DENEB

IMO 9301524

Vessel information

Vessel Name DENEB View name history 📜
IMO Number 9301524
MMSI 667002369
Vessel Type Oil Tanker
Flag 🇸🇱 Sierra leone View flag history 📜
Call Sign 9LS2072
Gross Tonnage 81,380 GT
Year Built 2006

Sanctioned by

🇪🇺 EU 2025-07-18🇬🇧 UK 2025-05-09🇨🇦 CA 2025-06-13🇦🇺 AU 2025-09-18🇳🇿 NZ 2025-10-30

Company & Ownership

🏢
Insist Line Ltd
IMO Company: 6508393
Address Suite 10, 3rd Floor, La Ciotat, Mont Fleuri, Mahe Island Seychelles.
Status Active
Fleet 1.0 owner, 1.0 operator, 1.0 manager, 0.0 beneficial

Management & Operations

ISM Manager
GLOBAL SHIP SOLUTIONS LLC
Apartment 65, Building 7A, Baku Street AZ 5000, Sumqayit Azerbaijan.
Commercial Manager
INSIST LINE LTD
Suite 10, 3rd Floor, La Ciotat, Mont Fleuri, Mahe Island Seychelles.
Registered Owner
INSIST LINE LTD
Suite 10, 3rd Floor, La Ciotat, Mont Fleuri, Mahe Island Seychelles.

Classification & Safety

Current Classification
Russian Maritime Register of Shipping Delivered

Port State Control (PSC) Inspections

⚠️
Risk Level
LOW
Last 36 Months
4
Inspections
Last Inspection
📍 Rizhao
📅 2025-12-22

Survey Renewal & Certificates

Code Type Issuer Issued Expires
510 Safety Management Certificate Vietnam Register (213) 21/07/2022 02/03/2027
533 Maritime Labour Certificate Vietnam Register (213) 21/07/2022 02/03/2027

Programs & Notes

EU Russia Sanctions – Shadow Fleet | AU vessel designations (DFAT) | SEMA (Canada) — vessel designations | The Russia (Sanctions) (EU Exit) Regulations 2019

DateOfListing: 2025-07-20 || DateDesignated: 2025-05-09 | Shipping sanctions: (see “Other information”) | Shipping sanctions: a specified ship is prohibited from being provided with access to or having its master or pilot cause it to enter a port in the UK, may have its registration on the UK Ship Register terminated, and a master or pilot of a specified ship may be given a port barring direction, a detention direction, and a port entry direction or a movement direction. | IMO 9301524 (“DENEB”) is involved in activity whose object or effect is to destabilise Ukraine or undermine or threaten the territorial integrity, sovereignty or independence of Ukraine or to obtain a benefit from or support the Government of Russia. Namely, DENEB is involved in carrying oil or oil products that originated in Russia from Russia to a third country.

Vessel Changes

7 changes

AIS Events

50 events detected • 2 zones • Last: Jul 12, 2026

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 16:15 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 1h 15m
  • Data Points: 5 AIS positions
  • Period: 2026-07-12T16:15:13+00:00 to 2026-07-12T17:30:17+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 75.099999999999994315658113919198513031005859375,
    "points_in_zone": 5,
    "first_point": {
        "ts": "2026-07-12T16:15:13+00:00",
        "lat": 31.458398299999998926068656146526336669921875,
        "lon": 32.292315000000002100932761095464229583740234375
    },
    "last_point": {
        "ts": "2026-07-12T17:30:17+00:00",
        "lat": 31.45621330000000170912244357168674468994140625,
        "lon": 32.291505000000000791260390542447566986083984375
    }
}

Methodology: 2026.01.18

Zone Dwell Western Black Sea Surveillance Zone Jul 12, 2026 16:15 UTC 80.0%
  • Zone: Western Black Sea Surveillance Zone
  • Duration: 1h 15m
  • Data Points: 5 AIS positions
  • Period: 2026-07-12T16:15:13+00:00 to 2026-07-12T17:30:17+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_156",
    "zone_name": "Western Black Sea Surveillance Zone",
    "dwell_minutes": 75.099999999999994315658113919198513031005859375,
    "points_in_zone": 5,
    "first_point": {
        "ts": "2026-07-12T16:15:13+00:00",
        "lat": 31.458398299999998926068656146526336669921875,
        "lon": 32.292315000000002100932761095464229583740234375
    },
    "last_point": {
        "ts": "2026-07-12T17:30:17+00:00",
        "lat": 31.45621330000000170912244357168674468994140625,
        "lon": 32.291505000000000791260390542447566986083984375
    }
}

