IMO 8724793

Vessel information

Vessel Name Korsakov

IMO Number 8724793

MMSI 273353940

Vessel Type Oil Products Tanker

Flag 🇷🇺 Russia View flag history 📜

Sanctioned by

🇪🇺 EU

Management & Operations

ISM Manager

TRANSBUNKER-NOVO CO LTD

ul Ledneva 5, Novorossiysk, Krasnodarskiy kray, 353900, Russia.

Commercial Manager

TRANSBUNKER-NOVO CO LTD

Classification & Safety

Current Classification

Russian Maritime Register of Shipping Delivered

Programs & Notes

EU Russia Sanctions – Shadow Fleet

AIS Events

50 events detected • 1 zone • Last: Oct 27, 2026

Loiter Ust-Luga Terminal Complex Oct 27, 2026 07:24 UTC 75.0%

Duration: 4h 16m
Radius: 6 meters
Data Points: 28 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 5.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 256.6000000000000227373675443232059478759765625,
    "points": 28,
    "centroid": {
        "lat": 59.77199702499999744986780569888651371002197265625,
        "lon": 28.44343941071428361055950517766177654266357421875
    },
    "bbox": {
        "min_lat": 59.77195999999999997953636921010911464691162109375,
        "min_lon": 28.443403299999999944702722132205963134765625,
        "max_lat": 59.77204830000000157497197506017982959747314453125,
        "max_lon": 28.443496700000000743102646083571016788482666015625
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 27, 2026 07:24 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 4h 16m
Data Points: 28 AIS positions
Period: 2026-10-27T07:24:10+00:00 to 2026-10-27T11:40:48+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 256.6000000000000227373675443232059478759765625,
    "points_in_zone": 28,
    "first_point": {
        "ts": "2026-10-27T07:24:10+00:00",
        "lat": 59.77201670000000177651600097306072711944580078125,
        "lon": 28.44342830000000077461663750000298023223876953125
    },
    "last_point": {
        "ts": "2026-10-27T11:40:48+00:00",
        "lat": 59.7719732999999990852302289567887783050537109375,
        "lon": 28.44342999999999932470018393360078334808349609375
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 25, 2026 13:02 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 1h 19m
Data Points: 10 AIS positions
Period: 2026-10-25T13:02:55+00:00 to 2026-10-25T14:22:05+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 79.2000000000000028421709430404007434844970703125,
    "points_in_zone": 10,
    "first_point": {
        "ts": "2026-10-25T13:02:55+00:00",
        "lat": 59.77199499999999687815943616442382335662841796875,
        "lon": 28.44342329999999918754838290624320507049560546875
    },
    "last_point": {
        "ts": "2026-10-25T14:22:05+00:00",
        "lat": 59.77199499999999687815943616442382335662841796875,
        "lon": 28.4434083000000015317709767259657382965087890625
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 25, 2026 12:02 UTC 75.0%

Duration: 2h 19m
Radius: 3 meters
Data Points: 18 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 2.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 139.5,
    "points": 18,
    "centroid": {
        "lat": 59.7719849055555556560648255981504917144775390625,
        "lon": 28.4434142500000035624907468445599079132080078125
    },
    "bbox": {
        "min_lat": 59.77196169999999852961991564370691776275634765625,
        "min_lon": 28.443381699999999767669578432105481624603271484375,
        "max_lat": 59.77200330000000150221239891834557056427001953125,
        "max_lon": 28.443445000000000533191268914379179477691650390625
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 25, 2026 12:02 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 2h 19m
Data Points: 18 AIS positions
Period: 2026-10-25T12:02:35+00:00 to 2026-10-25T14:22:05+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 139.5,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-10-25T12:02:35+00:00",
        "lat": 59.771978300000000672298483550548553466796875,
        "lon": 28.4434049999999984947862685658037662506103515625
    },
    "last_point": {
        "ts": "2026-10-25T14:22:05+00:00",
        "lat": 59.77199499999999687815943616442382335662841796875,
        "lon": 28.4434083000000015317709767259657382965087890625
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 25, 2026 11:03 UTC 75.0%

Duration: 3h 18m
Radius: 3 meters
Data Points: 25 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 2.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 198.19999999999998863131622783839702606201171875,
    "points": 25,
    "centroid": {
        "lat": 59.7719864000000171699866768904030323028564453125,
        "lon": 28.443415323999996502379872254095971584320068359375
    },
    "bbox": {
        "min_lat": 59.77196169999999852961991564370691776275634765625,
        "min_lon": 28.443381699999999767669578432105481624603271484375,
        "max_lat": 59.77200669999999860237949178554117679595947265625,
        "max_lon": 28.443445000000000533191268914379179477691650390625
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 25, 2026 11:03 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 3h 18m
Data Points: 25 AIS positions
Period: 2026-10-25T11:03:54+00:00 to 2026-10-25T14:22:05+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 198.19999999999998863131622783839702606201171875,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-10-25T11:03:54+00:00",
        "lat": 59.77200669999999860237949178554117679595947265625,
        "lon": 28.443419999999999703277353546582162380218505859375
    },
    "last_point": {
        "ts": "2026-10-25T14:22:05+00:00",
        "lat": 59.77199499999999687815943616442382335662841796875,
        "lon": 28.4434083000000015317709767259657382965087890625
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 25, 2026 10:01 UTC 75.0%

