2026-07-08T10:49:51+00:00",
        "lat": 40.95960170000000033496689866296947002410888671875,
        "lon": 28.78860329999999834171831025741994380950927734375
    },
    "last_point": {
        "ts": "2026-07-08T11:52:52+00:00",
        "lat": 40.95969500000000351747075910679996013641357421875,
        "lon": 28.788838299999998326939021353609859943389892578125
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 8, 2026 09:34 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 2h 18m
  • Data Points: 10 AIS positions
  • Period: 2026-07-08T09:34:50+00:00 to 2026-07-08T11:52:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 138,
    "points_in_zone": 10,
    "first_point": {
        "ts": "2026-07-08T09:34:50+00:00",
        "lat": 40.9596700000000026875568437390029430389404296875,
        "lon": 28.788515000000000298996383207850158214569091796875
    },
    "last_point": {
        "ts": "2026-07-08T11:52:52+00:00",
        "lat": 40.95969500000000351747075910679996013641357421875,
        "lon": 28.788838299999998326939021353609859943389892578125
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 8, 2026 09:34 UTC 75.0% ▼
  • Duration: 2h 18m
  • Radius: 18 meters
  • Data Points: 10 AIS positions
  • Centroid: 40.9597, 28.7886
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 17.89999999999999857891452847979962825775146484375,
    "duration_minutes": 138,
    "points": 10,
    "centroid": {
        "lat": 40.9596858299999979635686031542718410491943359375,
        "lon": 28.78862566000000100530087365768849849700927734375
    },
    "bbox": {
        "min_lat": 40.95960170000000033496689866296947002410888671875,
        "min_lon": 28.78843669999999832498360774479806423187255859375,
        "max_lat": 40.95977330000000193876985576935112476348876953125,
        "max_lon": 28.788838299999998326939021353609859943389892578125
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 7, 2026 15:25 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 1h 24m
  • Data Points: 3 AIS positions
  • Period: 2026-07-07T15:25:40+00:00 to 2026-07-07T16:49:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 84,
    "points_in_zone": 3,
    "first_point": {
        "ts": "2026-07-07T15:25:40+00:00",
        "lat": 40.95875670000000212667146115563809871673583984375,
        "lon": 28.788426699999998703560777357779443264007568359375
    },
    "last_point": {
        "ts": "2026-07-07T16:49:41+00:00",
        "lat": 40.959243299999997134364093653857707977294921875,
        "lon": 28.787929999999999353121893364004790782928466796875
    }
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 7, 2026 14:21 UTC 75/100 ▼
Vessel A: IMO 8883290 (ARVES OIL) CAMEROON
Vessel B: IMO 9187837 (MONA) Panama
  • Minimum Distance: 458 meters
  • Average Distance: 472 meters
  • Duration: 2h 6m
  • Period: 2026-07-07T14:43:40+00:00 to 2026-07-07T16:49:41+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (ARVES OIL and MONA) maintained close proximity (min 458m, avg 472m) for 126 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 458m, avg 472m
Duration25/25Duration 126 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±11m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 613911403,
        "imo": 8883290,
        "name": "ARVES OIL",
        "flag": "CAMEROON"
    },
    "vessel_b": {
        "mmsi": 352004984,
        "imo": 9187837,
        "name": "MONA",
        "flag": "Panama"
    },
    "min_distance_m": 457.8999999999999772626324556767940521240234375,
    "avg_distance_m": 472.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 10.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 126,
    "overlap_duration_s": 7561,
    "speed_a_avg": 0.2200000000000000011102230246251565404236316680908203125,
    "speed_a_std": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_b_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.2200000000000000011102230246251565404236316680908203125,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-07T14:43:40+00:00",
        "end": "2026-07-07T16:49:41+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 458m, avg 472m"
            },
            "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 \u00b111m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ARVES OIL and MONA) maintained close proximity (min 458m, avg 472m) for 126 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 7, 2026 14:04 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 2h 45m
  • Data Points: 12 AIS positions
  • Period: 2026-07-07T14:04:40+00:00 to 2026-07-07T16:49:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 165,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-07-07T14:04:40+00:00",
        "lat": 40.9591300000000018144419300369918346405029296875,
        "lon": 28.788206699999999926831151242367923259735107421875
    },
    "last_point": {
        "ts": "2026-07-07T16:49:41+00:00",