Methodology: 2026.01.18

Zone Dwell Western Black Sea Surveillance Zone Jul 12, 2026 15:18 UTC 80.0%
  • Zone: Western Black Sea Surveillance Zone
  • Duration: 2h 11m
  • Data Points: 8 AIS positions
  • Period: 2026-07-12T15:18:39+00:00 to 2026-07-12T17:30:17+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_156",
    "zone_name": "Western Black Sea Surveillance Zone",
    "dwell_minutes": 131.599999999999994315658113919198513031005859375,
    "points_in_zone": 8,
    "first_point": {
        "ts": "2026-07-12T15:18:39+00:00",
        "lat": 31.46576329999999899200702202506363391876220703125,
        "lon": 32.27021500000000031604940886609256267547607421875
    },
    "last_point": {
        "ts": "2026-07-12T17:30:17+00:00",
        "lat": 31.45621330000000170912244357168674468994140625,
        "lon": 32.291505000000000791260390542447566986083984375
    }
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 15:01 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 2h 28m
  • Data Points: 12 AIS positions
  • Period: 2026-07-12T15:01:58+00:00 to 2026-07-12T17:30:17+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 148.30000000000001136868377216160297393798828125,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-07-12T15:01:58+00:00",
        "lat": 31.495046699999999617602952639572322368621826171875,
        "lon": 32.25069500000000033423930290155112743377685546875
    },
    "last_point": {
        "ts": "2026-07-12T17:30:17+00:00",
        "lat": 31.45621330000000170912244357168674468994140625,
        "lon": 32.291505000000000791260390542447566986083984375
    }
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 14:21 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 3h 9m
  • Data Points: 22 AIS positions
  • Period: 2026-07-12T14:21:07+00:00 to 2026-07-12T17:30:17+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 189.19999999999998863131622783839702606201171875,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-07-12T14:21:07+00:00",
        "lat": 31.520056700000001370653990306891500949859619140625,
        "lon": 32.2470900000000000318323145620524883270263671875
    },
    "last_point": {
        "ts": "2026-07-12T17:30:17+00:00",
        "lat": 31.45621330000000170912244357168674468994140625,
        "lon": 32.291505000000000791260390542447566986083984375
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 13:04 UTC 75.0%
  • Duration: 1h 49m
  • Radius: 982 meters
  • Data Points: 11 AIS positions
  • Centroid: 31.5180, 32.2451
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 982.3999999999999772626324556767940521240234375,
    "duration_minutes": 109.099999999999994315658113919198513031005859375,
    "points": 11,
    "centroid": {
        "lat": 31.518013327272729640071702306158840656280517578125,
        "lon": 32.24511120909090777786332182586193084716796875
    },
    "bbox": {
        "min_lat": 31.50920169999999842502802493982017040252685546875,
        "min_lon": 32.24003669999999743822627351619303226470947265625,
        "max_lat": 31.5210833000000008041752153076231479644775390625,
        "max_lon": 32.2487866999999965855749906040728092193603515625
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 13:04 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 4h 25m
  • Data Points: 23 AIS positions
  • Period: 2026-07-12T13:04:44+00:00 to 2026-07-12T17:30:17+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 265.6000000000000227373675443232059478759765625,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-07-12T13:04:44+00:00",
        "lat": 31.51855330000000066092979977838695049285888671875,
        "lon": 32.2487866999999965855749906040728092193603515625
    },
    "last_point": {
        "ts": "2026-07-12T17:30:17+00:00",
        "lat": 31.45621330000000170912244357168674468994140625,
        "lon": 32.291505000000000791260390542447566986083984375
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 12:05 UTC 75.0%
  • Duration: 2h 47m
  • Radius: 1,009 meters
  • Data Points: 14 AIS positions
  • Centroid: 31.5182, 32.2459
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 1009.299999999999954525264911353588104248046875,
    "duration_minutes": 167.900000000000005684341886080801486968994140625,
    "points": 14,
    "centroid": {
        "lat": 31.51815737142857187791378237307071685791015625,
        "lon": 32.24593499999999579586074105463922023773193359375
    },
    "bbox": {
        "min_lat": 31.50920169999999842502802493982017040252685546875,
        "min_lon": 32.24003669999999743822627351619303226470947265625,
        "max_lat": 31.5210833000000008041752153076231479644775390625,
        "max_lon": 32.248975000000001500666257925331592559814453125
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 12:05 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 5h 24m
  • Data Points: 26 AIS positions
  • Period: 2026-07-12T12:05:51+00:00 to 2026-07-12T17:30:17+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 324.3999999999999772626324556767940521240234375,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-07-12T12:05:51+00:00",
        "lat": 31.518718299999999743477019364945590496063232421875,
        "lon": 32.248975000000001500666257925331592559814453125
    },
    "last_point": {
        "ts": "2026-07-12T17:30:17+00:00",
        "lat": 31.45621330000000170912244357168674468994140625,
        "lon": 32.291505000000000791260390542447566986083984375
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 11:41 UTC 75/100
Vessel A: DENEB (DENEB) SIERRA LEONE
Vessel B: PLUTON (MARATHON) Russia
  • Minimum Distance: 36 meters
  • Average Distance: 41 meters
  • Duration: 37 minutes
  • Period: 2026-07-12T11:41:48+00:00 to 2026-07-12T12:19:39+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (DENEB and MARATHON) maintained close proximity (min 36m, avg 41m) for 38 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 Black Sea Sanctioned Vessel Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 36m, avg 41m
Duration5/25Duration 38 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Black Sea Sanctioned Vessel Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-12T13:15:07.871535+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 667002369,
        "imo": 9301524,
        "name": "DENEB",
        "flag": "SIERRA LEONE"
    },
    "vessel_b": {
        "mmsi": 273271850,
        "imo": 9288746,
        "name": "MARATHON",
        "flag": "Russia"
    },
    "min_distance_m": 35.5,
    "avg_distance_m": 41.10000000000000142108547152020037174224853515625,
    "distance_consistency_m": 3.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 37.89999999999999857891452847979962825775146484375,
    "overlap_duration_s": 2271,
    "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": "2026-07-12T11:41:48+00:00",
        "end": "2026-07-12T12:19:39+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 36m, avg 41m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 38 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: Black Sea Sanctioned Vessel Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (DENEB and MARATHON) maintained close proximity (min 36m, avg 41m) for 38 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 Black Sea Sanctioned Vessel Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 31.51882210000000128502506413497030735015869140625,
