Omsk

IMO 9418509

Vessel information

Vessel Name Omsk View name history 📜
IMO Number 9418509
MMSI 273371330
Vessel Type Oil Products Tanker | Navire-citerne pour produits pétroliers
Flag 🇷🇺 Russia View flag history 📜
Call Sign UBZU
Gross Tonnage 3,606 GT
Year Built 2008

Sanctioned by

🇺🇸 US 2025-01-10🇪🇺 EU 2025-12-18🇬🇧 UK 2025-09-12🇨🇦 CA 2026-02-19

Company & Ownership

🏢
Gazpromneft Shipping LLC
IMO Company: 5438351
Address Lit A, 3-ya Liniya 62, Vasilievsky Island, St Petersburg, 199178, Russia.
Status Active
Fleet 6.0 owner, 9.0 operator, 10.0 manager, 0.0 beneficial

Management & Operations

ISM Manager
GAZPROMNEFT SHIPPING LLC
Lit A, 3-ya Liniya 62, Vasilievsky Island, St Petersburg, 199178, Russia.
Commercial Manager
GAZPROMNEFT SHIPPING LLC
Lit A, 3-ya Liniya 62, Vasilievsky Island, St Petersburg, 199178, Russia.
Registered Owner
GAZPROMNEFT SHIPPING LLC
Lit A, 3-ya Liniya 62, Vasilievsky Island, St Petersburg, 199178, Russia.

Classification & Safety

Current Classification
Russian Maritime Register of Shipping Delivered

Port State Control (PSC) Inspections

⚠️
Risk Level
LOW
Last 36 Months
Last Inspection
📍 Bayonne
📅 2014-04-13

Programs & Notes

EU Russia Sanctions – Shadow Fleet | SEMA (Canada) — vessel designations | UKRAINE-EO13662] [RUSSIA-EO14024 | The Russia (Sanctions) (EU Exit) Regulations 2019

Secondary sanctions risk: See Section 11 of Executive Order 14024.; alt. Secondary sanctions risk: Ukraine-/Russia-Related Sanctions Regulations, 31 CFR 589.201 and/or 589.209; Vessel Registration Identification IMO 9418509; MMSI 273371330; Linked To: GAZPROMNEFT MARINE BUNKER LIMITED LIABILITY COMPANY. || DateDesignated: 2025-09-12 | 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 9418509 (OMSK) is, has been or is likely to be 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, OMSK is involved in carrying oil or oil products that originated in Russia from Russia to a third country.

Vessel Changes

5 changes

AIS Events

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

Zone Dwell Prigorodnoye/Sakhalin LNG Jul 12, 2026 11:01 UTC 80.0%
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 1h 21m
  • Data Points: 33 AIS positions
  • Period: 2026-07-12T11:01:27+00:00 to 2026-07-12T12:22:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 81,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-07-12T11:01:27+00:00",
        "lat": 46.50735999999999847887011128477752208709716796875,
        "lon": 142.605514999999996916812960989773273468017578125
    },
    "last_point": {
        "ts": "2026-07-12T12:22:26+00:00",
        "lat": 46.29033170000000296795406029559671878814697265625,
        "lon": 142.487150000000013960743672214448451995849609375
    }
}

Methodology: 2026.01.18

Zone Dwell Sakhalin South Approach Jul 12, 2026 11:01 UTC 80.0%
  • Zone: Sakhalin South Approach
  • Duration: 1h 21m
  • Data Points: 33 AIS positions
  • Period: 2026-07-12T11:01:27+00:00 to 2026-07-12T12:22:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 81,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-07-12T11:01:27+00:00",
        "lat": 46.50735999999999847887011128477752208709716796875,
        "lon": 142.605514999999996916812960989773273468017578125
    },
    "last_point": {
        "ts": "2026-07-12T12:22:26+00:00",
        "lat": 46.29033170000000296795406029559671878814697265625,
        "lon": 142.487150000000013960743672214448451995849609375
    }
}

Methodology: 2026.01.18

Zone Dwell Prigorodnoye/Sakhalin LNG Jul 12, 2026 10:05 UTC 80.0%
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 2h 16m
  • Data Points: 51 AIS positions
  • Period: 2026-07-12T10:05:57+00:00 to 2026-07-12T12:22:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 136.5,
    "points_in_zone": 51,
    "first_point": {
        "ts": "2026-07-12T10:05:57+00:00",
        "lat": 46.65559329999999960136847221292555332183837890625,
        "lon": 142.65595830000000887594069354236125946044921875
    },
    "last_point": {
        "ts": "2026-07-12T12:22:26+00:00",
        "lat": 46.29033170000000296795406029559671878814697265625,
        "lon": 142.487150000000013960743672214448451995849609375
    }
}

Methodology: 2026.01.18

Zone Dwell Sakhalin South Approach Jul 12, 2026 10:05 UTC 80.0%
  • Zone: Sakhalin South Approach
  • Duration: 2h 16m
  • Data Points: 51 AIS positions
  • Period: 2026-07-12T10:05:57+00:00 to 2026-07-12T12:22:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 136.5,
    "points_in_zone": 51,
    "first_point": {
        "ts": "2026-07-12T10:05:57+00:00",
        "lat": 46.65559329999999960136847221292555332183837890625,
        "lon": 142.65595830000000887594069354236125946044921875
    },
    "last_point": {
        "ts": "2026-07-12T12:22:26+00:00",
        "lat": 46.29033170000000296795406029559671878814697265625,
        "lon": 142.487150000000013960743672214448451995849609375
    }
}

Methodology: 2026.01.18

Zone Dwell Prigorodnoye/Sakhalin LNG Jul 12, 2026 09:11 UTC 80.0%
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 3h 11m
  • Data Points: 57 AIS positions
  • Period: 2026-07-12T09:11:25+00:00 to 2026-07-12T12:22:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 191,
    "points_in_zone": 57,
    "first_point": {
        "ts": "2026-07-12T09:11:25+00:00",
        "lat": 46.66467329999999691381162847392261028289794921875,
        "lon": 142.662110000000012632881407625973224639892578125
    },
    "last_point": {
        "ts": "2026-07-12T12:22:26+00:00",
        "lat": 46.29033170000000296795406029559671878814697265625,
        "lon": 142.487150000000013960743672214448451995849609375
    }
}

