TEWEST

IMO 9337327

Vessel information

Vessel Name TEWEST View name history 📜
IMO Number 9337327
MMSI 511101791
Vessel Type Chemical/ Products Tanker| Transporteur de produits chimiques
Flag 🇸🇱 Sierra leone View flag history 📜
Call Sign T8A5279
Gross Tonnage 30,105 GT
Year Built 2006

Sanctioned by

🇬🇧 UK 2025-06-17

Company & Ownership

🏢
West Maritime Services & Trading Inc
IMO Company: 0035133
Address Morton House, PO Box 583, Government Road, Charlestown, Nevis, St Kitts & Nevis.
Status Active
Fleet 2.0 owner, 2.0 operator, 2.0 manager, 0.0 beneficial

Management & Operations

ISM Manager
MODERN GEMI ISLETMECILIGI AS
Daire 55, Kat 15, Beybi Giz Plaza, Maslak Meydan Sokak, Maslak Mah, 1, Sariyer, 34398, Istanbul, Turkey.
Commercial Manager
WEST MARITIME SERVICES TRADING
Morton House, PO Box 583, Government Road, Charlestown, Nevis, St Kitts & Nevis.
Registered Owner
WEST MARITIME SERVICES TRADING
Morton House, PO Box 583, Government Road, Charlestown, Nevis, St Kitts & Nevis.

Classification & Safety

Current Classification
Registro Italiano Navale (IACS) Delivered

Port State Control (PSC) Inspections

⚠️
Risk Level
LOW
Last 36 Months
1
Inspections
Last Inspection
📍 Novorossiisk
📅 2025-10-08

Survey Renewal & Certificates

Code Type Issuer Issued Expires
510 Safety Management Certificate Bureau Veritas (115) 29/08/2023 23/06/2028
509 Document of Compliance ABS 04/06/2023 04/05/2028

Programs & Notes

SEMA (Canada) — vessel designations | The Russia (Sanctions) (EU Exit) Regulations 2019

DateDesignated: 2025-06-17 | 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 9337327 (“JAZZ”) 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, JAZZ is involved in carrying oil or oil products that originated in Russia from Russia to a third country.