Duration: 4h 21m
Radius: 3 meters
Data Points: 31 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 261,
    "points": 31,
    "centroid": {
        "lat": 59.77199118064518046367084025405347347259521484375,
        "lon": 28.443415741935485385738502372987568378448486328125
    },
    "bbox": {
        "min_lat": 59.77196169999999852961991564370691776275634765625,
        "min_lon": 28.443381699999999767669578432105481624603271484375,
        "max_lat": 59.77201500000000322643245453946292400360107421875,
        "max_lon": 28.443445000000000533191268914379179477691650390625
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 25, 2026 10:01 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 4h 21m
Data Points: 31 AIS positions
Period: 2026-10-25T10:01:06+00:00 to 2026-10-25T14:22:05+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 261,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-10-25T10:01:06+00:00",
        "lat": 59.77201170000000018944774637930095195770263671875,
        "lon": 28.4434150000000016689227777533233165740966796875
    },
    "last_point": {
        "ts": "2026-10-25T14:22:05+00:00",
        "lat": 59.77199499999999687815943616442382335662841796875,
        "lon": 28.4434083000000015317709767259657382965087890625
    }
}

Methodology: 2026.01.18

Sts Ust-Luga Terminal Complex Oct 25, 2026 09:30 UTC 75/100

Vessel A: Korsakov (KORSAKOV) RUSSIA

Vessel B: Vanino (VANINO) RUSSIA

Minimum Distance: 14 meters
Average Distance: 14 meters
Duration: 42 minutes
Period: 2026-10-25T09:30:35+00:00 to 2026-10-25T10:13:14+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga Terminal Complex

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (KORSAKOV and VANINO) maintained close proximity (min 14m, avg 14m) for 43 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 Ust-Luga Terminal Complex, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	25/25	Min distance 14m, avg 14m
Duration	5/25	Duration 43 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±0m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273353940,
        "imo": 8724793,
        "name": "KORSAKOV",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273331620,
        "imo": 8724779,
        "name": "VANINO",
        "flag": "RUSSIA"
    },
    "min_distance_m": 13.5,
    "avg_distance_m": 14.0999999999999996447286321199499070644378662109375,
    "distance_consistency_m": 0.40000000000000002220446049250313080847263336181640625,
    "duration_minutes": 42.60000000000000142108547152020037174224853515625,
    "overlap_duration_s": 2559,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T09:30:35+00:00",
        "end": "2026-10-25T10:13:14+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 14m, avg 14m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 43 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b10m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga Terminal Complex"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (KORSAKOV and VANINO) maintained close proximity (min 14m, avg 14m) for 43 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 Ust-Luga Terminal Complex, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 25, 2026 09:01 UTC 75.0%

Duration: 5h 20m
Radius: 4 meters
Data Points: 36 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 3.5,
    "duration_minutes": 320.8999999999999772626324556767940521240234375,
    "points": 36,
    "centroid": {
        "lat": 59.77199231388890865446228417567908763885498046875,
        "lon": 28.4434141138888918476368417032063007354736328125
    },
    "bbox": {
        "min_lat": 59.77196169999999852961991564370691776275634765625,
        "min_lon": 28.443381699999999767669578432105481624603271484375,
        "max_lat": 59.77201500000000322643245453946292400360107421875,
        "max_lon": 28.443445000000000533191268914379179477691650390625
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 25, 2026 09:01 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 5h 20m
Data Points: 36 AIS positions
Period: 2026-10-25T09:01:14+00:00 to 2026-10-25T14:22:05+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 320.8999999999999772626324556767940521240234375,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-10-25T09:01:14+00:00",
        "lat": 59.77199999999999846522769075818359851837158203125,
        "lon": 28.443400000000000460431692772544920444488525390625
    },
    "last_point": {
        "ts": "2026-10-25T14:22:05+00:00",
        "lat": 59.77199499999999687815943616442382335662841796875,
        "lon": 28.4434083000000015317709767259657382965087890625
    }
}

Methodology: 2026.01.18

Sts Ust-Luga Terminal Complex Oct 25, 2026 08:28 UTC 95/100

Vessel A: Vanino (VANINO) RUSSIA

Vessel B: Korsakov (KORSAKOV) RUSSIA

Minimum Distance: 13 meters
Average Distance: 14 meters
Duration: 5h 31m
Period: 2026-10-25T08:31:48+00:00 to 2026-10-25T14:02:48+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga Terminal Complex

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 13m, avg 14m) for 331 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 Ust-Luga Terminal Complex, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	25/25	Min distance 13m, avg 14m
Duration	25/25	Duration 331 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±1m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273331620,
        "imo": 8724779,
        "name": "VANINO",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273353940,
        "imo": 8724793,
        "name": "KORSAKOV",
        "flag": "RUSSIA"
    },
    "min_distance_m": 12.5999999999999996447286321199499070644378662109375,
    "avg_distance_m": 13.800000000000000710542735760100185871124267578125,
    "distance_consistency_m": 0.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 331,
    "overlap_duration_s": 19860,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T08:31:48+00:00",
        "end": "2026-10-25T14:02:48+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 13m, avg 14m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 331 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga Terminal Complex"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 13m, avg 14m) for 331 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 Ust-Luga Terminal Complex, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 25, 2026 08:00 UTC 75.0%