        "lat": 40.959243299999997134364093653857707977294921875,
        "lon": 28.787929999999999353121893364004790782928466796875
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 7, 2026 14:04 UTC 75.0% ▼
  • Duration: 2h 45m
  • Radius: 51 meters
  • Data Points: 12 AIS positions
  • Centroid: 40.9589, 28.7883
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 50.5,
    "duration_minutes": 165,
    "points": 12,
    "centroid": {
        "lat": 40.958896516666669640471809543669223785400390625,
        "lon": 28.788282083333331939911658992059528827667236328125
    },
    "bbox": {
        "min_lat": 40.95866170000000039408405427820980548858642578125,
        "min_lon": 28.787929999999999353121893364004790782928466796875,
        "max_lat": 40.9592932999999987941919243894517421722412109375,
        "max_lon": 28.78857670000000013033059076406061649322509765625
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 7, 2026 13:21 UTC 55/100 ▼
Vessel A: IMO 9187837 (MONA) Panama
Vessel B: IMO 8883290 (ARVES OIL) CAMEROON
  • Minimum Distance: 494 meters
  • Average Distance: 494 meters
  • Duration: 36 minutes
  • Period: 2026-07-07T13:21:07+00:00 to 2026-07-07T13:57:07+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.3 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 55/100

Low-confidence STS candidate - may warrant review. Two tankers (MONA and ARVES OIL) maintained close proximity (min 494m, avg 494m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 494m, avg 494m
Duration5/25Duration 36 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-07T14:45:13.260566+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004984,
        "imo": 9187837,
        "name": "MONA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 613911403,
        "imo": 8883290,
        "name": "ARVES OIL",
        "flag": "CAMEROON"
    },
    "min_distance_m": 493.6000000000000227373675443232059478759765625,
    "avg_distance_m": 494.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 0.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 36,
    "overlap_duration_s": 2160,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.270000000000000017763568394002504646778106689453125,
    "speed_b_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.270000000000000017763568394002504646778106689453125,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-07-07T13:21:07+00:00",
        "end": "2026-07-07T13:57:07+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 55,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 494m, avg 494m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 36 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Low-confidence STS candidate - may warrant review. Two tankers (MONA and ARVES OIL) maintained close proximity (min 494m, avg 494m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.95675949999999687634044676087796688079833984375,
            "lon": 28.7871683999999987690898706205189228057861328125
        },
        "time_window": {
            "start_ts": "2026-07-07T13:21:07+00:00",
            "end_ts": "2026-07-07T13:57:07+00:00"
        },
        "searched_at": "2026-07-07T14:45:13.260566+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 7, 2026 13:10 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 3h 39m
  • Data Points: 18 AIS positions
  • Period: 2026-07-07T13:10:39+00:00 to 2026-07-07T16:49:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 219,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-07-07T13:10:39+00:00",
        "lat": 40.95897500000000235331754083745181560516357421875,
        "lon": 28.78826169999999962101355777122080326080322265625
    },
    "last_point": {
        "ts": "2026-07-07T16:49:41+00:00",
        "lat": 40.959243299999997134364093653857707977294921875,
        "lon": 28.787929999999999353121893364004790782928466796875
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 7, 2026 13:10 UTC 75.0% ▼
  • Duration: 3h 39m
  • Radius: 55 meters
  • Data Points: 18 AIS positions
  • Centroid: 40.9589, 28.7883
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 54.89999999999999857891452847979962825775146484375,
    "duration_minutes": 219,
    "points": 18,
    "centroid": {
        "lat": 40.9588643499999989217030815780162811279296875,
        "lon": 28.7883151888888875191696570254862308502197265625
    },
    "bbox": {
        "min_lat": 40.95857170000000024856490199454128742218017578125,
        "min_lon": 28.787929999999999353121893364004790782928466796875,
        "max_lat": 40.9592932999999987941919243894517421722412109375,
        "max_lon": 28.788726700000001557100404170341789722442626953125
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 7, 2026 12:40 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 4h 9m
  • Data Points: 21 AIS positions
  • Period: 2026-07-07T12:40:39+00:00 to 2026-07-07T16:49:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 249,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-07-07T12:40:39+00:00",