Vessel Changes

14 changes

AIS Events

50 events detected • 1 zone • Last: Sep 7, 2026

Loiter Eastern Black Sea Surveillance Zone Sep 7, 2026 18:19 UTC 75.0%
  • Duration: 1h 38m
  • Radius: 38 meters
  • Data Points: 10 AIS positions
  • Centroid: 31.5118, 32.2906
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 38.10000000000000142108547152020037174224853515625,
    "duration_minutes": 98.599999999999994315658113919198513031005859375,
    "points": 10,
    "centroid": {
        "lat": 31.511795499999994518702806090004742145538330078125,
        "lon": 32.2905686600000052521863835863769054412841796875
    },
    "bbox": {
        "min_lat": 31.511633299999999735518940724432468414306640625,
        "min_lon": 32.290338300000001936496119014918804168701171875,
        "max_lat": 31.511945000000000760564944357611238956451416015625,
        "max_lon": 32.290964999999999918145476840436458587646484375
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 7, 2026 18:19 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 1h 38m
  • Data Points: 10 AIS positions
  • Period: 2026-09-07T18:19:48+00:00 to 2026-09-07T19:58:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 98.599999999999994315658113919198513031005859375,
    "points_in_zone": 10,
    "first_point": {
        "ts": "2026-09-07T18:19:48+00:00",
        "lat": 31.511849999999999027977537480182945728302001953125,
        "lon": 32.290964999999999918145476840436458587646484375
    },
    "last_point": {
        "ts": "2026-09-07T19:58:25+00:00",
        "lat": 31.511633299999999735518940724432468414306640625,
        "lon": 32.290338300000001936496119014918804168701171875
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 7, 2026 17:51 UTC 75.0%
  • Duration: 2h 6m
  • Radius: 36 meters
  • Data Points: 13 AIS positions
  • Centroid: 31.5118, 32.2906
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 36,
    "duration_minutes": 126.7999999999999971578290569595992565155029296875,
    "points": 13,
    "centroid": {
        "lat": 31.511820900000000023055690689943730831146240234375,
        "lon": 32.2905874307692357660926063545048236846923828125
    },
    "bbox": {
        "min_lat": 31.511633299999999735518940724432468414306640625,
        "min_lon": 32.290338300000001936496119014918804168701171875,
        "max_lat": 31.511971700000000140562406159006059169769287109375,
        "max_lon": 32.290964999999999918145476840436458587646484375
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 7, 2026 17:51 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 2h 6m
  • Data Points: 13 AIS positions
  • Period: 2026-09-07T17:51:35+00:00 to 2026-09-07T19:58:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 126.7999999999999971578290569595992565155029296875,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-09-07T17:51:35+00:00",
        "lat": 31.511939999999999173496689763851463794708251953125,
        "lon": 32.29068500000000341287886840291321277618408203125
    },
    "last_point": {
        "ts": "2026-09-07T19:58:25+00:00",
        "lat": 31.511633299999999735518940724432468414306640625,
        "lon": 32.290338300000001936496119014918804168701171875
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 7, 2026 16:11 UTC 75.0%
  • Duration: 3h 46m
  • Radius: 60 meters
  • Data Points: 21 AIS positions
  • Centroid: 31.5118, 32.2905
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 59.7000000000000028421709430404007434844970703125,
    "duration_minutes": 226.69999999999998863131622783839702606201171875,
    "points": 21,
    "centroid": {
        "lat": 31.51176459999999934780134935863316059112548828125,
        "lon": 32.2904561047619012015275075100362300872802734375
    },
    "bbox": {
        "min_lat": 31.5114650000000011687006917782127857208251953125,
        "min_lon": 32.289929999999998244675225578248500823974609375,
        "max_lat": 31.511971700000000140562406159006059169769287109375,
        "max_lon": 32.290964999999999918145476840436458587646484375
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 7, 2026 16:11 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 3h 46m
  • Data Points: 21 AIS positions
  • Period: 2026-09-07T16:11:45+00:00 to 2026-09-07T19:58:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 226.69999999999998863131622783839702606201171875,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-09-07T16:11:45+00:00",
        "lat": 31.511469999999999203055267571471631526947021484375,
        "lon": 32.289929999999998244675225578248500823974609375
    },
    "last_point": {
        "ts": "2026-09-07T19:58:25+00:00",
        "lat": 31.511633299999999735518940724432468414306640625,
        "lon": 32.290338300000001936496119014918804168701171875
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 7, 2026 15:04 UTC 75.0%
  • Duration: 4h 53m
  • Radius: 61 meters
  • Data Points: 30 AIS positions
  • Centroid: 31.5118, 32.2905
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 61.39999999999999857891452847979962825775146484375,
    "duration_minutes": 293.6000000000000227373675443232059478759765625,
    "points": 30,
    "centroid": {
        "lat": 31.51176966333333240299907629378139972686767578125,
        "lon": 32.29047405000000736663423595018684864044189453125
    },
    "bbox": {
        "min_lat": 31.5114650000000011687006917782127857208251953125,
        "min_lon": 32.289929999999998244675225578248500823974609375,
        "max_lat": 31.511971700000000140562406159006059169769287109375,
        "max_lon": 32.290964999999999918145476840436458587646484375
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 7, 2026 15:04 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 4h 53m
  • Data Points: 30 AIS positions
  • Period: 2026-09-07T15:04:48+00:00 to 2026-09-07T19:58:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 293.6000000000000227373675443232059478759765625,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-09-07T15:04:48+00:00",
        "lat": 31.511720000000000396767063648439943790435791015625,
        "lon": 32.29050500000000312184056383557617664337158203125
    },
    "last_point": {
        "ts": "2026-09-07T19:58:25+00:00",
        "lat": 31.511633299999999735518940724432468414306640625,
        "lon": 32.290338300000001936496119014918804168701171875
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 7, 2026 14:01 UTC 75.0%
  • Duration: 5h 56m
  • Radius: 60 meters
  • Data Points: 41 AIS positions
  • Centroid: 31.5117, 32.2905
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 59.7000000000000028421709430404007434844970703125,
    "duration_minutes": 356.6000000000000227373675443232059478759765625,
    "points": 41,
    "centroid": {
        "lat": 31.51172740000000516147338203154504299163818359375,
        "lon": 32.2904818243902553831503610126674175262451171875
    },
    "bbox": {
        "min_lat": 31.5114650000000011687006917782127857208251953125,
        "min_lon": 32.289929999999998244675225578248500823974609375,
        "max_lat": 31.511971700000000140562406159006059169769287109375,
        "max_lon": 32.290964999999999918145476840436458587646484375
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 7, 2026 14:01 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 5h 56m
  • Data Points: 41 AIS positions
  • Period: 2026-09-07T14:01:46+00:00 to 2026-09-07T19:58:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 356.6000000000000227373675443232059478759765625,