            "lon": 32.24920469999999994570316630415618419647216796875
        },
        "time_window": {
            "start_ts": "2026-07-12T11:41:48+00:00",
            "end_ts": "2026-07-12T12:19:39+00:00"
        },
        "searched_at": "2026-07-12T13:15:07.871535+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 11:19 UTC 75.0%
  • Duration: 3h 34m
  • Radius: 1,051 meters
  • Data Points: 20 AIS positions
  • Centroid: 31.5184, 32.2469
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 1050.700000000000045474735088646411895751953125,
    "duration_minutes": 214.19999999999998863131622783839702606201171875,
    "points": 20,
    "centroid": {
        "lat": 31.518356994999994213912941631861031055450439453125,
        "lon": 32.2468861699999962411311571486294269561767578125
    },
    "bbox": {
        "min_lat": 31.50920169999999842502802493982017040252685546875,
        "min_lon": 32.24003669999999743822627351619303226470947265625,
        "max_lat": 31.5210833000000008041752153076231479644775390625,
        "max_lon": 32.24916499999999786041371407918632030487060546875
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 11:19 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 10m
  • Data Points: 32 AIS positions
  • Period: 2026-07-12T11:19:39+00:00 to 2026-07-12T17:30:17+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 370.6000000000000227373675443232059478759765625,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-07-12T11:19:39+00:00",
        "lat": 31.518865000000001685975803411565721035003662109375,
        "lon": 32.24916499999999786041371407918632030487060546875
    },
    "last_point": {
        "ts": "2026-07-12T17:30:17+00:00",
        "lat": 31.45621330000000170912244357168674468994140625,
        "lon": 32.291505000000000791260390542447566986083984375
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 10:01 UTC 75.0%
  • Duration: 4h 52m
  • Radius: 1,083 meters
  • Data Points: 27 AIS positions
  • Centroid: 31.5185, 32.2475
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 1082.799999999999954525264911353588104248046875,
    "duration_minutes": 292.30000000000001136868377216160297393798828125,
    "points": 27,
    "centroid": {
        "lat": 31.5185081481481432774671702645719051361083984375,
        "lon": 32.24748629629629448345440323464572429656982421875
    },
    "bbox": {
        "min_lat": 31.50920169999999842502802493982017040252685546875,
        "min_lon": 32.24003669999999743822627351619303226470947265625,
        "max_lat": 31.5210833000000008041752153076231479644775390625,
        "max_lon": 32.249234999999998763087205588817596435546875
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 10:01 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 25m
  • Data Points: 37 AIS positions
  • Period: 2026-07-12T10:01:28+00:00 to 2026-07-12T16:27:15+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 385.80000000000001136868377216160297393798828125,
    "points_in_zone": 37,
    "first_point": {
        "ts": "2026-07-12T10:01:28+00:00",
        "lat": 31.5188950000000005502442945726215839385986328125,
        "lon": 32.24916830000000089739842223934829235076904296875
    },
    "last_point": {
        "ts": "2026-07-12T16:27:15+00:00",
        "lat": 31.456918300000001664784576860256493091583251953125,
        "lon": 32.29210330000000084282874013297259807586669921875
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 09:41 UTC 75.0%
  • Duration: 5h 12m
  • Radius: 1,086 meters
  • Data Points: 28 AIS positions
  • Centroid: 31.5185, 32.2475
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 1086,
    "duration_minutes": 312.6000000000000227373675443232059478759765625,
    "points": 28,
    "centroid": {
        "lat": 31.518522439285714398238269495777785778045654296875,
        "lon": 32.2475448821428614110118360258638858795166015625
    },
    "bbox": {
        "min_lat": 31.50920169999999842502802493982017040252685546875,
        "min_lon": 32.24003669999999743822627351619303226470947265625,
        "max_lat": 31.5210833000000008041752153076231479644775390625,
        "max_lon": 32.249234999999998763087205588817596435546875
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 09:41 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 34m
  • Data Points: 36 AIS positions
  • Period: 2026-07-12T09:41:10+00:00 to 2026-07-12T16:15:13+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 394.1000000000000227373675443232059478759765625,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-07-12T09:41:10+00:00",
        "lat": 31.51890829999999965593815431930124759674072265625,
        "lon": 32.24912669999999792480593896470963954925537109375
    },
    "last_point": {
        "ts": "2026-07-12T16:15:13+00:00",
        "lat": 31.458398299999998926068656146526336669921875,
        "lon": 32.292315000000002100932761095464229583740234375
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 08:07 UTC 75.0%
  • Duration: 6h 16m
  • Radius: 1,095 meters
  • Data Points: 31 AIS positions
  • Centroid: 31.5186, 32.2477
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 1095.299999999999954525264911353588104248046875,
    "duration_minutes": 376,
    "points": 31,
    "centroid": {
        "lat": 31.51856677419355179381454945541918277740478515625,
        "lon": 32.2477035483870935195227502845227718353271484375
    },
    "bbox": {
        "min_lat": 31.50920169999999842502802493982017040252685546875,
        "min_lon": 32.24003669999999743822627351619303226470947265625,
        "max_lat": 31.5210833000000008041752153076231479644775390625,
        "max_lon": 32.249234999999998763087205588817596435546875
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 08:07 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 34m
  • Data Points: 35 AIS positions
  • Period: 2026-07-12T08:53:49+00:00 to 2026-07-12T15:28:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 394.80000000000001136868377216160297393798828125,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-07-12T08:53:49+00:00",
        "lat": 31.5189850000000006957634468562901020050048828125,
        "lon": 32.2492017000000004145476850681006908416748046875
    },
    "last_point": {
        "ts": "2026-07-12T15:28:39+00:00",
        "lat": 31.4594866999999993595338310115039348602294921875,
        "lon": 32.28381329999999849178493604995310306549072265625
    }
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 02:04 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 27m
  • Data Points: 6 AIS positions
  • Period: 2026-07-12T02:26:48+00:00 to 2026-07-12T08:53:49+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 387,
    "points_in_zone": 6,
    "first_point": {
        "ts": "2026-07-12T02:26:48+00:00",
        "lat": 31.5187083000000001220541889779269695281982421875,
        "lon": 32.2489599999999967394614941440522670745849609375
    },
    "last_point": {
        "ts": "2026-07-12T08:53:49+00:00",
        "lat": 31.5189850000000006957634468562901020050048828125,
        "lon": 32.2492017000000004145476850681006908416748046875
    }
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 01:03 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 1h 25m
  • Data Points: 6 AIS positions
