DMITRIY RULEVSKIY

{
    "vessel_a": {
        "mmsi": 273318420,
        "imo": 8411463,
        "name": "ABIGAIL",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "min_distance_m": 96.400000000000005684341886080801486968994140625,
    "avg_distance_m": 99.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 100.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 6041,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-25T03:15:54+00:00",
        "end": "2026-08-25T04:56:35+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 96m, avg 99m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 101 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\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ABIGAIL and DMITRIY RULEVSKIY) maintained close proximity (min 96m, avg 99m) for 101 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\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.88199329999999775964170112274587154388427734375,
            "lon": 30.225830599999998327120920293964445590972900390625
        },
        "time_window": {
            "start_ts": "2026-08-25T03:15:54+00:00",
            "end_ts": "2026-08-25T04:56:35+00:00"
        },
        "searched_at": "2026-08-25T09:30:08.071715+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG",
        "scene_datetime": "2026-08-24T15:31:22.924579Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 29.00003099999999989222487783990800380706787109375,
            "min_lat": 59.5085260000000033642209018580615520477294921875,
            "max_lon": 34.328518000000002530214260332286357879638671875,
            "max_lat": 61.43686699999999945021045277826488018035888671875
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1122315_thumbnail_20260825093011.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1122315_thumbnail_20260825093011.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Aug 25, 2026 03:06 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 5h 40m
Data Points: 30 AIS positions
Period: 2026-08-25T03:06:11+00:00 to 2026-08-25T08:46:10+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 340,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-08-25T03:06:11+00:00",
        "lat": 59.8820683000000002493834472261369228363037109375,
        "lon": 30.2249683000000004540197551250457763671875
    },
    "last_point": {
        "ts": "2026-08-25T08:46:10+00:00",
        "lat": 59.882073300000001836451701819896697998046875,
        "lon": 30.224848300000001444232111680321395397186279296875
    }
}

Aug 25, 2026 03:06 UTC 75.0% ▼

Duration: 5h 40m
Radius: 177 meters
Data Points: 30 AIS positions
Centroid: 59.8818, 30.2252
Zone: Ust-Luga/St. Petersburg Approach

{
    "radius_m": 176.80000000000001136868377216160297393798828125,
    "duration_minutes": 340,
    "points": 30,
    "centroid": {
        "lat": 59.88179360333334244614889030344784259796142578125,
        "lon": 30.225208553333335004253967781551182270050048828125
    },
    "bbox": {
        "min_lat": 59.8803683000000006586560630239546298980712890625,
        "min_lon": 30.2247966999999988502167980186641216278076171875,
        "max_lat": 59.88212829999999797792042954824864864349365234375,
        "max_lon": 30.2275632999999999128704075701534748077392578125
    },
    "zone_id": "russia_ust_luga_approach"
}

Aug 25, 2026 02:40 UTC 95/100 ▼

Vessel A: IMO 8411463 (ABIGAIL) RUSSIA

Vessel B: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Minimum Distance: 96 meters
Average Distance: 100 meters
Duration: 2h 15m
Period: 2026-08-25T02:40:44+00:00 to 2026-08-25T04:56:35+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (ABIGAIL and DMITRIY RULEVSKIY) maintained close proximity (min 96m, avg 100m) for 136 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/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	25/25	Min distance 96m, avg 100m
Duration	25/25	Duration 136 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/St. Petersburg Approach

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG • Acquired: 2026-08-24T15:31:22.924579Z • Platform: sentinel-1c

Click image to view full size

Searched: 2026-08-25T09:15:10.075452+00:00

{
    "vessel_a": {
        "mmsi": 273318420,
        "imo": 8411463,
        "name": "ABIGAIL",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "min_distance_m": 96.400000000000005684341886080801486968994140625,
    "avg_distance_m": 100.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 2.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 135.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 8151,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-25T02:40:44+00:00",
        "end": "2026-08-25T04:56:35+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 96m, avg 100m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 136 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\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ABIGAIL and DMITRIY RULEVSKIY) maintained close proximity (min 96m, avg 100m) for 136 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\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.88199670000000196523615159094333648681640625,
            "lon": 30.225822699999998377506926772184669971466064453125
        },
        "time_window": {
            "start_ts": "2026-08-25T02:40:44+00:00",
            "end_ts": "2026-08-25T04:56:35+00:00"
        },
        "searched_at": "2026-08-25T09:15:10.075452+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG",
        "scene_datetime": "2026-08-24T15:31:22.924579Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 29.00003099999999989222487783990800380706787109375,
            "min_lat": 59.5085260000000033642209018580615520477294921875,
            "max_lon": 34.328518000000002530214260332286357879638671875,
            "max_lat": 61.43686699999999945021045277826488018035888671875
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1122283_thumbnail_20260825091516.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1122283_thumbnail_20260825091516.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Aug 25, 2026 02:22 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 24m
Data Points: 36 AIS positions
Period: 2026-08-25T02:22:11+00:00 to 2026-08-25T08:46:10+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 384,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-08-25T02:22:11+00:00",
        "lat": 59.8820716999999973495505400933325290679931640625,
        "lon": 30.224928299999998415614754776470363140106201171875
    },
    "last_point": {
        "ts": "2026-08-25T08:46:10+00:00",
        "lat": 59.882073300000001836451701819896697998046875,
        "lon": 30.224848300000001444232111680321395397186279296875
    }
}

Aug 25, 2026 02:22 UTC 75.0% ▼

Duration: 6h 24m
Radius: 182 meters
Data Points: 36 AIS positions
Centroid: 59.8818, 30.2252
Zone: Ust-Luga/St. Petersburg Approach

{
    "radius_m": 182.19999999999998863131622783839702606201171875,
    "duration_minutes": 384,
    "points": 36,
    "centroid": {
        "lat": 59.881840733333348225642112083733081817626953125,
        "lon": 30.22516421111112094877171330153942108154296875
    },
    "bbox": {
        "min_lat": 59.8803683000000006586560630239546298980712890625,
        "min_lon": 30.2247966999999988502167980186641216278076171875,
        "max_lat": 59.88212829999999797792042954824864864349365234375,
        "max_lon": 30.2275632999999999128704075701534748077392578125
    },
    "zone_id": "russia_ust_luga_approach"
}

Aug 25, 2026 02:13 UTC 90/100 ▼

Vessel A: Solstraum (SOLSTRAUM) Russia

Vessel B: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Minimum Distance: 163 meters
Average Distance: 167 meters
Duration: 4h 3m
Period: 2026-08-25T02:13:11+00:00 to 2026-08-25T06:16:12+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (SOLSTRAUM and DMITRIY RULEVSKIY) maintained close proximity (min 162m, avg 167m) for 243 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/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	20/25	Min distance 162m, avg 167m
Duration	25/25	Duration 243 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±4m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273291710,
        "imo": 9157014,
        "name": "SOLSTRAUM",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "min_distance_m": 162.5,
    "avg_distance_m": 167.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 3.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 243,
    "overlap_duration_s": 14581,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-25T02:13:11+00:00",
        "end": "2026-08-25T06:16:12+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 162m, avg 167m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 243 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SOLSTRAUM and DMITRIY RULEVSKIY) maintained close proximity (min 162m, avg 167m) for 243 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\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts🛰️? Ust-Luga/St. Petersburg Approach

Aug 25, 2026 01:19 UTC 85/100 ▼

Vessel A: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Vessel B: Solstraum (SOLSTRAUM) Russia

Minimum Distance: 158 meters
Average Distance: 165 meters
Duration: 1h 37m
Period: 2026-08-25T01:29:10+00:00 to 2026-08-25T03:06:11+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (DMITRIY RULEVSKIY and SOLSTRAUM) maintained close proximity (min 158m, avg 165m) for 97 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/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	20/25	Min distance 158m, avg 165m
Duration	20/25	Duration 97 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±4m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG • Acquired: 2026-08-24T15:31:22.924579Z • Platform: sentinel-1c