    "points_in_zone": 41,
    "first_point": {
        "ts": "2026-09-07T14:01:46+00:00",
        "lat": 31.511591700000000315640136250294744968414306640625,
        "lon": 32.29062499999999857891452847979962825775146484375
    },
    "last_point": {
        "ts": "2026-09-07T19:58:25+00:00",
        "lat": 31.511633299999999735518940724432468414306640625,
        "lon": 32.290338300000001936496119014918804168701171875
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Eastern Black Sea Surveillance Zone Sep 7, 2026 13:38 UTC 80/100
Vessel A: FLORA 1 (YENISEI) RUSSIA
Vessel B: TEWEST (TEWEST) SIERRA LEONE
  • Minimum Distance: 28 meters
  • Average Distance: 36 meters
  • Duration: 54 minutes
  • Period: 2026-09-07T13:38:40+00:00 to 2026-09-07T14:33:32+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Black Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (YENISEI and TEWEST) maintained close proximity (min 28m, avg 36m) for 55 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Black Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 28m, avg 36m
Duration10/25Duration 55 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±12m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Black Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-07T16:45:02.164971+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273120320,
        "imo": 9307815,
        "name": "YENISEI",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 667002062,
        "imo": 9337327,
        "name": "TEWEST",
        "flag": "SIERRA LEONE"
    },
    "min_distance_m": 28.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 36.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 11.699999999999999289457264239899814128875732421875,
    "duration_minutes": 54.89999999999999857891452847979962825775146484375,
    "overlap_duration_s": 3292,
    "speed_a_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-09-07T13:38:40+00:00",
        "end": "2026-09-07T14:33:32+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 28m, avg 36m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 55 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b112m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Black Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YENISEI and TEWEST) maintained close proximity (min 28m, avg 36m) for 55 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Black Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 31.511652500000000287627699435688555240631103515625,
            "lon": 32.2907545999999996411133906804025173187255859375
        },
        "time_window": {
            "start_ts": "2026-09-07T13:38:40+00:00",
            "end_ts": "2026-09-07T14:33:32+00:00"
        },
        "searched_at": "2026-09-07T16:45:02.164971+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 7, 2026 13:10 UTC 75.0%
  • Duration: 6h 29m
  • Radius: 60 meters
  • Data Points: 46 AIS positions
  • Centroid: 31.5117, 32.2905
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 59.5,
    "duration_minutes": 389.6000000000000227373675443232059478759765625,
    "points": 46,
    "centroid": {
        "lat": 31.511711884782613424249575473368167877197265625,
        "lon": 32.29048963260870408475966542027890682220458984375
    },
    "bbox": {
        "min_lat": 31.5114650000000011687006917782127857208251953125,
        "min_lon": 32.289929999999998244675225578248500823974609375,
        "max_lat": 31.511971700000000140562406159006059169769287109375,
        "max_lon": 32.290964999999999918145476840436458587646484375
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 7, 2026 13:10 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 6h 29m
  • Data Points: 46 AIS positions
  • Period: 2026-09-07T13:28:48+00:00 to 2026-09-07T19:58:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 389.6000000000000227373675443232059478759765625,
    "points_in_zone": 46,
    "first_point": {
        "ts": "2026-09-07T13:28:48+00:00",
        "lat": 31.511533299999999968576958053745329380035400390625,
        "lon": 32.29049669999999849778760108165442943572998046875
    },
    "last_point": {
        "ts": "2026-09-07T19:58:25+00:00",
        "lat": 31.511633299999999735518940724432468414306640625,
        "lon": 32.290338300000001936496119014918804168701171875
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 7, 2026 08:01 UTC 75.0%
  • Duration: 6h 35m
  • Radius: 48 meters
  • Data Points: 14 AIS positions
  • Centroid: 31.5116, 32.2906
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 48.10000000000000142108547152020037174224853515625,
    "duration_minutes": 395.8999999999999772626324556767940521240234375,
    "points": 14,
    "centroid": {
        "lat": 31.51161632142856916516393539495766162872314453125,
        "lon": 32.2905589214285697607920155860483646392822265625
    },
    "bbox": {
        "min_lat": 31.511533299999999968576958053745329380035400390625,
        "min_lon": 32.29031669999999820674929651431739330291748046875,
        "max_lat": 31.511991699999999383408066933043301105499267578125,
        "max_lon": 32.29081330000000349400579580105841159820556640625
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 7, 2026 08:01 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 6h 35m
  • Data Points: 14 AIS positions
  • Period: 2026-09-07T08:01:51+00:00 to 2026-09-07T14:37:47+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 395.8999999999999772626324556767940521240234375,
    "points_in_zone": 14,
    "first_point": {
        "ts": "2026-09-07T08:01:51+00:00",
        "lat": 31.511991699999999383408066933043301105499267578125,
        "lon": 32.29081330000000349400579580105841159820556640625
    },
    "last_point": {
        "ts": "2026-09-07T14:37:47+00:00",
        "lat": 31.51157500000000055706550483591854572296142578125,
        "lon": 32.29063330000000320296749123372137546539306640625
    }
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 7, 2026 07:20 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 6h 35m
  • Data Points: 8 AIS positions
  • Period: 2026-09-07T07:20:25+00:00 to 2026-09-07T13:55:49+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 395.3999999999999772626324556767940521240234375,
    "points_in_zone": 8,
    "first_point": {
        "ts": "2026-09-07T07:20:25+00:00",
        "lat": 31.5119499999999987949195201508700847625732421875,
        "lon": 32.29073329999999941719579510390758514404296875
    },
    "last_point": {
        "ts": "2026-09-07T13:55:49+00:00",
        "lat": 31.511643299999999356941771111451089382171630859375,
        "lon": 32.29061829999999844176272745244204998016357421875
    }
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 7, 2026 06:02 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 6h 23m
  • Data Points: 4 AIS positions
  • Period: 2026-09-07T06:46:59+00:00 to 2026-09-07T13:10:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 383.8999999999999772626324556767940521240234375,
    "points_in_zone": 4,
    "first_point": {
        "ts": "2026-09-07T06:46:59+00:00",
        "lat": 31.5119949999999988676790962927043437957763671875,
        "lon": 32.2908316999999982499502948485314846038818359375
    },
    "last_point": {
        "ts": "2026-09-07T13:10:52+00:00",
        "lat": 31.5116517000000015968907973729074001312255859375,
        "lon": 32.2903850000000005593392415903508663177490234375
    }
