Vessel information
Detected Events (17)
- Zone: Strait of Gibraltar Surveillance Zone
- Duration: 1h 46m
- Data Points: 34 AIS positions
- Period: 2026-07-28T03:01:15+00:00 to 2026-07-28T04:47:23+00:00
Show Raw Evidence JSON
{
"zone_id": "discovered_001",
"zone_name": "Strait of Gibraltar Surveillance Zone",
"dwell_minutes": 106.099999999999994315658113919198513031005859375,
"points_in_zone": 34,
"first_point": {
"ts": "2026-07-28T03:01:15+00:00",
"lat": 35.01017829999999975143509800545871257781982421875,
"lon": 129.066023300000011886368156410753726959228515625
},
"last_point": {
"ts": "2026-07-28T04:47:23+00:00",
"lat": 35.0291567000000014786564861424267292022705078125,
"lon": 129.09052170000001069638528861105442047119140625
}
}- Duration: 1h 40m
- Radius: 942 meters
- Data Points: 29 AIS positions
- Centroid: 35.0104, 129.0662
- Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
"radius_m": 941.799999999999954525264911353588104248046875,
"duration_minutes": 100.2999999999999971578290569595992565155029296875,
"points": 29,
"centroid": {
"lat": 35.0104156344827543989595142193138599395751953125,
"lon": 129.066189996551742069641477428376674652099609375
},
"bbox": {
"min_lat": 35.00975329999999985375325195491313934326171875,
"min_lon": 129.065596699999986185503075830638408660888671875,
"max_lat": 35.017341700000002902015694417059421539306640625,
"max_lon": 129.07215669999999363426468335092067718505859375
},
"zone_id": "discovered_001"
}- Zone: Strait of Gibraltar Surveillance Zone
- Duration: 2h 44m
- Data Points: 46 AIS positions
- Period: 2026-07-28T02:03:08+00:00 to 2026-07-28T04:47:23+00:00
Show Raw Evidence JSON
{
"zone_id": "discovered_001",
"zone_name": "Strait of Gibraltar Surveillance Zone",
"dwell_minutes": 164.19999999999998863131622783839702606201171875,
"points_in_zone": 46,
"first_point": {
"ts": "2026-07-28T02:03:08+00:00",
"lat": 35.01022669999999692436176701448857784271240234375,
"lon": 129.0660599999999931242200545966625213623046875
},
"last_point": {
"ts": "2026-07-28T04:47:23+00:00",
"lat": 35.0291567000000014786564861424267292022705078125,
"lon": 129.09052170000001069638528861105442047119140625
}
}- Duration: 2h 38m
- Radius: 952 meters
- Data Points: 41 AIS positions
- Centroid: 35.0103, 129.0662
- Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
"radius_m": 951.8999999999999772626324556767940521240234375,
"duration_minutes": 158.400000000000005684341886080801486968994140625,
"points": 41,
"centroid": {
"lat": 35.01031309268294222647455171681940555572509765625,
"lon": 129.066175200000003542299964465200901031494140625
},
"bbox": {
"min_lat": 35.00975329999999985375325195491313934326171875,
"min_lon": 129.065596699999986185503075830638408660888671875,
"max_lat": 35.017341700000002902015694417059421539306640625,
"max_lon": 129.07215669999999363426468335092067718505859375
},
"zone_id": "discovered_001"
}- Minimum Distance: 48 meters
- Average Distance: 56 meters
- Duration: 49 minutes
- Period: 2026-07-28T01:03:13+00:00 to 2026-07-28T01:52:28+00:00
- Vessel A Avg Speed: 0.2 knots
- Vessel B Avg Speed: 0.1 knots
- Zone: Strait of Gibraltar Surveillance Zone
Confidence Analysis
High-confidence STS candidate. Two tankers (SANLOUIS and SUNGJIN ACE) maintained close proximity (min 48m, avg 56m) for 49 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 25/25 | Min distance 48m, avg 56m |
| Duration | 10/25 | Duration 49 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: Strait of Gibraltar Surveillance Zone |
🛰️ Satellite Corroboration
No satellite imagery for this time/location
No Sentinel-1 scenes covering AOI and time window
Show Raw Evidence JSON
{
"vessel_a": {
"mmsi": 440707950,
"name": "SANLOUIS",
"flag": "REPUBLIC OF KOREA"
},
"vessel_b": {
"mmsi": 440156960,
"name": "SUNGJIN ACE",
"flag": "REPUBLIC OF KOREA"
},
"min_distance_m": 47.7999999999999971578290569595992565155029296875,
"avg_distance_m": 55.7999999999999971578290569595992565155029296875,
"distance_consistency_m": 9.800000000000000710542735760100185871124267578125,
"duration_minutes": 49.2000000000000028421709430404007434844970703125,