Click image to view full size

Searched: 2026-08-25T08:00:08.189335+00:00

{
    "vessel_a": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273291710,
        "imo": 9157014,
        "name": "SOLSTRAUM",
        "flag": "Russia"
    },
    "min_distance_m": 158.30000000000001136868377216160297393798828125,
    "avg_distance_m": 164.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 4.5,
    "duration_minutes": 97,
    "overlap_duration_s": 5821,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-25T01:29:10+00:00",
        "end": "2026-08-25T03:06:11+00:00"
    },
    "points_count": {
        "vessel_a": 13,
        "vessel_b": 13
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 158m, avg 165m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 97 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (DMITRIY RULEVSKIY and SOLSTRAUM) maintained close proximity (min 158m, avg 165m) for 97 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\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.88283419999999779292920720763504505157470703125,
            "lon": 30.224731999999999487727109226398169994354248046875
        },
        "time_window": {
            "start_ts": "2026-08-25T01:19:10+00:00",
            "end_ts": "2026-08-25T03:06:11+00:00"
        },
        "searched_at": "2026-08-25T08:00:08.189335+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG",
        "scene_datetime": "2026-08-24T15:31:22.924579Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 29.00003099999999989222487783990800380706787109375,
            "min_lat": 59.5085260000000033642209018580615520477294921875,
            "max_lon": 34.328518000000002530214260332286357879638671875,
            "max_lat": 61.43686699999999945021045277826488018035888671875
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1121818_thumbnail_20260825080013.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1121818_thumbnail_20260825080013.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Aug 25, 2026 01:15 UTC 95/100 ▼

Vessel A: IMO 8411463 (ABIGAIL) RUSSIA

Vessel B: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Minimum Distance: 96 meters
Average Distance: 100 meters
Duration: 3h 6m
Period: 2026-08-25T01:49:54+00:00 to 2026-08-25T04:56:35+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (ABIGAIL and DMITRIY RULEVSKIY) maintained close proximity (min 96m, avg 100m) for 187 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/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	25/25	Min distance 96m, avg 100m
Duration	25/25	Duration 187 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/St. Petersburg Approach

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273318420,
        "imo": 8411463,
        "name": "ABIGAIL",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "min_distance_m": 96.400000000000005684341886080801486968994140625,
    "avg_distance_m": 100.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 186.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 11201,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-25T01:49:54+00:00",
        "end": "2026-08-25T04:56:35+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 96m, avg 100m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 187 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\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ABIGAIL and DMITRIY RULEVSKIY) maintained close proximity (min 96m, avg 100m) for 187 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\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 25, 2026 01:15 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 31m
Data Points: 37 AIS positions
Period: 2026-08-25T01:53:49+00:00 to 2026-08-25T08:24:50+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 391,
    "points_in_zone": 37,
    "first_point": {
        "ts": "2026-08-25T01:53:49+00:00",
        "lat": 59.8821099999999972851583152078092098236083984375,
        "lon": 30.224945000000001726903064991347491741180419921875
    },
    "last_point": {
        "ts": "2026-08-25T08:24:50+00:00",
        "lat": 59.881945000000001755324774421751499176025390625,
        "lon": 30.2247966999999988502167980186641216278076171875
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Aug 25, 2026 01:15 UTC 75.0% ▼

Duration: 6h 31m
Radius: 183 meters
Data Points: 37 AIS positions
Centroid: 59.8818, 30.2252
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 182.900000000000005684341886080801486968994140625,
    "duration_minutes": 391,
    "points": 37,
    "centroid": {
        "lat": 59.881848508108106443614815361797809600830078125,
        "lon": 30.2251604486486513678755727596580982208251953125
    },
    "bbox": {
        "min_lat": 59.8803683000000006586560630239546298980712890625,
        "min_lon": 30.2247966999999988502167980186641216278076171875,
        "max_lat": 59.88212829999999797792042954824864864349365234375,
        "max_lon": 30.2275632999999999128704075701534748077392578125
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Sts🛰️? Ust-Luga/St. Petersburg Approach

Aug 25, 2026 00:49 UTC 75/100 ▼

Vessel A: Kord Arctic (KORD ARCTIC) RUSSIA

Vessel B: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Minimum Distance: 196 meters
Average Distance: 257 meters
Duration: 3h 31m
Period: 2026-08-25T00:49:04+00:00 to 2026-08-25T04:20:26+00:00
Vessel A Avg Speed: 0.6 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (KORD ARCTIC and DMITRIY RULEVSKIY) maintained close proximity (min 196m, avg 257m) for 211 minutes. Both vessels were slow-moving (avg speeds 0.6 and 0.0 knots). Moderate distance variation observed during the encounter. Event occurred in Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	20/25	Min distance 196m, avg 257m
Duration	25/25	Duration 211 minutes
Speed Stability	12/20	both very slow; somewhat variable speeds
Distance Consistency	8/15	Distance variance ±89m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG • Acquired: 2026-08-24T15:31:22.924579Z • Platform: sentinel-1c

Click image to view full size

Searched: 2026-08-25T06:45:14.084956+00:00

{
    "vessel_a": {
        "mmsi": 273386120,
        "imo": 9036272,
        "name": "KORD ARCTIC",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "min_distance_m": 196,
    "avg_distance_m": 257,
    "distance_consistency_m": 88.599999999999994315658113919198513031005859375,
    "duration_minutes": 211.400000000000005684341886080801486968994140625,
    "overlap_duration_s": 12682,
    "speed_a_avg": 0.59999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.63000000000000000444089209850062616169452667236328125,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.59999999999999997779553950749686919152736663818359375,
            "max_sog": 1.399999999999999911182158029987476766109466552734375
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-25T00:49:04+00:00",
        "end": "2026-08-25T04:20:26+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 196m, avg 257m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 211 minutes"
            },
            "speed_stability": {
                "score": 12,
                "max": 20,
                "detail": "both very slow; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 8,
                "max": 15,
                "detail": "Distance variance \u00b189m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (KORD ARCTIC and DMITRIY RULEVSKIY) maintained close proximity (min 196m, avg 257m) for 211 minutes. Both vessels were slow-moving (avg speeds 0.6 and 0.0 knots). Moderate distance variation observed during the encounter. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.88319119999999884385033510625362396240234375,
            "lon": 30.2246300999999988334820955060422420501708984375
        },
        "time_window": {
            "start_ts": "2026-08-25T00:49:04+00:00",
            "end_ts": "2026-08-25T04:20:26+00:00"
        },
        "searched_at": "2026-08-25T06:45:14.084956+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG",
        "scene_datetime": "2026-08-24T15:31:22.924579Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 29.00003099999999989222487783990800380706787109375,
            "min_lat": 59.5085260000000033642209018580615520477294921875,
            "max_lon": 34.328518000000002530214260332286357879638671875,
            "max_lat": 61.43686699999999945021045277826488018035888671875
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1121371_thumbnail_20260825064517.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1121371_thumbnail_20260825064517.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Aug 25, 2026 00:12 UTC 85/100 ▼

Vessel A: Solstraum (SOLSTRAUM) Russia

Vessel B: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Minimum Distance: 153 meters
Average Distance: 164 meters
Duration: 1h 53m
Period: 2026-08-25T00:12:11+00:00 to 2026-08-25T02:06:01+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (SOLSTRAUM and DMITRIY RULEVSKIY) maintained close proximity (min 152m, avg 164m) for 114 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	20/25	Min distance 152m, avg 164m
Duration	20/25	Duration 114 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±6m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG • Acquired: 2026-08-24T15:31:22.924579Z • Platform: sentinel-1c