  • Period: 2026-07-12T01:03:28+00:00 to 2026-07-12T02:28:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 85.400000000000005684341886080801486968994140625,
    "points_in_zone": 6,
    "first_point": {
        "ts": "2026-07-12T01:03:28+00:00",
        "lat": 31.518666700000000702175384503789246082305908203125,
        "lon": 32.24886500000000211230144486762583255767822265625
    },
    "last_point": {
        "ts": "2026-07-12T02:28:52+00:00",
        "lat": 31.518716699999998809289536438882350921630859375,
        "lon": 32.2489666999999968766132951714098453521728515625
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 00:02 UTC 75.0%
  • Duration: 2h 26m
  • Radius: 10 meters
  • Data Points: 12 AIS positions
  • Centroid: 31.5187, 32.2490
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 10.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 146.30000000000001136868377216160297393798828125,
    "points": 12,
    "centroid": {
        "lat": 31.518717366666663792784675024449825286865234375,
        "lon": 32.2489532083333330092500546015799045562744140625
    },
    "bbox": {
        "min_lat": 31.518666700000000702175384503789246082305908203125,
        "min_lon": 32.24886500000000211230144486762583255767822265625,
        "max_lat": 31.518771699999998503471942967735230922698974609375,
        "max_lon": 32.2490049999999968122210702858865261077880859375
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 12, 2026 00:02 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 2h 26m
  • Data Points: 12 AIS positions
  • Period: 2026-07-12T00:02:31+00:00 to 2026-07-12T02:28:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 146.30000000000001136868377216160297393798828125,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-07-12T00:02:31+00:00",
        "lat": 31.518771699999998503471942967735230922698974609375,
        "lon": 32.2490049999999968122210702858865261077880859375
    },
    "last_point": {
        "ts": "2026-07-12T02:28:52+00:00",
        "lat": 31.518716699999998809289536438882350921630859375,
        "lon": 32.2489666999999968766132951714098453521728515625
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 23:06 UTC 80/100
Vessel A: PLUTON (MARATHON) Russia
Vessel B: DENEB (DENEB) SIERRA LEONE
  • Minimum Distance: 37 meters
  • Average Distance: 42 meters
  • Duration: 56 minutes
  • Period: 2026-07-11T23:06:06+00:00 to 2026-07-12T00:02:07+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (MARATHON and DENEB) maintained close proximity (min 37m, avg 42m) for 56 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 Black Sea Sanctioned Vessel Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 37m, avg 42m
Duration10/25Duration 56 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Black Sea Sanctioned Vessel Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-12T05:30:01.795211+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273271850,
        "imo": 9288746,
        "name": "MARATHON",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 667002369,
        "imo": 9301524,
        "name": "DENEB",
        "flag": "SIERRA LEONE"
    },
    "min_distance_m": 36.7000000000000028421709430404007434844970703125,
    "avg_distance_m": 42,
    "distance_consistency_m": 4.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 56,
    "overlap_duration_s": 3361,
    "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": "2026-07-11T23:06:06+00:00",
        "end": "2026-07-12T00:02:07+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 37m, avg 42m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 56 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: Black Sea Sanctioned Vessel Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (MARATHON and DENEB) maintained close proximity (min 37m, avg 42m) for 56 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 Black Sea Sanctioned Vessel Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 31.518918899999999183592080953530967235565185546875,
            "lon": 32.249250299999999924693838693201541900634765625
        },
        "time_window": {
            "start_ts": "2026-07-11T23:06:06+00:00",
            "end_ts": "2026-07-12T00:02:07+00:00"
        },
        "searched_at": "2026-07-12T05:30:01.795211+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 23:01 UTC 75.0%
  • Duration: 3h 27m
  • Radius: 17 meters
  • Data Points: 22 AIS positions
  • Centroid: 31.5188, 32.2490
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 16.699999999999999289457264239899814128875732421875,
    "duration_minutes": 207.69999999999998863131622783839702606201171875,
    "points": 22,
    "centroid": {
        "lat": 31.5187631818181870357875595800578594207763671875,
        "lon": 32.24900061363636183386915945447981357574462890625
    },
    "bbox": {
        "min_lat": 31.518666700000000702175384503789246082305908203125,
        "min_lon": 32.24886500000000211230144486762583255767822265625,
        "max_lat": 31.51886329999999958317857817746698856353759765625,
        "max_lon": 32.24911670000000185609678737819194793701171875
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 23:01 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 3h 27m
  • Data Points: 22 AIS positions
  • Period: 2026-07-11T23:01:09+00:00 to 2026-07-12T02:28:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 207.69999999999998863131622783839702606201171875,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-07-11T23:01:09+00:00",
        "lat": 31.518821700000000163299773703329265117645263671875,
        "lon": 32.2490767000000033704054658301174640655517578125
    },
    "last_point": {
        "ts": "2026-07-12T02:28:52+00:00",
        "lat": 31.518716699999998809289536438882350921630859375,
        "lon": 32.2489666999999968766132951714098453521728515625
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 22:09 UTC 75.0%
  • Duration: 4h 19m
  • Radius: 18 meters
  • Data Points: 34 AIS positions
  • Centroid: 31.5188, 32.2490
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 17.699999999999999289457264239899814128875732421875,
    "duration_minutes": 259.3999999999999772626324556767940521240234375,
    "points": 34,
    "centroid": {
        "lat": 31.518772841176467380819303798489272594451904296875,
        "lon": 32.24900457058823377565204282291233539581298828125
    },
    "bbox": {
        "min_lat": 31.518666700000000702175384503789246082305908203125,
        "min_lon": 32.24886500000000211230144486762583255767822265625,
        "max_lat": 31.51886329999999958317857817746698856353759765625,
        "max_lon": 32.24911670000000185609678737819194793701171875
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 22:09 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 4h 19m
  • Data Points: 34 AIS positions
  • Period: 2026-07-11T22:09:31+00:00 to 2026-07-12T02:28:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 259.3999999999999772626324556767940521240234375,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-07-11T22:09:31+00:00",
        "lat": 31.518703299999998534985934384167194366455078125,
        "lon": 32.2489149999999966667019180022180080413818359375
    },
    "last_point": {
        "ts": "2026-07-12T02:28:52+00:00",
        "lat": 31.518716699999998809289536438882350921630859375,
        "lon": 32.2489666999999968766132951714098453521728515625
    }
}

