IMO 9156981
Vessel information
Vessel Name
G.ROSSINI
IMO Number
9156981
MMSI
273217520
Vessel Type
Tanker - Hazard C (Minor)
Flag
🇷🇺 Russia
Call Sign
UBHT7
Length
94 m
Beam
12 m
Detected Events (18)
Sts🛰️?
Ust-Luga Terminal Complex
Vessel A: IMO 9156981 (G.ROSSINI) Russia
Vessel B: Megion (MEGION) RUSSIA
- Minimum Distance: 446 meters
- Average Distance: 470 meters
- Duration: 51 minutes
- Period: 2026-05-04T05:06:41+00:00 to 2026-05-04T05:58:08+00:00
- Vessel A Avg Speed: 0.4 knots
- Vessel B Avg Speed: 0.4 knots
- Zone: Ust-Luga Terminal Complex
Confidence Analysis
Score: 57/100
Low-confidence STS candidate - may warrant review. Two tankers (G.ROSSINI and MEGION) maintained close proximity (min 446m, avg 470m) for 52 minutes. Both vessels were slow-moving (avg speeds 0.4 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga Terminal Complex, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 5/25 | Min distance 446m, avg 470m |
| Duration | 10/25 | Duration 52 minutes |
| Speed Stability | 17/20 | both nearly stationary; stable speeds |
| Distance Consistency | 15/15 | Distance variance ±9m |
| Isolation | 5/10 | Isolation data not available |
| Context | 5/5 | In monitored zone: Ust-Luga Terminal Complex |
🛰️ Satellite Corroboration
SAR Inconclusive
Satellite imagery available but requires review
Preview available for manual review
Scene: S1C_EW_GRDM_1SDH_20260504T044051_20260504T044151_007499_00F398_3E10_COG • Acquired: 2026-05-04T04:40:51.268359Z • Platform: sentinel-1c
Show Raw Evidence JSON
{
"vessel_a": {
"mmsi": 273217520,
"imo": 9156981,
"name": "G.ROSSINI",
"flag": "Russia"
},
"vessel_b": {
"mmsi": 273355640,
"imo": 9590137,
"name": "MEGION",
"flag": "RUSSIA"
},
"min_distance_m": 446.1000000000000227373675443232059478759765625,
"avg_distance_m": 470.3999999999999772626324556767940521240234375,
"distance_consistency_m": 9.0999999999999996447286321199499070644378662109375,
"duration_minutes": 51.5,
"overlap_duration_s": 3087,
"speed_a_avg": 0.39000000000000001332267629550187848508358001708984375,
"speed_a_std": 0.2800000000000000266453525910037569701671600341796875,
"speed_b_avg": 0.409999999999999975575093458246556110680103302001953125,
"speed_b_std": 0.440000000000000002220446049250313080847263336181640625,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.39000000000000001332267629550187848508358001708984375,
"max_sog": 0.8000000000000000444089209850062616169452667236328125
},
"vessel_b": {
"avg_sog": 0.409999999999999975575093458246556110680103302001953125,
"max_sog": 1.100000000000000088817841970012523233890533447265625
}
},
"time_window": {
"start": "2026-05-04T05:06:41+00:00",
"end": "2026-05-04T05:58:08+00:00"
},
"points_count": {
"vessel_a": 16,
"vessel_b": 16
},
"zone_id": "russia_ust_luga",
"zone_name": "Ust-Luga Terminal Complex",
"score": {
"value": 57,
"components": {
"distance_tightness": {
"score": 5,
"max": 25,
"detail": "Min distance 446m, avg 470m"
},
"duration": {
"score": 10,
"max": 25,
"detail": "Duration 52 minutes"
},
"speed_stability": {
"score": 17,
"max": 20,
"detail": "both nearly stationary; stable speeds"
},
"distance_consistency": {
"score": 15,
"max": 15,
"detail": "Distance variance \u00b19m"
},
"isolation": {
"score": 5,
"max": 10,
"detail": "Isolation data not available"
},
"context": {
"score": 5,
"max": 5,
"detail": "In monitored zone: Ust-Luga Terminal Complex"
}
},
"summary": "Low-confidence STS candidate - may warrant review. Two tankers (G.ROSSINI and MEGION) maintained close proximity (min 446m, avg 470m) for 52 minutes. Both vessels were slow-moving (avg speeds 0.4 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga Terminal Complex, a known STS activity area."