Click image to view full size

Searched: 2026-08-25T07:00:02.358341+00:00

{
    "vessel_a": {
        "mmsi": 273291710,
        "imo": 9157014,
        "name": "SOLSTRAUM",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "min_distance_m": 152.5,
    "avg_distance_m": 164.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 5.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 113.7999999999999971578290569595992565155029296875,
    "overlap_duration_s": 6830,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-25T00:12:11+00:00",
        "end": "2026-08-25T02:06:01+00:00"
    },
    "points_count": {
        "vessel_a": 30,
        "vessel_b": 30
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 152m, avg 164m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 114 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SOLSTRAUM and DMITRIY RULEVSKIY) maintained close proximity (min 152m, avg 164m) for 114 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.8828266000000013491444406099617481231689453125,
            "lon": 30.224722700000000941145117394626140594482421875
        },
        "time_window": {
            "start_ts": "2026-08-25T00:12:11+00:00",
            "end_ts": "2026-08-25T02:06:01+00:00"
        },
        "searched_at": "2026-08-25T07:00:02.358341+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG",
        "scene_datetime": "2026-08-24T15:31:22.924579Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 29.00003099999999989222487783990800380706787109375,
            "min_lat": 59.5085260000000033642209018580615520477294921875,
            "max_lon": 34.328518000000002530214260332286357879638671875,
            "max_lat": 61.43686699999999945021045277826488018035888671875
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1121372_thumbnail_20260825070007.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1121372_thumbnail_20260825070007.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Aug 25, 2026 00:10 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 36m
Data Points: 39 AIS positions
Period: 2026-08-25T00:41:10+00:00 to 2026-08-25T07:18:01+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 396.8999999999999772626324556767940521240234375,
    "points_in_zone": 39,
    "first_point": {
        "ts": "2026-08-25T00:41:10+00:00",
        "lat": 59.882108299999998735074768774211406707763671875,
        "lon": 30.22493670000000065556378103792667388916015625
    },
    "last_point": {
        "ts": "2026-08-25T07:18:01+00:00",
        "lat": 59.88209169999999659239620086736977100372314453125,
        "lon": 30.224966699999999519832272198982536792755126953125
    }
}

Aug 25, 2026 00:10 UTC 75.0% ▼

Duration: 6h 36m
Radius: 13 meters
Data Points: 39 AIS positions
Centroid: 59.8821, 30.2249
Zone: Ust-Luga/St. Petersburg Approach

{
    "radius_m": 12.5,
    "duration_minutes": 396.8999999999999772626324556767940521240234375,
    "points": 39,
    "centroid": {
        "lat": 59.88208913846154501925411750562489032745361328125,
        "lon": 30.22494517692308590994798578321933746337890625
    },
    "bbox": {
        "min_lat": 59.88199329999999775964170112274587154388427734375,
        "min_lon": 30.224875000000000824229573481716215610504150390625,
        "max_lat": 59.8821999999999974306774674914777278900146484375,
        "max_lon": 30.225031699999998835437509114854037761688232421875
    },
    "zone_id": "russia_ust_luga_approach"
}

Aug 24, 2026 23:59 UTC 80/100 ▼

Vessel A: IMO 6920147 (ARCTICA) Russia

Vessel B: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Minimum Distance: 189 meters
Average Distance: 191 meters
Duration: 1h 25m
Period: 2026-08-24T23:59:32+00:00 to 2026-08-25T01:25:23+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ARCTICA and DMITRIY RULEVSKIY) maintained close proximity (min 189m, avg 191m) for 86 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/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	20/25	Min distance 189m, avg 191m
Duration	15/25	Duration 86 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/St. Petersburg Approach

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG • Acquired: 2026-08-24T15:31:22.924579Z • Platform: sentinel-1c

Click image to view full size

Searched: 2026-08-25T02:45:02.047430+00:00

{
    "vessel_a": {
        "mmsi": 273333320,
        "imo": 6920147,
        "name": "ARCTICA",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "min_distance_m": 188.80000000000001136868377216160297393798828125,
    "avg_distance_m": 191,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 85.7999999999999971578290569595992565155029296875,
    "overlap_duration_s": 5151,
    "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": "2026-08-24T23:59:32+00:00",
        "end": "2026-08-25T01:25:23+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 189m, avg 191m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 86 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\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ARCTICA and DMITRIY RULEVSKIY) maintained close proximity (min 189m, avg 191m) for 86 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\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.88175530000000179597918759100139141082763671875,
            "lon": 30.226518299999998617977325920946896076202392578125
        },
        "time_window": {
            "start_ts": "2026-08-24T23:59:32+00:00",
            "end_ts": "2026-08-25T01:25:23+00:00"
        },
        "searched_at": "2026-08-25T02:45:02.047430+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG",
        "scene_datetime": "2026-08-24T15:31:22.924579Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 29.00003099999999989222487783990800380706787109375,
            "min_lat": 59.5085260000000033642209018580615520477294921875,
            "max_lon": 34.328518000000002530214260332286357879638671875,
            "max_lat": 61.43686699999999945021045277826488018035888671875
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1119448_thumbnail_20260825024507.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1119448_thumbnail_20260825024507.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Aug 24, 2026 23:41 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 28m
Data Points: 36 AIS positions
Period: 2026-08-24T23:51:29+00:00 to 2026-08-25T06:20:11+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 388.69999999999998863131622783839702606201171875,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-08-24T23:51:29+00:00",
        "lat": 59.88208329999999790516085340641438961029052734375,
        "lon": 30.224965000000000969748725765384733676910400390625
    },
    "last_point": {
        "ts": "2026-08-25T06:20:11+00:00",
        "lat": 59.882080000000001973603502847254276275634765625,
        "lon": 30.224991700000000349746187566779553890228271484375
    }
}

Aug 24, 2026 23:41 UTC 75.0% ▼

Duration: 6h 28m
Radius: 13 meters
Data Points: 36 AIS positions
Centroid: 59.8821, 30.2249
Zone: Ust-Luga/St. Petersburg Approach

{
    "radius_m": 12.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 388.69999999999998863131622783839702606201171875,
    "points": 36,
    "centroid": {
        "lat": 59.882085966666664944568765349686145782470703125,
        "lon": 30.2249455611111130792778567411005496978759765625
    },
    "bbox": {
        "min_lat": 59.88199329999999775964170112274587154388427734375,
        "min_lon": 30.224888299999999929923433228395879268646240234375,
        "max_lat": 59.8821999999999974306774674914777278900146484375,
        "max_lon": 30.225020000000000663931132294237613677978515625
    },
    "zone_id": "russia_ust_luga_approach"
}

Aug 24, 2026 23:32 UTC 90/100 ▼

Vessel A: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Vessel B: Solstraum (SOLSTRAUM) Russia

Minimum Distance: 155 meters
Average Distance: 165 meters
Duration: 3h 14m
Period: 2026-08-24T23:51:29+00:00 to 2026-08-25T03:06:11+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (DMITRIY RULEVSKIY and SOLSTRAUM) maintained close proximity (min 155m, avg 165m) for 195 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/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	20/25	Min distance 155m, avg 165m
Duration	25/25	Duration 195 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±5m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273291710,
        "imo": 9157014,
        "name": "SOLSTRAUM",
        "flag": "Russia"
    },
    "min_distance_m": 155.400000000000005684341886080801486968994140625,
    "avg_distance_m": 164.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 4.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 194.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 11682,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-24T23:51:29+00:00",
        "end": "2026-08-25T03:06:11+00:00"
    },
    "points_count": {
        "vessel_a": 24,
        "vessel_b": 24
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 155m, avg 165m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 195 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (DMITRIY RULEVSKIY and SOLSTRAUM) maintained close proximity (min 155m, avg 165m) for 195 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\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 24, 2026 20:52 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 33m
Data Points: 30 AIS positions
Period: 2026-08-24T20:52:09+00:00 to 2026-08-25T03:25:11+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 393,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-08-24T20:52:09+00:00",
        "lat": 59.8820649999999972123987390659749507904052734375,
        "lon": 30.22491169999999982564986567012965679168701171875
    },
    "last_point": {
        "ts": "2026-08-25T03:25:11+00:00",
        "lat": 59.88204830000000100653778645209968090057373046875,
        "lon": 30.224953299999999245528670144267380237579345703125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Aug 24, 2026 20:52 UTC 75.0% ▼