Methodology: 2026.01.18

Sts Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 22:09 UTC 90/100
Vessel A: PLUTON (MARATHON) Russia
Vessel B: DENEB (DENEB) SIERRA LEONE
  • Minimum Distance: 34 meters
  • Average Distance: 39 meters
  • Duration: 1h 53m
  • Period: 2026-07-11T22:08:19+00:00 to 2026-07-12T00:02:07+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (MARATHON and DENEB) maintained close proximity (min 34m, avg 39m) for 114 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 Black Sea Sanctioned Vessel Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 34m, avg 39m
Duration20/25Duration 114 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273271850,
        "imo": 9288746,
        "name": "MARATHON",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 667002369,
        "imo": 9301524,
        "name": "DENEB",
        "flag": "SIERRA LEONE"
    },
    "min_distance_m": 33.60000000000000142108547152020037174224853515625,
    "avg_distance_m": 39.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 3.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 113.7999999999999971578290569595992565155029296875,
    "overlap_duration_s": 6828,
    "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": "2026-07-11T22:08:19+00:00",
        "end": "2026-07-12T00:02:07+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 34m, avg 39m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 114 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: Black Sea Sanctioned Vessel Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (MARATHON and DENEB) maintained close proximity (min 34m, avg 39m) for 114 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 Black Sea Sanctioned Vessel Monitoring Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 21:03 UTC 75.0%
  • Duration: 5h 25m
  • Radius: 21 meters
  • Data Points: 40 AIS positions
  • Centroid: 31.5188, 32.2490
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 21.300000000000000710542735760100185871124267578125,
    "duration_minutes": 325,
    "points": 40,
    "centroid": {
        "lat": 31.51875295749999850158928893506526947021484375,
        "lon": 32.24897705500000455458575743250548839569091796875
    },
    "bbox": {
        "min_lat": 31.5186182999999999765350366942584514617919921875,
        "min_lon": 32.248791699999998172643245197832584381103515625,
        "max_lat": 31.51886329999999958317857817746698856353759765625,
        "max_lon": 32.24911670000000185609678737819194793701171875
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 21:03 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 5h 25m
  • Data Points: 40 AIS positions
  • Period: 2026-07-11T21:03:50+00:00 to 2026-07-12T02:28:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 325,
    "points_in_zone": 40,
    "first_point": {
        "ts": "2026-07-11T21:03:50+00:00",
        "lat": 31.51864499999999935653249849565327167510986328125,
        "lon": 32.248791699999998172643245197832584381103515625
    },
    "last_point": {
        "ts": "2026-07-12T02:28:52+00:00",
        "lat": 31.518716699999998809289536438882350921630859375,
        "lon": 32.2489666999999968766132951714098453521728515625
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 20:01 UTC 75.0%
  • Duration: 6h 27m
  • Radius: 42 meters
  • Data Points: 45 AIS positions
  • Centroid: 31.5187, 32.2489
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 41.7999999999999971578290569595992565155029296875,
    "duration_minutes": 387.19999999999998863131622783839702606201171875,
    "points": 45,
    "centroid": {
        "lat": 31.518728553333328790131417918018996715545654296875,
        "lon": 32.2489494533333385106743662618100643157958984375
    },
    "bbox": {
        "min_lat": 31.518453300000000893987817107699811458587646484375,
        "min_lon": 32.2486482999999992671291693113744258880615234375,
        "max_lat": 31.51886329999999958317857817746698856353759765625,
        "max_lon": 32.24911670000000185609678737819194793701171875
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 20:01 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 27m
  • Data Points: 45 AIS positions
  • Period: 2026-07-11T20:01:41+00:00 to 2026-07-12T02:28:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 387.19999999999998863131622783839702606201171875,
    "points_in_zone": 45,
    "first_point": {
        "ts": "2026-07-11T20:01:41+00:00",
        "lat": 31.518453300000000893987817107699811458587646484375,
        "lon": 32.2486482999999992671291693113744258880615234375
    },
    "last_point": {
        "ts": "2026-07-12T02:28:52+00:00",
        "lat": 31.518716699999998809289536438882350921630859375,
        "lon": 32.2489666999999968766132951714098453521728515625
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 19:08 UTC 75.0%
  • Duration: 6h 36m
  • Radius: 39 meters
  • Data Points: 48 AIS positions
  • Centroid: 31.5187, 32.2489
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 39.2999999999999971578290569595992565155029296875,
    "duration_minutes": 396.8999999999999772626324556767940521240234375,
    "points": 48,
    "centroid": {
        "lat": 31.5187127749999973502781358547508716583251953125,
        "lon": 32.24892993958332709780734148807823657989501953125
    },
    "bbox": {
        "min_lat": 31.518453300000000893987817107699811458587646484375,
        "min_lon": 32.24862329999999843721525394357740879058837890625,
        "max_lat": 31.51886329999999958317857817746698856353759765625,
        "max_lon": 32.24911670000000185609678737819194793701171875
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 19:08 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 36m
  • Data Points: 48 AIS positions
  • Period: 2026-07-11T19:51:58+00:00 to 2026-07-12T02:28:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 396.8999999999999772626324556767940521240234375,
    "points_in_zone": 48,
    "first_point": {
        "ts": "2026-07-11T19:51:58+00:00",
        "lat": 31.5184832999999997582563082687556743621826171875,
        "lon": 32.24862329999999843721525394357740879058837890625
    },
    "last_point": {
        "ts": "2026-07-12T02:28:52+00:00",
        "lat": 31.518716699999998809289536438882350921630859375,
        "lon": 32.2489666999999968766132951714098453521728515625
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 18:08 UTC 75.0%
  • Duration: 6h 27m
  • Radius: 51 meters
  • Data Points: 54 AIS positions
  • Centroid: 31.5187, 32.2488
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 50.7999999999999971578290569595992565155029296875,
    "duration_minutes": 387.30000000000001136868377216160297393798828125,
    "points": 54,
    "centroid": {
        "lat": 31.518650488888876992632503970526158809661865234375,
        "lon": 32.24884472777777233432061620987951755523681640625
    },
    "bbox": {