Duration: 6h 21m
Radius: 4 meters
Data Points: 41 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 3.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 381.19999999999998863131622783839702606201171875,
    "points": 41,
    "centroid": {
        "lat": 59.77199434878050254837944521568715572357177734375,
        "lon": 28.443415563414628621785595896653831005096435546875
    },
    "bbox": {
        "min_lat": 59.77196169999999852961991564370691776275634765625,
        "min_lon": 28.443381699999999767669578432105481624603271484375,
        "max_lat": 59.7720233000000007450580596923828125,
        "max_lon": 28.443445000000000533191268914379179477691650390625
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 25, 2026 08:00 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 6h 21m
Data Points: 41 AIS positions
Period: 2026-10-25T08:00:54+00:00 to 2026-10-25T14:22:05+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 381.19999999999998863131622783839702606201171875,
    "points_in_zone": 41,
    "first_point": {
        "ts": "2026-10-25T08:00:54+00:00",
        "lat": 59.77201000000000163936419994570314884185791015625,
        "lon": 28.443419999999999703277353546582162380218505859375
    },
    "last_point": {
        "ts": "2026-10-25T14:22:05+00:00",
        "lat": 59.77199499999999687815943616442382335662841796875,
        "lon": 28.4434083000000015317709767259657382965087890625
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Ust-Luga Terminal Complex Oct 25, 2026 07:40 UTC 95/100

Vessel A: Vanino (VANINO) RUSSIA

Vessel B: Korsakov (KORSAKOV) RUSSIA

Minimum Distance: 13 meters
Average Distance: 14 meters
Duration: 2h 27m
Period: 2026-10-25T07:40:38+00:00 to 2026-10-25T10:08:06+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga Terminal Complex

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 13m, avg 14m) for 148 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 Ust-Luga Terminal Complex, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	25/25	Min distance 13m, avg 14m
Duration	25/25	Duration 148 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±1m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga Terminal Complex

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-25T12:00:01.574107+00:00

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273331620,
        "imo": 8724779,
        "name": "VANINO",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273353940,
        "imo": 8724793,
        "name": "KORSAKOV",
        "flag": "RUSSIA"
    },
    "min_distance_m": 12.5999999999999996447286321199499070644378662109375,
    "avg_distance_m": 14.0999999999999996447286321199499070644378662109375,
    "distance_consistency_m": 0.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 147.5,
    "overlap_duration_s": 8848,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T07:40:38+00:00",
        "end": "2026-10-25T10:08:06+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 13m, avg 14m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 148 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga Terminal Complex"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 13m, avg 14m) for 148 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 Ust-Luga Terminal Complex, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 59.77196699999999651709003956057131290435791015625,
            "lon": 28.443514900000000267255018115974962711334228515625
        },
        "time_window": {
            "start_ts": "2026-10-25T07:40:38+00:00",
            "end_ts": "2026-10-25T10:08:06+00:00"
        },
        "searched_at": "2026-10-25T12:00:01.574107+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 25, 2026 07:01 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 6h 27m
Data Points: 43 AIS positions
Period: 2026-10-25T07:54:24+00:00 to 2026-10-25T14:22:05+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 387.69999999999998863131622783839702606201171875,
    "points_in_zone": 43,
    "first_point": {
        "ts": "2026-10-25T07:54:24+00:00",
        "lat": 59.77201670000000177651600097306072711944580078125,
        "lon": 28.443426699999999840429154573939740657806396484375
    },
    "last_point": {
        "ts": "2026-10-25T14:22:05+00:00",
        "lat": 59.77199499999999687815943616442382335662841796875,
        "lon": 28.4434083000000015317709767259657382965087890625
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 25, 2026 07:01 UTC 75.0%

Duration: 6h 27m
Radius: 4 meters
Data Points: 43 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 3.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 387.69999999999998863131622783839702606201171875,
    "points": 43,
    "centroid": {
        "lat": 59.77199542558141587278441875241696834564208984375,
        "lon": 28.4434159651162730142459622584283351898193359375
    },
    "bbox": {
        "min_lat": 59.77196169999999852961991564370691776275634765625,
        "min_lon": 28.443381699999999767669578432105481624603271484375,
        "max_lat": 59.7720233000000007450580596923828125,
        "max_lon": 28.443445000000000533191268914379179477691650390625
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 25, 2026 06:43 UTC 75.0%

Duration: 6h 34m
Radius: 4 meters
Data Points: 46 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 4.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 394.80000000000001136868377216160297393798828125,
    "points": 46,
    "centroid": {
        "lat": 59.77199989130434687467641197144985198974609375,
        "lon": 28.44341619347824234864674508571624755859375
    },
    "bbox": {
        "min_lat": 59.77196169999999852961991564370691776275634765625,
        "min_lon": 28.443381699999999767669578432105481624603271484375,
        "max_lat": 59.7720233000000007450580596923828125,
        "max_lon": 28.4434432999999984303940436802804470062255859375
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 25, 2026 06:43 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 6h 34m
Data Points: 46 AIS positions
Period: 2026-10-25T06:43:55+00:00 to 2026-10-25T13:18:45+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 394.80000000000001136868377216160297393798828125,
    "points_in_zone": 46,
    "first_point": {
        "ts": "2026-10-25T06:43:55+00:00",
        "lat": 59.77200669999999860237949178554117679595947265625,
        "lon": 28.44342999999999932470018393360078334808349609375
    },
    "last_point": {
        "ts": "2026-10-25T13:18:45+00:00",
        "lat": 59.77199499999999687815943616442382335662841796875,
        "lon": 28.44341670000000021900632418692111968994140625
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 25, 2026 05:02 UTC 75.0%