        "lat": 40.95859329999999687288436689414083957672119140625,
        "lon": 28.788701700000000727186488802544772624969482421875
    },
    "last_point": {
        "ts": "2026-07-07T16:49:41+00:00",
        "lat": 40.959243299999997134364093653857707977294921875,
        "lon": 28.787929999999999353121893364004790782928466796875
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 7, 2026 12:40 UTC 75.0% ▼
  • Duration: 4h 9m
  • Radius: 63 meters
  • Data Points: 21 AIS positions
  • Centroid: 40.9588, 28.7884
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 63.10000000000000142108547152020037174224853515625,
    "duration_minutes": 249,
    "points": 21,
    "centroid": {
        "lat": 40.95881682380953492383923730812966823577880859375,
        "lon": 28.78839849523809135689589311368763446807861328125
    },
    "bbox": {
        "min_lat": 40.95847499999999996589394868351519107818603515625,
        "min_lon": 28.787929999999999353121893364004790782928466796875,
        "max_lat": 40.9592932999999987941919243894517421722412109375,
        "max_lon": 28.7890399999999999636202119290828704833984375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 7, 2026 11:13 UTC 57/100 ▼
Vessel A: IMO 8883290 (ARVES OIL) CAMEROON
Vessel B: IMO 9187837 (MONA) Panama
  • Minimum Distance: 393 meters
  • Average Distance: 424 meters
  • Duration: 36 minutes
  • Period: 2026-07-07T11:13:38+00:00 to 2026-07-07T11:49:38+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 57/100

Low-confidence STS candidate - may warrant review. Two tankers (ARVES OIL and MONA) maintained close proximity (min 393m, avg 424m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 393m, avg 424m
Duration5/25Duration 36 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency12/15Distance variance ±46m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-07T13:00:01.888750+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 613911403,
        "imo": 8883290,
        "name": "ARVES OIL",
        "flag": "CAMEROON"
    },
    "vessel_b": {
        "mmsi": 352004984,
        "imo": 9187837,
        "name": "MONA",
        "flag": "Panama"
    },
    "min_distance_m": 393,
    "avg_distance_m": 423.5,
    "distance_consistency_m": 46,
    "duration_minutes": 36,
    "overlap_duration_s": 2160,
    "speed_a_avg": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.179999999999999993338661852249060757458209991455078125,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1499999999999999944488848768742172978818416595458984375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.179999999999999993338661852249060757458209991455078125,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-07T11:13:38+00:00",
        "end": "2026-07-07T11:49:38+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 57,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 393m, avg 424m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 36 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 12,
                "max": 15,
                "detail": "Distance variance \u00b146m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Low-confidence STS candidate - may warrant review. Two tankers (ARVES OIL and MONA) maintained close proximity (min 393m, avg 424m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.9579006000000021003870642744004726409912109375,
            "lon": 28.787345200000000744466888136230409145355224609375
        },
        "time_window": {
            "start_ts": "2026-07-07T11:13:38+00:00",
            "end_ts": "2026-07-07T11:49:38+00:00"
        },
        "searched_at": "2026-07-07T13:00:01.888750+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 7, 2026 11:13 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 5h 36m
  • Data Points: 25 AIS positions
  • Period: 2026-07-07T11:13:38+00:00 to 2026-07-07T16:49:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 336.1000000000000227373675443232059478759765625,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-07-07T11:13:38+00:00",
        "lat": 40.95982169999999911169652477838099002838134765625,
        "lon": 28.788308300000000627960616839118301868438720703125
    },
    "last_point": {
        "ts": "2026-07-07T16:49:41+00:00",
        "lat": 40.959243299999997134364093653857707977294921875,
        "lon": 28.787929999999999353121893364004790782928466796875
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 7, 2026 11:13 UTC 75.0% ▼
  • Duration: 5h 36m
  • Radius: 108 meters
  • Data Points: 25 AIS positions
  • Centroid: 40.9590, 28.7884
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 107.7999999999999971578290569595992565155029296875,
    "duration_minutes": 336.1000000000000227373675443232059478759765625,
    "points": 25,
    "centroid": {
        "lat": 40.95895126799999985678368830122053623199462890625,