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 7, 2026 03:32 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 4h 29m
  • Data Points: 8 AIS positions
  • Period: 2026-09-07T03:32:02+00:00 to 2026-09-07T08:01:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 269.80000000000001136868377216160297393798828125,
    "points_in_zone": 8,
    "first_point": {
        "ts": "2026-09-07T03:32:02+00:00",
        "lat": 31.51207000000000135742084239609539508819580078125,
        "lon": 32.290874999999999772626324556767940521240234375
    },
    "last_point": {
        "ts": "2026-09-07T08:01:51+00:00",
        "lat": 31.511991699999999383408066933043301105499267578125,
        "lon": 32.29081330000000349400579580105841159820556640625
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 7, 2026 02:11 UTC 75.0%
  • Duration: 5h 50m
  • Radius: 42 meters
  • Data Points: 10 AIS positions
  • Centroid: 31.5121, 32.2909
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 42,
    "duration_minutes": 350.80000000000001136868377216160297393798828125,
    "points": 10,
    "centroid": {
        "lat": 31.51205449999999785859472467564046382904052734375,
        "lon": 32.2909201700000068058216129429638385772705078125
    },
    "bbox": {
        "min_lat": 31.51186500000000023646862246096134185791015625,
        "min_lon": 32.29073329999999941719579510390758514404296875,
        "max_lat": 31.512299999999999755573298898525536060333251953125,
        "max_lon": 32.29126500000000277168510365299880504608154296875
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 7, 2026 02:11 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 5h 50m
  • Data Points: 10 AIS positions
  • Period: 2026-09-07T02:11:01+00:00 to 2026-09-07T08:01:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 350.80000000000001136868377216160297393798828125,
    "points_in_zone": 10,
    "first_point": {
        "ts": "2026-09-07T02:11:01+00:00",
        "lat": 31.512299999999999755573298898525536060333251953125,
        "lon": 32.29125669999999814763214089907705783843994140625
    },
    "last_point": {
        "ts": "2026-09-07T08:01:51+00:00",
        "lat": 31.511991699999999383408066933043301105499267578125,
        "lon": 32.29081330000000349400579580105841159820556640625
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 7, 2026 01:08 UTC 75.0%
  • Duration: 6h 26m
  • Radius: 37 meters
  • Data Points: 12 AIS positions
  • Centroid: 31.5121, 32.2909
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 36.7999999999999971578290569595992565155029296875,
    "duration_minutes": 386.8999999999999772626324556767940521240234375,
    "points": 12,
    "centroid": {
        "lat": 31.5121015250000056084900279529392719268798828125,
        "lon": 32.290945558333334020062466152012348175048828125
    },
    "bbox": {
        "min_lat": 31.51186500000000023646862246096134185791015625,
        "min_lon": 32.29073329999999941719579510390758514404296875,
        "max_lat": 31.512338299999999691181074013002216815948486328125,
        "max_lon": 32.29126500000000277168510365299880504608154296875
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 7, 2026 01:08 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 6h 26m
  • Data Points: 12 AIS positions
  • Period: 2026-09-07T01:35:00+00:00 to 2026-09-07T08:01:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 386.8999999999999772626324556767940521240234375,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-09-07T01:35:00+00:00",
        "lat": 31.512338299999999691181074013002216815948486328125,
        "lon": 32.2910533000000015135810826905071735382080078125
    },
    "last_point": {
        "ts": "2026-09-07T08:01:51+00:00",
        "lat": 31.511991699999999383408066933043301105499267578125,
        "lon": 32.29081330000000349400579580105841159820556640625
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 7, 2026 00:53 UTC 75.0%
  • Duration: 6h 27m
  • Radius: 42 meters
  • Data Points: 17 AIS positions
  • Centroid: 31.5122, 32.2910
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 41.7000000000000028421709430404007434844970703125,
    "duration_minutes": 387.3999999999999772626324556767940521240234375,
    "points": 17,
    "centroid": {
        "lat": 31.5121572529411793084364035166800022125244140625,
        "lon": 32.29101735294117503372035571373999118804931640625
    },
    "bbox": {
        "min_lat": 31.51186500000000023646862246096134185791015625,
        "min_lon": 32.29073329999999941719579510390758514404296875,
        "max_lat": 31.512338299999999691181074013002216815948486328125,
        "max_lon": 32.29126500000000277168510365299880504608154296875
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 7, 2026 00:53 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 6h 27m
  • Data Points: 17 AIS positions
  • Period: 2026-09-07T00:53:02+00:00 to 2026-09-07T07:20:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 387.3999999999999772626324556767940521240234375,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-09-07T00:53:02+00:00",
        "lat": 31.512191699999998917292032274417579174041748046875,
        "lon": 32.29113499999999703504727222025394439697265625
    },
    "last_point": {
        "ts": "2026-09-07T07:20:25+00:00",
        "lat": 31.5119499999999987949195201508700847625732421875,
        "lon": 32.29073329999999941719579510390758514404296875
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 6, 2026 23:26 UTC 75.0%
  • Duration: 6h 27m
  • Radius: 43 meters
  • Data Points: 16 AIS positions
  • Centroid: 31.5122, 32.2910
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 43,
    "duration_minutes": 387,
    "points": 16,
    "centroid": {
        "lat": 31.51216603750000189165803021751344203948974609375,
        "lon": 32.29102687500000001818989403545856475830078125
    },
    "bbox": {
        "min_lat": 31.51186500000000023646862246096134185791015625,
        "min_lon": 32.2907000000000010686562745831906795501708984375,
        "max_lat": 31.512338299999999691181074013002216815948486328125,
        "max_lon": 32.29126500000000277168510365299880504608154296875
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 6, 2026 23:26 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 6h 27m
  • Data Points: 16 AIS positions
  • Period: 2026-09-06T23:35:01+00:00 to 2026-09-07T06:02:03+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 387,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-09-06T23:35:01+00:00",
        "lat": 31.51192830000000100199031294323503971099853515625,
        "lon": 32.2907000000000010686562745831906795501708984375
    },
    "last_point": {
        "ts": "2026-09-07T06:02:03+00:00",
        "lat": 31.512035000000000906084096641279757022857666015625,
        "lon": 32.29086670000000225400071940384805202484130859375
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 6, 2026 22:02 UTC 75.0%
  • Duration: 5h 47m
  • Radius: 36 meters
  • Data Points: 19 AIS positions
  • Centroid: 31.5121, 32.2910
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 35.60000000000000142108547152020037174224853515625,
    "duration_minutes": 347.80000000000001136868377216160297393798828125,
    "points": 19,
    "centroid": {
        "lat": 31.51212043684210328819972346536815166473388671875,
        "lon": 32.29096858947368531289612292312085628509521484375
    },
    "bbox": {
        "min_lat": 31.51186500000000023646862246096134185791015625,
        "min_lon": 32.290698300000002518572728149592876434326171875,