Methodology: 2026.01.18

Zone Dwell Sakhalin South Approach Jul 12, 2026 09:11 UTC 80.0%
  • Zone: Sakhalin South Approach
  • Duration: 3h 11m
  • Data Points: 57 AIS positions
  • Period: 2026-07-12T09:11:25+00:00 to 2026-07-12T12:22:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 191,
    "points_in_zone": 57,
    "first_point": {
        "ts": "2026-07-12T09:11:25+00:00",
        "lat": 46.66467329999999691381162847392261028289794921875,
        "lon": 142.662110000000012632881407625973224639892578125
    },
    "last_point": {
        "ts": "2026-07-12T12:22:26+00:00",
        "lat": 46.29033170000000296795406029559671878814697265625,
        "lon": 142.487150000000013960743672214448451995849609375
    }
}

Methodology: 2026.01.18

Sts Sakhalin South Approach Jul 12, 2026 09:09 UTC 71/100
Vessel A: PROXIMA (PROXIMA) RUSSIA
Vessel B: Omsk (OMSK) Russia
  • Minimum Distance: 20 meters
  • Average Distance: 45 meters
  • Duration: 54 minutes
  • Period: 2026-07-12T09:09:45+00:00 to 2026-07-12T10:03:43+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.3 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 71/100

Moderate-confidence STS candidate. Two tankers (PROXIMA and OMSK) maintained close proximity (min 20m, avg 45m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 20m, avg 45m
Duration10/25Duration 54 minutes
Speed Stability14/20both nearly stationary; somewhat variable speeds
Distance Consistency12/15Distance variance ±41m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273264690,
        "imo": 9329655,
        "name": "PROXIMA",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273371330,
        "imo": 9418509,
        "name": "OMSK",
        "flag": "Russia"
    },
    "min_distance_m": 19.5,
    "avg_distance_m": 44.60000000000000142108547152020037174224853515625,
    "distance_consistency_m": 41.39999999999999857891452847979962825775146484375,
    "duration_minutes": 54,
    "overlap_duration_s": 3238,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_avg": 0.2800000000000000266453525910037569701671600341796875,
    "speed_b_std": 0.520000000000000017763568394002504646778106689453125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.2800000000000000266453525910037569701671600341796875,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        }
    },
    "time_window": {
        "start": "2026-07-12T09:09:45+00:00",
        "end": "2026-07-12T10:03:43+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 71,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 20m, avg 45m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 54 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 12,
                "max": 15,
                "detail": "Distance variance \u00b141m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (PROXIMA and OMSK) maintained close proximity (min 20m, avg 45m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Prigorodnoye/Sakhalin LNG Jul 12, 2026 09:09 UTC 71/100
Vessel A: PROXIMA (PROXIMA) RUSSIA
Vessel B: Omsk (OMSK) Russia
  • Minimum Distance: 20 meters
  • Average Distance: 45 meters
  • Duration: 54 minutes
  • Period: 2026-07-12T09:09:45+00:00 to 2026-07-12T10:03:43+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.3 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 71/100

Moderate-confidence STS candidate. Two tankers (PROXIMA and OMSK) maintained close proximity (min 20m, avg 45m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye/Sakhalin LNG, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 20m, avg 45m
Duration10/25Duration 54 minutes
Speed Stability14/20both nearly stationary; somewhat variable speeds
Distance Consistency12/15Distance variance ±41m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273264690,
        "imo": 9329655,
        "name": "PROXIMA",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273371330,
        "imo": 9418509,
        "name": "OMSK",
        "flag": "Russia"
    },
    "min_distance_m": 19.5,
    "avg_distance_m": 44.60000000000000142108547152020037174224853515625,
    "distance_consistency_m": 41.39999999999999857891452847979962825775146484375,
    "duration_minutes": 54,
    "overlap_duration_s": 3238,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_avg": 0.2800000000000000266453525910037569701671600341796875,
    "speed_b_std": 0.520000000000000017763568394002504646778106689453125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.2800000000000000266453525910037569701671600341796875,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        }
    },
    "time_window": {
        "start": "2026-07-12T09:09:45+00:00",
        "end": "2026-07-12T10:03:43+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 71,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 20m, avg 45m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 54 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 12,
                "max": 15,
                "detail": "Distance variance \u00b141m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (PROXIMA and OMSK) maintained close proximity (min 20m, avg 45m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Sakhalin South Approach Jul 12, 2026 08:05 UTC 75.0%
  • Duration: 2 hours
  • Radius: 1,001 meters
  • Data Points: 12 AIS positions
  • Centroid: 46.6638, 142.6615
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 1000.799999999999954525264911353588104248046875,
    "duration_minutes": 120.5,
    "points": 12,
    "centroid": {
        "lat": 46.66375179166666242736027925275266170501708984375,
        "lon": 142.661486658333359400785411708056926727294921875
    },
    "bbox": {
        "min_lat": 46.65559329999999960136847221292555332183837890625,
        "min_lon": 142.65595830000000887594069354236125946044921875,
        "max_lat": 46.66473500000000029785951483063399791717529296875,
        "max_lon": 142.662323299999997061604517512023448944091796875
    },
    "zone_id": "russia_sakhalin_south"
}

Methodology: 2026.01.18

Loiter Prigorodnoye/Sakhalin LNG Jul 12, 2026 08:05 UTC 75.0%
  • Duration: 2 hours
  • Radius: 1,001 meters
  • Data Points: 12 AIS positions
  • Centroid: 46.6638, 142.6615
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 1000.799999999999954525264911353588104248046875,
    "duration_minutes": 120.5,
    "points": 12,
    "centroid": {
        "lat": 46.66375179166666242736027925275266170501708984375,
        "lon": 142.661486658333359400785411708056926727294921875
    },
    "bbox": {
        "min_lat": 46.65559329999999960136847221292555332183837890625,
        "min_lon": 142.65595830000000887594069354236125946044921875,
        "max_lat": 46.66473500000000029785951483063399791717529296875,
        "max_lon": 142.662323299999997061604517512023448944091796875
    },
    "zone_id": "russia_prigorodnoye"
}

Methodology: 2026.01.18

Zone Dwell Prigorodnoye/Sakhalin LNG Jul 12, 2026 08:05 UTC 80.0%
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 4h 17m
  • Data Points: 62 AIS positions
  • Period: 2026-07-12T08:05:25+00:00 to 2026-07-12T12:22:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 257,
    "points_in_zone": 62,
    "first_point": {
        "ts": "2026-07-12T08:05:25+00:00",
        "lat": 46.6647133000000025049303076229989528656005859375,
        "lon": 142.661796699999996462793205864727497100830078125
    },
    "last_point": {
        "ts": "2026-07-12T12:22:26+00:00",
        "lat": 46.29033170000000296795406029559671878814697265625,
        "lon": 142.487150000000013960743672214448451995849609375
    }
}