        "lon": 28.78838493599999281968848663382232189178466796875
    },
    "bbox": {
        "min_lat": 40.95847499999999996589394868351519107818603515625,
        "min_lon": 28.787929999999999353121893364004790782928466796875,
        "max_lat": 40.95992170000000243135218624956905841827392578125,
        "max_lon": 28.7890399999999999636202119290828704833984375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 7, 2026 10:04 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 5h 54m
  • Data Points: 26 AIS positions
  • Period: 2026-07-07T10:55:38+00:00 to 2026-07-07T16:49:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 354.1000000000000227373675443232059478759765625,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-07-07T10:55:38+00:00",
        "lat": 40.9598849999999998772182152606546878814697265625,
        "lon": 28.78826000000000107093001133762300014495849609375
    },
    "last_point": {
        "ts": "2026-07-07T16:49:41+00:00",
        "lat": 40.959243299999997134364093653857707977294921875,
        "lon": 28.787929999999999353121893364004790782928466796875
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 7, 2026 10:04 UTC 75.0% ▼
  • Duration: 5h 54m
  • Radius: 104 meters
  • Data Points: 26 AIS positions
  • Centroid: 40.9590, 28.7884
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 103.7999999999999971578290569595992565155029296875,
    "duration_minutes": 354.1000000000000227373675443232059478759765625,
    "points": 26,
    "centroid": {
        "lat": 40.9589871807692276206580572761595249176025390625,
        "lon": 28.7883801307692266391313751228153705596923828125
    },
    "bbox": {
        "min_lat": 40.95847499999999996589394868351519107818603515625,
        "min_lon": 28.787929999999999353121893364004790782928466796875,
        "max_lat": 40.95992170000000243135218624956905841827392578125,
        "max_lon": 28.7890399999999999636202119290828704833984375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 7, 2026 09:31 UTC 55/100 ▼
Vessel A: IMO 8883290 (ARVES OIL) CAMEROON
Vessel B: IMO 9187837 (MONA) Panama
  • Minimum Distance: 429 meters
  • Average Distance: 438 meters
  • Duration: 33 minutes
  • Period: 2026-07-07T09:31:37+00:00 to 2026-07-07T10:04:38+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 55/100

Low-confidence STS candidate - may warrant review. Two tankers (ARVES OIL and MONA) maintained close proximity (min 429m, avg 438m) for 33 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 429m, avg 438m
Duration5/25Duration 33 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±13m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-07T11:15:14.864597+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 613911403,
        "imo": 8883290,
        "name": "ARVES OIL",
        "flag": "CAMEROON"
    },
    "vessel_b": {
        "mmsi": 352004984,
        "imo": 9187837,
        "name": "MONA",
        "flag": "Panama"
    },
    "min_distance_m": 429,
    "avg_distance_m": 438,
    "distance_consistency_m": 12.800000000000000710542735760100185871124267578125,
    "duration_minutes": 33,
    "overlap_duration_s": 1981,
    "speed_a_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.14000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_std": 0.14000000000000001332267629550187848508358001708984375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-07T09:31:37+00:00",
        "end": "2026-07-07T10:04:38+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 55,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 429m, avg 438m"
            },
            "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 \u00b113m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Low-confidence STS candidate - may warrant review. Two tankers (ARVES OIL and MONA) maintained close proximity (min 429m, avg 438m) for 33 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.958248400000002220622263848781585693359375,
            "lon": 28.78758129999999937354004941880702972412109375
        },
        "time_window": {
            "start_ts": "2026-07-07T09:31:37+00:00",
            "end_ts": "2026-07-07T10:04:38+00:00"
        },
        "searched_at": "2026-07-07T11:15:14.864597+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 7, 2026 09:31 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 5h 54m
  • Data Points: 26 AIS positions
  • Period: 2026-07-07T09:31:37+00:00 to 2026-07-07T15:25:40+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 354.1000000000000227373675443232059478759765625,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-07-07T09:31:37+00:00",
        "lat": 40.96005670000000264963091467507183551788330078125,
        "lon": 28.7886349999999993087840266525745391845703125
    },
    "last_point": {
        "ts": "2026-07-07T15:25:40+00:00",
        "lat": 40.95875670000000212667146115563809871673583984375,
