KAPITAN DZHUMANOV

{
    "vessel_a": {
        "mmsi": 273294560,
        "imo": 8711760,
        "name": "KAPITAN DZHUMANOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273357610,
        "imo": 8915548,
        "name": "RYAZAN",
        "flag": "RUSSIA"
    },
    "min_distance_m": 281.3999999999999772626324556767940521240234375,
    "avg_distance_m": 285.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 180.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 10849,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-09T11:25:23+00:00",
        "end": "2026-10-09T14:26:12+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": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 281m, avg 285m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 181 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 (KAPITAN DZHUMANOV and RYAZAN) maintained close proximity (min 281m, avg 285m) for 181 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": 59.8840414000000009764335118234157562255859375,
            "lon": 30.22766250000000098907548817805945873260498046875
        },
        "time_window": {
            "start_ts": "2026-10-09T11:25:23+00:00",
            "end_ts": "2026-10-09T14:26:12+00:00"
        },
        "searched_at": "2026-10-09T18:00:03.874881+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20261009T154740_20261009T154805_009810_0138A8_F365_COG",
        "scene_datetime": "2026-10-09T15:47:40.510934Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 25.17031899999999922101778793148696422576904296875,
            "min_lat": 58.86817599999999828241925570182502269744873046875,
            "max_lon": 30.414179000000000741010808269493281841278076171875,
            "max_lat": 60.7958110000000004902176442556083202362060546875
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/10\/event_1484197_thumbnail_20261009180008.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/10\/event_1484197_thumbnail_20261009180008.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Oct 9, 2026 11:04 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 4h 20m
Data Points: 6 AIS positions
Period: 2026-10-09T11:04:23+00:00 to 2026-10-09T15:25:20+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 260.8999999999999772626324556767940521240234375,
    "points_in_zone": 6,
    "first_point": {
        "ts": "2026-10-09T11:04:23+00:00",
        "lat": 59.8841867000000007692506187595427036285400390625,
        "lon": 30.230199999999999960209606797434389591217041015625
    },
    "last_point": {
        "ts": "2026-10-09T15:25:20+00:00",
        "lat": 59.8907999999999987039700499735772609710693359375,
        "lon": 30.220601699999999567580744042061269283294677734375
    }
}

Oct 9, 2026 10:58 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 4h 27m
Data Points: 7 AIS positions
Period: 2026-10-09T10:58:04+00:00 to 2026-10-09T15:25:20+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 267.30000000000001136868377216160297393798828125,
    "points_in_zone": 7,
    "first_point": {
        "ts": "2026-10-09T10:58:04+00:00",
        "lat": 59.8841867000000007692506187595427036285400390625,
        "lon": 30.230216699999999718784238211810588836669921875
    },
    "last_point": {
        "ts": "2026-10-09T15:25:20+00:00",
        "lat": 59.8907999999999987039700499735772609710693359375,
        "lon": 30.220601699999999567580744042061269283294677734375
    }
}

Sts Ust-Luga/St. Petersburg Approach

Oct 9, 2026 10:52 UTC 70/100 ▼

Vessel A: Ryazan (RYAZAN) RUSSIA

Vessel B: IMO 8711760 (KAPITAN DZHUMANOV) Russia

Minimum Distance: 285 meters
Average Distance: 287 meters
Duration: 54 minutes
Period: 2026-10-09T10:59:06+00:00 to 2026-10-09T11:53:58+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: 70/100

Moderate-confidence STS candidate. Two tankers (RYAZAN and KAPITAN DZHUMANOV) maintained close proximity (min 285m, avg 287m) for 55 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	15/25	Min distance 285m, avg 287m
Duration	10/25	Duration 55 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±1m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273357610,
        "imo": 8915548,
        "name": "RYAZAN",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273294560,
        "imo": 8711760,
        "name": "KAPITAN DZHUMANOV",
        "flag": "Russia"
    },
    "min_distance_m": 285,
    "avg_distance_m": 286.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 1.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 54.89999999999999857891452847979962825775146484375,
    "overlap_duration_s": 3292,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-09T10:59:06+00:00",
        "end": "2026-10-09T11:53:58+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": 70,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 285m, avg 287m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 55 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "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 (RYAZAN and KAPITAN DZHUMANOV) maintained close proximity (min 285m, avg 287m) for 55 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

Oct 9, 2026 07:16 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 4h 29m
Data Points: 6 AIS positions
Period: 2026-10-09T07:16:03+00:00 to 2026-10-09T11:45:04+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 269,
    "points_in_zone": 6,
    "first_point": {
        "ts": "2026-10-09T07:16:03+00:00",
        "lat": 59.884174999999999045030563138425350189208984375,
        "lon": 30.230251700000000170120983966626226902008056640625
    },
    "last_point": {
        "ts": "2026-10-09T11:45:04+00:00",
        "lat": 59.8842149999999975307218846864998340606689453125,
        "lon": 30.230180000000000717363946023397147655487060546875
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 19:03 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 1h 6m
Data Points: 4 AIS positions
Period: 2026-10-08T19:03:53+00:00 to 2026-10-08T20:10:12+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 66.2999999999999971578290569595992565155029296875,
    "points_in_zone": 4,
    "first_point": {
        "ts": "2026-10-08T19:03:53+00:00",
        "lat": 59.88415830000000283916961052455008029937744140625,
        "lon": 30.230276700000001000034899334423243999481201171875
    },
    "last_point": {
        "ts": "2026-10-08T20:10:12+00:00",
        "lat": 59.8841867000000007692506187595427036285400390625,
        "lon": 30.230243300000001482885636505670845508575439453125
    }
}

Methodology: 2026.01.18

Sts🛰️✗ Ust-Luga/St. Petersburg Approach

Oct 8, 2026 18:16 UTC 70/100 ▼

Vessel A: IMO 8711760 (KAPITAN DZHUMANOV) Russia

Vessel B: Ryazan (RYAZAN) RUSSIA

Minimum Distance: 277 meters
Average Distance: 283 meters
Duration: 57 minutes
Period: 2026-10-08T18:16:12+00:00 to 2026-10-08T19:13:54+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: 70/100

Moderate-confidence STS candidate. Two tankers (KAPITAN DZHUMANOV and RYAZAN) maintained close proximity (min 276m, avg 283m) for 58 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	15/25	Min distance 276m, avg 283m
Duration	10/25	Duration 58 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 Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-09T00:45:01.245945+00:00

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273294560,
        "imo": 8711760,
        "name": "KAPITAN DZHUMANOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273357610,
        "imo": 8915548,
        "name": "RYAZAN",
        "flag": "RUSSIA"
    },
    "min_distance_m": 276.5,
    "avg_distance_m": 282.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 4.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 57.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 3462,
    "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": "2026-10-08T18:16:12+00:00",
        "end": "2026-10-08T19:13:54+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": 70,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 276m, avg 283m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 58 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": "Moderate-confidence STS candidate. Two tankers (KAPITAN DZHUMANOV and RYAZAN) maintained close proximity (min 276m, avg 283m) for 58 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": "not_found",
        "centroid": {
            "lat": 59.88400219999999762876541353762149810791015625,
            "lon": 30.2277073999999998932253220118582248687744140625
        },
        "time_window": {
            "start_ts": "2026-10-08T18:16:12+00:00",
            "end_ts": "2026-10-08T19:13:54+00:00"
        },
        "searched_at": "2026-10-09T00:45:01.245945+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 18:16 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 1h 54m
Data Points: 8 AIS positions
Period: 2026-10-08T18:16:12+00:00 to 2026-10-08T20:10:12+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 114,
    "points_in_zone": 8,
    "first_point": {
        "ts": "2026-10-08T18:16:12+00:00",
        "lat": 59.8841400000000021464074961841106414794921875,
        "lon": 30.23017829999999861456672078929841518402099609375
    },
    "last_point": {
        "ts": "2026-10-08T20:10:12+00:00",
        "lat": 59.8841867000000007692506187595427036285400390625,
        "lon": 30.230243300000001482885636505670845508575439453125
    }
}