},
"sar": {
"status": "inconclusive",
"centroid": {
"lat": 59.69430479999999761275830678641796112060546875,
"lon": 28.346211700000001343369149253703653812408447265625
},
"time_window": {
"start_ts": "2026-05-04T05:06:41+00:00",
"end_ts": "2026-05-04T05:58:08+00:00"
},
"searched_at": "2026-05-04T06:15:01.794092+00:00",
"scene_id": "S1C_EW_GRDM_1SDH_20260504T044051_20260504T044151_007499_00F398_3E10_COG",
"scene_datetime": "2026-05-04T04:40:51.268359Z",
"platform": "sentinel-1c",
"bbox": {
"min_lon": 21.9211600000000004229150363244116306304931640625,
"min_lat": 58.01894800000000174122760654427111148834228515625,
"max_lon": 30.81303199999999975489117787219583988189697265625,
"max_lat": 62.32932699999999925921656540594995021820068359375
},
"assets": {
"preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/05\/event_482236_thumbnail_20260504061506.png",
"stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/05\/event_482236_thumbnail_20260504061506.png",
"source": "copernicus_dataspace"
},
"notes": "Preview available for manual review"
}
}
Methodology: 2026.01.18
Loiter
Ust-Luga Terminal Complex
- Duration: 1h 51m
- Radius: 41 meters
- Data Points: 19 AIS positions
- Centroid: 59.6950, 28.3423
- Zone: Ust-Luga Terminal Complex
Show Raw Evidence JSON
{
"radius_m": 40.89999999999999857891452847979962825775146484375,
"duration_minutes": 111,
"points": 19,
"centroid": {
"lat": 59.695029199999993352321325801312923431396484375,
"lon": 28.342281842105261802089444245211780071258544921875
},
"bbox": {
"min_lat": 59.69468169999999673791535315103828907012939453125,
"min_lon": 28.3418683000000015681507647968828678131103515625,
"max_lat": 59.69531330000000224345058086328208446502685546875,
"max_lon": 28.342618300000001596572474227286875247955322265625
},
"zone_id": "russia_ust_luga"
}
Methodology: 2026.01.18
Zone Dwell
Ust-Luga Terminal Complex
- Zone: Ust-Luga Terminal Complex
- Duration: 1h 51m
- Data Points: 19 AIS positions
- Period: 2026-05-04T05:02:21+00:00 to 2026-05-04T06:53:23+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_ust_luga",
"zone_name": "Ust-Luga Terminal Complex",
"dwell_minutes": 111,
"points_in_zone": 19,
"first_point": {
"ts": "2026-05-04T05:02:21+00:00",
"lat": 59.69531330000000224345058086328208446502685546875,
"lon": 28.342618300000001596572474227286875247955322265625
},
"last_point": {
"ts": "2026-05-04T06:53:23+00:00",
"lat": 59.694833299999999098872649483382701873779296875,
"lon": 28.3418683000000015681507647968828678131103515625
}
}
Methodology: 2026.01.18
Zone Dwell
Ust-Luga Terminal Complex
- Zone: Ust-Luga Terminal Complex
- Duration: 4h 19m
- Data Points: 21 AIS positions
- Period: 2026-05-04T02:33:53+00:00 to 2026-05-04T06:53:23+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_ust_luga",
"zone_name": "Ust-Luga Terminal Complex",
"dwell_minutes": 259.5,
"points_in_zone": 21,
"first_point": {
"ts": "2026-05-04T02:33:53+00:00",
"lat": 59.890749999999997044142219237983226776123046875,
"lon": 28.499141699999999133297023945488035678863525390625
},
"last_point": {
"ts": "2026-05-04T06:53:23+00:00",