Duration: 6h 34m
Radius: 4 meters
Data Points: 35 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 3.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 394.3999999999999772626324556767940521240234375,
    "points": 35,
    "centroid": {
        "lat": 59.77201038285713963205125764943659305572509765625,
        "lon": 28.443419334285703570230907644145190715789794921875
    },
    "bbox": {
        "min_lat": 59.771981699999997772465576417744159698486328125,
        "min_lon": 28.44338499999999925194060779176652431488037109375,
        "max_lat": 59.7720417000000026064299163408577442169189453125,
        "max_lon": 28.4434432999999984303940436802804470062255859375
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 25, 2026 05:02 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 6h 34m
Data Points: 35 AIS positions
Period: 2026-10-25T05:02:04+00:00 to 2026-10-25T11:36:25+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 394.3999999999999772626324556767940521240234375,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-10-25T05:02:04+00:00",
        "lat": 59.7720417000000026064299163408577442169189453125,
        "lon": 28.443413299999999566125552519224584102630615234375
    },
    "last_point": {
        "ts": "2026-10-25T11:36:25+00:00",
        "lat": 59.77198829999999674100763513706624507904052734375,
        "lon": 28.44342329999999918754838290624320507049560546875
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 25, 2026 04:51 UTC 75.0%

Duration: 6h 32m
Radius: 4 meters
Data Points: 36 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 3.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 392.69999999999998863131622783839702606201171875,
    "points": 36,
    "centroid": {
        "lat": 59.772011577777760749086155556142330169677734375,
        "lon": 28.443418244444441000950973830185830593109130859375
    },
    "bbox": {
        "min_lat": 59.771981699999997772465576417744159698486328125,
        "min_lon": 28.44338499999999925194060779176652431488037109375,
        "max_lat": 59.7720417000000026064299163408577442169189453125,
        "max_lon": 28.4434432999999984303940436802804470062255859375
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 25, 2026 04:51 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 6h 32m
Data Points: 36 AIS positions
Period: 2026-10-25T04:51:13+00:00 to 2026-10-25T11:23:54+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 392.69999999999998863131622783839702606201171875,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-10-25T04:51:13+00:00",
        "lat": 59.77201500000000322643245453946292400360107421875,
        "lon": 28.443406700000000597583493799902498722076416015625
    },
    "last_point": {
        "ts": "2026-10-25T11:23:54+00:00",
        "lat": 59.77199329999999832807588973082602024078369140625,
        "lon": 28.44342830000000077461663750000298023223876953125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 24, 2026 08:13 UTC 75.0%

Duration: 1h 39m
Radius: 3 meters
Data Points: 19 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 2.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 99,
    "points": 19,
    "centroid": {
        "lat": 59.7719985157894626581764896400272846221923828125,
        "lon": 28.443427626315784806365627446211874485015869140625
    },
    "bbox": {
        "min_lat": 59.771981699999997772465576417744159698486328125,
        "min_lon": 28.443394999999998873363438178785145282745361328125,
        "max_lat": 59.77202170000000336358425556682050228118896484375,
        "max_lon": 28.44344830000000001746229827404022216796875
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 24, 2026 08:13 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 1h 39m
Data Points: 19 AIS positions
Period: 2026-10-24T08:13:48+00:00 to 2026-10-24T09:52:49+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 99,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-10-24T08:13:48+00:00",
        "lat": 59.77201000000000163936419994570314884185791015625,
        "lon": 28.443431700000001427497409167699515819549560546875
    },
    "last_point": {
        "ts": "2026-10-24T09:52:49+00:00",
        "lat": 59.77198829999999674100763513706624507904052734375,
        "lon": 28.44342329999999918754838290624320507049560546875
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 24, 2026 07:02 UTC 75.0%

Duration: 2h 50m
Radius: 4 meters
Data Points: 27 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 3.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 170.5,
    "points": 27,
    "centroid": {
        "lat": 59.77200376666667835934276808984577655792236328125,
        "lon": 28.443422099999995822372511611320078372955322265625
    },
    "bbox": {
        "min_lat": 59.771981699999997772465576417744159698486328125,
        "min_lon": 28.44338499999999925194060779176652431488037109375,
        "max_lat": 59.772030000000000882209860719740390777587890625,
        "max_lon": 28.44344830000000001746229827404022216796875
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 24, 2026 07:02 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 2h 50m
Data Points: 27 AIS positions
Period: 2026-10-24T07:02:17+00:00 to 2026-10-24T09:52:49+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 170.5,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-10-24T07:02:17+00:00",
        "lat": 59.77201670000000177651600097306072711944580078125,
        "lon": 28.443426699999999840429154573939740657806396484375
    },
    "last_point": {
        "ts": "2026-10-24T09:52:49+00:00",
        "lat": 59.77198829999999674100763513706624507904052734375,
        "lon": 28.44342329999999918754838290624320507049560546875
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 24, 2026 06:03 UTC 75.0%