Methodology: 2026.01.18

Sts Ust-Luga/St. Petersburg Approach

Oct 8, 2026 17:51 UTC 75/100 ▼

Vessel A: IMO 8711760 (KAPITAN DZHUMANOV) Russia

Vessel B: Ryazan (RYAZAN) RUSSIA

Minimum Distance: 277 meters
Average Distance: 283 meters
Duration: 1h 22m
Period: 2026-10-08T17:51:33+00:00 to 2026-10-08T19:13:54+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 (KAPITAN DZHUMANOV and RYAZAN) maintained close proximity (min 276m, avg 282m) for 82 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	15/25	Min distance 276m, avg 282m
Duration	15/25	Duration 82 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": 273294560,
        "imo": 8711760,
        "name": "KAPITAN DZHUMANOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273357610,
        "imo": 8915548,
        "name": "RYAZAN",
        "flag": "RUSSIA"
    },
    "min_distance_m": 276.5,
    "avg_distance_m": 282.5,
    "distance_consistency_m": 4,
    "duration_minutes": 82.2999999999999971578290569595992565155029296875,
    "overlap_duration_s": 4941,
    "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": "2026-10-08T17:51:33+00:00",
        "end": "2026-10-08T19:13:54+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": 75,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 276m, avg 282m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 82 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": "Moderate-confidence STS candidate. Two tankers (KAPITAN DZHUMANOV and RYAZAN) maintained close proximity (min 276m, avg 282m) for 82 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

Oct 8, 2026 17:00 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 3h 9m
Data Points: 13 AIS positions
Period: 2026-10-08T17:00:54+00:00 to 2026-10-08T20:10:12+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 189.30000000000001136868377216160297393798828125,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-10-08T17:00:54+00:00",
        "lat": 59.88414499999999662804839317686855792999267578125,
        "lon": 30.230263300000000725731297279708087444305419921875
    },
    "last_point": {
        "ts": "2026-10-08T20:10:12+00:00",
        "lat": 59.8841867000000007692506187595427036285400390625,
        "lon": 30.230243300000001482885636505670845508575439453125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 17:00 UTC 75.0% ▼

Duration: 3h 9m
Radius: 4 meters
Data Points: 13 AIS positions
Centroid: 59.8842, 30.2302
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 4.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 189.30000000000001136868377216160297393798828125,
    "points": 13,
    "centroid": {
        "lat": 59.88416166923077099681904655881226062774658203125,
        "lon": 30.230226392307688598748427466489374637603759765625
    },
    "bbox": {
        "min_lat": 59.884129999999998972270986996591091156005859375,
        "min_lon": 30.230168299999998993143890402279794216156005859375,
        "max_lat": 59.88419329999999973779267747886478900909423828125,
        "max_lon": 30.230276700000001000034899334423243999481201171875
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 16:08 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 4h 1m
Data Points: 16 AIS positions
Period: 2026-10-08T16:08:33+00:00 to 2026-10-08T20:10:12+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 241.69999999999998863131622783839702606201171875,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-10-08T16:08:33+00:00",
        "lat": 59.88416670000000152640495798550546169281005859375,
        "lon": 30.230193299999999823057805770076811313629150390625
    },
    "last_point": {
        "ts": "2026-10-08T20:10:12+00:00",
        "lat": 59.8841867000000007692506187595427036285400390625,
        "lon": 30.230243300000001482885636505670845508575439453125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 16:08 UTC 75.0% ▼

Duration: 4h 1m
Radius: 4 meters
Data Points: 16 AIS positions
Centroid: 59.8842, 30.2302
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 4.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 241.69999999999998863131622783839702606201171875,
    "points": 16,
    "centroid": {
        "lat": 59.884163443749997668419382534921169281005859375,
        "lon": 30.230225918749994207246345467865467071533203125
    },
    "bbox": {
        "min_lat": 59.884129999999998972270986996591091156005859375,
        "min_lon": 30.230168299999998993143890402279794216156005859375,
        "max_lat": 59.88419329999999973779267747886478900909423828125,
        "max_lon": 30.230276700000001000034899334423243999481201171875
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 15:12 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 4h 58m
Data Points: 20 AIS positions
Period: 2026-10-08T15:12:14+00:00 to 2026-10-08T20:10:12+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 298,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-10-08T15:12:14+00:00",
        "lat": 59.8841699999999974579623085446655750274658203125,
        "lon": 30.23011999999999943611328490078449249267578125
    },
    "last_point": {
        "ts": "2026-10-08T20:10:12+00:00",
        "lat": 59.8841867000000007692506187595427036285400390625,
        "lon": 30.230243300000001482885636505670845508575439453125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 15:12 UTC 75.0% ▼

Duration: 4h 58m
Radius: 6 meters
Data Points: 20 AIS positions
Centroid: 59.8842, 30.2302
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 6,
    "duration_minutes": 298,
    "points": 20,
    "centroid": {
        "lat": 59.8841587550000014061879483051598072052001953125,
        "lon": 30.230211729999997061213434790261089801788330078125
    },
    "bbox": {
        "min_lat": 59.88410499999999814235707162879407405853271484375,
        "min_lon": 30.23011999999999943611328490078449249267578125,
        "max_lat": 59.88419329999999973779267747886478900909423828125,
        "max_lon": 30.230276700000001000034899334423243999481201171875
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 14:36 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 5h 33m
Data Points: 25 AIS positions
Period: 2026-10-08T14:36:32+00:00 to 2026-10-08T20:10:12+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 333.69999999999998863131622783839702606201171875,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-10-08T14:36:32+00:00",
        "lat": 59.8841733000000004949470167048275470733642578125,
        "lon": 30.23013830000000012887539924122393131256103515625
    },
    "last_point": {
        "ts": "2026-10-08T20:10:12+00:00",
        "lat": 59.8841867000000007692506187595427036285400390625,
        "lon": 30.230243300000001482885636505670845508575439453125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 14:36 UTC 75.0% ▼

Duration: 5h 33m
Radius: 7 meters
Data Points: 25 AIS positions
Centroid: 59.8842, 30.2302
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 6.5,
    "duration_minutes": 333.69999999999998863131622783839702606201171875,
    "points": 25,
    "centroid": {
        "lat": 59.8841628680000184203890967182815074920654296875,
        "lon": 30.2301964480000009416471584700047969818115234375
    },
    "bbox": {
        "min_lat": 59.88410499999999814235707162879407405853271484375,
        "min_lon": 30.230115000000001401758709107525646686553955078125,
        "max_lat": 59.88419329999999973779267747886478900909423828125,
        "max_lon": 30.230276700000001000034899334423243999481201171875
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Sts🛰️✗ Ust-Luga/St. Petersburg Approach

Oct 8, 2026 13:32 UTC 85/100 ▼

Vessel A: Ryazan (RYAZAN) RUSSIA

Vessel B: IMO 8711760 (KAPITAN DZHUMANOV) Russia

Minimum Distance: 278 meters
Average Distance: 288 meters
Duration: 5h 35m
Period: 2026-10-08T13:32:03+00:00 to 2026-10-08T19:07:25+00:00
Vessel A Avg Speed: 0.1 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 (RYAZAN and KAPITAN DZHUMANOV) maintained close proximity (min 278m, avg 288m) for 335 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	15/25	Min distance 278m, avg 288m
Duration	25/25	Duration 335 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±14m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-08T20:00:11.508361+00:00

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273357610,
        "imo": 8915548,
        "name": "RYAZAN",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273294560,
        "imo": 8711760,
        "name": "KAPITAN DZHUMANOV",
        "flag": "Russia"
    },
    "min_distance_m": 278.3999999999999772626324556767940521240234375,
    "avg_distance_m": 288.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 14.5,
    "duration_minutes": 335.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 20122,
    "speed_a_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_a_std": 0.190000000000000002220446049250313080847263336181640625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.8000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-08T13:32:03+00:00",
        "end": "2026-10-08T19:07:25+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 278m, avg 288m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 335 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b114m"
            },
            "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 (RYAZAN and KAPITAN DZHUMANOV) maintained close proximity (min 278m, avg 288m) for 335 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 59.88395580000000251175151788629591464996337890625,
            "lon": 30.227740499999999457259036717005074024200439453125
        },
        "time_window": {
            "start_ts": "2026-10-08T13:32:03+00:00",
            "end_ts": "2026-10-08T19:07:25+00:00"
        },
        "searched_at": "2026-10-08T20:00:11.508361+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 13:18 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 28m
Data Points: 28 AIS positions
Period: 2026-10-08T13:41:33+00:00 to 2026-10-08T20:10:12+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": 28,
    "first_point": {
        "ts": "2026-10-08T13:41:33+00:00",
        "lat": 59.88421670000000318623278872109949588775634765625,
        "lon": 30.23020999999999958163243718445301055908203125
    },
    "last_point": {
        "ts": "2026-10-08T20:10:12+00:00",
        "lat": 59.8841867000000007692506187595427036285400390625,
        "lon": 30.230243300000001482885636505670845508575439453125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 13:18 UTC 75.0% ▼