        "max_lat": 31.512338299999999691181074013002216815948486328125,
        "max_lon": 32.29126500000000277168510365299880504608154296875
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 6, 2026 22:02 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 5h 47m
  • Data Points: 19 AIS positions
  • Period: 2026-09-06T22:02:11+00:00 to 2026-09-07T03:49:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 347.80000000000001136868377216160297393798828125,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-09-06T22:02:11+00:00",
        "lat": 31.511901699999999237888914649374783039093017578125,
        "lon": 32.29070999999999713736542616970837116241455078125
    },
    "last_point": {
        "ts": "2026-09-07T03:49:57+00:00",
        "lat": 31.51186500000000023646862246096134185791015625,
        "lon": 32.2907416999999981044311425648629665374755859375
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 6, 2026 21:38 UTC 75.0%
  • Duration: 6h 11m
  • Radius: 37 meters
  • Data Points: 21 AIS positions
  • Centroid: 31.5121, 32.2910
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 36.60000000000000142108547152020037174224853515625,
    "duration_minutes": 371.80000000000001136868377216160297393798828125,
    "points": 21,
    "centroid": {
        "lat": 31.512099128571424699885028530843555927276611328125,
        "lon": 32.29095149999999847523213247768580913543701171875
    },
    "bbox": {
        "min_lat": 31.51186500000000023646862246096134185791015625,
        "min_lon": 32.290698300000002518572728149592876434326171875,
        "max_lat": 31.512338299999999691181074013002216815948486328125,
        "max_lon": 32.29126500000000277168510365299880504608154296875
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 6, 2026 21:38 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 6h 11m
  • Data Points: 21 AIS positions
  • Period: 2026-09-06T21:38:10+00:00 to 2026-09-07T03:49:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 371.80000000000001136868377216160297393798828125,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-09-06T21:38:10+00:00",
        "lat": 31.51189169999999961646608426235616207122802734375,
        "lon": 32.29086499999999659848981536924839019775390625
    },
    "last_point": {
        "ts": "2026-09-07T03:49:57+00:00",
        "lat": 31.51186500000000023646862246096134185791015625,
        "lon": 32.2907416999999981044311425648629665374755859375
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 6, 2026 18:16 UTC 75.0%
  • Duration: 6h 38m
  • Radius: 37 meters
  • Data Points: 15 AIS positions
  • Centroid: 31.5120, 32.2909
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 36.7000000000000028421709430404007434844970703125,
    "duration_minutes": 398.30000000000001136868377216160297393798828125,
    "points": 15,
    "centroid": {
        "lat": 31.512034113333331930562053457833826541900634765625,
        "lon": 32.29090176666667133531518629752099514007568359375
    },
    "bbox": {
        "min_lat": 31.511803300000000405134414904750883579254150390625,
        "min_lon": 32.290698300000002518572728149592876434326171875,
        "max_lat": 31.512273300000000375575837097130715847015380859375,
        "max_lon": 32.29120329999999938763721729628741741180419921875
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 6, 2026 18:16 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 6h 38m
  • Data Points: 15 AIS positions
  • Period: 2026-09-06T18:50:42+00:00 to 2026-09-07T01:29:02+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 398.30000000000001136868377216160297393798828125,
    "points_in_zone": 15,
    "first_point": {
        "ts": "2026-09-06T18:50:42+00:00",
        "lat": 31.511803300000000405134414904750883579254150390625,
        "lon": 32.2908850000000029467628337442874908447265625
    },
    "last_point": {
        "ts": "2026-09-07T01:29:02+00:00",
        "lat": 31.51225170000000019854269339703023433685302734375,
        "lon": 32.291193300000003318928065709769725799560546875
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 6, 2026 17:24 UTC 75.0%
  • Duration: 6h 10m
  • Radius: 16 meters
  • Data Points: 15 AIS positions
  • Centroid: 31.5119, 32.2908
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 16.10000000000000142108547152020037174224853515625,
    "duration_minutes": 370.6000000000000227373675443232059478759765625,
    "points": 15,
    "centroid": {
        "lat": 31.511854333333335631550653488375246524810791015625,
        "lon": 32.290773986666664541189675219357013702392578125
    },
    "bbox": {
        "min_lat": 31.511713300000000259615262621082365512847900390625,
        "min_lon": 32.29067500000000023874235921539366245269775390625,
        "max_lat": 31.51193500000000113914211397059261798858642578125,
        "max_lon": 32.2909183000000012953023542650043964385986328125
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 6, 2026 17:24 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 6h 10m
  • Data Points: 15 AIS positions
  • Period: 2026-09-06T17:24:23+00:00 to 2026-09-06T23:35:01+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 370.6000000000000227373675443232059478759765625,
    "points_in_zone": 15,
    "first_point": {
        "ts": "2026-09-06T17:24:23+00:00",
        "lat": 31.51177500000000009094947017729282379150390625,
        "lon": 32.2908350000000012869350030086934566497802734375
    },
    "last_point": {
        "ts": "2026-09-06T23:35:01+00:00",
        "lat": 31.51192830000000100199031294323503971099853515625,
        "lon": 32.2907000000000010686562745831906795501708984375
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 6, 2026 16:00 UTC 75.0%
  • Duration: 6h 5m
  • Radius: 16 meters
  • Data Points: 17 AIS positions
  • Centroid: 31.5118, 32.2908
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 15.800000000000000710542735760100185871124267578125,
    "duration_minutes": 365.80000000000001136868377216160297393798828125,
    "points": 17,
    "centroid": {
        "lat": 31.51182284117647469656731118448078632354736328125,
        "lon": 32.2907581235294145471925730817019939422607421875
    },
    "bbox": {
        "min_lat": 31.511713300000000259615262621082365512847900390625,
        "min_lon": 32.2905932999999976118488120846450328826904296875,
        "max_lat": 31.51191000000000030922819860279560089111328125,
        "max_lon": 32.2909183000000012953023542650043964385986328125
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 6, 2026 16:00 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 6h 5m
  • Data Points: 17 AIS positions
  • Period: 2026-09-06T16:00:22+00:00 to 2026-09-06T22:06:12+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 365.80000000000001136868377216160297393798828125,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-09-06T16:00:22+00:00",
        "lat": 31.51177500000000009094947017729282379150390625,
        "lon": 32.29061829999999844176272745244204998016357421875
    },
    "last_point": {
        "ts": "2026-09-06T22:06:12+00:00",
        "lat": 31.5118982999999985850081429816782474517822265625,
        "lon": 32.29071330000000017435013432987034320831298828125
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Eastern Black Sea Surveillance Zone Sep 6, 2026 15:10 UTC 85/100
Vessel A: FLORA 1 (YENISEI) RUSSIA
Vessel B: TEWEST (TEWEST) SIERRA LEONE
  • Minimum Distance: 34 meters
  • Average Distance: 42 meters