Duration: 6h 33m
Radius: 12 meters
Data Points: 30 AIS positions
Centroid: 59.8821, 30.2249
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 12.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 393,
    "points": 30,
    "centroid": {
        "lat": 59.8820900500000021793312043882906436920166015625,
        "lon": 30.2249445066666595494098146446049213409423828125
    },
    "bbox": {
        "min_lat": 59.88199329999999775964170112274587154388427734375,
        "min_lon": 30.22486669999999975289028952829539775848388671875,
        "max_lat": 59.8821999999999974306774674914777278900146484375,
        "max_lon": 30.22500169999999997116901795379817485809326171875
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Sts Ust-Luga/St. Petersburg Approach

Aug 24, 2026 19:08 UTC 90/100 ▼

Vessel A: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Vessel B: Solstraum (SOLSTRAUM) Russia

Minimum Distance: 155 meters
Average Distance: 164 meters
Duration: 5h 44m
Period: 2026-08-24T19:45:11+00:00 to 2026-08-25T01:29:10+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (DMITRIY RULEVSKIY and SOLSTRAUM) maintained close proximity (min 155m, avg 164m) for 344 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/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	20/25	Min distance 155m, avg 164m
Duration	25/25	Duration 344 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±5m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273291710,
        "imo": 9157014,
        "name": "SOLSTRAUM",
        "flag": "Russia"
    },
    "min_distance_m": 155.400000000000005684341886080801486968994140625,
    "avg_distance_m": 163.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 4.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 344,
    "overlap_duration_s": 20639,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-24T19:45:11+00:00",
        "end": "2026-08-25T01:29:10+00:00"
    },
    "points_count": {
        "vessel_a": 18,
        "vessel_b": 18
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 155m, avg 164m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 344 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (DMITRIY RULEVSKIY and SOLSTRAUM) maintained close proximity (min 155m, avg 164m) for 344 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\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 24, 2026 19:08 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 36m
Data Points: 23 AIS positions
Period: 2026-08-24T19:51:49+00:00 to 2026-08-25T02:28:30+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 396.69999999999998863131622783839702606201171875,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-08-24T19:51:49+00:00",
        "lat": 59.88210500000000280351741821505129337310791015625,
        "lon": 30.224908299999999172769094002433121204376220703125
    },
    "last_point": {
        "ts": "2026-08-25T02:28:30+00:00",
        "lat": 59.8821133000000003221430233679711818695068359375,
        "lon": 30.224975000000000591171556152403354644775390625
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Aug 24, 2026 19:08 UTC 75.0% ▼

Duration: 6h 36m
Radius: 11 meters
Data Points: 23 AIS positions
Centroid: 59.8821, 30.2249
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 11.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 396.69999999999998863131622783839702606201171875,
    "points": 23,
    "centroid": {
        "lat": 59.88209956086956964327328023500740528106689453125,
        "lon": 30.224944356521735500109571148641407489776611328125
    },
    "bbox": {
        "min_lat": 59.8820300000000003137756721116602420806884765625,
        "min_lon": 30.22486669999999975289028952829539775848388671875,
        "max_lat": 59.8821999999999974306774674914777278900146484375,
        "max_lon": 30.224986699999998762677932973019778728485107421875
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Sts Ust-Luga/St. Petersburg Approach

Aug 24, 2026 18:25 UTC 75/100 ▼

Vessel A: Solstraum (SOLSTRAUM) Russia

Vessel B: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Minimum Distance: 157 meters
Average Distance: 162 meters
Duration: 52 minutes
Period: 2026-08-24T18:25:20+00:00 to 2026-08-24T19:18:12+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SOLSTRAUM and DMITRIY RULEVSKIY) maintained close proximity (min 156m, avg 162m) for 53 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/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	20/25	Min distance 156m, avg 162m
Duration	10/25	Duration 53 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/St. Petersburg Approach

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273291710,
        "imo": 9157014,
        "name": "SOLSTRAUM",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "min_distance_m": 156.5,
    "avg_distance_m": 162.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 2.5,
    "duration_minutes": 52.89999999999999857891452847979962825775146484375,
    "overlap_duration_s": 3172,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-24T18:25:20+00:00",
        "end": "2026-08-24T19:18:12+00:00"
    },
    "points_count": {
        "vessel_a": 14,
        "vessel_b": 14
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 156m, avg 162m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 53 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\/St. Petersburg Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SOLSTRAUM and DMITRIY RULEVSKIY) maintained close proximity (min 156m, avg 162m) for 53 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\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 24, 2026 18:05 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 38m
Data Points: 20 AIS positions
Period: 2026-08-24T18:50:50+00:00 to 2026-08-25T01:29:10+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 398.30000000000001136868377216160297393798828125,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-08-24T18:50:50+00:00",
        "lat": 59.88215000000000287627699435688555240631103515625,
        "lon": 30.224958300000000832596924738027155399322509765625
    },
    "last_point": {
        "ts": "2026-08-25T01:29:10+00:00",
        "lat": 59.882153299999998807834344916045665740966796875,
        "lon": 30.224971700000001106900526792742311954498291015625
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Aug 24, 2026 18:05 UTC 75.0% ▼

Duration: 6h 38m
Radius: 11 meters
Data Points: 20 AIS positions
Centroid: 59.8821, 30.2249
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 11.300000000000000710542735760100185871124267578125,
    "duration_minutes": 398.30000000000001136868377216160297393798828125,
    "points": 20,
    "centroid": {
        "lat": 59.88209991000000087524313130415976047515869140625,
        "lon": 30.2249419299999999566352926194667816162109375
    },
    "bbox": {
        "min_lat": 59.8820300000000003137756721116602420806884765625,
        "min_lon": 30.22486669999999975289028952829539775848388671875,
        "max_lat": 59.8821999999999974306774674914777278900146484375,
        "max_lon": 30.224986699999998762677932973019778728485107421875
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 24, 2026 16:38 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 4h 13m
Data Points: 13 AIS positions
Period: 2026-08-24T16:38:50+00:00 to 2026-08-24T20:52:09+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 253.30000000000001136868377216160297393798828125,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-08-24T16:38:50+00:00",
        "lat": 59.88210500000000280351741821505129337310791015625,
        "lon": 30.2249249999999989313437254168093204498291015625
    },
    "last_point": {
        "ts": "2026-08-24T20:52:09+00:00",
        "lat": 59.8820649999999972123987390659749507904052734375,
        "lon": 30.22491169999999982564986567012965679168701171875
    }
}

Methodology: 2026.01.18

Sts🛰️? Ust-Luga/St. Petersburg Approach

Aug 24, 2026 16:38 UTC 90/100 ▼

Vessel A: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Vessel B: Solstraum (SOLSTRAUM) Russia

Minimum Distance: 159 meters
Average Distance: 164 meters
Duration: 2h 12m
Period: 2026-08-24T16:38:50+00:00 to 2026-08-24T18:50:50+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (DMITRIY RULEVSKIY and SOLSTRAUM) maintained close proximity (min 159m, avg 164m) for 132 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/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	20/25	Min distance 159m, avg 164m
Duration	25/25	Duration 132 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±3m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG • Acquired: 2026-08-24T15:31:22.924579Z • Platform: sentinel-1c