Duration: 6h 28m
Radius: 7 meters
Data Points: 28 AIS positions
Centroid: 59.8842, 30.2302
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 7.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 388.6000000000000227373675443232059478759765625,
    "points": 28,
    "centroid": {
        "lat": 59.88416899285716255008082953281700611114501953125,
        "lon": 30.230194271428576513471853104420006275177001953125
    },
    "bbox": {
        "min_lat": 59.88410499999999814235707162879407405853271484375,
        "min_lon": 30.230115000000001401758709107525646686553955078125,
        "max_lat": 59.8842317000000008420101949013769626617431640625,
        "max_lon": 30.230276700000001000034899334423243999481201171875
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Sts🛰️✗ Ust-Luga/St. Petersburg Approach

Oct 8, 2026 12:05 UTC 85/100 ▼

Vessel A: Ryazan (RYAZAN) RUSSIA

Vessel B: IMO 8711760 (KAPITAN DZHUMANOV) Russia

Minimum Distance: 278 meters
Average Distance: 298 meters
Duration: 6h 18m
Period: 2026-10-08T12:05:46+00:00 to 2026-10-08T18:23:46+00:00
Vessel A Avg Speed: 0.1 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 (RYAZAN and KAPITAN DZHUMANOV) maintained close proximity (min 278m, avg 298m) for 378 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	15/25	Min distance 278m, avg 298m
Duration	25/25	Duration 378 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±19m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-08T18:45:14.057894+00:00

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273357610,
        "imo": 8915548,
        "name": "RYAZAN",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273294560,
        "imo": 8711760,
        "name": "KAPITAN DZHUMANOV",
        "flag": "Russia"
    },
    "min_distance_m": 278.3999999999999772626324556767940521240234375,
    "avg_distance_m": 297.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 19.10000000000000142108547152020037174224853515625,
    "duration_minutes": 378,
    "overlap_duration_s": 22680,
    "speed_a_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_a_std": 0.2399999999999999911182158029987476766109466552734375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 0.8000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-08T12:05:46+00:00",
        "end": "2026-10-08T18:23:46+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": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 278m, avg 298m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 378 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b119m"
            },
            "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 (RYAZAN and KAPITAN DZHUMANOV) maintained close proximity (min 278m, avg 298m) for 378 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 59.88366839999999768906491226516664028167724609375,
            "lon": 30.227996600000000881891537574119865894317626953125
        },
        "time_window": {
            "start_ts": "2026-10-08T12:05:46+00:00",
            "end_ts": "2026-10-08T18:23:46+00:00"
        },
        "searched_at": "2026-10-08T18:45:14.057894+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 12:01 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 29m
Data Points: 31 AIS positions
Period: 2026-10-08T12:51:34+00:00 to 2026-10-08T19:21:13+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 389.6000000000000227373675443232059478759765625,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-10-08T12:51:34+00:00",
        "lat": 59.88424330000000139762050821445882320404052734375,
        "lon": 30.23023500000000041154635255225002765655517578125
    },
    "last_point": {
        "ts": "2026-10-08T19:21:13+00:00",
        "lat": 59.8841850000000022191670723259449005126953125,
        "lon": 30.230264999999999275814843713305890560150146484375
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 12:01 UTC 75.0% ▼

Duration: 6h 29m
Radius: 11 meters
Data Points: 31 AIS positions
Centroid: 59.8842, 30.2302
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 10.699999999999999289457264239899814128875732421875,
    "duration_minutes": 389.6000000000000227373675443232059478759765625,
    "points": 31,
    "centroid": {
        "lat": 59.88417935483871445967452018521726131439208984375,
        "lon": 30.230188912903233955375981167890131473541259765625
    },
    "bbox": {
        "min_lat": 59.88410499999999814235707162879407405853271484375,
        "min_lon": 30.230084999999998984776539145968854427337646484375,
        "max_lat": 59.8842599999999976034814608283340930938720703125,
        "max_lon": 30.230276700000001000034899334423243999481201171875
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Sts Ust-Luga/St. Petersburg Approach

Oct 8, 2026 11:10 UTC 85/100 ▼

Vessel A: Ryazan (RYAZAN) RUSSIA

Vessel B: IMO 8711760 (KAPITAN DZHUMANOV) Russia

Minimum Distance: 280 meters
Average Distance: 309 meters
Duration: 5h 56m
Period: 2026-10-08T11:51:42+00:00 to 2026-10-08T17:48:26+00:00
Vessel A Avg Speed: 0.1 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 (RYAZAN and KAPITAN DZHUMANOV) maintained close proximity (min 280m, avg 309m) for 357 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown

Factor	Score	Detail
Distance Tightness	15/25	Min distance 280m, avg 309m
Duration	25/25	Duration 357 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±17m
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": 273357610,
        "imo": 8915548,
        "name": "RYAZAN",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273294560,
        "imo": 8711760,
        "name": "KAPITAN DZHUMANOV",
        "flag": "Russia"
    },
    "min_distance_m": 280.3999999999999772626324556767940521240234375,
    "avg_distance_m": 308.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 17.199999999999999289457264239899814128875732421875,
    "duration_minutes": 356.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 21404,
    "speed_a_avg": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.299999999999999988897769753748434595763683319091796875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.8000000000000000444089209850062616169452667236328125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-08T11:51:42+00:00",
        "end": "2026-10-08T17:48:26+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": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 280m, avg 309m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 357 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b117m"
            },
            "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 (RYAZAN and KAPITAN DZHUMANOV) maintained close proximity (min 280m, avg 309m) for 357 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 11:06 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 31m
Data Points: 34 AIS positions
Period: 2026-10-08T11:44:43+00:00 to 2026-10-08T18:16:12+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 391.5,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-10-08T11:44:43+00:00",
        "lat": 59.88416000000000138925315695814788341522216796875,
        "lon": 30.230258299999999138663042685948312282562255859375
    },
    "last_point": {
        "ts": "2026-10-08T18:16:12+00:00",
        "lat": 59.8841400000000021464074961841106414794921875,
        "lon": 30.23017829999999861456672078929841518402099609375
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 11:06 UTC 75.0% ▼

Duration: 6h 31m
Radius: 11 meters
Data Points: 34 AIS positions
Centroid: 59.8842, 30.2302
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 10.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 391.5,
    "points": 34,
    "centroid": {
        "lat": 59.88418475294117371277025085873901844024658203125,
        "lon": 30.230200185294119563650383497588336467742919921875
    },
    "bbox": {
        "min_lat": 59.88410499999999814235707162879407405853271484375,
        "min_lon": 30.230084999999998984776539145968854427337646484375,
        "max_lat": 59.8842599999999976034814608283340930938720703125,
        "max_lon": 30.230290000000000105728759081102907657623291015625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 10:06 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 30m
Data Points: 37 AIS positions
Period: 2026-10-08T10:40:34+00:00 to 2026-10-08T17:11:13+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 390.6000000000000227373675443232059478759765625,
    "points_in_zone": 37,
    "first_point": {
        "ts": "2026-10-08T10:40:34+00:00",
        "lat": 59.884101700000002210799721069633960723876953125,
        "lon": 30.230306699999999864303390495479106903076171875
    },
    "last_point": {
        "ts": "2026-10-08T17:11:13+00:00",
        "lat": 59.8841417000000006964910426177084445953369140625,
        "lon": 30.230233299999998308749127318151295185089111328125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 10:06 UTC 75.0% ▼