Methodology: 2026.01.18

Zone Dwell Sakhalin South Approach Jul 12, 2026 08:05 UTC 80.0%
  • Zone: Sakhalin South Approach
  • Duration: 4h 17m
  • Data Points: 62 AIS positions
  • Period: 2026-07-12T08:05:25+00:00 to 2026-07-12T12:22:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 257,
    "points_in_zone": 62,
    "first_point": {
        "ts": "2026-07-12T08:05:25+00:00",
        "lat": 46.6647133000000025049303076229989528656005859375,
        "lon": 142.661796699999996462793205864727497100830078125
    },
    "last_point": {
        "ts": "2026-07-12T12:22:26+00:00",
        "lat": 46.29033170000000296795406029559671878814697265625,
        "lon": 142.487150000000013960743672214448451995849609375
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Sakhalin South Approach Jul 12, 2026 08:05 UTC 87/100
Vessel A: Omsk (OMSK) Russia
Vessel B: PROXIMA (PROXIMA) RUSSIA
  • Minimum Distance: 2 meters
  • Average Distance: 32 meters
  • Duration: 1h 51m
  • Period: 2026-07-12T08:05:25+00:00 to 2026-07-12T09:56:26+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 87/100

High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 32m) for 111 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 2m, avg 32m
Duration20/25Duration 111 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±30m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-12T14:45:07.005655+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273371330,
        "imo": 9418509,
        "name": "OMSK",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273264690,
        "imo": 9329655,
        "name": "PROXIMA",
        "flag": "RUSSIA"
    },
    "min_distance_m": 2.399999999999999911182158029987476766109466552734375,
    "avg_distance_m": 31.89999999999999857891452847979962825775146484375,
    "distance_consistency_m": 30,
    "duration_minutes": 111,
    "overlap_duration_s": 6661,
    "speed_a_avg": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_a_std": 0.35999999999999998667732370449812151491641998291015625,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1499999999999999944488848768742172978818416595458984375,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-12T08:05:25+00:00",
        "end": "2026-07-12T09:56:26+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 87,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 2m, avg 32m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 111 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b130m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 32m) for 111 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.6646056000000015728801372461020946502685546875,
            "lon": 142.661974899999989929710864089429378509521484375
        },
        "time_window": {
            "start_ts": "2026-07-12T08:05:25+00:00",
            "end_ts": "2026-07-12T09:56:26+00:00"
        },
        "searched_at": "2026-07-12T14:45:07.005655+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Prigorodnoye/Sakhalin LNG Jul 12, 2026 08:05 UTC 87/100
Vessel A: Omsk (OMSK) Russia
Vessel B: PROXIMA (PROXIMA) RUSSIA
  • Minimum Distance: 2 meters
  • Average Distance: 32 meters
  • Duration: 1h 51m
  • Period: 2026-07-12T08:05:25+00:00 to 2026-07-12T09:56:26+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 87/100

High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 32m) for 111 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye/Sakhalin LNG, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 2m, avg 32m
Duration20/25Duration 111 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±30m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-12T14:45:04.451539+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273371330,
        "imo": 9418509,
        "name": "OMSK",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273264690,
        "imo": 9329655,
        "name": "PROXIMA",
        "flag": "RUSSIA"
    },
    "min_distance_m": 2.399999999999999911182158029987476766109466552734375,
    "avg_distance_m": 31.89999999999999857891452847979962825775146484375,
    "distance_consistency_m": 30,
    "duration_minutes": 111,
    "overlap_duration_s": 6661,
    "speed_a_avg": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_a_std": 0.35999999999999998667732370449812151491641998291015625,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1499999999999999944488848768742172978818416595458984375,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-12T08:05:25+00:00",
        "end": "2026-07-12T09:56:26+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 87,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 2m, avg 32m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 111 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b130m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 32m) for 111 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.6646056000000015728801372461020946502685546875,
            "lon": 142.661974899999989929710864089429378509521484375
        },
        "time_window": {
            "start_ts": "2026-07-12T08:05:25+00:00",
            "end_ts": "2026-07-12T09:56:26+00:00"
        },
        "searched_at": "2026-07-12T14:45:04.451539+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Loiter Sakhalin South Approach Jul 12, 2026 07:02 UTC 75.0%
  • Duration: 3h 3m
  • Radius: 1,043 meters
  • Data Points: 20 AIS positions
  • Centroid: 46.6641, 142.6616
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 1042.5,
    "duration_minutes": 183.599999999999994315658113919198513031005859375,
    "points": 20,
    "centroid": {
        "lat": 46.66413307500000229310899158008396625518798828125,
        "lon": 142.66158691499998667495674453675746917724609375
    },
    "bbox": {
        "min_lat": 46.65559329999999960136847221292555332183837890625,
        "min_lon": 142.65595830000000887594069354236125946044921875,
        "max_lat": 46.66473500000000029785951483063399791717529296875,
        "max_lon": 142.662323299999997061604517512023448944091796875
    },
    "zone_id": "russia_sakhalin_south"
}

Methodology: 2026.01.18

Loiter Prigorodnoye/Sakhalin LNG Jul 12, 2026 07:02 UTC 75.0%
  • Duration: 3h 3m
  • Radius: 1,043 meters
  • Data Points: 20 AIS positions
  • Centroid: 46.6641, 142.6616
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 1042.5,
    "duration_minutes": 183.599999999999994315658113919198513031005859375,
    "points": 20,
    "centroid": {
        "lat": 46.66413307500000229310899158008396625518798828125,
        "lon": 142.66158691499998667495674453675746917724609375
    },
    "bbox": {
        "min_lat": 46.65559329999999960136847221292555332183837890625,
        "min_lon": 142.65595830000000887594069354236125946044921875,
        "max_lat": 46.66473500000000029785951483063399791717529296875,
        "max_lon": 142.662323299999997061604517512023448944091796875
    },
    "zone_id": "russia_prigorodnoye"
}

Methodology: 2026.01.18

Zone Dwell Prigorodnoye/Sakhalin LNG Jul 12, 2026 07:02 UTC 80.0%
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 5h 20m
  • Data Points: 70 AIS positions
  • Period: 2026-07-12T07:02:24+00:00 to 2026-07-12T12:22:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 320,
    "points_in_zone": 70,
    "first_point": {
        "ts": "2026-07-12T07:02:24+00:00",
        "lat": 46.66470000000000339923644787631928920745849609375,
        "lon": 142.66153170000001182415871880948543548583984375
    },
    "last_point": {
        "ts": "2026-07-12T12:22:26+00:00",
        "lat": 46.29033170000000296795406029559671878814697265625,
        "lon": 142.487150000000013960743672214448451995849609375
    }
}