Click image to view full size

Searched: 2026-08-24T19:30:01.896501+00:00

{
    "vessel_a": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273291710,
        "imo": 9157014,
        "name": "SOLSTRAUM",
        "flag": "Russia"
    },
    "min_distance_m": 159.19999999999998863131622783839702606201171875,
    "avg_distance_m": 163.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 2.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 132,
    "overlap_duration_s": 7920,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-24T16:38:50+00:00",
        "end": "2026-08-24T18:50:50+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 159m, avg 164m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 132 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (DMITRIY RULEVSKIY and SOLSTRAUM) maintained close proximity (min 159m, avg 164m) for 132 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\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.88282689999999774954630993306636810302734375,
            "lon": 30.22473790000000093414200819097459316253662109375
        },
        "time_window": {
            "start_ts": "2026-08-24T16:38:50+00:00",
            "end_ts": "2026-08-24T18:50:50+00:00"
        },
        "searched_at": "2026-08-24T19:30:01.896501+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG",
        "scene_datetime": "2026-08-24T15:31:22.924579Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 29.00003099999999989222487783990800380706787109375,
            "min_lat": 59.5085260000000033642209018580615520477294921875,
            "max_lon": 34.328518000000002530214260332286357879638671875,
            "max_lat": 61.43686699999999945021045277826488018035888671875
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1115803_thumbnail_20260824193006.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1115803_thumbnail_20260824193006.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Aug 24, 2026 16:38 UTC 75.0% ▼

Duration: 4h 13m
Radius: 6 meters
Data Points: 13 AIS positions
Centroid: 59.8821, 30.2249
Zone: Ust-Luga/St. Petersburg Approach

{
    "radius_m": 6.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 253.30000000000001136868377216160297393798828125,
    "points": 13,
    "centroid": {
        "lat": 59.88209614615384879243720206432044506072998046875,
        "lon": 30.224933207692306069702681270428001880645751953125
    },
    "bbox": {
        "min_lat": 59.88206000000000273075784207321703433990478515625,
        "min_lon": 30.224901700000000204227035283111035823822021484375,
        "max_lat": 59.88215000000000287627699435688555240631103515625,
        "max_lon": 30.22499669999999838410076336003839969635009765625
    },
    "zone_id": "russia_ust_luga_approach"
}

Aug 24, 2026 12:40 UTC 90/100 ▼

Vessel A: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Vessel B: Solstraum (SOLSTRAUM) Russia

Minimum Distance: 157 meters
Average Distance: 164 meters
Duration: 6h 10m
Period: 2026-08-24T12:40:31+00:00 to 2026-08-24T18:50:50+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (DMITRIY RULEVSKIY and SOLSTRAUM) maintained close proximity (min 157m, avg 164m) for 370 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/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	20/25	Min distance 157m, avg 164m
Duration	25/25	Duration 370 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±4m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG • Acquired: 2026-08-24T15:31:22.924579Z • Platform: sentinel-1c

Click image to view full size

Searched: 2026-08-24T19:00:10.975654+00:00

{
    "vessel_a": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273291710,
        "imo": 9157014,
        "name": "SOLSTRAUM",
        "flag": "Russia"
    },
    "min_distance_m": 157.400000000000005684341886080801486968994140625,
    "avg_distance_m": 163.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 3.5,
    "duration_minutes": 370.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 22219,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-24T12:40:31+00:00",
        "end": "2026-08-24T18:50:50+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 157m, avg 164m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 370 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (DMITRIY RULEVSKIY and SOLSTRAUM) maintained close proximity (min 157m, avg 164m) for 370 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\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.8828242000000017242200556211173534393310546875,
            "lon": 30.2247401999999993904566508717834949493408203125
        },
        "time_window": {
            "start_ts": "2026-08-24T12:40:31+00:00",
            "end_ts": "2026-08-24T18:50:50+00:00"
        },
        "searched_at": "2026-08-24T19:00:10.975654+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260824T153122_20260824T153147_009139_01225D_F0AA_COG",
        "scene_datetime": "2026-08-24T15:31:22.924579Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 29.00003099999999989222487783990800380706787109375,
            "min_lat": 59.5085260000000033642209018580615520477294921875,
            "max_lon": 34.328518000000002530214260332286357879638671875,
            "max_lat": 61.43686699999999945021045277826488018035888671875
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1115737_thumbnail_20260824190014.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1115737_thumbnail_20260824190014.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Aug 24, 2026 12:21 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 28m
Data Points: 10 AIS positions
Period: 2026-08-24T12:40:31+00:00 to 2026-08-24T19:08:31+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 388,
    "points_in_zone": 10,
    "first_point": {
        "ts": "2026-08-24T12:40:31+00:00",
        "lat": 59.8820716999999973495505400933325290679931640625,
        "lon": 30.22495169999999831134118721820414066314697265625
    },
    "last_point": {
        "ts": "2026-08-24T19:08:31+00:00",
        "lat": 59.88206670000000286790964310057461261749267578125,
        "lon": 30.224945000000001726903064991347491741180419921875
    }
}

Aug 24, 2026 12:21 UTC 75.0% ▼

Duration: 6h 28m
Radius: 6 meters
Data Points: 10 AIS positions
Centroid: 59.8821, 30.2249
Zone: Ust-Luga/St. Petersburg Approach

{
    "radius_m": 6.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 388,
    "points": 10,
    "centroid": {
        "lat": 59.88209382999999519370248890481889247894287109375,
        "lon": 30.22494199999999864303390495479106903076171875
    },
    "bbox": {
        "min_lat": 59.88206000000000273075784207321703433990478515625,
        "min_lon": 30.224901700000000204227035283111035823822021484375,
        "max_lat": 59.88215000000000287627699435688555240631103515625,
        "max_lon": 30.22499669999999838410076336003839969635009765625
    },
    "zone_id": "russia_ust_luga_approach"
}

Aug 24, 2026 11:09 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 5h 29m
Data Points: 4 AIS positions
Period: 2026-08-24T11:09:10+00:00 to 2026-08-24T16:38:50+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 329.69999999999998863131622783839702606201171875,
    "points_in_zone": 4,
    "first_point": {
        "ts": "2026-08-24T11:09:10+00:00",
        "lat": 59.88208829999999949222910800017416477203369140625,
        "lon": 30.2249766999999991412551025860011577606201171875
    },
    "last_point": {
        "ts": "2026-08-24T16:38:50+00:00",
        "lat": 59.88210500000000280351741821505129337310791015625,
        "lon": 30.2249249999999989313437254168093204498291015625
    }
}

Aug 24, 2026 05:10 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 5h 59m
Data Points: 5 AIS positions
Period: 2026-08-24T05:10:11+00:00 to 2026-08-24T11:09:10+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 359,
    "points_in_zone": 5,
    "first_point": {
        "ts": "2026-08-24T05:10:11+00:00",
        "lat": 59.8820817000000005236870492808520793914794921875,
        "lon": 30.2249182999999987941919243894517421722412109375
    },
    "last_point": {
        "ts": "2026-08-24T11:09:10+00:00",
        "lat": 59.88208829999999949222910800017416477203369140625,
        "lon": 30.2249766999999991412551025860011577606201171875
    }
}

Aug 24, 2026 05:01 UTC 90/100 ▼

Vessel A: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Vessel B: Solstraum (SOLSTRAUM) Russia

Minimum Distance: 162 meters
Average Distance: 164 meters
Duration: 5h 53m
Period: 2026-08-24T05:15:31+00:00 to 2026-08-24T11:09:10+00:00
Vessel A Avg Speed: 0.1 knots
Vessel B Avg Speed: 0.1 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (DMITRIY RULEVSKIY and SOLSTRAUM) maintained close proximity (min 162m, avg 164m) for 354 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 Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	20/25	Min distance 162m, avg 164m
Duration	25/25	Duration 354 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/St. Petersburg Approach