Duration: 6h 30m
Radius: 12 meters
Data Points: 37 AIS positions
Centroid: 59.8842, 30.2302
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 11.5,
    "duration_minutes": 390.6000000000000227373675443232059478759765625,
    "points": 37,
    "centroid": {
        "lat": 59.88417878108106862100612488575279712677001953125,
        "lon": 30.23021071351350741451824433170258998870849609375
    },
    "bbox": {
        "min_lat": 59.884101700000002210799721069633960723876953125,
        "min_lon": 30.230084999999998984776539145968854427337646484375,
        "max_lat": 59.8842599999999976034814608283340930938720703125,
        "max_lon": 30.230308300000000798490873421542346477508544921875
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Sts🛰️✗ Ust-Luga/St. Petersburg Approach

Oct 8, 2026 10:03 UTC 70/100 ▼

Vessel A: Ryazan (RYAZAN) RUSSIA

Vessel B: IMO 8711760 (KAPITAN DZHUMANOV) Russia

Minimum Distance: 301 meters
Average Distance: 306 meters
Duration: 1h 16m
Period: 2026-10-08T10:03:13+00:00 to 2026-10-08T11:19:36+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: 70/100

Moderate-confidence STS candidate. Two tankers (RYAZAN and KAPITAN DZHUMANOV) maintained close proximity (min 301m, avg 306m) for 76 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	10/25	Min distance 301m, avg 306m
Duration	15/25	Duration 76 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 Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-08T14:45:01.718598+00:00

Show Raw Evidence JSON

{
    "vessel_a": {
        "mmsi": 273357610,
        "imo": 8915548,
        "name": "RYAZAN",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273294560,
        "imo": 8711760,
        "name": "KAPITAN DZHUMANOV",
        "flag": "Russia"
    },
    "min_distance_m": 301,
    "avg_distance_m": 305.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 3.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 76.400000000000005684341886080801486968994140625,
    "overlap_duration_s": 4583,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-08T10:03:13+00:00",
        "end": "2026-10-08T11:19:36+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": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 301m, avg 306m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 76 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": "Moderate-confidence STS candidate. Two tankers (RYAZAN and KAPITAN DZHUMANOV) maintained close proximity (min 301m, avg 306m) for 76 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": "not_found",
        "centroid": {
            "lat": 59.88302449999999765850589028559625148773193359375,
            "lon": 30.228678800000000848058334668166935443878173828125
        },
        "time_window": {
            "start_ts": "2026-10-08T10:03:13+00:00",
            "end_ts": "2026-10-08T11:19:36+00:00"
        },
        "searched_at": "2026-10-08T14:45:01.718598+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 09:25 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 33m
Data Points: 38 AIS positions
Period: 2026-10-08T09:25:44+00:00 to 2026-10-08T15:59:34+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 393.80000000000001136868377216160297393798828125,
    "points_in_zone": 38,
    "first_point": {
        "ts": "2026-10-08T09:25:44+00:00",
        "lat": 59.8841632999999973208105075173079967498779296875,
        "lon": 30.230360000000001008402250590734183788299560546875
    },
    "last_point": {
        "ts": "2026-10-08T15:59:34+00:00",
        "lat": 59.884146700000002283559297211468219757080078125,
        "lon": 30.23014330000000171594365383498370647430419921875
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 09:25 UTC 75.0% ▼

Duration: 6h 33m
Radius: 13 meters
Data Points: 38 AIS positions
Centroid: 59.8842, 30.2302
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 12.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 393.80000000000001136868377216160297393798828125,
    "points": 38,
    "centroid": {
        "lat": 59.88417284473684532031256821937859058380126953125,
        "lon": 30.230229118421053868814851739443838596343994140625
    },
    "bbox": {
        "min_lat": 59.884101700000002210799721069633960723876953125,
        "min_lon": 30.230084999999998984776539145968854427337646484375,
        "max_lat": 59.8842599999999976034814608283340930938720703125,
        "max_lon": 30.23036330000000049267327995039522647857666015625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 08:03 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 32m
Data Points: 41 AIS positions
Period: 2026-10-08T08:40:13+00:00 to 2026-10-08T15:12:14+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 392,
    "points_in_zone": 41,
    "first_point": {
        "ts": "2026-10-08T08:40:13+00:00",
        "lat": 59.8841867000000007692506187595427036285400390625,
        "lon": 30.230303299999999211422618827782571315765380859375
    },
    "last_point": {
        "ts": "2026-10-08T15:12:14+00:00",
        "lat": 59.8841699999999974579623085446655750274658203125,
        "lon": 30.23011999999999943611328490078449249267578125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 08:03 UTC 75.0% ▼

Duration: 6h 32m
Radius: 13 meters
Data Points: 41 AIS positions
Centroid: 59.8842, 30.2302
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 12.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 392,
    "points": 41,
    "centroid": {
        "lat": 59.884173936585369801832712255418300628662109375,
        "lon": 30.230240443902435032441644580103456974029541015625
    },
    "bbox": {
        "min_lat": 59.884101700000002210799721069633960723876953125,
        "min_lon": 30.230084999999998984776539145968854427337646484375,
        "max_lat": 59.8842599999999976034814608283340930938720703125,
        "max_lon": 30.23036330000000049267327995039522647857666015625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 07:08 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 34m
Data Points: 47 AIS positions
Period: 2026-10-08T07:23:23+00:00 to 2026-10-08T13:57:54+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 394.5,
    "points_in_zone": 47,
    "first_point": {
        "ts": "2026-10-08T07:23:23+00:00",
        "lat": 59.8841699999999974579623085446655750274658203125,
        "lon": 30.23027499999999889723767410032451152801513671875
    },
    "last_point": {
        "ts": "2026-10-08T13:57:54+00:00",
        "lat": 59.88421170000000159916453412733972072601318359375,
        "lon": 30.23014669999999881611074670217931270599365234375
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 07:08 UTC 75.0% ▼

Duration: 6h 34m
Radius: 13 meters
Data Points: 47 AIS positions
Centroid: 59.8842, 30.2303
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 13.300000000000000710542735760100185871124267578125,
    "duration_minutes": 394.5,
    "points": 47,
    "centroid": {
        "lat": 59.88417790212765368096370366401970386505126953125,
        "lon": 30.2302576234042561509340885095298290252685546875
    },
    "bbox": {
        "min_lat": 59.884101700000002210799721069633960723876953125,
        "min_lon": 30.230084999999998984776539145968854427337646484375,
        "max_lat": 59.8842599999999976034814608283340930938720703125,
        "max_lon": 30.23036330000000049267327995039522647857666015625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 06:01 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 37m
Data Points: 46 AIS positions
Period: 2026-10-08T06:40:33+00:00 to 2026-10-08T13:18:13+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 397.69999999999998863131622783839702606201171875,
    "points_in_zone": 46,
    "first_point": {
        "ts": "2026-10-08T06:40:33+00:00",
        "lat": 59.8841417000000006964910426177084445953369140625,
        "lon": 30.230211700000001684429662418551743030548095703125
    },
    "last_point": {
        "ts": "2026-10-08T13:18:13+00:00",
        "lat": 59.88425829999999905339791439473628997802734375,
        "lon": 30.23018330000000020163497538305819034576416015625
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 06:01 UTC 75.0% ▼

Duration: 6h 37m
Radius: 11 meters
Data Points: 46 AIS positions
Centroid: 59.8842, 30.2303
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 10.699999999999999289457264239899814128875732421875,
    "duration_minutes": 397.69999999999998863131622783839702606201171875,
    "points": 46,
    "centroid": {
        "lat": 59.88417173260869930118133197538554668426513671875,
        "lon": 30.230267280434784282761029317043721675872802734375
    },
    "bbox": {
        "min_lat": 59.884101700000002210799721069633960723876953125,
        "min_lon": 30.23018330000000020163497538305819034576416015625,
        "max_lat": 59.88425829999999905339791439473628997802734375,
        "max_lon": 30.23036330000000049267327995039522647857666015625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 05:05 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 31m
Data Points: 46 AIS positions
Period: 2026-10-08T05:42:32+00:00 to 2026-10-08T12:13:44+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 391.19999999999998863131622783839702606201171875,
    "points_in_zone": 46,
    "first_point": {
        "ts": "2026-10-08T05:42:32+00:00",
        "lat": 59.88415169999999676520019420422613620758056640625,
        "lon": 30.2302217000000013058524928055703639984130859375
    },
    "last_point": {
        "ts": "2026-10-08T12:13:44+00:00",
        "lat": 59.88419830000000132486093207262456417083740234375,
        "lon": 30.230231700000000927275323192588984966278076171875
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 05:05 UTC 75.0% ▼