"overlap_duration_s": 2955,
"speed_a_avg": 0.190000000000000002220446049250313080847263336181640625,
"speed_a_std": 0.13000000000000000444089209850062616169452667236328125,
"speed_b_avg": 0.0899999999999999966693309261245303787291049957275390625,
"speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.190000000000000002220446049250313080847263336181640625,
"max_sog": 0.40000000000000002220446049250313080847263336181640625
},
"vessel_b": {
"avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
"max_sog": 0.200000000000000011102230246251565404236316680908203125
}
},
"time_window": {
"start": "2026-07-28T01:03:13+00:00",
"end": "2026-07-28T01:52:28+00:00"
},
"points_count": {
"vessel_a": 16,
"vessel_b": 16
},
"zone_id": "discovered_001",
"zone_name": "Strait of Gibraltar Surveillance Zone",
"score": {
"value": 80,
"components": {
"distance_tightness": {
"score": 25,
"max": 25,
"detail": "Min distance 48m, avg 56m"
},
"duration": {
"score": 10,
"max": 25,
"detail": "Duration 49 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: Strait of Gibraltar Surveillance Zone"
}
},
"summary": "High-confidence STS candidate. Two tankers (SANLOUIS and SUNGJIN ACE) maintained close proximity (min 48m, avg 56m) for 49 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
},
"sar": {
"status": "not_found",
"centroid": {
"lat": 35.01038989999999984092937665991485118865966796875,
"lon": 129.066105399999997871418599970638751983642578125
},
"time_window": {
"start_ts": "2026-07-28T01:03:13+00:00",
"end_ts": "2026-07-28T01:52:28+00:00"
},
"searched_at": "2026-07-28T07:45:02.020749+00:00",
"notes": "No Sentinel-1 scenes covering AOI and time window"
}
}- Zone: Strait of Gibraltar Surveillance Zone
- Duration: 3h 46m
- Data Points: 64 AIS positions
- Period: 2026-07-28T01:00:26+00:00 to 2026-07-28T04:47:23+00:00
Show Raw Evidence JSON
{
"zone_id": "discovered_001",
"zone_name": "Strait of Gibraltar Surveillance Zone",
"dwell_minutes": 226.900000000000005684341886080801486968994140625,
"points_in_zone": 64,
"first_point": {
"ts": "2026-07-28T01:00:26+00:00",
"lat": 35.0099950000000035288394428789615631103515625,
"lon": 129.06630499999999983629095368087291717529296875
},
"last_point": {
"ts": "2026-07-28T04:47:23+00:00",
"lat": 35.0291567000000014786564861424267292022705078125,
"lon": 129.09052170000001069638528861105442047119140625
}
}- Duration: 3h 41m
- Radius: 958 meters
- Data Points: 59 AIS positions
- Centroid: 35.0103, 129.0662
- Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
"radius_m": 957.799999999999954525264911353588104248046875,
"duration_minutes": 221.099999999999994315658113919198513031005859375,
"points": 59,
"centroid": {
"lat": 35.01025955084747209866691264323890209197998046875,
"lon": 129.066154544067757115044514648616313934326171875
},
"bbox": {
"min_lat": 35.00975329999999985375325195491313934326171875,
"min_lon": 129.065596699999986185503075830638408660888671875,
"max_lat": 35.017341700000002902015694417059421539306640625,
"max_lon": 129.07215669999999363426468335092067718505859375
},
"zone_id": "discovered_001"
}- Minimum Distance: 48 meters
- Average Distance: 83 meters
- Duration: 1h 8m
- Period: 2026-07-28T00:43:40+00:00 to 2026-07-28T01:52:28+00:00
- Vessel A Avg Speed: 0.3 knots
- Vessel B Avg Speed: 0.3 knots
- Zone: Strait of Gibraltar Surveillance Zone
Confidence Analysis
Moderate-confidence STS candidate. Two tankers (SANLOUIS and SUNGJIN ACE) maintained close proximity (min 48m, avg 83m) for 69 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.3 knots). Moderate distance variation observed during the encounter. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 25/25 | Min distance 48m, avg 83m |
| Duration | 15/25 | Duration 69 minutes |
| Speed Stability | 14/20 | both nearly stationary; somewhat variable speeds |
| Distance Consistency | 8/15 | Distance variance ±87m |
| Isolation | 5/10 | Isolation data not available |
| Context | 5/5 | In monitored zone: Strait of Gibraltar Surveillance Zone |
Show Raw Evidence JSON
{
"vessel_a": {