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273291710,
        "imo": 9157014,
        "name": "SOLSTRAUM",
        "flag": "Russia"
    },
    "min_distance_m": 161.69999999999998863131622783839702606201171875,
    "avg_distance_m": 163.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 1.5,
    "duration_minutes": 353.6000000000000227373675443232059478759765625,
    "overlap_duration_s": 21219,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-08-24T05:15:31+00:00",
        "end": "2026-08-24T11:09:10+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 162m, avg 164m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 354 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\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (DMITRIY RULEVSKIY and SOLSTRAUM) maintained close proximity (min 162m, avg 164m) for 354 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 Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Sts Ust-Luga/St. Petersburg Approach

Aug 24, 2026 04:36 UTC 75/100 ▼

Vessel A: Solstraum (SOLSTRAUM) Russia

Vessel B: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Minimum Distance: 162 meters
Average Distance: 165 meters
Duration: 59 minutes
Period: 2026-08-24T04:46:12+00:00 to 2026-08-24T05:46:03+00:00
Vessel A Avg Speed: 0.1 knots
Vessel B Avg Speed: 0.1 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SOLSTRAUM and DMITRIY RULEVSKIY) maintained close proximity (min 162m, avg 165m) for 60 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 Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	20/25	Min distance 162m, avg 165m
Duration	10/25	Duration 60 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±3m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273291710,
        "imo": 9157014,
        "name": "SOLSTRAUM",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "min_distance_m": 161.69999999999998863131622783839702606201171875,
    "avg_distance_m": 165.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 59.89999999999999857891452847979962825775146484375,
    "overlap_duration_s": 3591,
    "speed_a_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-24T04:46:12+00:00",
        "end": "2026-08-24T05:46:03+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 162m, avg 165m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 60 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SOLSTRAUM and DMITRIY RULEVSKIY) maintained close proximity (min 162m, avg 165m) for 60 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 Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 24, 2026 04:16 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 23m
Data Points: 7 AIS positions
Period: 2026-08-24T04:45:51+00:00 to 2026-08-24T11:09:10+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 383.30000000000001136868377216160297393798828125,
    "points_in_zone": 7,
    "first_point": {
        "ts": "2026-08-24T04:45:51+00:00",
        "lat": 59.88210670000000135360096464864909648895263671875,
        "lon": 30.22499499999999983401721692644059658050537109375
    },
    "last_point": {
        "ts": "2026-08-24T11:09:10+00:00",
        "lat": 59.88208829999999949222910800017416477203369140625,
        "lon": 30.2249766999999991412551025860011577606201171875
    }
}

Methodology: 2026.01.18

Sts Ust-Luga/St. Petersburg Approach

Aug 24, 2026 03:52 UTC 72/100 ▼

Vessel A: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Vessel B: Solstraum (SOLSTRAUM) Russia

Minimum Distance: 157 meters
Average Distance: 199 meters
Duration: 1h 49m
Period: 2026-08-24T03:52:21+00:00 to 2026-08-24T05:42:04+00:00
Vessel A Avg Speed: 0.1 knots
Vessel B Avg Speed: 0.3 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 72/100

Moderate-confidence STS candidate. Two tankers (DMITRIY RULEVSKIY and SOLSTRAUM) maintained close proximity (min 157m, avg 199m) for 110 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). Moderate distance variation observed during the encounter. Event occurred in Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	20/25	Min distance 157m, avg 199m
Duration	20/25	Duration 110 minutes
Speed Stability	14/20	both nearly stationary; somewhat variable speeds
Distance Consistency	8/15	Distance variance ±99m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273291710,
        "imo": 9157014,
        "name": "SOLSTRAUM",
        "flag": "Russia"
    },
    "min_distance_m": 156.900000000000005684341886080801486968994140625,
    "avg_distance_m": 198.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 99.099999999999994315658113919198513031005859375,
    "duration_minutes": 109.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 6583,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.25,
    "speed_b_std": 0.5100000000000000088817841970012523233890533447265625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.25,
            "max_sog": 1.5
        }
    },
    "time_window": {
        "start": "2026-08-24T03:52:21+00:00",
        "end": "2026-08-24T05:42:04+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 72,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 157m, avg 199m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 110 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 8,
                "max": 15,
                "detail": "Distance variance \u00b199m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (DMITRIY RULEVSKIY and SOLSTRAUM) maintained close proximity (min 157m, avg 199m) for 110 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). Moderate distance variation observed during the encounter. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 24, 2026 03:52 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 1h 49m
Data Points: 8 AIS positions
Period: 2026-08-24T03:52:21+00:00 to 2026-08-24T05:42:04+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 109.7000000000000028421709430404007434844970703125,
    "points_in_zone": 8,
    "first_point": {
        "ts": "2026-08-24T03:52:21+00:00",
        "lat": 59.88212829999999797792042954824864864349365234375,
        "lon": 30.22493670000000065556378103792667388916015625
    },
    "last_point": {
        "ts": "2026-08-24T05:42:04+00:00",
        "lat": 59.88215670000000301342879538424313068389892578125,
        "lon": 30.225016700000001179660102934576570987701416015625
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 24, 2026 01:58 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 3h 43m
Data Points: 9 AIS positions
Period: 2026-08-24T01:58:30+00:00 to 2026-08-24T05:42:04+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 223.599999999999994315658113919198513031005859375,
    "points_in_zone": 9,
    "first_point": {
        "ts": "2026-08-24T01:58:30+00:00",
        "lat": 59.8821166999999974223101162351667881011962890625,
        "lon": 30.22491670000000141271812026388943195343017578125
    },
    "last_point": {
        "ts": "2026-08-24T05:42:04+00:00",
        "lat": 59.88215670000000301342879538424313068389892578125,
        "lon": 30.225016700000001179660102934576570987701416015625
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 24, 2026 00:09 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 5h 32m
Data Points: 11 AIS positions
Period: 2026-08-24T00:09:52+00:00 to 2026-08-24T05:42:04+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 332.19999999999998863131622783839702606201171875,
    "points_in_zone": 11,
    "first_point": {
        "ts": "2026-08-24T00:09:52+00:00",
        "lat": 59.88210000000000121644916362129151821136474609375,
        "lon": 30.224863299999999100009517860598862171173095703125
    },
    "last_point": {
        "ts": "2026-08-24T05:42:04+00:00",
        "lat": 59.88215670000000301342879538424313068389892578125,
        "lon": 30.225016700000001179660102934576570987701416015625
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Aug 24, 2026 00:09 UTC 75.0% ▼

Duration: 5h 32m
Radius: 8 meters
Data Points: 11 AIS positions
Centroid: 59.8821, 30.2249
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 7.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 332.19999999999998863131622783839702606201171875,
    "points": 11,
    "centroid": {
        "lat": 59.88209986363636261330611887387931346893310546875,
        "lon": 30.2249365090909094533344614319503307342529296875
    },
    "bbox": {
        "min_lat": 59.88204499999999796955307829193770885467529296875,
        "min_lon": 30.224863299999999100009517860598862171173095703125,
        "max_lat": 59.88215670000000301342879538424313068389892578125,
        "max_lon": 30.225016700000001179660102934576570987701416015625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 23, 2026 23:12 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 29m
Data Points: 13 AIS positions
Period: 2026-08-23T23:12:51+00:00 to 2026-08-24T05:42:04+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 389.19999999999998863131622783839702606201171875,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-08-23T23:12:51+00:00",
        "lat": 59.88205500000000114368958747945725917816162109375,
        "lon": 30.2248799999999988585841492749750614166259765625
    },
    "last_point": {
        "ts": "2026-08-24T05:42:04+00:00",
        "lat": 59.88215670000000301342879538424313068389892578125,
        "lon": 30.225016700000001179660102934576570987701416015625
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Aug 23, 2026 23:12 UTC 75.0% ▼