Methodology: 2026.01.18

Zone Dwell Sakhalin South Approach Jul 12, 2026 07:02 UTC 80.0%
  • Zone: Sakhalin South Approach
  • Duration: 5h 20m
  • Data Points: 70 AIS positions
  • Period: 2026-07-12T07:02:24+00:00 to 2026-07-12T12:22:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 320,
    "points_in_zone": 70,
    "first_point": {
        "ts": "2026-07-12T07:02:24+00:00",
        "lat": 46.66470000000000339923644787631928920745849609375,
        "lon": 142.66153170000001182415871880948543548583984375
    },
    "last_point": {
        "ts": "2026-07-12T12:22:26+00:00",
        "lat": 46.29033170000000296795406029559671878814697265625,
        "lon": 142.487150000000013960743672214448451995849609375
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Sakhalin South Approach Jul 12, 2026 07:02 UTC 95/100
Vessel A: Omsk (OMSK) Russia
Vessel B: PROXIMA (PROXIMA) RUSSIA
  • Minimum Distance: 2 meters
  • Average Distance: 30 meters
  • Duration: 2h 54m
  • Period: 2026-07-12T07:02:24+00:00 to 2026-07-12T09:56:26+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 30m) for 174 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 Sakhalin South Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 2m, avg 30m
Duration25/25Duration 174 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±22m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-12T13:30:06.377675+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273371330,
        "imo": 9418509,
        "name": "OMSK",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273264690,
        "imo": 9329655,
        "name": "PROXIMA",
        "flag": "RUSSIA"
    },
    "min_distance_m": 2.399999999999999911182158029987476766109466552734375,
    "avg_distance_m": 30.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 22.5,
    "duration_minutes": 174,
    "overlap_duration_s": 10442,
    "speed_a_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_a_std": 0.2800000000000000266453525910037569701671600341796875,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-12T07:02:24+00:00",
        "end": "2026-07-12T09:56:26+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 2m, avg 30m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 174 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b122m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 30m) for 174 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 Sakhalin South Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.66469140000000237478161579929292201995849609375,
            "lon": 142.66183119999999462379491887986660003662109375
        },
        "time_window": {
            "start_ts": "2026-07-12T07:02:24+00:00",
            "end_ts": "2026-07-12T09:56:26+00:00"
        },
        "searched_at": "2026-07-12T13:30:06.377675+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Prigorodnoye/Sakhalin LNG Jul 12, 2026 07:02 UTC 95/100
Vessel A: Omsk (OMSK) Russia
Vessel B: PROXIMA (PROXIMA) RUSSIA
  • Minimum Distance: 2 meters
  • Average Distance: 30 meters
  • Duration: 2h 54m
  • Period: 2026-07-12T07:02:24+00:00 to 2026-07-12T09:56:26+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 30m) for 174 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 Prigorodnoye/Sakhalin LNG, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 2m, avg 30m
Duration25/25Duration 174 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±22m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-12T13:30:03.990182+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273371330,
        "imo": 9418509,
        "name": "OMSK",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273264690,
        "imo": 9329655,
        "name": "PROXIMA",
        "flag": "RUSSIA"
    },
    "min_distance_m": 2.399999999999999911182158029987476766109466552734375,
    "avg_distance_m": 30.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 22.5,
    "duration_minutes": 174,
    "overlap_duration_s": 10442,
    "speed_a_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_a_std": 0.2800000000000000266453525910037569701671600341796875,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-12T07:02:24+00:00",
        "end": "2026-07-12T09:56:26+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 2m, avg 30m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 174 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b122m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 30m) for 174 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 Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.66469140000000237478161579929292201995849609375,
            "lon": 142.66183119999999462379491887986660003662109375
        },
        "time_window": {
            "start_ts": "2026-07-12T07:02:24+00:00",
            "end_ts": "2026-07-12T09:56:26+00:00"
        },
        "searched_at": "2026-07-12T13:30:03.990182+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Loiter Sakhalin South Approach Jul 12, 2026 06:11 UTC 75.0%
  • Duration: 3h 54m
  • Radius: 1,058 meters
  • Data Points: 27 AIS positions
  • Centroid: 46.6643, 142.6616
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 1057.799999999999954525264911353588104248046875,
    "duration_minutes": 234.599999999999994315658113919198513031005859375,
    "points": 27,
    "centroid": {
        "lat": 46.664278696296292991974041797220706939697265625,
        "lon": 142.661603766666672754581668414175510406494140625
    },
    "bbox": {
        "min_lat": 46.65559329999999960136847221292555332183837890625,
        "min_lon": 142.65595830000000887594069354236125946044921875,
        "max_lat": 46.66473500000000029785951483063399791717529296875,
        "max_lon": 142.662323299999997061604517512023448944091796875
    },
    "zone_id": "russia_sakhalin_south"
}

Methodology: 2026.01.18

Loiter Prigorodnoye/Sakhalin LNG Jul 12, 2026 06:11 UTC 75.0%
  • Duration: 3h 54m
  • Radius: 1,058 meters
  • Data Points: 27 AIS positions
  • Centroid: 46.6643, 142.6616
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 1057.799999999999954525264911353588104248046875,
    "duration_minutes": 234.599999999999994315658113919198513031005859375,
    "points": 27,
    "centroid": {
        "lat": 46.664278696296292991974041797220706939697265625,
        "lon": 142.661603766666672754581668414175510406494140625
    },
    "bbox": {
        "min_lat": 46.65559329999999960136847221292555332183837890625,
        "min_lon": 142.65595830000000887594069354236125946044921875,
        "max_lat": 46.66473500000000029785951483063399791717529296875,
        "max_lon": 142.662323299999997061604517512023448944091796875
    },
    "zone_id": "russia_prigorodnoye"
}

Methodology: 2026.01.18

Zone Dwell Sakhalin South Approach Jul 12, 2026 06:11 UTC 80.0%
  • Zone: Sakhalin South Approach
  • Duration: 6h 11m
  • Data Points: 77 AIS positions
  • Period: 2026-07-12T06:11:23+00:00 to 2026-07-12T12:22:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 371.1000000000000227373675443232059478759765625,
    "points_in_zone": 77,
    "first_point": {
        "ts": "2026-07-12T06:11:23+00:00",
        "lat": 46.66465500000000332647687173448503017425537109375,
        "lon": 142.66193670000001247899490408599376678466796875
    },
    "last_point": {
        "ts": "2026-07-12T12:22:26+00:00",
        "lat": 46.29033170000000296795406029559671878814697265625,
        "lon": 142.487150000000013960743672214448451995849609375
    }
}