Duration: 3h 49m
Radius: 3 meters
Data Points: 36 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 229.5,
    "points": 36,
    "centroid": {
        "lat": 59.7720086111111186255584470927715301513671875,
        "lon": 28.443419305555554643660798319615423679351806640625
    },
    "bbox": {
        "min_lat": 59.771981699999997772465576417744159698486328125,
        "min_lon": 28.443381699999999767669578432105481624603271484375,
        "max_lat": 59.77203829999999840083546587266027927398681640625,
        "max_lon": 28.44344830000000001746229827404022216796875
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 24, 2026 06:03 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 3h 49m
Data Points: 36 AIS positions
Period: 2026-10-24T06:03:17+00:00 to 2026-10-24T09:52:49+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 229.5,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-10-24T06:03:17+00:00",
        "lat": 59.77201000000000163936419994570314884185791015625,
        "lon": 28.443381699999999767669578432105481624603271484375
    },
    "last_point": {
        "ts": "2026-10-24T09:52:49+00:00",
        "lat": 59.77198829999999674100763513706624507904052734375,
        "lon": 28.44342329999999918754838290624320507049560546875
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Ust-Luga Terminal Complex Oct 24, 2026 05:53 UTC 85/100

Vessel A: Vanino (VANINO) RUSSIA

Vessel B: Korsakov (KORSAKOV) RUSSIA

Minimum Distance: 14 meters
Average Distance: 15 meters
Duration: 1h 18m
Period: 2026-10-24T05:53:58+00:00 to 2026-10-24T07:11:58+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga Terminal Complex

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 14m, avg 14m) for 78 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 Ust-Luga Terminal Complex, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	25/25	Min distance 14m, avg 14m
Duration	15/25	Duration 78 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±1m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga Terminal Complex

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-24T07:30:01.838869+00:00

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273331620,
        "imo": 8724779,
        "name": "VANINO",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273353940,
        "imo": 8724793,
        "name": "KORSAKOV",
        "flag": "RUSSIA"
    },
    "min_distance_m": 13.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 14.5,
    "distance_consistency_m": 0.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 78,
    "overlap_duration_s": 4680,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-24T05:53:58+00:00",
        "end": "2026-10-24T07:11:58+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 14m, avg 14m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 78 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga Terminal Complex"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 14m, avg 14m) for 78 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 Ust-Luga Terminal Complex, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 59.7719694000000032474417821504175662994384765625,
            "lon": 28.44349770000000177105903276242315769195556640625
        },
        "time_window": {
            "start_ts": "2026-10-24T05:53:58+00:00",
            "end_ts": "2026-10-24T07:11:58+00:00"
        },
        "searched_at": "2026-10-24T07:30:01.838869+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 24, 2026 05:44 UTC 75.0%

Duration: 4h 7m
Radius: 3 meters
Data Points: 38 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 247.80000000000001136868377216160297393798828125,
    "points": 38,
    "centroid": {
        "lat": 59.77200898947370433234027586877346038818359375,
        "lon": 28.44341886052631451775596360675990581512451171875
    },
    "bbox": {
        "min_lat": 59.771981699999997772465576417744159698486328125,
        "min_lon": 28.443381699999999767669578432105481624603271484375,
        "max_lat": 59.77203829999999840083546587266027927398681640625,
        "max_lon": 28.44344830000000001746229827404022216796875
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 24, 2026 05:44 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 4h 7m
Data Points: 38 AIS positions
Period: 2026-10-24T05:44:58+00:00 to 2026-10-24T09:52:49+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 247.80000000000001136868377216160297393798828125,
    "points_in_zone": 38,
    "first_point": {
        "ts": "2026-10-24T05:44:58+00:00",
        "lat": 59.77200830000000308928065351210534572601318359375,
        "lon": 28.4434049999999984947862685658037662506103515625
    },
    "last_point": {
        "ts": "2026-10-24T09:52:49+00:00",
        "lat": 59.77198829999999674100763513706624507904052734375,
        "lon": 28.44342329999999918754838290624320507049560546875
    }
}

Methodology: 2026.01.18

Sts Ust-Luga Terminal Complex Oct 23, 2026 15:10 UTC 80/100

Vessel A: Korsakov (KORSAKOV) RUSSIA

Vessel B: Vanino (VANINO) RUSSIA

Minimum Distance: 14 meters
Average Distance: 14 meters
Duration: 50 minutes
Period: 2026-10-23T15:10:45+00:00 to 2026-10-23T16:01:25+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga Terminal Complex