        "lon": 28.788426699999998703560777357779443264007568359375
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 7, 2026 09:31 UTC 75.0% ▼
  • Duration: 5h 54m
  • Radius: 113 meters
  • Data Points: 26 AIS positions
  • Centroid: 40.9590, 28.7884
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 113.400000000000005684341886080801486968994140625,
    "duration_minutes": 354.1000000000000227373675443232059478759765625,
    "points": 26,
    "centroid": {
        "lat": 40.95904686538461447753434185869991779327392578125,
        "lon": 28.788433207692303739122507977299392223358154296875
    },
    "bbox": {
        "min_lat": 40.95847499999999996589394868351519107818603515625,
        "min_lon": 28.788154999999999716919774073176085948944091796875,
        "max_lat": 40.96005670000000264963091467507183551788330078125,
        "max_lon": 28.7890399999999999636202119290828704833984375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 7, 2026 08:13 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 33m
  • Data Points: 27 AIS positions
  • Period: 2026-07-07T08:25:36+00:00 to 2026-07-07T14:58:40+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 393.1000000000000227373675443232059478759765625,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-07-07T08:25:36+00:00",
        "lat": 40.95994830000000064273990574292838573455810546875,
        "lon": 28.788423300000001603393684490583837032318115234375
    },
    "last_point": {
        "ts": "2026-07-07T14:58:40+00:00",
        "lat": 40.95886329999999730944182374514639377593994140625,
        "lon": 28.78829830000000100653778645209968090057373046875
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 7, 2026 08:13 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 106 meters
  • Data Points: 27 AIS positions
  • Centroid: 40.9591, 28.7884
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 105.599999999999994315658113919198513031005859375,
    "duration_minutes": 393.1000000000000227373675443232059478759765625,
    "points": 27,
    "centroid": {
        "lat": 40.9591192629629716748240753076970577239990234375,
        "lon": 28.788423888888889479176214081235229969024658203125
    },
    "bbox": {
        "min_lat": 40.95847499999999996589394868351519107818603515625,
        "min_lon": 28.788154999999999716919774073176085948944091796875,
        "max_lat": 40.96005670000000264963091467507183551788330078125,
        "max_lon": 28.7890399999999999636202119290828704833984375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 7, 2026 07:39 UTC 55/100 ▼
Vessel A: IMO 9187837 (MONA) Panama
Vessel B: IMO 8883290 (ARVES OIL) CAMEROON
  • Minimum Distance: 445 meters
  • Average Distance: 457 meters
  • Duration: 36 minutes
  • Period: 2026-07-07T07:39:08+00:00 to 2026-07-07T08:15:07+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.4 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 55/100

Low-confidence STS candidate - may warrant review. Two tankers (MONA and ARVES OIL) maintained close proximity (min 445m, avg 457m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 445m, avg 457m
Duration5/25Duration 36 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±13m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-07T08:45:13.007310+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352004984,
        "imo": 9187837,
        "name": "MONA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 613911403,
        "imo": 8883290,
        "name": "ARVES OIL",
        "flag": "CAMEROON"
    },
    "min_distance_m": 444.6000000000000227373675443232059478759765625,
    "avg_distance_m": 457.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 12.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 36,
    "overlap_duration_s": 2159,
    "speed_a_avg": 0.13000000000000000444089209850062616169452667236328125,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.36999999999999999555910790149937383830547332763671875,
    "speed_b_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.13000000000000000444089209850062616169452667236328125,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.36999999999999999555910790149937383830547332763671875,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-07-07T07:39:08+00:00",
        "end": "2026-07-07T08:15:07+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 55,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 445m, avg 457m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 36 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b113m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Low-confidence STS candidate - may warrant review. Two tankers (MONA and ARVES OIL) maintained close proximity (min 445m, avg 457m) for 36 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.95786970000000337677192874252796173095703125,
            "lon": 28.786789399999999972123987390659749507904052734375
        },
        "time_window": {