  • Duration: 1h 21m
  • Period: 2026-09-06T15:10:42+00:00 to 2026-09-06T16:31:46+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Black Sea Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (YENISEI and TEWEST) maintained close proximity (min 34m, avg 42m) for 81 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Black Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 34m, avg 42m
Duration15/25Duration 81 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Black Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-06T21:15:01.549631+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273120320,
        "imo": 9307815,
        "name": "YENISEI",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 667002062,
        "imo": 9337327,
        "name": "TEWEST",
        "flag": "SIERRA LEONE"
    },
    "min_distance_m": 34.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 41.89999999999999857891452847979962825775146484375,
    "distance_consistency_m": 5.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 81.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 4864,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-09-06T15:10:42+00:00",
        "end": "2026-09-06T16:31:46+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 34m, avg 42m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 81 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Black Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YENISEI and TEWEST) maintained close proximity (min 34m, avg 42m) for 81 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Black Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 31.5118858000000017227648640982806682586669921875,
            "lon": 32.2908824000000009846189641393721103668212890625
        },
        "time_window": {
            "start_ts": "2026-09-06T15:10:42+00:00",
            "end_ts": "2026-09-06T16:31:46+00:00"
        },
        "searched_at": "2026-09-06T21:15:01.549631+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 6, 2026 15:09 UTC 75.0%
  • Duration: 6h 32m
  • Radius: 17 meters
  • Data Points: 24 AIS positions
  • Centroid: 31.5118, 32.2907
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 16.699999999999999289457264239899814128875732421875,
    "duration_minutes": 392.80000000000001136868377216160297393798828125,
    "points": 24,
    "centroid": {
        "lat": 31.511826462500000189947968465276062488555908203125,
        "lon": 32.29074762500000161935531650669872760772705078125
    },
    "bbox": {
        "min_lat": 31.511713300000000259615262621082365512847900390625,
        "min_lon": 32.2905932999999976118488120846450328826904296875,
        "max_lat": 31.51191000000000030922819860279560089111328125,
        "max_lon": 32.2909183000000012953023542650043964385986328125
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 6, 2026 15:09 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 6h 32m
  • Data Points: 24 AIS positions
  • Period: 2026-09-06T15:33:22+00:00 to 2026-09-06T22:06:12+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 392.80000000000001136868377216160297393798828125,
    "points_in_zone": 24,
    "first_point": {
        "ts": "2026-09-06T15:33:22+00:00",
        "lat": 31.51180670000000105801518657244741916656494140625,
        "lon": 32.29066499999999706460585002787411212921142578125
    },
    "last_point": {
        "ts": "2026-09-06T22:06:12+00:00",
        "lat": 31.5118982999999985850081429816782474517822265625,
        "lon": 32.29071330000000017435013432987034320831298828125
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Eastern Black Sea Surveillance Zone Sep 6, 2026 14:49 UTC 90/100
Vessel A: FLORA 1 (YENISEI) RUSSIA
Vessel B: TEWEST (TEWEST) SIERRA LEONE
  • Minimum Distance: 34 meters
  • Average Distance: 42 meters
  • Duration: 1h 42m
  • Period: 2026-09-06T14:49:47+00:00 to 2026-09-06T16:31:46+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Black Sea Surveillance Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (YENISEI and TEWEST) maintained close proximity (min 34m, avg 42m) for 102 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Black Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 34m, avg 42m
Duration20/25Duration 102 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Black Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-06T20:00:01.401177+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273120320,
        "imo": 9307815,
        "name": "YENISEI",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 667002062,
        "imo": 9337327,
        "name": "TEWEST",
        "flag": "SIERRA LEONE"
    },
    "min_distance_m": 34.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 41.60000000000000142108547152020037174224853515625,
    "distance_consistency_m": 4.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 102,
    "overlap_duration_s": 6119,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-09-06T14:49:47+00:00",
        "end": "2026-09-06T16:31:46+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 34m, avg 42m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 102 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Black Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YENISEI and TEWEST) maintained close proximity (min 34m, avg 42m) for 102 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Black Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 31.511885199999998263820089050568640232086181640625,
            "lon": 32.29088610000000159061528393067419528961181640625
        },
        "time_window": {
            "start_ts": "2026-09-06T14:49:47+00:00",
            "end_ts": "2026-09-06T16:31:46+00:00"
        },
        "searched_at": "2026-09-06T20:00:01.401177+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 6, 2026 14:03 UTC 75.0%
  • Duration: 4h 50m
  • Radius: 16 meters
  • Data Points: 24 AIS positions
  • Centroid: 31.5118, 32.2908
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 15.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 290.19999999999998863131622783839702606201171875,
    "points": 24,
    "centroid": {
        "lat": 31.511809308333329937568123568780720233917236328125,
        "lon": 32.29075214166666540904770954512059688568115234375
    },
    "bbox": {
        "min_lat": 31.511713300000000259615262621082365512847900390625,
        "min_lon": 32.2905932999999976118488120846450328826904296875,
        "max_lat": 31.51191000000000030922819860279560089111328125,
        "max_lon": 32.2909183000000012953023542650043964385986328125
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 6, 2026 14:03 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 4h 50m
  • Data Points: 24 AIS positions
  • Period: 2026-09-06T14:03:20+00:00 to 2026-09-06T18:53:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 290.19999999999998863131622783839702606201171875,
    "points_in_zone": 24,
    "first_point": {
        "ts": "2026-09-06T14:03:20+00:00",
        "lat": 31.511771700000000606678440817631781101226806640625,
        "lon": 32.29085169999999749279595562256872653961181640625
    },
    "last_point": {
        "ts": "2026-09-06T18:53:33+00:00",
        "lat": 31.511873300000001307807906414382159709930419921875,
        "lon": 32.29076169999999734727680333890020847320556640625
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Eastern Black Sea Surveillance Zone Sep 6, 2026 13:01 UTC 95/100
Vessel A: FLORA 1 (YENISEI) RUSSIA