"mmsi": 440707950,
"name": "SANLOUIS",
"flag": "REPUBLIC OF KOREA"
},
"vessel_b": {
"mmsi": 440156960,
"name": "SUNGJIN ACE",
"flag": "REPUBLIC OF KOREA"
},
"min_distance_m": 47.7999999999999971578290569595992565155029296875,
"avg_distance_m": 83.2000000000000028421709430404007434844970703125,
"distance_consistency_m": 87,
"duration_minutes": 68.7999999999999971578290569595992565155029296875,
"overlap_duration_s": 4128,
"speed_a_avg": 0.2800000000000000266453525910037569701671600341796875,
"speed_a_std": 0.2800000000000000266453525910037569701671600341796875,
"speed_b_avg": 0.2800000000000000266453525910037569701671600341796875,
"speed_b_std": 0.58999999999999996891375531049561686813831329345703125,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.2800000000000000266453525910037569701671600341796875,
"max_sog": 1.1999999999999999555910790149937383830547332763671875
},
"vessel_b": {
"avg_sog": 0.2800000000000000266453525910037569701671600341796875,
"max_sog": 2
}
},
"time_window": {
"start": "2026-07-28T00:43:40+00:00",
"end": "2026-07-28T01:52:28+00:00"
},
"points_count": {
"vessel_a": 20,
"vessel_b": 20
},
"zone_id": "discovered_001",
"zone_name": "Strait of Gibraltar Surveillance Zone",
"score": {
"value": 72,
"components": {
"distance_tightness": {
"score": 25,
"max": 25,
"detail": "Min distance 48m, avg 83m"
},
"duration": {
"score": 15,
"max": 25,
"detail": "Duration 69 minutes"
},
"speed_stability": {
"score": 14,
"max": 20,
"detail": "both nearly stationary; somewhat variable speeds"
},
"distance_consistency": {
"score": 8,
"max": 15,
"detail": "Distance variance \u00b187m"
},
"isolation": {
"score": 5,
"max": 10,
"detail": "Isolation data not available"
},
"context": {
"score": 5,
"max": 5,
"detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
}
},
"summary": "Moderate-confidence STS candidate. Two tankers (SANLOUIS and SUNGJIN ACE) maintained close proximity (min 48m, avg 83m) for 69 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.3 knots). Moderate distance variation observed during the encounter. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
}
}- Duration: 4h 4m
- Radius: 976 meters
- Data Points: 66 AIS positions
- Centroid: 35.0102, 129.0659
- Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
"radius_m": 975.799999999999954525264911353588104248046875,
"duration_minutes": 244.900000000000005684341886080801486968994140625,
"points": 66,
"centroid": {
"lat": 35.0101953560606062865190324373543262481689453125,
"lon": 129.065924566666666351011372171342372894287109375
},
"bbox": {
"min_lat": 35.00794170000000349318725056946277618408203125,
"min_lon": 129.05909500000001344233169220387935638427734375,
"max_lat": 35.017341700000002902015694417059421539306640625,
"max_lon": 129.07215669999999363426468335092067718505859375
},
"zone_id": "discovered_001"
}- Zone: Strait of Gibraltar Surveillance Zone
- Duration: 4h 20m
- Data Points: 75 AIS positions
- Period: 2026-07-28T00:26:40+00:00 to 2026-07-28T04:47:23+00:00
Show Raw Evidence JSON
{
"zone_id": "discovered_001",
"zone_name": "Strait of Gibraltar Surveillance Zone",
"dwell_minutes": 260.69999999999998863131622783839702606201171875,
"points_in_zone": 75,
"first_point": {
"ts": "2026-07-28T00:26:40+00:00",
"lat": 35.0272532999999981484506861306726932525634765625,
"lon": 129.078273300000006429399945773184299468994140625
},
"last_point": {
"ts": "2026-07-28T04:47:23+00:00",
"lat": 35.0291567000000014786564861424267292022705078125,
"lon": 129.09052170000001069638528861105442047119140625
}
}- Zone: Strait of Gibraltar Surveillance Zone
- Duration: 1h 26m
- Data Points: 30 AIS positions
- Period: 2026-07-16T03:01:48+00:00 to 2026-07-16T04:28:30+00:00
Show Raw Evidence JSON
{
"zone_id": "discovered_001",
"zone_name": "Strait of Gibraltar Surveillance Zone",
"dwell_minutes": 86.7000000000000028421709430404007434844970703125,
"points_in_zone": 30,
"first_point": {
"ts": "2026-07-16T03:01:48+00:00",
"lat": 35.01104670000000140817064675502479076385498046875,
"lon": 129.0529983000000129322870634496212005615234375
},