"lat": 59.694833299999999098872649483382701873779296875,
"lon": 28.3418683000000015681507647968828678131103515625
}
}
Methodology: 2026.01.18
Zone Dwell
Ust-Luga Terminal Complex
- Zone: Ust-Luga Terminal Complex
- Duration: 2h 50m
- Data Points: 2 AIS positions
- Period: 2026-02-07T07:05:29+00:00 to 2026-02-07T09:56:19+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_ust_luga",
"zone_name": "Ust-Luga Terminal Complex",
"dwell_minutes": 170.80000000000001136868377216160297393798828125,
"points_in_zone": 2,
"first_point": {
"ts": "2026-02-07T07:05:29+00:00",
"lat": 60.118508300000002009255695156753063201904296875,
"lon": 28.3146966999999989411662681959569454193115234375
},
"last_point": {
"ts": "2026-02-07T09:56:19+00:00",
"lat": 60.11858829999999898063833825290203094482421875,
"lon": 28.314536700000001445687303203158080577850341796875
}
}
Methodology: 2026.01.18
Zone Dwell
Ust-Luga Terminal Complex
- Zone: Ust-Luga Terminal Complex
- Duration: 3h 20m
- Data Points: 5 AIS positions
- Period: 2026-02-07T06:36:09+00:00 to 2026-02-07T09:56:19+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_ust_luga",
"zone_name": "Ust-Luga Terminal Complex",
"dwell_minutes": 200.19999999999998863131622783839702606201171875,
"points_in_zone": 5,
"first_point": {
"ts": "2026-02-07T06:36:09+00:00",
"lat": 60.13848329999999720030245953239500522613525390625,
"lon": 28.28114169999999916171873337589204311370849609375
},
"last_point": {
"ts": "2026-02-07T09:56:19+00:00",
"lat": 60.11858829999999898063833825290203094482421875,
"lon": 28.314536700000001445687303203158080577850341796875
}
}
Methodology: 2026.01.18
Zone Dwell
Gulf of Finland Central
- Zone: Gulf of Finland Central
- Duration: 3h 30m
- Data Points: 5 AIS positions
- Period: 2026-02-07T03:11:29+00:00 to 2026-02-07T06:41:29+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_gulf_finland_central",
"zone_name": "Gulf of Finland Central",
"dwell_minutes": 210,
"points_in_zone": 5,
"first_point": {
"ts": "2026-02-07T03:11:29+00:00",
"lat": 60.19874329999999673646016162820160388946533203125,
"lon": 27.76249500000000125510268844664096832275390625
},
"last_point": {
"ts": "2026-02-07T06:41:29+00:00",
"lat": 60.13650499999999965439201332628726959228515625,
"lon": 28.282364999999998644852894358336925506591796875
}
}
Methodology: 2026.01.18
Zone Dwell
Primorsk Terminal
- Zone: Primorsk Terminal
- Duration: 1h 1m
- Data Points: 15 AIS positions
- Period: 2026-02-07T02:14:08+00:00 to 2026-02-07T03:15:20+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_primorsk",
"zone_name": "Primorsk Terminal",
"dwell_minutes": 61.2000000000000028421709430404007434844970703125,
"points_in_zone": 15,
"first_point": {
"ts": "2026-02-07T02:14:08+00:00",
"lat": 60.252538299999997661871020682156085968017578125,
"lon": 27.841816699999998974135451135225594043731689453125
},
"last_point": {
"ts": "2026-02-07T03:15:20+00:00",
"lat": 60.1903582999999997582563082687556743621826171875,
"lon": 27.762301699999998305656845332123339176177978515625
}
}
Methodology: 2026.01.18
Zone Dwell
Primorsk Terminal