Methodology: 2026.01.18

Zone Dwell Prigorodnoye/Sakhalin LNG Jul 12, 2026 06:11 UTC 80.0%
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 11m
  • Data Points: 77 AIS positions
  • Period: 2026-07-12T06:11:23+00:00 to 2026-07-12T12:22:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 371.1000000000000227373675443232059478759765625,
    "points_in_zone": 77,
    "first_point": {
        "ts": "2026-07-12T06:11:23+00:00",
        "lat": 46.66465500000000332647687173448503017425537109375,
        "lon": 142.66193670000001247899490408599376678466796875
    },
    "last_point": {
        "ts": "2026-07-12T12:22:26+00:00",
        "lat": 46.29033170000000296795406029559671878814697265625,
        "lon": 142.487150000000013960743672214448451995849609375
    }
}

Methodology: 2026.01.18

Sts Sakhalin South Approach Jul 12, 2026 06:06 UTC 95/100
Vessel A: Omsk (OMSK) Russia
Vessel B: PROXIMA (PROXIMA) RUSSIA
  • Minimum Distance: 2 meters
  • Average Distance: 30 meters
  • Duration: 3h 33m
  • Period: 2026-07-12T06:23:24+00:00 to 2026-07-12T09:56:26+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 30m) for 213 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 Sakhalin South Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 2m, avg 30m
Duration25/25Duration 213 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±20m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273371330,
        "imo": 9418509,
        "name": "OMSK",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273264690,
        "imo": 9329655,
        "name": "PROXIMA",
        "flag": "RUSSIA"
    },
    "min_distance_m": 2.399999999999999911182158029987476766109466552734375,
    "avg_distance_m": 30.199999999999999289457264239899814128875732421875,
    "distance_consistency_m": 19.89999999999999857891452847979962825775146484375,
    "duration_minutes": 213,
    "overlap_duration_s": 12782,
    "speed_a_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_a_std": 0.25,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-12T06:23:24+00:00",
        "end": "2026-07-12T09:56:26+00:00"
    },
    "points_count": {
        "vessel_a": 24,
        "vessel_b": 24
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 2m, avg 30m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 213 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b120m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 30m) for 213 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 Sakhalin South Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Prigorodnoye/Sakhalin LNG Jul 12, 2026 06:06 UTC 95/100
Vessel A: Omsk (OMSK) Russia
Vessel B: PROXIMA (PROXIMA) RUSSIA
  • Minimum Distance: 2 meters
  • Average Distance: 30 meters
  • Duration: 3h 33m
  • Period: 2026-07-12T06:23:24+00:00 to 2026-07-12T09:56:26+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 30m) for 213 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 Prigorodnoye/Sakhalin LNG, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 2m, avg 30m
Duration25/25Duration 213 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±20m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273371330,
        "imo": 9418509,
        "name": "OMSK",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273264690,
        "imo": 9329655,
        "name": "PROXIMA",
        "flag": "RUSSIA"
    },
    "min_distance_m": 2.399999999999999911182158029987476766109466552734375,
    "avg_distance_m": 30.199999999999999289457264239899814128875732421875,
    "distance_consistency_m": 19.89999999999999857891452847979962825775146484375,
    "duration_minutes": 213,
    "overlap_duration_s": 12782,
    "speed_a_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_a_std": 0.25,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-12T06:23:24+00:00",
        "end": "2026-07-12T09:56:26+00:00"
    },
    "points_count": {
        "vessel_a": 24,
        "vessel_b": 24
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 2m, avg 30m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 213 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b120m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 30m) for 213 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 Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Sakhalin South Approach Jul 12, 2026 05:01 UTC 75.0%
  • Duration: 5h 4m
  • Radius: 1,065 meters
  • Data Points: 33 AIS positions
  • Centroid: 46.6643, 142.6617
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 1065.299999999999954525264911353588104248046875,
    "duration_minutes": 304.6000000000000227373675443232059478759765625,
    "points": 33,
    "centroid": {
        "lat": 46.66432948787878132179685053415596485137939453125,
        "lon": 142.66167989696970153090660460293292999267578125
    },
    "bbox": {
        "min_lat": 46.65559329999999960136847221292555332183837890625,
        "min_lon": 142.65595830000000887594069354236125946044921875,
        "max_lat": 46.664798300000001063381205312907695770263671875,
        "max_lon": 142.66244829999999410574673675000667572021484375
    },
    "zone_id": "russia_sakhalin_south"
}

Methodology: 2026.01.18

Loiter Prigorodnoye/Sakhalin LNG Jul 12, 2026 05:01 UTC 75.0%
  • Duration: 5h 4m
  • Radius: 1,065 meters
  • Data Points: 33 AIS positions
  • Centroid: 46.6643, 142.6617
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 1065.299999999999954525264911353588104248046875,
    "duration_minutes": 304.6000000000000227373675443232059478759765625,
    "points": 33,
    "centroid": {
        "lat": 46.66432948787878132179685053415596485137939453125,
        "lon": 142.66167989696970153090660460293292999267578125
    },
    "bbox": {
        "min_lat": 46.65559329999999960136847221292555332183837890625,
        "min_lon": 142.65595830000000887594069354236125946044921875,
        "max_lat": 46.664798300000001063381205312907695770263671875,
        "max_lon": 142.66244829999999410574673675000667572021484375
    },
    "zone_id": "russia_prigorodnoye"
}

Methodology: 2026.01.18

Zone Dwell Prigorodnoye/Sakhalin LNG Jul 12, 2026 05:01 UTC 80.0%
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 23m
  • Data Points: 78 AIS positions
  • Period: 2026-07-12T05:59:24+00:00 to 2026-07-12T12:22:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 383,
    "points_in_zone": 78,
    "first_point": {
        "ts": "2026-07-12T05:59:24+00:00",
        "lat": 46.664704999999997880877344869077205657958984375,
        "lon": 142.6619782999999870298779569566249847412109375
    },
    "last_point": {
        "ts": "2026-07-12T12:22:26+00:00",
        "lat": 46.29033170000000296795406029559671878814697265625,
        "lon": 142.487150000000013960743672214448451995849609375
    }
}

Methodology: 2026.01.18

Zone Dwell Sakhalin South Approach Jul 12, 2026 05:01 UTC 80.0%
  • Zone: Sakhalin South Approach
  • Duration: 6h 23m
  • Data Points: 78 AIS positions
  • Period: 2026-07-12T05:59:24+00:00 to 2026-07-12T12:22:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 383,
    "points_in_zone": 78,
    "first_point": {
        "ts": "2026-07-12T05:59:24+00:00",
        "lat": 46.664704999999997880877344869077205657958984375,
        "lon": 142.6619782999999870298779569566249847412109375
    },
    "last_point": {
        "ts": "2026-07-12T12:22:26+00:00",
        "lat": 46.29033170000000296795406029559671878814697265625,
        "lon": 142.487150000000013960743672214448451995849609375
    }
}