Duration: 6h 29m
Radius: 9 meters
Data Points: 13 AIS positions
Centroid: 59.8821, 30.2249
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 8.5,
    "duration_minutes": 389.19999999999998863131622783839702606201171875,
    "points": 13,
    "centroid": {
        "lat": 59.88209463076922389745959662832319736480712890625,
        "lon": 30.224929484615383756818118854425847530364990234375
    },
    "bbox": {
        "min_lat": 59.88204499999999796955307829193770885467529296875,
        "min_lon": 30.224863299999999100009517860598862171173095703125,
        "max_lat": 59.88215670000000301342879538424313068389892578125,
        "max_lon": 30.225016700000001179660102934576570987701416015625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 23, 2026 22:02 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 31m
Data Points: 12 AIS positions
Period: 2026-08-23T22:43:52+00:00 to 2026-08-24T05:15:31+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 391.6000000000000227373675443232059478759765625,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-08-23T22:43:52+00:00",
        "lat": 59.88214169999999825222403160296380519866943359375,
        "lon": 30.22494329999999962410583975724875926971435546875
    },
    "last_point": {
        "ts": "2026-08-24T05:15:31+00:00",
        "lat": 59.8820649999999972123987390659749507904052734375,
        "lon": 30.224908299999999172769094002433121204376220703125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Aug 23, 2026 22:02 UTC 75.0% ▼

Duration: 6h 31m
Radius: 6 meters
Data Points: 12 AIS positions
Centroid: 59.8821, 30.2249
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 5.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 391.6000000000000227373675443232059478759765625,
    "points": 12,
    "centroid": {
        "lat": 59.88209418333332223483012057840824127197265625,
        "lon": 30.224923049999997459735823213122785091400146484375
    },
    "bbox": {
        "min_lat": 59.88204499999999796955307829193770885467529296875,
        "min_lon": 30.224863299999999100009517860598862171173095703125,
        "max_lat": 59.88214169999999825222403160296380519866943359375,
        "max_lon": 30.22499499999999983401721692644059658050537109375
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 23, 2026 21:16 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 17m
Data Points: 12 AIS positions
Period: 2026-08-23T21:59:30+00:00 to 2026-08-24T04:16:41+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 377.19999999999998863131622783839702606201171875,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-08-23T21:59:30+00:00",
        "lat": 59.88206670000000286790964310057461261749267578125,
        "lon": 30.22495500000000134832589537836611270904541015625
    },
    "last_point": {
        "ts": "2026-08-24T04:16:41+00:00",
        "lat": 59.88211170000000294066921924240887165069580078125,
        "lon": 30.224921699999999447072696057148277759552001953125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Aug 23, 2026 21:16 UTC 75.0% ▼

Duration: 6h 17m
Radius: 7 meters
Data Points: 12 AIS positions
Centroid: 59.8821, 30.2249
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 6.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 377.19999999999998863131622783839702606201171875,
    "points": 12,
    "centroid": {
        "lat": 59.88209112499998809653334319591522216796875,
        "lon": 30.2249272250000018402715795673429965972900390625
    },
    "bbox": {
        "min_lat": 59.8820400000000034879121812991797924041748046875,
        "min_lon": 30.224863299999999100009517860598862171173095703125,
        "max_lat": 59.88214169999999825222403160296380519866943359375,
        "max_lon": 30.22499669999999838410076336003839969635009765625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 23, 2026 15:10 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 19m
Data Points: 5 AIS positions
Period: 2026-08-23T15:43:31+00:00 to 2026-08-23T22:02:31+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 379,
    "points_in_zone": 5,
    "first_point": {
        "ts": "2026-08-23T15:43:31+00:00",
        "lat": 59.8820683000000002493834472261369228363037109375,
        "lon": 30.224941699999998689918356831185519695281982421875
    },
    "last_point": {
        "ts": "2026-08-23T22:02:31+00:00",
        "lat": 59.8820400000000034879121812991797924041748046875,
        "lon": 30.22499330000000128393367049284279346466064453125
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 23, 2026 14:14 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 32m
Data Points: 5 AIS positions
Period: 2026-08-23T14:44:11+00:00 to 2026-08-23T21:16:57+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 392.80000000000001136868377216160297393798828125,
    "points_in_zone": 5,
    "first_point": {
        "ts": "2026-08-23T14:44:11+00:00",
        "lat": 59.88208829999999949222910800017416477203369140625,
        "lon": 30.224908299999999172769094002433121204376220703125
    },
    "last_point": {
        "ts": "2026-08-23T21:16:57+00:00",
        "lat": 59.8821200000000004592948243953287601470947265625,
        "lon": 30.2249182999999987941919243894517421722412109375
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 23, 2026 13:48 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 1h 54m
Data Points: 6 AIS positions
Period: 2026-08-23T13:48:52+00:00 to 2026-08-23T15:43:31+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 114.7000000000000028421709430404007434844970703125,
    "points_in_zone": 6,
    "first_point": {
        "ts": "2026-08-23T13:48:52+00:00",
        "lat": 59.88206170000000128084138850681483745574951171875,
        "lon": 30.224933300000000002683009370230138301849365234375
    },
    "last_point": {
        "ts": "2026-08-23T15:43:31+00:00",
        "lat": 59.8820683000000002493834472261369228363037109375,
        "lon": 30.224941699999998689918356831185519695281982421875
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 23, 2026 11:06 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 4h 37m
Data Points: 8 AIS positions
Period: 2026-08-23T11:06:10+00:00 to 2026-08-23T15:43:31+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 277.3999999999999772626324556767940521240234375,
    "points_in_zone": 8,
    "first_point": {
        "ts": "2026-08-23T11:06:10+00:00",
        "lat": 59.88205669999999969377313391305506229400634765625,
        "lon": 30.224965000000000969748725765384733676910400390625
    },
    "last_point": {
        "ts": "2026-08-23T15:43:31+00:00",
        "lat": 59.8820683000000002493834472261369228363037109375,
        "lon": 30.224941699999998689918356831185519695281982421875
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 23, 2026 10:33 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 5h 10m
Data Points: 9 AIS positions
Period: 2026-08-23T10:33:11+00:00 to 2026-08-23T15:43:31+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 310.30000000000001136868377216160297393798828125,
    "points_in_zone": 9,
    "first_point": {
        "ts": "2026-08-23T10:33:11+00:00",
        "lat": 59.8819950000000034151526051573455333709716796875,
        "lon": 30.224940000000000139834810397587716579437255859375
    },
    "last_point": {
        "ts": "2026-08-23T15:43:31+00:00",
        "lat": 59.8820683000000002493834472261369228363037109375,
        "lon": 30.224941699999998689918356831185519695281982421875
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 23, 2026 09:14 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 28m
Data Points: 13 AIS positions
Period: 2026-08-23T09:14:52+00:00 to 2026-08-23T15:43:31+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 388.6000000000000227373675443232059478759765625,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-08-23T09:14:52+00:00",
        "lat": 59.88210670000000135360096464864909648895263671875,
        "lon": 30.224928299999998415614754776470363140106201171875
    },
    "last_point": {
        "ts": "2026-08-23T15:43:31+00:00",
        "lat": 59.8820683000000002493834472261369228363037109375,
        "lon": 30.224941699999998689918356831185519695281982421875
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Aug 23, 2026 09:14 UTC 75.0% ▼

Duration: 6h 28m
Radius: 8 meters
Data Points: 13 AIS positions
Centroid: 59.8821, 30.2249
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 7.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 388.6000000000000227373675443232059478759765625,
    "points": 13,
    "centroid": {
        "lat": 59.88206538461538031015152228064835071563720703125,
        "lon": 30.22492255384614878721549757756292819976806640625
    },
    "bbox": {
        "min_lat": 59.8819950000000034151526051573455333709716796875,
        "min_lon": 30.224823300000000614318196312524378299713134765625,
        "max_lat": 59.882121699999999009378370828926563262939453125,
        "max_lon": 30.224965000000000969748725765384733676910400390625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Sts🛰️? Ust-Luga/St. Petersburg Approach