        "min_lat": 31.5183482999999995399775798432528972625732421875,
        "min_lon": 32.24844329999999814617694937624037265777587890625,
        "max_lat": 31.51886329999999958317857817746698856353759765625,
        "max_lon": 32.24911670000000185609678737819194793701171875
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 18:08 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 27m
  • Data Points: 54 AIS positions
  • Period: 2026-07-11T18:36:10+00:00 to 2026-07-12T01:03:28+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 387.30000000000001136868377216160297393798828125,
    "points_in_zone": 54,
    "first_point": {
        "ts": "2026-07-11T18:36:10+00:00",
        "lat": 31.5184117000000014741090126335620880126953125,
        "lon": 32.24854169999999697893144912086427211761474609375
    },
    "last_point": {
        "ts": "2026-07-12T01:03:28+00:00",
        "lat": 31.518666700000000702175384503789246082305908203125,
        "lon": 32.24886500000000211230144486762583255767822265625
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 17:06 UTC 75.0%
  • Duration: 6h 34m
  • Radius: 47 meters
  • Data Points: 60 AIS positions
  • Centroid: 31.5186, 32.2488
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 46.60000000000000142108547152020037174224853515625,
    "duration_minutes": 394.80000000000001136868377216160297393798828125,
    "points": 60,
    "centroid": {
        "lat": 31.518621911666652835037893964909017086029052734375,
        "lon": 32.24881625499998705208781757391989231109619140625
    },
    "bbox": {
        "min_lat": 31.5183482999999995399775798432528972625732421875,
        "min_lon": 32.24844329999999814617694937624037265777587890625,
        "max_lat": 31.51886329999999958317857817746698856353759765625,
        "max_lon": 32.24911670000000185609678737819194793701171875
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 17:06 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 34m
  • Data Points: 60 AIS positions
  • Period: 2026-07-11T17:43:09+00:00 to 2026-07-12T00:17:58+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 394.80000000000001136868377216160297393798828125,
    "points_in_zone": 60,
    "first_point": {
        "ts": "2026-07-11T17:43:09+00:00",
        "lat": 31.51853330000000141808413900434970855712890625,
        "lon": 32.24880499999999727833710494451224803924560546875
    },
    "last_point": {
        "ts": "2026-07-12T00:17:58+00:00",
        "lat": 31.51874169999999963920345180667936801910400390625,
        "lon": 32.248971699999998463681549765169620513916015625
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 16:03 UTC 75.0%
  • Duration: 6h 33m
  • Radius: 48 meters
  • Data Points: 64 AIS positions
  • Centroid: 31.5186, 32.2488
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 47.89999999999999857891452847979962825775146484375,
    "duration_minutes": 393,
    "points": 64,
    "centroid": {
        "lat": 31.5185618968749992063749232329428195953369140625,
        "lon": 32.24875047187500598511178395710885524749755859375
    },
    "bbox": {
        "min_lat": 31.518325000000000812860889709554612636566162109375,
        "min_lon": 32.24840499999999821056917426176369190216064453125,
        "max_lat": 31.51886329999999958317857817746698856353759765625,
        "max_lon": 32.24911670000000185609678737819194793701171875
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 16:03 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 33m
  • Data Points: 64 AIS positions
  • Period: 2026-07-11T16:40:10+00:00 to 2026-07-11T23:13:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 64,
    "first_point": {
        "ts": "2026-07-11T16:40:10+00:00",
        "lat": 31.51832830000000029713191906921565532684326171875,
        "lon": 32.24840499999999821056917426176369190216064453125
    },
    "last_point": {
        "ts": "2026-07-11T23:13:10+00:00",
        "lat": 31.51886329999999958317857817746698856353759765625,
        "lon": 32.24908669999999943911461741663515567779541015625
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 15:02 UTC 75.0%
  • Duration: 6h 32m
  • Radius: 46 meters
  • Data Points: 62 AIS positions
  • Centroid: 31.5185, 32.2486
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 45.60000000000000142108547152020037174224853515625,
    "duration_minutes": 392.80000000000001136868377216160297393798828125,
    "points": 62,
    "centroid": {
        "lat": 31.518486072580646606411391985602676868438720703125,
        "lon": 32.2486466403225762178408331237733364105224609375
    },
    "bbox": {
        "min_lat": 31.518281699999999290184860001318156719207763671875,
        "min_lon": 32.2482432999999986122929840348660945892333984375,
        "max_lat": 31.518771699999998503471942967735230922698974609375,
        "max_lon": 32.2490049999999968122210702858865261077880859375
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 15:02 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 32m
  • Data Points: 62 AIS positions
  • Period: 2026-07-11T15:54:39+00:00 to 2026-07-11T22:27:28+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 392.80000000000001136868377216160297393798828125,
    "points_in_zone": 62,
    "first_point": {
        "ts": "2026-07-11T15:54:39+00:00",
        "lat": 31.518325000000000812860889709554612636566162109375,
        "lon": 32.2482432999999986122929840348660945892333984375
    },
    "last_point": {
        "ts": "2026-07-11T22:27:28+00:00",
        "lat": 31.5187600000000003319655661471188068389892578125,
        "lon": 32.2490049999999968122210702858865261077880859375
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 14:01 UTC 75.0%
  • Duration: 6h 33m
  • Radius: 37 meters
  • Data Points: 69 AIS positions
  • Centroid: 31.5184, 32.2485
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 37,
    "duration_minutes": 393.6000000000000227373675443232059478759765625,
    "points": 69,
    "centroid": {
        "lat": 31.51840835362319381829365738667547702789306640625,
        "lon": 32.24851772608695910093956626951694488525390625
    },
    "bbox": {
        "min_lat": 31.518261700000000047339199227280914783477783203125,
        "min_lon": 32.2482432999999986122929840348660945892333984375,
        "max_lat": 31.51864499999999935653249849565327167510986328125,
        "max_lon": 32.24880830000000031532181310467422008514404296875
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 14:01 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 33m
  • Data Points: 69 AIS positions
  • Period: 2026-07-11T14:30:17+00:00 to 2026-07-11T21:03:50+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 393.6000000000000227373675443232059478759765625,
    "points_in_zone": 69,
    "first_point": {
        "ts": "2026-07-11T14:30:17+00:00",
        "lat": 31.51837330000000036989149521104991436004638671875,
        "lon": 32.24835329999999800065779709257185459136962890625