Methodology: 2026.01.18

Sts Sakhalin South Approach Jul 12, 2026 05:00 UTC 95/100
Vessel A: Omsk (OMSK) Russia
Vessel B: PROXIMA (PROXIMA) RUSSIA
  • Minimum Distance: 2 meters
  • Average Distance: 30 meters
  • Duration: 4h 27m
  • Period: 2026-07-12T05:29:24+00:00 to 2026-07-12T09:56:26+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 30m) for 267 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 Sakhalin South Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 2m, avg 30m
Duration25/25Duration 267 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±18m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273371330,
        "imo": 9418509,
        "name": "OMSK",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273264690,
        "imo": 9329655,
        "name": "PROXIMA",
        "flag": "RUSSIA"
    },
    "min_distance_m": 2.399999999999999911182158029987476766109466552734375,
    "avg_distance_m": 30.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 18.199999999999999289457264239899814128875732421875,
    "duration_minutes": 267,
    "overlap_duration_s": 16022,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.2200000000000000011102230246251565404236316680908203125,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-12T05:29:24+00:00",
        "end": "2026-07-12T09:56:26+00:00"
    },
    "points_count": {
        "vessel_a": 29,
        "vessel_b": 29
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 2m, avg 30m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 267 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b118m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 30m) for 267 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 Sakhalin South Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Prigorodnoye/Sakhalin LNG Jul 12, 2026 05:00 UTC 95/100
Vessel A: Omsk (OMSK) Russia
Vessel B: PROXIMA (PROXIMA) RUSSIA
  • Minimum Distance: 2 meters
  • Average Distance: 30 meters
  • Duration: 4h 27m
  • Period: 2026-07-12T05:29:24+00:00 to 2026-07-12T09:56:26+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 30m) for 267 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 Prigorodnoye/Sakhalin LNG, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 2m, avg 30m
Duration25/25Duration 267 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±18m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273371330,
        "imo": 9418509,
        "name": "OMSK",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273264690,
        "imo": 9329655,
        "name": "PROXIMA",
        "flag": "RUSSIA"
    },
    "min_distance_m": 2.399999999999999911182158029987476766109466552734375,
    "avg_distance_m": 30.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 18.199999999999999289457264239899814128875732421875,
    "duration_minutes": 267,
    "overlap_duration_s": 16022,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.2200000000000000011102230246251565404236316680908203125,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 1.1999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-12T05:29:24+00:00",
        "end": "2026-07-12T09:56:26+00:00"
    },
    "points_count": {
        "vessel_a": 29,
        "vessel_b": 29
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 2m, avg 30m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 267 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b118m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 30m) for 267 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 Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Sakhalin South Approach Jul 12, 2026 04:54 UTC 92/100
Vessel A: Omsk (OMSK) Russia
Vessel B: PROXIMA (PROXIMA) RUSSIA
  • Minimum Distance: 2 meters
  • Average Distance: 34 meters
  • Duration: 5 hours
  • Period: 2026-07-12T04:56:02+00:00 to 2026-07-12T09:56:26+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 92/100

High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 34m) for 300 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 Sakhalin South Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 2m, avg 34m
Duration25/25Duration 300 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±22m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273371330,
        "imo": 9418509,
        "name": "OMSK",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273264690,
        "imo": 9329655,
        "name": "PROXIMA",
        "flag": "RUSSIA"
    },
    "min_distance_m": 2.399999999999999911182158029987476766109466552734375,
    "avg_distance_m": 33.7000000000000028421709430404007434844970703125,
    "distance_consistency_m": 22.39999999999999857891452847979962825775146484375,
    "duration_minutes": 300.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 18024,
    "speed_a_avg": 0.11999999999999999555910790149937383830547332763671875,
    "speed_a_std": 0.309999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11999999999999999555910790149937383830547332763671875,
            "max_sog": 1.3000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-07-12T04:56:02+00:00",
        "end": "2026-07-12T09:56:26+00:00"
    },
    "points_count": {
        "vessel_a": 33,
        "vessel_b": 33
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 92,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 2m, avg 34m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 300 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b122m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 34m) for 300 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 Sakhalin South Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Prigorodnoye/Sakhalin LNG Jul 12, 2026 04:54 UTC 92/100
Vessel A: Omsk (OMSK) Russia
Vessel B: PROXIMA (PROXIMA) RUSSIA
  • Minimum Distance: 2 meters
  • Average Distance: 34 meters
  • Duration: 5 hours
  • Period: 2026-07-12T04:56:02+00:00 to 2026-07-12T09:56:26+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 92/100

High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 34m) for 300 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 Prigorodnoye/Sakhalin LNG, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 2m, avg 34m
Duration25/25Duration 300 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±22m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273371330,
        "imo": 9418509,
        "name": "OMSK",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273264690,
        "imo": 9329655,
        "name": "PROXIMA",
        "flag": "RUSSIA"
    },
    "min_distance_m": 2.399999999999999911182158029987476766109466552734375,
    "avg_distance_m": 33.7000000000000028421709430404007434844970703125,
    "distance_consistency_m": 22.39999999999999857891452847979962825775146484375,
    "duration_minutes": 300.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 18024,
    "speed_a_avg": 0.11999999999999999555910790149937383830547332763671875,
    "speed_a_std": 0.309999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11999999999999999555910790149937383830547332763671875,
            "max_sog": 1.3000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-07-12T04:56:02+00:00",
        "end": "2026-07-12T09:56:26+00:00"
    },
    "points_count": {
        "vessel_a": 33,
        "vessel_b": 33
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 92,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 2m, avg 34m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 300 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b122m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (OMSK and PROXIMA) maintained close proximity (min 2m, avg 34m) for 300 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 Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Sakhalin South Approach Jul 12, 2026 04:34 UTC 75.0%
  • Duration: 5h 31m
  • Radius: 1,502 meters
  • Data Points: 39 AIS positions
  • Centroid: 46.6634, 142.6607
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 1502.40000000000009094947017729282379150390625,
    "duration_minutes": 331.1000000000000227373675443232059478759765625,
    "points": 39,
    "centroid": {
        "lat": 46.66344914102564445101961609907448291778564453125,
        "lon": 142.660706153846177812738460488617420196533203125
    },
    "bbox": {
        "min_lat": 46.651600000000001955413608811795711517333984375,
        "min_lon": 142.651264999999995097823557443916797637939453125,
        "max_lat": 46.665576700000002574597601778805255889892578125,
        "max_lon": 142.66244829999999410574673675000667572021484375
    },
    "zone_id": "russia_sakhalin_south"
}