- Zone: Primorsk Terminal
- Duration: 2h 5m
- Data Points: 18 AIS positions
- Period: 2026-02-07T01:09:29+00:00 to 2026-02-07T03:15:20+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_primorsk",
"zone_name": "Primorsk Terminal",
"dwell_minutes": 125.7999999999999971578290569595992565155029296875,
"points_in_zone": 18,
"first_point": {
"ts": "2026-02-07T01:09:29+00:00",
"lat": 60.287368299999997134364093653857707977294921875,
"lon": 27.893139999999998934754330548457801342010498046875
},
"last_point": {
"ts": "2026-02-07T03:15:20+00:00",
"lat": 60.1903582999999997582563082687556743621826171875,
"lon": 27.762301699999998305656845332123339176177978515625
}
}
Methodology: 2026.01.18
Zone Dwell
Primorsk Terminal
- Zone: Primorsk Terminal
- Duration: 2h 38m
- Data Points: 20 AIS positions
- Period: 2026-02-07T00:36:38+00:00 to 2026-02-07T03:15:20+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_primorsk",
"zone_name": "Primorsk Terminal",
"dwell_minutes": 158.69999999999998863131622783839702606201171875,
"points_in_zone": 20,
"first_point": {
"ts": "2026-02-07T00:36:38+00:00",
"lat": 60.336911700000001701482688076794147491455078125,
"lon": 27.965578300000000666614141664467751979827880859375
},
"last_point": {
"ts": "2026-02-07T03:15:20+00:00",
"lat": 60.1903582999999997582563082687556743621826171875,
"lon": 27.762301699999998305656845332123339176177978515625
}
}
Methodology: 2026.01.18
Zone Dwell
Ust-Luga Terminal Complex
- Zone: Ust-Luga Terminal Complex
- Duration: 1h 54m
- Data Points: 6 AIS positions
- Period: 2026-01-19T15:05:56+00:00 to 2026-01-19T17:00:33+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_ust_luga",
"zone_name": "Ust-Luga Terminal Complex",
"dwell_minutes": 114.599999999999994315658113919198513031005859375,
"points_in_zone": 6,
"first_point": {
"ts": "2026-01-19T15:05:56+00:00",
"lat": 59.705753299999997807390172965824604034423828125,
"lon": 28.38070330000000041081875679083168506622314453125
},
"last_point": {
"ts": "2026-01-19T17:00:33+00:00",
"lat": 59.70607499999999845385900698602199554443359375,
"lon": 28.3800667000000004236426320858299732208251953125
}
}
Methodology: 2026.01.18
Zone Dwell
Ust-Luga Terminal Complex
- Zone: Ust-Luga Terminal Complex
- Duration: 2h 12m
- Data Points: 8 AIS positions
- Period: 2026-01-19T14:47:39+00:00 to 2026-01-19T17:00:33+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_ust_luga",
"zone_name": "Ust-Luga Terminal Complex",
"dwell_minutes": 132.900000000000005684341886080801486968994140625,
"points_in_zone": 8,
"first_point": {
"ts": "2026-01-19T14:47:39+00:00",
"lat": 59.7057317000000011830707080662250518798828125,
"lon": 28.380726700000000306545189232565462589263916015625
},
"last_point": {
"ts": "2026-01-19T17:00:33+00:00",
"lat": 59.70607499999999845385900698602199554443359375,
"lon": 28.3800667000000004236426320858299732208251953125
}
}
Methodology: 2026.01.18
Zone Dwell
Ust-Luga Terminal Complex
- Zone: Ust-Luga Terminal Complex
- Duration: 3h 57m
- Data Points: 16 AIS positions