Duration: 6h 31m
Radius: 8 meters
Data Points: 46 AIS positions
Centroid: 59.8842, 30.2303
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 8.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 391.19999999999998863131622783839702606201171875,
    "points": 46,
    "centroid": {
        "lat": 59.88416061521740374473665724508464336395263671875,
        "lon": 30.2302557239130464949994347989559173583984375
    },
    "bbox": {
        "min_lat": 59.884101700000002210799721069633960723876953125,
        "min_lon": 30.230109999999999814690454513765871524810791015625,
        "max_lat": 59.88421670000000318623278872109949588775634765625,
        "max_lon": 30.23036330000000049267327995039522647857666015625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 04:05 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 27m
Data Points: 47 AIS positions
Period: 2026-10-08T04:42:54+00:00 to 2026-10-08T11:10:13+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 387.30000000000001136868377216160297393798828125,
    "points_in_zone": 47,
    "first_point": {
        "ts": "2026-10-08T04:42:54+00:00",
        "lat": 59.884178300000002082015271298587322235107421875,
        "lon": 30.230251700000000170120983966626226902008056640625
    },
    "last_point": {
        "ts": "2026-10-08T11:10:13+00:00",
        "lat": 59.884133300000002009255695156753063201904296875,
        "lon": 30.230308300000000798490873421542346477508544921875
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 04:05 UTC 75.0% ▼

Duration: 6h 27m
Radius: 8 meters
Data Points: 47 AIS positions
Centroid: 59.8842, 30.2303
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 8.199999999999999289457264239899814128875732421875,
    "duration_minutes": 387.30000000000001136868377216160297393798828125,
    "points": 47,
    "centroid": {
        "lat": 59.8841603893616962750456877984106540679931640625,
        "lon": 30.230251382978718055483113857917487621307373046875
    },
    "bbox": {
        "min_lat": 59.884101700000002210799721069633960723876953125,
        "min_lon": 30.230109999999999814690454513765871524810791015625,
        "max_lat": 59.88421670000000318623278872109949588775634765625,
        "max_lon": 30.23036330000000049267327995039522647857666015625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 03:16 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 28m
Data Points: 45 AIS positions
Period: 2026-10-08T03:58:52+00:00 to 2026-10-08T10:27:12+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 388.30000000000001136868377216160297393798828125,
    "points_in_zone": 45,
    "first_point": {
        "ts": "2026-10-08T03:58:52+00:00",
        "lat": 59.8841283000000004221874405629932880401611328125,
        "lon": 30.230045000000000499085217597894370555877685546875
    },
    "last_point": {
        "ts": "2026-10-08T10:27:12+00:00",
        "lat": 59.88412670000000304071363643743097782135009765625,
        "lon": 30.230258299999999138663042685948312282562255859375
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 03:16 UTC 75.0% ▼

Duration: 6h 28m
Radius: 12 meters
Data Points: 45 AIS positions
Centroid: 59.8842, 30.2302
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 11.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 388.30000000000001136868377216160297393798828125,
    "points": 45,
    "centroid": {
        "lat": 59.88416788888888930841858382336795330047607421875,
        "lon": 30.23023736888890056206946610473096370697021484375
    },
    "bbox": {
        "min_lat": 59.88411500000000131649358081631362438201904296875,
        "min_lon": 30.230045000000000499085217597894370555877685546875,
        "max_lat": 59.88421670000000318623278872109949588775634765625,
        "max_lon": 30.23036330000000049267327995039522647857666015625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 02:00 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 26m
Data Points: 45 AIS positions
Period: 2026-10-08T02:59:42+00:00 to 2026-10-08T09:25:44+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 386,
    "points_in_zone": 45,
    "first_point": {
        "ts": "2026-10-08T02:59:42+00:00",
        "lat": 59.88416500000000297632141155190765857696533203125,
        "lon": 30.230239999999998445900928345508873462677001953125
    },
    "last_point": {
        "ts": "2026-10-08T09:25:44+00:00",
        "lat": 59.8841632999999973208105075173079967498779296875,
        "lon": 30.230360000000001008402250590734183788299560546875
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 02:00 UTC 75.0% ▼

Duration: 6h 26m
Radius: 25 meters
Data Points: 45 AIS positions
Centroid: 59.8842, 30.2302
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 24.800000000000000710542735760100185871124267578125,
    "duration_minutes": 386,
    "points": 45,
    "centroid": {
        "lat": 59.88416714888889913481762050651013851165771484375,
        "lon": 30.230211888888899096627937979064881801605224609375
    },
    "bbox": {
        "min_lat": 59.8840067000000004782123141922056674957275390625,
        "min_lon": 30.2298617000000007237758836708962917327880859375,
        "max_lat": 59.88424499999999994770405464805662631988525390625,
        "max_lon": 30.230360000000001008402250590734183788299560546875
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Oct 8, 2026 01:57 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 23m
Data Points: 50 AIS positions
Period: 2026-10-08T01:57:22+00:00 to 2026-10-08T08:20:34+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 383.19999999999998863131622783839702606201171875,
    "points_in_zone": 50,
    "first_point": {
        "ts": "2026-10-08T01:57:22+00:00",
        "lat": 59.89305499999999682358975405804812908172607421875,
        "lon": 30.2103350000000006048139766789972782135009765625
    },
    "last_point": {
        "ts": "2026-10-08T08:20:34+00:00",
        "lat": 59.8841800000000006320988177321851253509521484375,
        "lon": 30.23024170000000054869815357960760593414306640625
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Oct 8, 2026 01:57 UTC 75.0% ▼

Duration: 6h 23m
Radius: 1,377 meters
Data Points: 50 AIS positions
Centroid: 59.8847, 30.2280
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 1376.700000000000045474735088646411895751953125,
    "duration_minutes": 383.19999999999998863131622783839702606201171875,
    "points": 50,
    "centroid": {
        "lat": 59.88473590200000984395956038497388362884521484375,
        "lon": 30.227985770000000087520675151608884334564208984375
    },
    "bbox": {
        "min_lat": 59.883863300000001572698238305747509002685546875,
        "min_lon": 30.20467000000000012960299500264227390289306640625,
        "max_lat": 59.89305499999999682358975405804812908172607421875,
        "max_lon": 30.230283299999999968576958053745329380035400390625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Ais Gap🛰️✗ Gulf of Finland Exit

Sep 30, 2026 08:01 UTC 70.0% ▼

Gap Duration: 5h 27m
Last Seen: 2026-09-30T08:01:41+00:00 at 60.0228, 29.2015 (Zone: Gulf of Finland Exit)
Next Seen: 2026-09-30T13:28:53+00:00 at 59.8928, 30.1418

🛰️ Gap Corroboration

✗ No Imagery

These are snapshots that may corroborate presence during the gap. They do not reconstruct a continuous route.