Vessel B: TEWEST (TEWEST) SIERRA LEONE
  • Minimum Distance: 34 meters
  • Average Distance: 42 meters
  • Duration: 3h 29m
  • Period: 2026-09-06T13:01:55+00:00 to 2026-09-06T16:31:46+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Black Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (YENISEI and TEWEST) maintained close proximity (min 34m, avg 42m) for 210 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Black Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 34m, avg 42m
Duration25/25Duration 210 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Black Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-06T19:45:01.483736+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273120320,
        "imo": 9307815,
        "name": "YENISEI",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 667002062,
        "imo": 9337327,
        "name": "TEWEST",
        "flag": "SIERRA LEONE"
    },
    "min_distance_m": 34.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 41.7000000000000028421709430404007434844970703125,
    "distance_consistency_m": 4.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 209.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 12591,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-09-06T13:01:55+00:00",
        "end": "2026-09-06T16:31:46+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 34m, avg 42m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 210 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Black Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YENISEI and TEWEST) maintained close proximity (min 34m, avg 42m) for 210 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Black Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 31.5119040000000012469172361306846141815185546875,
            "lon": 32.29090599999999966485120239667594432830810546875
        },
        "time_window": {
            "start_ts": "2026-09-06T13:01:55+00:00",
            "end_ts": "2026-09-06T16:31:46+00:00"
        },
        "searched_at": "2026-09-06T19:45:01.483736+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 6, 2026 13:00 UTC 75.0%
  • Duration: 5h 53m
  • Radius: 21 meters
  • Data Points: 28 AIS positions
  • Centroid: 31.5118, 32.2908
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 21.10000000000000142108547152020037174224853515625,
    "duration_minutes": 353.19999999999998863131622783839702606201171875,
    "points": 28,
    "centroid": {
        "lat": 31.511824882142850157151769963093101978302001953125,
        "lon": 32.29076832499999483161445823498070240020751953125
    },
    "bbox": {
        "min_lat": 31.511713300000000259615262621082365512847900390625,
        "min_lon": 32.2905932999999976118488120846450328826904296875,
        "max_lat": 31.51198169999999976198523654602468013763427734375,
        "max_lon": 32.2909183000000012953023542650043964385986328125
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 6, 2026 13:00 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 5h 53m
  • Data Points: 28 AIS positions
  • Period: 2026-09-06T13:00:21+00:00 to 2026-09-06T18:53:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 353.19999999999998863131622783839702606201171875,
    "points_in_zone": 28,
    "first_point": {
        "ts": "2026-09-06T13:00:21+00:00",
        "lat": 31.51198169999999976198523654602468013763427734375,
        "lon": 32.29089499999999901547198533080518245697021484375
    },
    "last_point": {
        "ts": "2026-09-06T18:53:33+00:00",
        "lat": 31.511873300000001307807906414382159709930419921875,
        "lon": 32.29076169999999734727680333890020847320556640625
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Eastern Black Sea Surveillance Zone Sep 6, 2026 12:55 UTC 95/100
Vessel A: FLORA 1 (YENISEI) RUSSIA
Vessel B: TEWEST (TEWEST) SIERRA LEONE
  • Minimum Distance: 34 meters
  • Average Distance: 42 meters
  • Duration: 3h 35m
  • Period: 2026-09-06T12:55:55+00:00 to 2026-09-06T16:31:46+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Black Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (YENISEI and TEWEST) maintained close proximity (min 34m, avg 42m) for 216 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Black Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 34m, avg 42m
Duration25/25Duration 216 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Black Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-06T17:15:03.753551+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273120320,
        "imo": 9307815,
        "name": "YENISEI",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 667002062,
        "imo": 9337327,
        "name": "TEWEST",
        "flag": "SIERRA LEONE"
    },
    "min_distance_m": 34.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 41.89999999999999857891452847979962825775146484375,
    "distance_consistency_m": 4.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 215.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 12951,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-09-06T12:55:55+00:00",
        "end": "2026-09-06T16:31:46+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 34m, avg 42m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 216 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Black Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YENISEI and TEWEST) maintained close proximity (min 34m, avg 42m) for 216 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Black Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 31.511921999999998433850123547017574310302734375,
            "lon": 32.2909276999999974577804096043109893798828125
        },
        "time_window": {
            "start_ts": "2026-09-06T12:55:55+00:00",
            "end_ts": "2026-09-06T16:31:46+00:00"
        },
        "searched_at": "2026-09-06T17:15:03.753551+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 6, 2026 12:31 UTC 75.0%
  • Duration: 6h 21m
  • Radius: 19 meters
  • Data Points: 33 AIS positions
  • Centroid: 31.5118, 32.2908
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 18.5,
    "duration_minutes": 381.69999999999998863131622783839702606201171875,
    "points": 33,
    "centroid": {
        "lat": 31.511847275757570940868390607647597789764404296875,
        "lon": 32.29078266666666507944682962261140346527099609375
    },
    "bbox": {
        "min_lat": 31.511713300000000259615262621082365512847900390625,
        "min_lon": 32.2905932999999976118488120846450328826904296875,
        "max_lat": 31.51198169999999976198523654602468013763427734375,
        "max_lon": 32.2909183000000012953023542650043964385986328125
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Zone Dwell Eastern Black Sea Surveillance Zone Sep 6, 2026 12:31 UTC 80.0%
  • Zone: Eastern Black Sea Surveillance Zone
  • Duration: 6h 21m
  • Data Points: 33 AIS positions
  • Period: 2026-09-06T12:31:51+00:00 to 2026-09-06T18:53:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "dwell_minutes": 381.69999999999998863131622783839702606201171875,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-09-06T12:31:51+00:00",
        "lat": 31.51198000000000121190169011242687702178955078125,
        "lon": 32.2908350000000012869350030086934566497802734375
    },
    "last_point": {
        "ts": "2026-09-06T18:53:33+00:00",
        "lat": 31.511873300000001307807906414382159709930419921875,
        "lon": 32.29076169999999734727680333890020847320556640625
    }
}