- Period: 2026-01-19T13:03:06+00:00 to 2026-01-19T17:00:33+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_ust_luga",
"zone_name": "Ust-Luga Terminal Complex",
"dwell_minutes": 237.400000000000005684341886080801486968994140625,
"points_in_zone": 16,
"first_point": {
"ts": "2026-01-19T13:03:06+00:00",
"lat": 59.70625170000000281333996099419891834259033203125,
"lon": 28.379491699999999099190972629003226757049560546875
},
"last_point": {
"ts": "2026-01-19T17:00:33+00:00",
"lat": 59.70607499999999845385900698602199554443359375,
"lon": 28.3800667000000004236426320858299732208251953125
}
}
Methodology: 2026.01.18
Loiter
Ust-Luga Terminal Complex
- Duration: 3h 57m
- Radius: 79 meters
- Data Points: 16 AIS positions
- Centroid: 59.7058, 28.3806
- Zone: Ust-Luga Terminal Complex
Show Raw Evidence JSON
{
"radius_m": 78.7000000000000028421709430404007434844970703125,
"duration_minutes": 237.400000000000005684341886080801486968994140625,
"points": 16,
"centroid": {
"lat": 59.7058010375000094427377916872501373291015625,
"lon": 28.380568018749993797200659173540771007537841796875
},
"bbox": {
"min_lat": 59.70561330000000310747054754756391048431396484375,
"min_lon": 28.379491699999999099190972629003226757049560546875,
"max_lat": 59.70625170000000281333996099419891834259033203125,
"max_lon": 28.380813299999999799183569848537445068359375
},
"zone_id": "russia_ust_luga"
}
Methodology: 2026.01.18
Loiter
Ust-Luga Terminal Complex
- Duration: 4h 9m
- Radius: 1,687 meters
- Data Points: 19 AIS positions
- Centroid: 59.7072, 28.3810
- Zone: Ust-Luga Terminal Complex
Show Raw Evidence JSON
{
"radius_m": 1686.90000000000009094947017729282379150390625,
"duration_minutes": 249.80000000000001136868377216160297393798828125,
"points": 19,
"centroid": {
"lat": 59.70720412105263363855556235648691654205322265625,
"lon": 28.3810250894736810778340441174805164337158203125
},
"zone_id": "russia_ust_luga"
}
Methodology: 2026.01.18
Zone Dwell
Ust-Luga Terminal Complex
- Zone: Ust-Luga Terminal Complex
- Duration: 4h 57m
- Data Points: 28 AIS positions
- Period: 2026-01-19T12:03:30+00:00 to 2026-01-19T17:00:33+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_ust_luga",
"zone_name": "Ust-Luga Terminal Complex",
"dwell_minutes": 297.1000000000000227373675443232059478759765625,
"points_in_zone": 28,
"first_point": {
"ts": "2026-01-19T12:03:30+00:00",
"lat": 59.8133949999999998681232682429254055023193359375,
"lon": 28.420093300000001335092747467570006847381591796875
},
"last_point": {
"ts": "2026-01-19T17:00:33+00:00",
"lat": 59.70607499999999845385900698602199554443359375,
"lon": 28.3800667000000004236426320858299732208251953125
}
}
Methodology: 2026.01.18
Zone Dwell
Ust-Luga Terminal Complex
- Zone: Ust-Luga Terminal Complex
- Duration: 5h 30m
- Data Points: 31 AIS positions
- Period: 2026-01-19T11:30:00+00:00 to 2026-01-19T17:00:33+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_ust_luga",
"zone_name": "Ust-Luga Terminal Complex",
"dwell_minutes": 330.6000000000000227373675443232059478759765625,
"points_in_zone": 31,
"first_point": {
"ts": "2026-01-19T11:30:00+00:00",
"lat": 59.89811499999999711008058511652052402496337890625,