    },
    "last_point": {
        "ts": "2026-07-11T21:03:50+00:00",
        "lat": 31.51864499999999935653249849565327167510986328125,
        "lon": 32.248791699999998172643245197832584381103515625
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 13:05 UTC 75.0%
  • Duration: 6h 39m
  • Radius: 283 meters
  • Data Points: 76 AIS positions
  • Centroid: 31.5185, 32.2485
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 283.1000000000000227373675443232059478759765625,
    "duration_minutes": 399.19999999999998863131622783839702606201171875,
    "points": 76,
    "centroid": {
        "lat": 31.51847517236843287946612690575420856475830078125,
        "lon": 32.24851517105262388440678478218615055084228515625
    },
    "bbox": {
        "min_lat": 31.518261700000000047339199227280914783477783203125,
        "min_lon": 32.24792500000000217141860048286616802215576171875,
        "max_lat": 31.520978299999999450164978043176233768463134765625,
        "max_lon": 32.248930000000001427906681783497333526611328125
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 13:05 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 39m
  • Data Points: 76 AIS positions
  • Period: 2026-07-11T13:40:29+00:00 to 2026-07-11T20:19:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 399.19999999999998863131622783839702606201171875,
    "points_in_zone": 76,
    "first_point": {
        "ts": "2026-07-11T13:40:29+00:00",
        "lat": 31.520978299999999450164978043176233768463134765625,
        "lon": 32.24792500000000217141860048286616802215576171875
    },
    "last_point": {
        "ts": "2026-07-11T20:19:39+00:00",
        "lat": 31.518543300000001039506969391368329524993896484375,
        "lon": 32.2487433000000009997165761888027191162109375
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 13:03 UTC 80/100
Vessel A: PLUTON (MARATHON) Russia
Vessel B: DENEB (DENEB) SIERRA LEONE
  • Minimum Distance: 23 meters
  • Average Distance: 69 meters
  • Duration: 2h 13m
  • Period: 2026-07-11T13:03:03+00:00 to 2026-07-11T15:16:28+00:00
  • Vessel A Avg Speed: 0.8 knots
  • Vessel B Avg Speed: 0.7 knots
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (MARATHON and DENEB) maintained close proximity (min 23m, avg 68m) for 133 minutes. Both vessels were slow-moving (avg speeds 0.8 and 0.7 knots). Moderate distance variation observed during the encounter. Event occurred in Black Sea Sanctioned Vessel Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 23m, avg 68m
Duration25/25Duration 133 minutes
Speed Stability12/20both very slow; somewhat variable speeds
Distance Consistency8/15Distance variance ±57m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Black Sea Sanctioned Vessel Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-11T15:30:04.880080+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273271850,
        "imo": 9288746,
        "name": "MARATHON",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 667002369,
        "imo": 9301524,
        "name": "DENEB",
        "flag": "SIERRA LEONE"
    },
    "min_distance_m": 23.199999999999999289457264239899814128875732421875,
    "avg_distance_m": 68.5,
    "distance_consistency_m": 57,
    "duration_minutes": 133.400000000000005684341886080801486968994140625,
    "overlap_duration_s": 8005,
    "speed_a_avg": 0.810000000000000053290705182007513940334320068359375,
    "speed_a_std": 0.81999999999999995115018691649311222136020660400390625,
    "speed_b_avg": 0.6999999999999999555910790149937383830547332763671875,
    "speed_b_std": 0.770000000000000017763568394002504646778106689453125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.810000000000000053290705182007513940334320068359375,
            "max_sog": 2
        },
        "vessel_b": {
            "avg_sog": 0.6999999999999999555910790149937383830547332763671875,
            "max_sog": 1.899999999999999911182158029987476766109466552734375
        }
    },
    "time_window": {
        "start": "2026-07-11T13:03:03+00:00",
        "end": "2026-07-11T15:16:28+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 23m, avg 68m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 133 minutes"
            },
            "speed_stability": {
                "score": 12,
                "max": 20,
                "detail": "both very slow; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 8,
                "max": 15,
                "detail": "Distance variance \u00b157m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Black Sea Sanctioned Vessel Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (MARATHON and DENEB) maintained close proximity (min 23m, avg 68m) for 133 minutes. Both vessels were slow-moving (avg speeds 0.8 and 0.7 knots). Moderate distance variation observed during the encounter. Event occurred in Black Sea Sanctioned Vessel Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 31.5224098999999995385223883204162120819091796875,
            "lon": 32.24739559999999727324393461458384990692138671875
        },
        "time_window": {
            "start_ts": "2026-07-11T13:03:03+00:00",
            "end_ts": "2026-07-11T15:16:28+00:00"
        },
        "searched_at": "2026-07-11T15:30:04.880080+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Loiter Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 12:54 UTC 75.0%
  • Duration: 6h 30m
  • Radius: 1,648 meters
  • Data Points: 74 AIS positions
  • Centroid: 31.5195, 32.2482
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 1647.59999999999990905052982270717620849609375,
    "duration_minutes": 390.3999999999999772626324556767940521240234375,
    "points": 74,
    "centroid": {
        "lat": 31.519493085135142251829165616072714328765869140625,
        "lon": 32.24822839594593659739985014311969280242919921875
    },
    "bbox": {
        "min_lat": 31.518261700000000047339199227280914783477783203125,
        "min_lon": 32.243466699999999036663211882114410400390625,
        "max_lat": 31.53378169999999869332896196283400058746337890625,
        "max_lon": 32.248930000000001427906681783497333526611328125
    },
    "zone_id": "discovered_025"
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 12:26 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 30m
  • Data Points: 74 AIS positions
  • Period: 2026-07-11T12:54:08+00:00 to 2026-07-11T19:24:30+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 390.3999999999999772626324556767940521240234375,
    "points_in_zone": 74,
    "first_point": {
        "ts": "2026-07-11T12:54:08+00:00",
        "lat": 31.53378169999999869332896196283400058746337890625,
        "lon": 32.243466699999999036663211882114410400390625
    },
    "last_point": {
        "ts": "2026-07-11T19:24:30+00:00",
        "lat": 31.518391699999998678549673059023916721343994140625,
        "lon": 32.24849830000000139307303470559418201446533203125
    }
}