SAR Imagery (Sentinel-1)

Status: ✗ No SAR coverage

No Sentinel-1 scenes covering corridor and time window

VIIRS Thermal Anomaly

Status: ✗ No detections

No VIIRS thermal/light detections in corridor

Searched: 2026-09-30T13:45:01.526353+00:00

Show Raw Evidence JSON

{
    "gap_minutes": 327.19999999999998863131622783839702606201171875,
    "last_seen": {
        "ts": "2026-09-30T08:01:41+00:00",
        "lat": 60.0227866999999974950696923770010471343994140625,
        "lon": 29.201499999999999346300683100707828998565673828125,
        "sog": 7.70000000000000017763568394002504646778106689453125,
        "zone_id": "russia_gulf_finland_exit"
    },
    "next_seen": {
        "ts": "2026-09-30T13:28:53+00:00",
        "lat": 59.89283329999999949677658150903880596160888671875,
        "lon": 30.141838299999999861711330595426261425018310546875,
        "zone_ids": [
            "russia_ust_luga_approach"
        ]
    },
    "gap_enrichment": {
        "status": "not_found",
        "corridor": {
            "start": {
                "lat": 60.0227866999999974950696923770010471343994140625,
                "lon": 29.201499999999999346300683100707828998565673828125,
                "ts": "2026-09-30T08:01:41+00:00"
            },
            "end": {
                "lat": 59.89283329999999949677658150903880596160888671875,
                "lon": 30.141838299999999861711330595426261425018310546875,
                "ts": "2026-09-30T13:28:53+00:00"
            },
            "bbox": {
                "min_lat": 59.7126530000000030895535019226372241973876953125,
                "min_lon": 28.841598999999998653720467700622975826263427734375,
                "max_lat": 60.20296700000000100772012956440448760986328125,
                "max_lon": 30.501740000000001629132384550757706165313720703125
            },
            "buffer_km": 20
        },
        "sar": {
            "status": "not_found",
            "notes": "No Sentinel-1 scenes covering corridor and time window"
        },
        "viirs": {
            "status": "not_found",
            "notes": "No VIIRS thermal\/light detections in corridor"
        },
        "searched_at": "2026-09-30T13:45:01.526353+00:00"
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga Terminal Complex

Sep 30, 2026 06:18 UTC 80.0% ▼

Zone: Ust-Luga Terminal Complex
Duration: 1h 31m
Data Points: 12 AIS positions
Period: 2026-09-30T06:18:02+00:00 to 2026-09-30T07:49:11+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga",
    "zone_name": "Ust-Luga Terminal Complex",
    "dwell_minutes": 91.2000000000000028421709430404007434844970703125,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-09-30T06:18:02+00:00",
        "lat": 59.91706669999999945730451145209372043609619140625,
        "lon": 28.8199283000000008314600563608109951019287109375
    },
    "last_point": {
        "ts": "2026-09-30T07:49:11+00:00",
        "lat": 60.01981169999999821129677002318203449249267578125,
        "lon": 29.14822170000000056688804761506617069244384765625
    }
}

Methodology: 2026.01.18

Sts🛰️? Ust-Luga/St. Petersburg Approach

Sep 23, 2026 07:05 UTC 95/100 ▼

Vessel A: IMO 8711760 (KAPITAN DZHUMANOV) Russia

Vessel B: IMO 9010931 (GALA) RUSSIA

Minimum Distance: 91 meters
Average Distance: 92 meters
Duration: 3h 8m
Period: 2026-09-23T07:05:11+00:00 to 2026-09-23T10:13:51+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 (KAPITAN DZHUMANOV and GALA) maintained close proximity (min 90m, avg 92m) for 189 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 90m, avg 92m
Duration	25/25	Duration 189 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: S1D_IW_GRDH_1SDV_20260923T041654_20260923T041719_004700_008C98_65F9_COG • Acquired: 2026-09-23T04:16:54.473280Z • Platform: sentinel-1d

Click image to view full size

Searched: 2026-09-23T13:45:14.781344+00:00

{
    "vessel_a": {
        "mmsi": 273294560,
        "imo": 8711760,
        "name": "KAPITAN DZHUMANOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273273250,
        "imo": 9010931,
        "name": "GALA",
        "flag": "RUSSIA"
    },
    "min_distance_m": 90.5,
    "avg_distance_m": 91.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 188.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 11320,
    "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": "2026-09-23T07:05:11+00:00",
        "end": "2026-09-23T10:13:51+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "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 90m, avg 92m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 189 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 (KAPITAN DZHUMANOV and GALA) maintained close proximity (min 90m, avg 92m) for 189 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": 59.88394960000000111222107079811394214630126953125,
            "lon": 30.229487899999998745670382049866020679473876953125
        },
        "time_window": {
            "start_ts": "2026-09-23T07:05:11+00:00",
            "end_ts": "2026-09-23T10:13:51+00:00"
        },
        "searched_at": "2026-09-23T13:45:14.781344+00:00",
        "scene_id": "S1D_IW_GRDH_1SDV_20260923T041654_20260923T041719_004700_008C98_65F9_COG",
        "scene_datetime": "2026-09-23T04:16:54.473280Z",
        "platform": "sentinel-1d",
        "bbox": {
            "min_lon": 28.51016800000000017689671949483454227447509765625,
            "min_lat": 58.78296300000000229601937462575733661651611328125,
            "max_lon": 33.7292709999999971159923006780445575714111328125,
            "max_lat": 60.7093320000000034042386687360703945159912109375
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1374765_thumbnail_20260923134519.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1374765_thumbnail_20260923134519.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Sep 23, 2026 07:02 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 3h 11m
Data Points: 3 AIS positions
Period: 2026-09-23T07:02:10+00:00 to 2026-09-23T10:13:51+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 191.69999999999998863131622783839702606201171875,
    "points_in_zone": 3,
    "first_point": {
        "ts": "2026-09-23T07:02:10+00:00",
        "lat": 59.88420500000000146201273309998214244842529296875,
        "lon": 30.230181699999999267447492456994950771331787109375
    },
    "last_point": {
        "ts": "2026-09-23T10:13:51+00:00",
        "lat": 59.88415669999999835226844879798591136932373046875,
        "lon": 30.230198300000001410126060363836586475372314453125
    }
}

Sep 23, 2026 06:01 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 4h 12m
Data Points: 17 AIS positions
Period: 2026-09-23T06:01:51+00:00 to 2026-09-23T10:13:51+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 252,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-09-23T06:01:51+00:00",
        "lat": 59.88416500000000297632141155190765857696533203125,
        "lon": 30.2301700000000010959411156363785266876220703125
    },
    "last_point": {
        "ts": "2026-09-23T10:13:51+00:00",
        "lat": 59.88415669999999835226844879798591136932373046875,
        "lon": 30.230198300000001410126060363836586475372314453125
    }
}

Loiter Ust-Luga/St. Petersburg Approach

Sep 23, 2026 06:01 UTC 75.0% ▼

Duration: 4h 12m
Radius: 5 meters
Data Points: 17 AIS positions
Centroid: 59.8842, 30.2302
Zone: Ust-Luga/St. Petersburg Approach

{
    "radius_m": 4.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 252,
    "points": 17,
    "centroid": {
        "lat": 59.88417411764704212373544578440487384796142578125,
        "lon": 30.23016196470587857447753776796162128448486328125
    },
    "bbox": {
        "min_lat": 59.88414499999999662804839317686855792999267578125,
        "min_lon": 30.230081699999999500505509786307811737060546875,
        "max_lat": 59.88420500000000146201273309998214244842529296875,
        "max_lon": 30.230238299999999895817381911911070346832275390625
    },
    "zone_id": "russia_ust_luga_approach"
}

Sts Ust-Luga/St. Petersburg Approach

Sep 23, 2026 06:01 UTC 95/100 ▼

Vessel A: IMO 8711760 (KAPITAN DZHUMANOV) Russia

Vessel B: IMO 9010931 (GALA) RUSSIA

Minimum Distance: 86 meters
Average Distance: 95 meters
Duration: 4h 12m
Period: 2026-09-23T06:01:51+00:00 to 2026-09-23T10:13:51+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.1 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (KAPITAN DZHUMANOV and GALA) maintained close proximity (min 86m, avg 95m) for 252 minutes. Both vessels were slow-moving (avg speeds 0.0 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	25/25	Min distance 86m, avg 95m
Duration	25/25	Duration 252 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±10m
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": 273294560,
        "imo": 8711760,
        "name": "KAPITAN DZHUMANOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273273250,
        "imo": 9010931,
        "name": "GALA",
        "flag": "RUSSIA"
    },
    "min_distance_m": 85.7999999999999971578290569595992565155029296875,
    "avg_distance_m": 95,
    "distance_consistency_m": 10.300000000000000710542735760100185871124267578125,
    "duration_minutes": 252,
    "overlap_duration_s": 15120,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.1700000000000000122124532708767219446599483489990234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.6999999999999999555910790149937383830547332763671875
        }
    },
    "time_window": {
        "start": "2026-09-23T06:01:51+00:00",
        "end": "2026-09-23T10:13:51+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "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 86m, avg 95m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 252 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "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 (KAPITAN DZHUMANOV and GALA) maintained close proximity (min 86m, avg 95m) for 252 minutes. Both vessels were slow-moving (avg speeds 0.0 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