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (KORSAKOV and VANINO) maintained close proximity (min 14m, avg 14m) for 51 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga Terminal Complex, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	25/25	Min distance 14m, avg 14m
Duration	10/25	Duration 51 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±0m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273353940,
        "imo": 8724793,
        "name": "KORSAKOV",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273331620,
        "imo": 8724779,
        "name": "VANINO",
        "flag": "RUSSIA"
    },
    "min_distance_m": 13.800000000000000710542735760100185871124267578125,
    "avg_distance_m": 14.4000000000000003552713678800500929355621337890625,
    "distance_consistency_m": 0.5,
    "duration_minutes": 50.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 3040,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-23T15:10:45+00:00",
        "end": "2026-10-23T16:01:25+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 14m, avg 14m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 51 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b10m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga Terminal Complex"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (KORSAKOV and VANINO) maintained close proximity (min 14m, avg 14m) for 51 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga Terminal Complex, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 23, 2026 15:04 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 1h 28m
Data Points: 14 AIS positions
Period: 2026-10-23T15:04:15+00:00 to 2026-10-23T16:32:14+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 88,
    "points_in_zone": 14,
    "first_point": {
        "ts": "2026-10-23T15:04:15+00:00",
        "lat": 59.772013299999997570921550504863262176513671875,
        "lon": 28.443388299999998736211637151427567005157470703125
    },
    "last_point": {
        "ts": "2026-10-23T16:32:14+00:00",
        "lat": 59.77199170000000094660208560526371002197265625,
        "lon": 28.443388299999998736211637151427567005157470703125
    }
}

Methodology: 2026.01.18

Sts🛰️? Ust-Luga Terminal Complex Oct 23, 2026 14:19 UTC 90/100

Vessel A: Vanino (VANINO) RUSSIA

Vessel B: Korsakov (KORSAKOV) RUSSIA

Minimum Distance: 14 meters
Average Distance: 15 meters
Duration: 1h 36m
Period: 2026-10-23T14:19:06+00:00 to 2026-10-23T15:55:06+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga Terminal Complex

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 14m, avg 15m) for 96 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 Ust-Luga Terminal Complex, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	25/25	Min distance 14m, avg 15m
Duration	20/25	Duration 96 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±1m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga Terminal Complex

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1C_IW_GRDH_1SDV_20261023T041640_20261023T041705_010007_013F75_7322_COG • Acquired: 2026-10-23T04:16:40.997613Z • Platform: sentinel-1c

Click image to view full size

Searched: 2026-10-23T20:15:04.669204+00:00

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273331620,
        "imo": 8724779,
        "name": "VANINO",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273353940,
        "imo": 8724793,
        "name": "KORSAKOV",
        "flag": "RUSSIA"
    },
    "min_distance_m": 13.9000000000000003552713678800500929355621337890625,
    "avg_distance_m": 14.5999999999999996447286321199499070644378662109375,
    "distance_consistency_m": 1,
    "duration_minutes": 96,
    "overlap_duration_s": 5760,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-23T14:19:06+00:00",
        "end": "2026-10-23T15:55:06+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 14m, avg 15m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 96 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga Terminal Complex"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 14m, avg 15m) for 96 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 Ust-Luga Terminal Complex, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.77196169999999852961991564370691776275634765625,
            "lon": 28.44349989999999905876393313519656658172607421875
        },
        "time_window": {
            "start_ts": "2026-10-23T14:19:06+00:00",
            "end_ts": "2026-10-23T15:55:06+00:00"
        },
        "searched_at": "2026-10-23T20:15:04.669204+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20261023T041640_20261023T041705_010007_013F75_7322_COG",
        "scene_datetime": "2026-10-23T04:16:40.997613Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 28.5112570000000005165929906070232391357421875,
            "min_lat": 58.78308100000000280260792351327836513519287109375,
            "max_lon": 33.73054499999999933379513095133006572723388671875,
            "max_lat": 60.709418999999996913174982182681560516357421875
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/10\/event_1559091_thumbnail_20261023201509.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/10\/event_1559091_thumbnail_20261023201509.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 23, 2026 14:01 UTC 75.0%

Duration: 2h 31m
Radius: 2 meters
Data Points: 19 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 2.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 151,
    "points": 19,
    "centroid": {
        "lat": 59.77200008421052501716985716484487056732177734375,
        "lon": 28.443393410526322639952923054806888103485107421875
    },
    "bbox": {
        "min_lat": 59.7719799999999992223820299841463565826416015625,
        "min_lon": 28.4433700000000015961632016114890575408935546875,
        "max_lat": 59.77201500000000322643245453946292400360107421875,
        "max_lon": 28.44342329999999918754838290624320507049560546875
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 23, 2026 14:01 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 2h 31m
Data Points: 19 AIS positions
Period: 2026-10-23T14:01:14+00:00 to 2026-10-23T16:32:14+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 151,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-10-23T14:01:14+00:00",
        "lat": 59.77201500000000322643245453946292400360107421875,
        "lon": 28.44339169999999938909240881912410259246826171875
    },
    "last_point": {
        "ts": "2026-10-23T16:32:14+00:00",
        "lat": 59.77199170000000094660208560526371002197265625,
        "lon": 28.443388299999998736211637151427567005157470703125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 23, 2026 13:10 UTC 75.0%