Methodology: 2026.01.18

Loiter Prigorodnoye/Sakhalin LNG Jul 12, 2026 04:34 UTC 75.0%
  • Duration: 5h 31m
  • Radius: 1,502 meters
  • Data Points: 39 AIS positions
  • Centroid: 46.6634, 142.6607
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 1502.40000000000009094947017729282379150390625,
    "duration_minutes": 331.1000000000000227373675443232059478759765625,
    "points": 39,
    "centroid": {
        "lat": 46.66344914102564445101961609907448291778564453125,
        "lon": 142.660706153846177812738460488617420196533203125
    },
    "bbox": {
        "min_lat": 46.651600000000001955413608811795711517333984375,
        "min_lon": 142.651264999999995097823557443916797637939453125,
        "max_lat": 46.665576700000002574597601778805255889892578125,
        "max_lon": 142.66244829999999410574673675000667572021484375
    },
    "zone_id": "russia_prigorodnoye"
}

Methodology: 2026.01.18

Zone Dwell Sakhalin South Approach Jul 12, 2026 04:01 UTC 80.0%
  • Zone: Sakhalin South Approach
  • Duration: 6h 32m
  • Data Points: 63 AIS positions
  • Period: 2026-07-12T04:56:02+00:00 to 2026-07-12T11:28:07+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 392.1000000000000227373675443232059478759765625,
    "points_in_zone": 63,
    "first_point": {
        "ts": "2026-07-12T04:56:02+00:00",
        "lat": 46.665576700000002574597601778805255889892578125,
        "lon": 142.66226169999998774073901586234569549560546875
    },
    "last_point": {
        "ts": "2026-07-12T11:28:07+00:00",
        "lat": 46.43337999999999965439201332628726959228515625,
        "lon": 142.587439999999986639522830955684185028076171875
    }
}

Methodology: 2026.01.18

Zone Dwell Prigorodnoye/Sakhalin LNG Jul 12, 2026 04:01 UTC 80.0%
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 32m
  • Data Points: 63 AIS positions
  • Period: 2026-07-12T04:56:02+00:00 to 2026-07-12T11:28:07+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 392.1000000000000227373675443232059478759765625,
    "points_in_zone": 63,
    "first_point": {
        "ts": "2026-07-12T04:56:02+00:00",
        "lat": 46.665576700000002574597601778805255889892578125,
        "lon": 142.66226169999998774073901586234569549560546875
    },
    "last_point": {
        "ts": "2026-07-12T11:28:07+00:00",
        "lat": 46.43337999999999965439201332628726959228515625,
        "lon": 142.587439999999986639522830955684185028076171875
    }
}

Methodology: 2026.01.18

Zone Dwell Sakhalin South Approach Jul 12, 2026 03:02 UTC 80.0%
  • Zone: Sakhalin South Approach
  • Duration: 6h 39m
  • Data Points: 59 AIS positions
  • Period: 2026-07-12T03:50:51+00:00 to 2026-07-12T10:29:56+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 399.1000000000000227373675443232059478759765625,
    "points_in_zone": 59,
    "first_point": {
        "ts": "2026-07-12T03:50:51+00:00",
        "lat": 46.564723299999997152553987689316272735595703125,
        "lon": 142.644763299999993932942743413150310516357421875
    },
    "last_point": {
        "ts": "2026-07-12T10:29:56+00:00",
        "lat": 46.59569830000000223435563384555280208587646484375,
        "lon": 142.62843670000000884101609699428081512451171875
    }
}

Methodology: 2026.01.18

Zone Dwell Prigorodnoye/Sakhalin LNG Jul 12, 2026 03:02 UTC 80.0%
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 39m
  • Data Points: 59 AIS positions
  • Period: 2026-07-12T03:50:51+00:00 to 2026-07-12T10:29:56+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 399.1000000000000227373675443232059478759765625,
    "points_in_zone": 59,
    "first_point": {
        "ts": "2026-07-12T03:50:51+00:00",
        "lat": 46.564723299999997152553987689316272735595703125,
        "lon": 142.644763299999993932942743413150310516357421875
    },
    "last_point": {
        "ts": "2026-07-12T10:29:56+00:00",
        "lat": 46.59569830000000223435563384555280208587646484375,
        "lon": 142.62843670000000884101609699428081512451171875
    }
}

Methodology: 2026.01.18

Zone Dwell Prigorodnoye/Sakhalin LNG Jul 12, 2026 02:00 UTC 80.0%
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 28m
  • Data Points: 63 AIS positions
  • Period: 2026-07-12T02:51:32+00:00 to 2026-07-12T09:20:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 388.8999999999999772626324556767940521240234375,
    "points_in_zone": 63,
    "first_point": {
        "ts": "2026-07-12T02:51:32+00:00",
        "lat": 46.43415999999999854708221391774713993072509765625,
        "lon": 142.6204132999999956155079416930675506591796875
    },
    "last_point": {
        "ts": "2026-07-12T09:20:26+00:00",
        "lat": 46.66465500000000332647687173448503017425537109375,
        "lon": 142.662176700000003393142833374440670013427734375
    }
}

Methodology: 2026.01.18

Zone Dwell Sakhalin South Approach Jul 12, 2026 02:00 UTC 80.0%
  • Zone: Sakhalin South Approach
  • Duration: 6h 28m
  • Data Points: 63 AIS positions
  • Period: 2026-07-12T02:51:32+00:00 to 2026-07-12T09:20:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 388.8999999999999772626324556767940521240234375,
    "points_in_zone": 63,
    "first_point": {
        "ts": "2026-07-12T02:51:32+00:00",
        "lat": 46.43415999999999854708221391774713993072509765625,
        "lon": 142.6204132999999956155079416930675506591796875
    },
    "last_point": {
        "ts": "2026-07-12T09:20:26+00:00",
        "lat": 46.66465500000000332647687173448503017425537109375,
        "lon": 142.662176700000003393142833374440670013427734375
    }
}

Methodology: 2026.01.18

Zone Dwell Sakhalin South Approach Jul 12, 2026 01:44 UTC 80.0%
  • Zone: Sakhalin South Approach
  • Duration: 6h 36m
  • Data Points: 83 AIS positions
  • Period: 2026-07-12T01:52:42+00:00 to 2026-07-12T08:29:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 396.69999999999998863131622783839702606201171875,
    "points_in_zone": 83,
    "first_point": {
        "ts": "2026-07-12T01:52:42+00:00",
        "lat": 46.2987150000000013960743672214448451995849609375,
        "lon": 142.519231700000005957917892374098300933837890625
    },
    "last_point": {
        "ts": "2026-07-12T08:29:25+00:00",
        "lat": 46.6647133000000025049303076229989528656005859375,
        "lon": 142.661763299999989840216585434973239898681640625
    }
}