"lon": 28.5073517000000009602445061318576335906982421875
},
"last_point": {
"ts": "2026-01-19T17:00:33+00:00",
"lat": 59.70607499999999845385900698602199554443359375,
"lon": 28.3800667000000004236426320858299732208251953125
}
}
Methodology: 2026.01.18
Zone Dwell
Ust-Luga Terminal Complex
- Zone: ust_luga
- Duration: 6h 11m
- Data Points: 36 AIS positions
- Period: 2026-01-19T10:48:43+00:00 to 2026-01-19T17:00:33+00:00
Show Raw Evidence JSON
{
"zone_id": "ust_luga",
"zone_name": "Ust-Luga Oil Terminal",
"dwell_minutes": 371.80000000000001136868377216160297393798828125,
"points_in_zone": 36,
"first_point": {
"ts": "2026-01-19T10:48:43+00:00",
"lat": 59.9996866999999980407665134407579898834228515625,
"lon": 28.594328300000000808722688816487789154052734375
},
"last_point": {
"ts": "2026-01-19T17:00:33+00:00",
"lat": 59.70607499999999845385900698602199554443359375,
"lon": 28.3800667000000004236426320858299732208251953125
}
}
Methodology: 2026.01.18
Recent Position Data
| Time (UTC) | Lat | Lon | Speed | Course | Zone |
|---|---|---|---|---|---|
| May 4 06:53 | 59.6948 | 28.3419 | 4.7 kn | 307.0° | Ust-Luga Terminal Complex |
| May 4 05:58 | 59.6950 | 28.3422 | 0.0 kn | 229.3° | Ust-Luga Terminal Complex |
| May 4 05:55 | 59.6950 | 28.3422 | 0.7 kn | 182.1° | Ust-Luga Terminal Complex |
| May 4 05:53 | 59.6951 | 28.3422 | 0.4 kn | 349.3° | Ust-Luga Terminal Complex |
| May 4 05:49 | 59.6950 | 28.3422 | 0.2 kn | 333.1° | Ust-Luga Terminal Complex |
| May 4 05:47 | 59.6950 | 28.3422 | 0.3 kn | 127.4° | Ust-Luga Terminal Complex |
| May 4 05:44 | 59.6950 | 28.3422 | 0.1 kn | 310.3° | Ust-Luga Terminal Complex |
| May 4 05:42 | 59.6949 | 28.3422 | 0.1 kn | 213.6° | Ust-Luga Terminal Complex |
| May 4 05:39 | 59.6949 | 28.3422 | 0.6 kn | 275.8° | Ust-Luga Terminal Complex |
| May 4 05:31 | 59.6947 | 28.3425 | 0.7 kn | 182.5° | Ust-Luga Terminal Complex |
| May 4 05:24 | 59.6951 | 28.3424 | 0.3 kn | 360.0° | Ust-Luga Terminal Complex |
| May 4 05:22 | 59.6949 | 28.3424 | 0.8 kn | 360.0° | Ust-Luga Terminal Complex |
| May 4 05:20 | 59.6951 | 28.3425 | 0.4 kn | 360.0° | Ust-Luga Terminal Complex |
| May 4 05:13 | 59.6952 | 28.3423 | 0.1 kn | 360.0° | Ust-Luga Terminal Complex |
| May 4 05:11 | 59.6952 | 28.3424 | 0.1 kn | 360.0° | Ust-Luga Terminal Complex |
| May 4 05:08 | 59.6951 | 28.3423 | 0.7 kn | 360.0° | Ust-Luga Terminal Complex |
| May 4 05:06 | 59.6951 | 28.3422 | 0.7 kn | 360.0° | Ust-Luga Terminal Complex |
| May 4 05:04 | 59.6951 | 28.3423 | 0.9 kn | 360.0° | Ust-Luga Terminal Complex |
| May 4 05:02 | 59.6953 | 28.3426 | 2.1 kn | 183.5° | Ust-Luga Terminal Complex |
| May 4 02:39 | 59.8801 | 28.4841 | 14.1 kn | 206.2° | Ust-Luga Terminal Complex |
Showing 20 of 21 recent positions.
Data Source
Vessel observed through FleetLeaks' AIS monitoring system in zones of interest. Identity and position data derived from AIS broadcasts and public maritime databases.
Disclaimer: AIS data can be spoofed or falsified. Vessel identities should be independently verified before making compliance decisions.