Sep 23, 2026 05:54 UTC 95/100 ▼

Vessel A: IMO 8711760 (KAPITAN DZHUMANOV) Russia

Vessel B: IMO 9010931 (GALA) RUSSIA

Minimum Distance: 86 meters
Average Distance: 99 meters
Duration: 4h 19m
Period: 2026-09-23T05:54:31+00:00 to 2026-09-23T10:13:51+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.1 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (KAPITAN DZHUMANOV and GALA) maintained close proximity (min 86m, avg 98m) for 259 minutes. Both vessels were slow-moving (avg speeds 0.0 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	25/25	Min distance 86m, avg 98m
Duration	25/25	Duration 259 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±14m
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": 273294560,
        "imo": 8711760,
        "name": "KAPITAN DZHUMANOV",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273273250,
        "imo": 9010931,
        "name": "GALA",
        "flag": "RUSSIA"
    },
    "min_distance_m": 85.7999999999999971578290569595992565155029296875,
    "avg_distance_m": 98.5,
    "distance_consistency_m": 14.300000000000000710542735760100185871124267578125,
    "duration_minutes": 259.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 15560,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.13000000000000000444089209850062616169452667236328125,
    "speed_b_std": 0.2600000000000000088817841970012523233890533447265625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.13000000000000000444089209850062616169452667236328125,
            "max_sog": 0.6999999999999999555910790149937383830547332763671875
        }
    },
    "time_window": {
        "start": "2026-09-23T05:54:31+00:00",
        "end": "2026-09-23T10:13:51+00:00"
    },
    "points_count": {
        "vessel_a": 19,
        "vessel_b": 19
    },
    "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 86m, avg 98m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 259 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b114m"
            },
            "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 (KAPITAN DZHUMANOV and GALA) maintained close proximity (min 86m, avg 98m) for 259 minutes. Both vessels were slow-moving (avg speeds 0.0 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

Sep 23, 2026 05:00 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 5h 13m
Data Points: 30 AIS positions
Period: 2026-09-23T05:00:12+00:00 to 2026-09-23T10:13:51+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 313.6000000000000227373675443232059478759765625,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-09-23T05:00:12+00:00",
        "lat": 59.88413669999999910942278802394866943359375,
        "lon": 30.230148299999999750298229628242552280426025390625
    },
    "last_point": {
        "ts": "2026-09-23T10:13:51+00:00",
        "lat": 59.88415669999999835226844879798591136932373046875,
        "lon": 30.230198300000001410126060363836586475372314453125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Sep 23, 2026 05:00 UTC 75.0% ▼

Duration: 5h 13m
Radius: 7 meters
Data Points: 30 AIS positions
Centroid: 59.8842, 30.2302
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 6.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 313.6000000000000227373675443232059478759765625,
    "points": 30,
    "centroid": {
        "lat": 59.8841630533333244557070429436862468719482421875,
        "lon": 30.230153109999999827550709596835076808929443359375
    },
    "bbox": {
        "min_lat": 59.88412000000000290356183541007339954376220703125,
        "min_lon": 30.23006170000000025765984901227056980133056640625,
        "max_lat": 59.88420500000000146201273309998214244842529296875,
        "max_lon": 30.230238299999999895817381911911070346832275390625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Sep 23, 2026 04:17 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 5h 56m
Data Points: 39 AIS positions
Period: 2026-09-23T04:17:22+00:00 to 2026-09-23T10:13:51+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 356.5,
    "points_in_zone": 39,
    "first_point": {
        "ts": "2026-09-23T04:17:22+00:00",
        "lat": 59.883876700000001847001840360462665557861328125,
        "lon": 30.2280583000000007132257451303303241729736328125
    },
    "last_point": {
        "ts": "2026-09-23T10:13:51+00:00",
        "lat": 59.88415669999999835226844879798591136932373046875,
        "lon": 30.230198300000001410126060363836586475372314453125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach

Sep 23, 2026 04:17 UTC 75.0% ▼

Duration: 5h 56m
Radius: 119 meters
Data Points: 39 AIS positions
Centroid: 59.8842, 30.2301
Zone: Ust-Luga/St. Petersburg Approach

Show Raw Evidence JSON

{
    "radius_m": 119,
    "duration_minutes": 356.5,
    "points": 39,
    "centroid": {
        "lat": 59.88415713333332490719840279780328273773193359375,
        "lon": 30.230108333333337355952608049847185611724853515625
    },
    "bbox": {
        "min_lat": 59.883876700000001847001840360462665557861328125,
        "min_lon": 30.2280583000000007132257451303303241729736328125,
        "max_lat": 59.88420500000000146201273309998214244842529296875,
        "max_lon": 30.230238299999999895817381911911070346832275390625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Sep 22, 2026 21:50 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 27m
Data Points: 2 AIS positions
Period: 2026-09-22T21:50:00+00:00 to 2026-09-23T04:17:22+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 387.3999999999999772626324556767940521240234375,
    "points_in_zone": 2,
    "first_point": {
        "ts": "2026-09-22T21:50:00+00:00",
        "lat": 59.8839583000000033052856451831758022308349609375,
        "lon": 30.225281700000000029149305191822350025177001953125
    },
    "last_point": {
        "ts": "2026-09-23T04:17:22+00:00",
        "lat": 59.883876700000001847001840360462665557861328125,
        "lon": 30.2280583000000007132257451303303241729736328125
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Sep 22, 2026 15:19 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 30m
Data Points: 2 AIS positions
Period: 2026-09-22T15:19:30+00:00 to 2026-09-22T21:50:00+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 390.5,
    "points_in_zone": 2,
    "first_point": {
        "ts": "2026-09-22T15:19:30+00:00",
        "lat": 59.8838616999999970857970765791833400726318359375,
        "lon": 30.225351700000000931822796701453626155853271484375
    },
    "last_point": {
        "ts": "2026-09-22T21:50:00+00:00",
        "lat": 59.8839583000000033052856451831758022308349609375,
        "lon": 30.225281700000000029149305191822350025177001953125
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Sep 22, 2026 14:13 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 1h 6m
Data Points: 3 AIS positions
Period: 2026-09-22T14:13:16+00:00 to 2026-09-22T15:19:30+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 66.2000000000000028421709430404007434844970703125,
    "points_in_zone": 3,
    "first_point": {
        "ts": "2026-09-22T14:13:16+00:00",
        "lat": 59.88795669999999660149114788509905338287353515625,
        "lon": 30.216578299999998336033968371339142322540283203125
    },
    "last_point": {
        "ts": "2026-09-22T15:19:30+00:00",
        "lat": 59.8838616999999970857970765791833400726318359375,
        "lon": 30.225351700000000931822796701453626155853271484375
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Sep 22, 2026 13:03 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 2h 16m
Data Points: 15 AIS positions
Period: 2026-09-22T13:03:32+00:00 to 2026-09-22T15:19:30+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 136,
    "points_in_zone": 15,
    "first_point": {
        "ts": "2026-09-22T13:03:32+00:00",
        "lat": 59.93179500000000103909769677557051181793212890625,
        "lon": 29.95580830000000105428625829517841339111328125
    },
    "last_point": {
        "ts": "2026-09-22T15:19:30+00:00",
        "lat": 59.8838616999999970857970765791833400726318359375,
        "lon": 30.225351700000000931822796701453626155853271484375
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Sep 22, 2026 12:49 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 2h 30m
Data Points: 18 AIS positions
Period: 2026-09-22T12:49:12+00:00 to 2026-09-22T15:19:30+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 150.30000000000001136868377216160297393798828125,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-09-22T12:49:12+00:00",
        "lat": 59.94240500000000082536644185893237590789794921875,
        "lon": 29.89665169999999960737113724462687969207763671875
    },
    "last_point": {
        "ts": "2026-09-22T15:19:30+00:00",
        "lat": 59.8838616999999970857970765791833400726318359375,
        "lon": 30.225351700000000931822796701453626155853271484375
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Sep 20, 2026 21:11 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 1h 18m
Data Points: 22 AIS positions
Period: 2026-09-20T21:11:17+00:00 to 2026-09-20T22:29:37+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 78.2999999999999971578290569595992565155029296875,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-09-20T21:11:17+00:00",
        "lat": 59.88415499999999980218490236438810825347900390625,
        "lon": 30.225578299999998677094481536187231540679931640625
    },
    "last_point": {
        "ts": "2026-09-20T22:29:37+00:00",
        "lat": 59.90357000000000198269844986498355865478515625,
        "lon": 30.0901716999999990775904734618961811065673828125
    }
}