Methodology: 2026.01.18

Sts Eastern Black Sea Surveillance Zone Sep 6, 2026 10:32 UTC 92/100
Vessel A: FLORA 1 (YENISEI) RUSSIA
Vessel B: TEWEST (TEWEST) SIERRA LEONE
  • Minimum Distance: 34 meters
  • Average Distance: 50 meters
  • Duration: 5h 59m
  • Period: 2026-09-06T10:32:05+00:00 to 2026-09-06T16:31:46+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Black Sea Surveillance Zone

Confidence Analysis

Score: 92/100

High-confidence STS candidate. Two tankers (YENISEI and TEWEST) maintained close proximity (min 34m, avg 50m) for 360 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Black Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 34m, avg 50m
Duration25/25Duration 360 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±27m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273120320,
        "imo": 9307815,
        "name": "YENISEI",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 667002062,
        "imo": 9337327,
        "name": "TEWEST",
        "flag": "SIERRA LEONE"
    },
    "min_distance_m": 34.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 50.2999999999999971578290569595992565155029296875,
    "distance_consistency_m": 27.10000000000000142108547152020037174224853515625,
    "duration_minutes": 359.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 21581,
    "speed_a_avg": 0.13000000000000000444089209850062616169452667236328125,
    "speed_a_std": 0.309999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.13000000000000000444089209850062616169452667236328125,
            "max_sog": 1
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-09-06T10:32:05+00:00",
        "end": "2026-09-06T16:31:46+00:00"
    },
    "points_count": {
        "vessel_a": 10,
        "vessel_b": 10
    },
    "zone_id": "discovered_167",
    "zone_name": "Eastern Black Sea Surveillance Zone",
    "score": {
        "value": 92,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 34m, avg 50m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 360 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b127m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Black Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YENISEI and TEWEST) maintained close proximity (min 34m, avg 50m) for 360 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Black Sea Surveillance Zone, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Eastern Black Sea Surveillance Zone Sep 6, 2026 10:10 UTC 75.0%
  • Duration: 6h 37m
  • Radius: 830 meters
  • Data Points: 33 AIS positions
  • Centroid: 31.5125, 32.2903
  • Zone: Eastern Black Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 829.799999999999954525264911353588104248046875,
    "duration_minutes": 397.80000000000001136868377216160297393798828125,
    "points": 33,
    "centroid": {
        "lat": 31.512549551515149914848734624683856964111328125,
        "lon": 32.29029095454544773247107514180243015289306640625
    },
    "bbox": {
        "min_lat": 31.511720000000000396767063648439943790435791015625,
        "min_lon": 32.2851050000000014961187844164669513702392578125,
        "max_lat": 31.518571699999998969587977626360952854156494140625,
        "max_lon": 32.29089830000000205245669349096715450286865234375
    },
    "zone_id": "discovered_167"
}

Methodology: 2026.01.18

Source snapshot

SanctionerAs ofEntity ID
🇬🇧 UK2025-09-299337327

We mirror official lists; always verify at the source.

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