            "start_ts": "2026-07-07T07:39:08+00:00",
            "end_ts": "2026-07-07T08:15:07+00:00"
        },
        "searched_at": "2026-07-07T08:45:13.007310+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 7, 2026 07:07 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 30m
  • Data Points: 24 AIS positions
  • Period: 2026-07-07T07:52:36+00:00 to 2026-07-07T14:22:40+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 390.1000000000000227373675443232059478759765625,
    "points_in_zone": 24,
    "first_point": {
        "ts": "2026-07-07T07:52:36+00:00",
        "lat": 40.95972330000000027894202503375709056854248046875,
        "lon": 28.788166700000001441139829694293439388275146484375
    },
    "last_point": {
        "ts": "2026-07-07T14:22:40+00:00",
        "lat": 40.95866170000000039408405427820980548858642578125,
        "lon": 28.78857670000000013033059076406061649322509765625
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 7, 2026 07:07 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 95 meters
  • Data Points: 24 AIS positions
  • Centroid: 40.9592, 28.7884
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 94.900000000000005684341886080801486968994140625,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "points": 24,
    "centroid": {
        "lat": 40.95923090833333191085330327041447162628173828125,
        "lon": 28.788426391666671833036161842755973339080810546875
    },
    "bbox": {
        "min_lat": 40.95847499999999996589394868351519107818603515625,
        "min_lon": 28.7881382999999999583451426587998867034912109375,
        "max_lat": 40.96005670000000264963091467507183551788330078125,
        "max_lon": 28.7890399999999999636202119290828704833984375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 7, 2026 06:40 UTC 80.0% ▼
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 33m
  • Data Points: 24 AIS positions
  • Period: 2026-07-07T06:52:35+00:00 to 2026-07-07T13:25:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 393.1000000000000227373675443232059478759765625,
    "points_in_zone": 24,
    "first_point": {
        "ts": "2026-07-07T06:52:35+00:00",
        "lat": 40.959558299999997643681126646697521209716796875,
        "lon": 28.788213299999998895373209961690008640289306640625
    },
    "last_point": {
        "ts": "2026-07-07T13:25:39+00:00",
        "lat": 40.95882329999999882375050219707190990447998046875,
        "lon": 28.788264999999999105284587130881845951080322265625
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 7, 2026 06:40 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 111 meters
  • Data Points: 24 AIS positions
  • Centroid: 40.9594, 28.7884
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 111.2999999999999971578290569595992565155029296875,
    "duration_minutes": 393.1000000000000227373675443232059478759765625,
    "points": 24,
    "centroid": {
        "lat": 40.959376670833336220312048681080341339111328125,
        "lon": 28.788376595833330640061831218190491199493408203125
    },
    "bbox": {
        "min_lat": 40.95847499999999996589394868351519107818603515625,
        "min_lon": 28.788025000000001085709300241433084011077880859375,
        "max_lat": 40.96005670000000264963091467507183551788330078125,
        "max_lon": 28.7890399999999999636202119290828704833984375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Jul 18 16:45 37.3874 24.2949 7.2 kn 204.4° Southern Black Sea Sanctioned Vessel Zone
Jul 18 16:32 37.4122 24.3088 7.3 kn 204.2° Southern Black Sea Sanctioned Vessel Zone
Jul 18 16:28 37.4190 24.3125 7.2 kn 203.7° Southern Black Sea Sanctioned Vessel Zone
Jul 18 16:03 37.4641 24.3374 7.0 kn 213.6° Southern Black Sea Sanctioned Vessel Zone
Jul 18 16:00 37.4690 24.3414 7.1 kn 211.6° Southern Black Sea Sanctioned Vessel Zone
Jul 18 15:58 37.4727 24.3443 7.2 kn 212.7° North Sea Monitoring Zone
Jul 18 15:56 37.4766 24.3475 7.2 kn 212.6° North Sea Monitoring Zone
Jul 18 15:42 37.5001 24.3665 7.3 kn 212.1° North Sea Monitoring Zone
Jul 18 15:06 37.5647 24.4074 7.1 kn 205.5° North Sea Monitoring Zone
Jul 18 15:02 37.5715 24.4115 7.1 kn 205.4° North Sea Monitoring Zone
Jul 18 14:49 37.5953 24.4252 7.0 kn 203.7° North Sea Monitoring Zone
Jul 18 14:44 37.6033 24.4296 6.9 kn 202.6° North Sea Monitoring Zone
Jul 18 13:35 37.7215 24.4916 6.5 kn 208.8° North Sea Monitoring Zone
Jul 12 23:02 40.6492 27.9796 1.0 kn 263.2° Central Baltic Monitoring Zone
Jul 12 20:37 40.6554 28.0362 1.7 kn 272.6° Central Baltic Monitoring Zone
Jul 12 20:32 40.6552 28.0391 1.7 kn 277.4° Central Baltic Monitoring Zone
Jul 12 20:22 40.6545 28.0454 1.7 kn 279.9° Central Baltic Monitoring Zone
Jul 12 20:16 40.6539 28.0491 1.7 kn 283.3° Central Baltic Monitoring Zone
Jul 12 20:13 40.6537 28.0509 1.9 kn 277.1° Central Baltic Monitoring Zone
Jul 12 20:10 40.6535 28.0531 1.7 kn 286.0° Central Baltic Monitoring 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.