Methodology: 2026.01.18

Zone Dwell Prigorodnoye/Sakhalin LNG Jul 12, 2026 01:44 UTC 80.0%
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 36m
  • Data Points: 83 AIS positions
  • Period: 2026-07-12T01:52:42+00:00 to 2026-07-12T08:29:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 396.69999999999998863131622783839702606201171875,
    "points_in_zone": 83,
    "first_point": {
        "ts": "2026-07-12T01:52:42+00:00",
        "lat": 46.2987150000000013960743672214448451995849609375,
        "lon": 142.519231700000005957917892374098300933837890625
    },
    "last_point": {
        "ts": "2026-07-12T08:29:25+00:00",
        "lat": 46.6647133000000025049303076229989528656005859375,
        "lon": 142.661763299999989840216585434973239898681640625
    }
}

Methodology: 2026.01.18

Zone Dwell Sakhalin South Approach Jun 19, 2026 06:01 UTC 80.0%
  • Zone: Sakhalin South Approach
  • Duration: 1h 35m
  • Data Points: 33 AIS positions
  • Period: 2026-06-19T06:01:03+00:00 to 2026-06-19T07:36:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 95.5,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-06-19T06:01:03+00:00",
        "lat": 46.430246699999997872509993612766265869140625,
        "lon": 142.945481699999987768023856915533542633056640625
    },
    "last_point": {
        "ts": "2026-06-19T07:36:33+00:00",
        "lat": 46.221558299999998098428477533161640167236328125,
        "lon": 143.177154999999999063220457173883914947509765625
    }
}

Methodology: 2026.01.18

Zone Dwell Prigorodnoye/Sakhalin LNG Jun 19, 2026 06:01 UTC 80.0%
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 1h 35m
  • Data Points: 33 AIS positions
  • Period: 2026-06-19T06:01:03+00:00 to 2026-06-19T07:36:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 95.5,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-06-19T06:01:03+00:00",
        "lat": 46.430246699999997872509993612766265869140625,
        "lon": 142.945481699999987768023856915533542633056640625
    },
    "last_point": {
        "ts": "2026-06-19T07:36:33+00:00",
        "lat": 46.221558299999998098428477533161640167236328125,
        "lon": 143.177154999999999063220457173883914947509765625
    }
}

Methodology: 2026.01.18

Zone Dwell Prigorodnoye/Sakhalin LNG Jun 19, 2026 05:00 UTC 80.0%
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 2h 36m
  • Data Points: 61 AIS positions
  • Period: 2026-06-19T05:00:33+00:00 to 2026-06-19T07:36:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 156,
    "points_in_zone": 61,
    "first_point": {
        "ts": "2026-06-19T05:00:33+00:00",
        "lat": 46.51596669999999988931449479423463344573974609375,
        "lon": 142.733710000000002082742867060005664825439453125
    },
    "last_point": {
        "ts": "2026-06-19T07:36:33+00:00",
        "lat": 46.221558299999998098428477533161640167236328125,
        "lon": 143.177154999999999063220457173883914947509765625
    }
}

Methodology: 2026.01.18

Zone Dwell Sakhalin South Approach Jun 19, 2026 05:00 UTC 80.0%
  • Zone: Sakhalin South Approach
  • Duration: 2h 36m
  • Data Points: 61 AIS positions
  • Period: 2026-06-19T05:00:33+00:00 to 2026-06-19T07:36:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 156,
    "points_in_zone": 61,
    "first_point": {
        "ts": "2026-06-19T05:00:33+00:00",
        "lat": 46.51596669999999988931449479423463344573974609375,
        "lon": 142.733710000000002082742867060005664825439453125
    },
    "last_point": {
        "ts": "2026-06-19T07:36:33+00:00",
        "lat": 46.221558299999998098428477533161640167236328125,
        "lon": 143.177154999999999063220457173883914947509765625
    }
}

Methodology: 2026.01.18

Zone Dwell Sakhalin South Approach Jun 19, 2026 04:01 UTC 80.0%
  • Zone: Sakhalin South Approach
  • Duration: 3h 35m
  • Data Points: 86 AIS positions
  • Period: 2026-06-19T04:01:33+00:00 to 2026-06-19T07:36:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 215,
    "points_in_zone": 86,
    "first_point": {
        "ts": "2026-06-19T04:01:33+00:00",
        "lat": 46.663735000000002628439688123762607574462890625,
        "lon": 142.658015000000006011759978719055652618408203125
    },
    "last_point": {
        "ts": "2026-06-19T07:36:33+00:00",
        "lat": 46.221558299999998098428477533161640167236328125,
        "lon": 143.177154999999999063220457173883914947509765625
    }
}

Methodology: 2026.01.18

Zone Dwell Prigorodnoye/Sakhalin LNG Jun 19, 2026 04:01 UTC 80.0%
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 3h 35m
  • Data Points: 86 AIS positions
  • Period: 2026-06-19T04:01:33+00:00 to 2026-06-19T07:36:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 215,
    "points_in_zone": 86,
    "first_point": {
        "ts": "2026-06-19T04:01:33+00:00",
        "lat": 46.663735000000002628439688123762607574462890625,
        "lon": 142.658015000000006011759978719055652618408203125
    },
    "last_point": {
        "ts": "2026-06-19T07:36:33+00:00",
        "lat": 46.221558299999998098428477533161640167236328125,
        "lon": 143.177154999999999063220457173883914947509765625
    }
}

Methodology: 2026.01.18

Source snapshot

SanctionerAs ofEntity ID
🇬🇧 UK2025-09-299418509
🇺🇸 US2025-09-299418509

We mirror official lists; always verify at the source.

Sanctioned on the same day

  • Akademik Gubkin · IMO 9842190 🇨🇦 CA🇪🇺 EU🇬🇧 UK🇺🇸 US
  • ALEKSEY CHIRIKOV · IMO 9613551 🇺🇸 US
  • ALEXANDER BEGGROV · IMO 9876373 🇺🇸 US
  • ALEXEY BOGOLYUBOV · IMO 9876361 🇺🇸 US
  • ALMOND · IMO 9385142 🇨🇦 CA🇪🇺 EU🇬🇧 UK🇺🇸 US
  • Amell · IMO 9257993 🇨🇦 CA🇬🇧 UK🇺🇸 US
  • APPLE · IMO 9271327 🇨🇦 CA🇪🇺 EU🇬🇧 UK🇺🇸 US
  • Apus · IMO 9280885 🇨🇦 CA🇪🇺 EU🇳🇿 NZ🇬🇧 UK🇺🇸 US