Duration: 3h 21m
Radius: 3 meters
Data Points: 26 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 2.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 201.5,
    "points": 26,
    "centroid": {
        "lat": 59.77200390769230153864555177278816699981689453125,
        "lon": 28.443396330769228796953029814176261425018310546875
    },
    "bbox": {
        "min_lat": 59.7719799999999992223820299841463565826416015625,
        "min_lon": 28.443368299999999493365976377390325069427490234375,
        "max_lat": 59.7720249999999992951416061259806156158447265625,
        "max_lon": 28.443438300000000396039467887021601200103759765625
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 23, 2026 13:10 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 3h 21m
Data Points: 26 AIS positions
Period: 2026-10-23T13:10:45+00:00 to 2026-10-23T16:32:14+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 201.5,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-10-23T13:10:45+00:00",
        "lat": 59.77200830000000308928065351210534572601318359375,
        "lon": 28.443438300000000396039467887021601200103759765625
    },
    "last_point": {
        "ts": "2026-10-23T16:32:14+00:00",
        "lat": 59.77199170000000094660208560526371002197265625,
        "lon": 28.443388299999998736211637151427567005157470703125
    }
}

Methodology: 2026.01.18

Sts Ust-Luga Terminal Complex Oct 23, 2026 13:10 UTC 95/100

Vessel A: Vanino (VANINO) RUSSIA

Vessel B: Korsakov (KORSAKOV) RUSSIA

Minimum Distance: 14 meters
Average Distance: 15 meters
Duration: 2h 33m
Period: 2026-10-23T13:22:07+00:00 to 2026-10-23T15:55:06+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga Terminal Complex

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 14m, avg 15m) for 153 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 Ust-Luga Terminal Complex, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	25/25	Min distance 14m, avg 15m
Duration	25/25	Duration 153 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±2m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273331620,
        "imo": 8724779,
        "name": "VANINO",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273353940,
        "imo": 8724793,
        "name": "KORSAKOV",
        "flag": "RUSSIA"
    },
    "min_distance_m": 13.9000000000000003552713678800500929355621337890625,
    "avg_distance_m": 15.300000000000000710542735760100185871124267578125,
    "distance_consistency_m": 1.5,
    "duration_minutes": 153,
    "overlap_duration_s": 9179,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-23T13:22:07+00:00",
        "end": "2026-10-23T15:55:06+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 14m, avg 15m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 153 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga Terminal Complex"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 14m, avg 15m) for 153 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 Ust-Luga Terminal Complex, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Ust-Luga Terminal Complex Oct 23, 2026 12:56 UTC 95/100

Vessel A: Vanino (VANINO) RUSSIA

Vessel B: Korsakov (KORSAKOV) RUSSIA

Minimum Distance: 13 meters
Average Distance: 15 meters
Duration: 3h 48m
Period: 2026-10-23T12:07:06+00:00 to 2026-10-23T15:55:06+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga Terminal Complex

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 13m, avg 15m) for 228 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga Terminal Complex, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	25/25	Min distance 13m, avg 15m
Duration	25/25	Duration 228 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±1m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273331620,
        "imo": 8724779,
        "name": "VANINO",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273353940,
        "imo": 8724793,
        "name": "KORSAKOV",
        "flag": "RUSSIA"
    },
    "min_distance_m": 13.199999999999999289457264239899814128875732421875,
    "avg_distance_m": 14.699999999999999289457264239899814128875732421875,
    "distance_consistency_m": 1.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 228,
    "overlap_duration_s": 13680,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-23T12:07:06+00:00",
        "end": "2026-10-23T15:55:06+00:00"
    },
    "points_count": {
        "vessel_a": 15,
        "vessel_b": 15
    },
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 13m, avg 15m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 228 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga Terminal Complex"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 13m, avg 15m) for 228 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga Terminal Complex, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 23, 2026 12:05 UTC 75.0%

Duration: 4h 26m
Radius: 3 meters
Data Points: 31 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 266.30000000000001136868377216160297393798828125,
    "points": 31,
    "centroid": {
        "lat": 59.772001880645149185511399991810321807861328125,
        "lon": 28.443399770967740636251619434915482997894287109375
    },
    "bbox": {
        "min_lat": 59.77197670000000329082467942498624324798583984375,
        "min_lon": 28.443368299999999493365976377390325069427490234375,
        "max_lat": 59.7720249999999992951416061259806156158447265625,
        "max_lon": 28.443438300000000396039467887021601200103759765625
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 23, 2026 12:05 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 4h 26m
Data Points: 31 AIS positions
Period: 2026-10-23T12:05:54+00:00 to 2026-10-23T16:32:14+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 266.30000000000001136868377216160297393798828125,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-10-23T12:05:54+00:00",
        "lat": 59.771978300000000672298483550548553466796875,
        "lon": 28.44343500000000091176843852736055850982666015625
    },
    "last_point": {
        "ts": "2026-10-23T16:32:14+00:00",
        "lat": 59.77199170000000094660208560526371002197265625,
        "lon": 28.443388299999998736211637151427567005157470703125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 23, 2026 11:22 UTC 75.0%