Methodology: 2026.01.18

Sts🛰️? Ust-Luga/St. Petersburg Approach

Sep 10, 2026 17:44 UTC 80/100 ▼

Vessel A: IMO 8711760 (KAPITAN DZHUMANOV) Russia

Vessel B: IMO 8724767 (DMITRIY RULEVSKIY) RUSSIA

Minimum Distance: 187 meters
Average Distance: 198 meters
Duration: 1h 5m
Period: 2026-09-10T17:44:35+00:00 to 2026-09-10T18:49:53+00:00
Vessel A Avg Speed: 0.0 knots
Vessel B Avg Speed: 0.2 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (KAPITAN DZHUMANOV and DMITRIY RULEVSKIY) maintained close proximity (min 187m, avg 198m) for 65 minutes. Both vessels were slow-moving (avg speeds 0.0 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 187m, avg 198m
Duration	15/25	Duration 65 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±16m
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_20260910T153917_20260910T153942_009387_012AB9_84CF_COG • Acquired: 2026-09-10T15:39:17.083397Z • Platform: sentinel-1c

Click image to view full size

Searched: 2026-09-10T20:15:01.740616+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": 187,
    "avg_distance_m": 198.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 15.699999999999999289457264239899814128875732421875,
    "duration_minutes": 65.2999999999999971578290569595992565155029296875,
    "overlap_duration_s": 3918,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.1499999999999999944488848768742172978818416595458984375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-09-10T17:44:35+00:00",
        "end": "2026-09-10T18:49:53+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "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 187m, avg 198m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 65 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b116m"
            },
            "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 (KAPITAN DZHUMANOV and DMITRIY RULEVSKIY) maintained close proximity (min 187m, avg 198m) for 65 minutes. Both vessels were slow-moving (avg speeds 0.0 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."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.882985800000000153886503539979457855224609375,
            "lon": 30.224721699999999913188730715773999691009521484375
        },
        "time_window": {
            "start_ts": "2026-09-10T17:44:35+00:00",
            "end_ts": "2026-09-10T18:49:53+00:00"
        },
        "searched_at": "2026-09-10T20:15:01.740616+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260910T153917_20260910T153942_009387_012AB9_84CF_COG",
        "scene_datetime": "2026-09-10T15:39:17.083397Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 27.491651999999998423618308152072131633758544921875,
            "min_lat": 58.3136099999999970577846397645771503448486328125,
            "max_lon": 32.63137100000000145882950164377689361572265625,
            "max_lat": 60.2372510000000005447873263619840145111083984375
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1267335_thumbnail_20260910201506.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/09\/event_1267335_thumbnail_20260910201506.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Sep 10, 2026 17:44 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 1h 5m
Data Points: 2 AIS positions
Period: 2026-09-10T17:44:35+00:00 to 2026-09-10T18:49:53+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 65.2999999999999971578290569595992565155029296875,
    "points_in_zone": 2,
    "first_point": {
        "ts": "2026-09-10T17:44:35+00:00",
        "lat": 59.8838999999999970214048516936600208282470703125,
        "lon": 30.225345000000000794670995674096047878265380859375
    },
    "last_point": {
        "ts": "2026-09-10T18:49:53+00:00",
        "lat": 59.8837333000000029414877644740045070648193359375,
        "lon": 30.22535500000000041609382606111466884613037109375
    }
}

Sep 10, 2026 13:25 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 5h 24m
Data Points: 4 AIS positions
Period: 2026-09-10T13:25:25+00:00 to 2026-09-10T18:49:53+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 324.5,
    "points_in_zone": 4,
    "first_point": {
        "ts": "2026-09-10T13:25:25+00:00",
        "lat": 59.89449669999999770197973703034222126007080078125,
        "lon": 30.133413300000000845102476887404918670654296875
    },
    "last_point": {
        "ts": "2026-09-10T18:49:53+00:00",
        "lat": 59.8837333000000029414877644740045070648193359375,
        "lon": 30.22535500000000041609382606111466884613037109375
    }
}

Ais Gap🛰️✗ Ust-Luga/St. Petersburg Approach

Sep 7, 2026 12:56 UTC 70.0% ▼

Gap Duration: 4h 54m
Last Seen: 2026-09-07T12:56:36+00:00 at 59.8871, 30.2045 (Zone: Ust-Luga/St. Petersburg Approach)
Next Seen: 2026-09-07T17:51:30+00:00 at 59.8884, 30.2151

🛰️ Gap Corroboration

✗ No Imagery

These are snapshots that may corroborate presence during the gap. They do not reconstruct a continuous route.

SAR Imagery (Sentinel-1)

Status: ✗ No SAR coverage

No Sentinel-1 scenes covering corridor and time window

VIIRS Thermal Anomaly

Status: ✗ No detections

No VIIRS thermal/light detections in corridor

Searched: 2026-09-07T18:15:01.365503+00:00

{
    "gap_minutes": 294.8999999999999772626324556767940521240234375,
    "last_seen": {
        "ts": "2026-09-07T12:56:36+00:00",
        "lat": 59.8871400000000022600943339057266712188720703125,
        "lon": 30.204461699999999524379745707847177982330322265625,
        "sog": 5.4000000000000003552713678800500929355621337890625,
        "zone_id": "russia_ust_luga_approach"
    },
    "next_seen": {
        "ts": "2026-09-07T17:51:30+00:00",
        "lat": 59.8883517000000011876181815750896930694580078125,
        "lon": 30.2150682999999986577677191235125064849853515625,
        "zone_ids": [
            "russia_ust_luga_approach"
        ]
    },
    "gap_enrichment": {
        "status": "not_found",
        "corridor": {
            "start": {
                "lat": 59.8871400000000022600943339057266712188720703125,
                "lon": 30.204461699999999524379745707847177982330322265625,
                "ts": "2026-09-07T12:56:36+00:00"
            },
            "end": {
                "lat": 59.8883517000000011876181815750896930694580078125,
                "lon": 30.2150682999999986577677191235125064849853515625,
                "ts": "2026-09-07T17:51:30+00:00"
            },
            "bbox": {
                "min_lat": 59.70696000000000225327312364242970943450927734375,
                "min_lon": 29.845318999999999931560523691587150096893310546875,
                "max_lat": 60.06853199999999759484126116149127483367919921875,
                "max_lon": 30.57421099999999825058694113977253437042236328125
            },
            "buffer_km": 20
        },
        "sar": {
            "status": "not_found",
            "notes": "No Sentinel-1 scenes covering corridor and time window"
        },
        "viirs": {
            "status": "not_found",
            "notes": "No VIIRS thermal\/light detections in corridor"
        },
        "searched_at": "2026-09-07T18:15:01.365503+00:00"
    }
}

Sep 7, 2026 12:56 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 4h 54m
Data Points: 2 AIS positions
Period: 2026-09-07T12:56:36+00:00 to 2026-09-07T17:51:30+00:00

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 294.8999999999999772626324556767940521240234375,
    "points_in_zone": 2,
    "first_point": {
        "ts": "2026-09-07T12:56:36+00:00",
        "lat": 59.8871400000000022600943339057266712188720703125,
        "lon": 30.204461699999999524379745707847177982330322265625
    },
    "last_point": {
        "ts": "2026-09-07T17:51:30+00:00",
        "lat": 59.8883517000000011876181815750896930694580078125,
        "lon": 30.2150682999999986577677191235125064849853515625
    }
}