Aug 23, 2026 08:46 UTC 80/100 ▼

Vessel A: IMO 8411463 (ABIGAIL) RUSSIA

Vessel B: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Minimum Distance: 29 meters
Average Distance: 34 meters
Duration: 51 minutes
Period: 2026-08-23T08:46:14+00:00 to 2026-08-23T09:37:35+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ABIGAIL and DMITRIY RULEVSKIY) maintained close proximity (min 29m, avg 34m) 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/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	25/25	Min distance 29m, avg 34m
Duration	10/25	Duration 51 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±3m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1D_IW_GRDH_1SDV_20260823T042457_20260823T042522_004248_007CEB_35C1_COG • Acquired: 2026-08-23T04:24:57.903420Z • Platform: sentinel-1d

Click image to view full size

Searched: 2026-08-23T10:00:09.215461+00:00

{
    "vessel_a": {
        "mmsi": 273318420,
        "imo": 8411463,
        "name": "ABIGAIL",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "min_distance_m": 28.60000000000000142108547152020037174224853515625,
    "avg_distance_m": 34.10000000000000142108547152020037174224853515625,
    "distance_consistency_m": 3.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 51.39999999999999857891452847979962825775146484375,
    "overlap_duration_s": 3081,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-23T08:46:14+00:00",
        "end": "2026-08-23T09:37:35+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 29m, avg 34m"
            },
            "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 \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ABIGAIL and DMITRIY RULEVSKIY) maintained close proximity (min 29m, avg 34m) 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\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.88196450000000226054908125661313533782958984375,
            "lon": 30.224750499999998964995029382407665252685546875
        },
        "time_window": {
            "start_ts": "2026-08-23T08:46:14+00:00",
            "end_ts": "2026-08-23T09:37:35+00:00"
        },
        "searched_at": "2026-08-23T10:00:09.215461+00:00",
        "scene_id": "S1D_IW_GRDH_1SDV_20260823T042457_20260823T042522_004248_007CEB_35C1_COG",
        "scene_datetime": "2026-08-23T04:24:57.903420Z",
        "platform": "sentinel-1d",
        "bbox": {
            "min_lon": 26.61877799999999893998392508365213871002197265625,
            "min_lat": 59.33255799999999879901224630884826183319091796875,
            "max_lon": 31.9297100000000000363797880709171295166015625,
            "max_lat": 61.26119200000000120098775369115173816680908203125
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1101549_thumbnail_20260823100013.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1101549_thumbnail_20260823100013.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Aug 23, 2026 08:45 UTC 72/100 ▼

Vessel A: IMO 8711760 (KAPITAN DZHUMANOV) Russia

Vessel B: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Minimum Distance: 72 meters
Average Distance: 86 meters
Duration: 40 minutes
Period: 2026-08-23T08:45:28+00:00 to 2026-08-23T09:25:50+00:00
Vessel A Avg Speed: 0.3 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 72/100

Moderate-confidence STS candidate. Two tankers (KAPITAN DZHUMANOV and DMITRIY RULEVSKIY) maintained close proximity (min 72m, avg 86m) for 40 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	25/25	Min distance 72m, avg 86m
Duration	5/25	Duration 40 minutes
Speed Stability	17/20	both nearly stationary; stable speeds
Distance Consistency	15/15	Distance variance ±21m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1D_IW_GRDH_1SDV_20260823T042457_20260823T042522_004248_007CEB_35C1_COG • Acquired: 2026-08-23T04:24:57.903420Z • Platform: sentinel-1d

Click image to view full size

Searched: 2026-08-23T09:45:13.056291+00:00

{
    "vessel_a": {
        "mmsi": 273294560,
        "imo": 8711760,
        "name": "KAPITAN DZHUMANOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273424720,
        "imo": 8724767,
        "name": "DMITRIY RULEVSKIY",
        "flag": "RUSSIA"
    },
    "min_distance_m": 72.099999999999994315658113919198513031005859375,
    "avg_distance_m": 86.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 21.199999999999999289457264239899814128875732421875,
    "duration_minutes": 40.39999999999999857891452847979962825775146484375,
    "overlap_duration_s": 2422,
    "speed_a_avg": 0.299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.450000000000000011102230246251565404236316680908203125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.299999999999999988897769753748434595763683319091796875,
            "max_sog": 1
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-23T08:45:28+00:00",
        "end": "2026-08-23T09:25:50+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 72,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 72m, avg 86m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 40 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b121m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (KAPITAN DZHUMANOV and DMITRIY RULEVSKIY) maintained close proximity (min 72m, avg 86m) for 40 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.8818258000000014362740330398082733154296875,
            "lon": 30.225200199999999739475242677144706249237060546875
        },
        "time_window": {
            "start_ts": "2026-08-23T08:45:28+00:00",
            "end_ts": "2026-08-23T09:25:50+00:00"
        },
        "searched_at": "2026-08-23T09:45:13.056291+00:00",
        "scene_id": "S1D_IW_GRDH_1SDV_20260823T042457_20260823T042522_004248_007CEB_35C1_COG",
        "scene_datetime": "2026-08-23T04:24:57.903420Z",
        "platform": "sentinel-1d",
        "bbox": {
            "min_lon": 26.61877799999999893998392508365213871002197265625,
            "min_lat": 59.33255799999999879901224630884826183319091796875,
            "max_lon": 31.9297100000000000363797880709171295166015625,
            "max_lat": 61.26119200000000120098775369115173816680908203125
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1101271_thumbnail_20260823094517.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1101271_thumbnail_20260823094517.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Aug 23, 2026 08:27 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 22m
Data Points: 13 AIS positions
Period: 2026-08-23T08:54:50+00:00 to 2026-08-23T15:16:50+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 382,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-08-23T08:54:50+00:00",
        "lat": 59.882125000000002046363078989088535308837890625,
        "lon": 30.224849999999999994315658113919198513031005859375
    },
    "last_point": {
        "ts": "2026-08-23T15:16:50+00:00",
        "lat": 59.88204329999999941946953185833990573883056640625,
        "lon": 30.224923300000000381260178983211517333984375
    }
}

Aug 23, 2026 08:27 UTC 75.0% ▼

Duration: 6h 22m
Radius: 8 meters
Data Points: 13 AIS positions
Centroid: 59.8821, 30.2249
Zone: Ust-Luga/St. Petersburg Approach

{
    "radius_m": 8.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 382,
    "points": 13,
    "centroid": {
        "lat": 59.8820697461538458128416095860302448272705078125,
        "lon": 30.2249154999999944948285701684653759002685546875
    },
    "bbox": {
        "min_lat": 59.8819950000000034151526051573455333709716796875,
        "min_lon": 30.224823300000000614318196312524378299713134765625,
        "max_lat": 59.882125000000002046363078989088535308837890625,
        "max_lon": 30.224965000000000969748725765384733676910400390625
    },
    "zone_id": "russia_ust_luga_approach"
}

Aug 23, 2026 07:41 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 33m
Data Points: 12 AIS positions
Period: 2026-08-23T07:41:42+00:00 to 2026-08-23T14:14:50+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 393.1000000000000227373675443232059478759765625,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-08-23T07:41:42+00:00",
        "lat": 59.88204499999999796955307829193770885467529296875,
        "lon": 30.224985000000000212594386539421975612640380859375
    },
    "last_point": {
        "ts": "2026-08-23T14:14:50+00:00",
        "lat": 59.8820683000000002493834472261369228363037109375,
        "lon": 30.2249249999999989313437254168093204498291015625
    }
}