Duration: 5h 9m
Radius: 4 meters
Data Points: 37 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 3.5,
    "duration_minutes": 309.69999999999998863131622783839702606201171875,
    "points": 37,
    "centroid": {
        "lat": 59.771999099999987947740009985864162445068359375,
        "lon": 28.44340503513512885547243058681488037109375
    },
    "bbox": {
        "min_lat": 59.77197670000000329082467942498624324798583984375,
        "min_lon": 28.443368299999999493365976377390325069427490234375,
        "max_lat": 59.7720249999999992951416061259806156158447265625,
        "max_lon": 28.4434566999999987046976457349956035614013671875
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 23, 2026 11:22 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 5h 9m
Data Points: 37 AIS positions
Period: 2026-10-23T11:22:34+00:00 to 2026-10-23T16:32:14+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 309.69999999999998863131622783839702606201171875,
    "points_in_zone": 37,
    "first_point": {
        "ts": "2026-10-23T11:22:34+00:00",
        "lat": 59.771985000000000809450284577906131744384765625,
        "lon": 28.4434566999999987046976457349956035614013671875
    },
    "last_point": {
        "ts": "2026-10-23T16:32:14+00:00",
        "lat": 59.77199170000000094660208560526371002197265625,
        "lon": 28.443388299999998736211637151427567005157470703125
    }
}

Methodology: 2026.01.18

Sts Ust-Luga Terminal Complex Oct 23, 2026 11:22 UTC 95/100

Vessel A: Vanino (VANINO) RUSSIA

Vessel B: Korsakov (KORSAKOV) RUSSIA

Minimum Distance: 13 meters
Average Distance: 15 meters
Duration: 4h 15m
Period: 2026-10-23T11:40:06+00:00 to 2026-10-23T15:55:06+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga Terminal Complex

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 13m, avg 15m) for 255 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 Ust-Luga Terminal Complex, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	25/25	Min distance 13m, avg 15m
Duration	25/25	Duration 255 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±1m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273331620,
        "imo": 8724779,
        "name": "VANINO",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273353940,
        "imo": 8724793,
        "name": "KORSAKOV",
        "flag": "RUSSIA"
    },
    "min_distance_m": 13.199999999999999289457264239899814128875732421875,
    "avg_distance_m": 14.5999999999999996447286321199499070644378662109375,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 255,
    "overlap_duration_s": 15300,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-23T11:40:06+00:00",
        "end": "2026-10-23T15:55:06+00:00"
    },
    "points_count": {
        "vessel_a": 18,
        "vessel_b": 18
    },
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 13m, avg 15m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 255 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga Terminal Complex"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 13m, avg 15m) for 255 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 Ust-Luga Terminal Complex, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Ust-Luga Terminal Complex Oct 23, 2026 10:50 UTC 95/100

Vessel A: Vanino (VANINO) RUSSIA

Vessel B: Korsakov (KORSAKOV) RUSSIA

Minimum Distance: 13 meters
Average Distance: 15 meters
Duration: 5h 6m
Period: 2026-10-23T10:25:06+00:00 to 2026-10-23T15:31:06+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga Terminal Complex

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 13m, avg 15m) for 306 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 Ust-Luga Terminal Complex, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	25/25	Min distance 13m, avg 15m
Duration	25/25	Duration 306 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±1m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273331620,
        "imo": 8724779,
        "name": "VANINO",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273353940,
        "imo": 8724793,
        "name": "KORSAKOV",
        "flag": "RUSSIA"
    },
    "min_distance_m": 13.199999999999999289457264239899814128875732421875,
    "avg_distance_m": 14.5999999999999996447286321199499070644378662109375,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 306,
    "overlap_duration_s": 18360,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-23T10:25:06+00:00",
        "end": "2026-10-23T15:31:06+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 13m, avg 15m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 306 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga Terminal Complex"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VANINO and KORSAKOV) maintained close proximity (min 13m, avg 15m) for 306 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 Ust-Luga Terminal Complex, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga Terminal Complex Oct 23, 2026 10:02 UTC 75.0%

Duration: 6h 30m
Radius: 4 meters
Data Points: 46 AIS positions
Centroid: 59.7720, 28.4434
Zone: Ust-Luga Terminal Complex

Show Raw Evidence JSON

{
    "radius_m": 3.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 390,
    "points": 46,
    "centroid": {
        "lat": 59.77199724565218019733947585336863994598388671875,
        "lon": 28.44341191086956399658447480760514736175537109375
    },
    "bbox": {
        "min_lat": 59.77197670000000329082467942498624324798583984375,
        "min_lon": 28.443368299999999493365976377390325069427490234375,
        "max_lat": 59.7720249999999992951416061259806156158447265625,
        "max_lon": 28.4434566999999987046976457349956035614013671875
    },
    "zone_id": "russia_ust_luga"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex Oct 23, 2026 10:02 UTC 80.0%

Zone: Ust-Luga Terminal Complex
Duration: 6h 30m
Data Points: 46 AIS positions
Period: 2026-10-23T10:02:14+00:00 to 2026-10-23T16:32:14+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 390,
    "points_in_zone": 46,
    "first_point": {
        "ts": "2026-10-23T10:02:14+00:00",
        "lat": 59.77199829999999991514414432458579540252685546875,
        "lon": 28.443455000000000154614099301397800445556640625
    },
    "last_point": {
        "ts": "2026-10-23T16:32:14+00:00",
        "lat": 59.77199170000000094660208560526371002197265625,
        "lon": 28.443388299999998736211637151427567005157470703125
    }
}

Methodology: 2026.01.18

AIS Status

Under way using engine

Speed 0.00 kn

Course 0.00°

Heading 224°

Updated 28 minutes ago

Korsakov

IMO 8724793

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