Methodology: 2026.01.18

Zone Dwell Black Sea Sanctioned Vessel Monitoring Zone Jul 11, 2026 11:25 UTC 80.0%
  • Zone: Black Sea Sanctioned Vessel Monitoring Zone
  • Duration: 6h 31m
  • Data Points: 65 AIS positions
  • Period: 2026-07-11T11:25:40+00:00 to 2026-07-11T17:56:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_025",
    "zone_name": "Black Sea Sanctioned Vessel Monitoring Zone",
    "dwell_minutes": 391.30000000000001136868377216160297393798828125,
    "points_in_zone": 65,
    "first_point": {
        "ts": "2026-07-11T11:25:40+00:00",
        "lat": 31.622209999999999041619958006776869297027587890625,
        "lon": 32.19689670000000347727109328843653202056884765625
    },
    "last_point": {
        "ts": "2026-07-11T17:56:59+00:00",
        "lat": 31.518518300000000209593054023571312427520751953125,
        "lon": 32.2487799999999964484231895767152309417724609375
    }
}

Methodology: 2026.01.18

Source snapshot

SanctionerAs ofEntity ID
🇬🇧 UK2025-09-299301524

We mirror official lists; always verify at the source.

Sanctioned on the same day

  • ADHARA · IMO 9353125 🇦🇺 AU🇨🇦 CA🇪🇺 EU🇬🇧 UK
  • AKAR WEST · IMO 9258167 🇦🇺 AU🇨🇦 CA🇪🇺 EU🇳🇿 NZ🇬🇧 UK
  • ATLANTICOS · IMO 9282986 🇦🇺 AU🇨🇦 CA🇪🇺 EU🇳🇿 NZ🇬🇧 UK
  • BELOMOR · IMO 9384435 🇦🇺 AU🇨🇦 CA🇪🇺 EU🇳🇿 NZ🇬🇧 UK
  • Blue · IMO 9236353 🇦🇺 AU🇨🇦 CA🇪🇺 EU🇳🇿 NZ🇬🇧 UK
  • Blue Talu · IMO 9334557 🇦🇺 AU🇨🇦 CA🇪🇺 EU🇬🇧 UK
  • C Viking · IMO 9261657 🇦🇺 AU🇨🇦 CA🇪🇺 EU🇳🇿 NZ🇬🇧 UK
  • CAVELA · IMO 9259733 🇦🇺 AU🇨🇦 CA🇪🇺 EU🇬🇧 UK