"last_point": {
"ts": "2026-07-16T04:28:30+00:00",
"lat": 35.0303550000000001318767317570745944976806640625,
"lon": 129.079743299999989858406479470431804656982421875
}
}- Zone: Strait of Gibraltar Surveillance Zone
- Duration: 2h 21m
- Data Points: 44 AIS positions
- Period: 2026-07-16T02:07:20+00:00 to 2026-07-16T04:28:30+00:00
Show Raw Evidence JSON
{
"zone_id": "discovered_001",
"zone_name": "Strait of Gibraltar Surveillance Zone",
"dwell_minutes": 141.19999999999998863131622783839702606201171875,
"points_in_zone": 44,
"first_point": {
"ts": "2026-07-16T02:07:20+00:00",
"lat": 35.0113367000000010875737643800675868988037109375,
"lon": 129.0527382999999872481566853821277618408203125
},
"last_point": {
"ts": "2026-07-16T04:28:30+00:00",
"lat": 35.0303550000000001318767317570745944976806640625,
"lon": 129.079743299999989858406479470431804656982421875
}
}- Duration: 2h 8m
- Radius: 71 meters
- Data Points: 42 AIS positions
- Centroid: 35.0111, 129.0531
- Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
"radius_m": 71.400000000000005684341886080801486968994140625,
"duration_minutes": 128.69999999999998863131622783839702606201171875,
"points": 42,
"centroid": {
"lat": 35.01108814047619688381018931977450847625732421875,
"lon": 129.053054559523815214561182074248790740966796875
},
"bbox": {
"min_lat": 35.01076669999999779747668071649968624114990234375,
"min_lon": 129.052600000000012414602679200470447540283203125,
"max_lat": 35.011611700000003111199475824832916259765625,
"max_lon": 129.05374829999999519714037887752056121826171875
},
"zone_id": "discovered_001"
}- Zone: Strait of Gibraltar Surveillance Zone
- Duration: 3h 26m
- Data Points: 62 AIS positions
- Period: 2026-07-16T01:01:36+00:00 to 2026-07-16T04:28:30+00:00
Show Raw Evidence JSON
{
"zone_id": "discovered_001",
"zone_name": "Strait of Gibraltar Surveillance Zone",
"dwell_minutes": 206.900000000000005684341886080801486968994140625,
"points_in_zone": 62,
"first_point": {
"ts": "2026-07-16T01:01:36+00:00",
"lat": 35.010750000000001591615728102624416351318359375,
"lon": 129.052825000000012778400559909641742706298828125
},
"last_point": {
"ts": "2026-07-16T04:28:30+00:00",
"lat": 35.0303550000000001318767317570745944976806640625,
"lon": 129.079743299999989858406479470431804656982421875
}
}- Duration: 3h 14m
- Radius: 218 meters
- Data Points: 60 AIS positions
- Centroid: 35.0112, 129.0528
- Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
"radius_m": 217.900000000000005684341886080801486968994140625,
"duration_minutes": 194.400000000000005684341886080801486968994140625,
"points": 60,
"centroid": {
"lat": 35.0112306983333354537535342387855052947998046875,
"lon": 129.0527616916666602264740504324436187744140625
},
"bbox": {
"min_lat": 35.0096750000000014324541552923619747161865234375,
"min_lon": 129.05071670000000949585228227078914642333984375,
"max_lat": 35.012263300000000754153006710112094879150390625,
"max_lon": 129.05374829999999519714037887752056121826171875
},
"zone_id": "discovered_001"
}- Duration: 3h 33m
- Radius: 1,489 meters
- Data Points: 66 AIS positions
- Centroid: 35.0116, 129.0534
- Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
"radius_m": 1488.5,
"duration_minutes": 213,
"points": 66,
"centroid": {
"lat": 35.01160316060605026677876594476401805877685546875,
"lon": 129.053446916666672450446640141308307647705078125
},
"bbox": {
"min_lat": 35.0096750000000014324541552923619747161865234375,
"min_lon": 129.05071670000000949585228227078914642333984375,
"max_lat": 35.0198850000000021509549696929752826690673828125,
"max_lon": 129.066278299999993350866134278476238250732421875
},
"zone_id": "discovered_001"
}- Zone: Strait of Gibraltar Surveillance Zone
- Duration: 3h 40m
- Data Points: 68 AIS positions
- Period: 2026-07-16T00:48:25+00:00 to 2026-07-16T04:28:30+00:00
Show Raw Evidence JSON
{
"zone_id": "discovered_001",
"zone_name": "Strait of Gibraltar Surveillance Zone",
"dwell_minutes": 220.099999999999994315658113919198513031005859375,
"points_in_zone": 68,
"first_point": {
"ts": "2026-07-16T00:48:25+00:00",
"lat": 35.0234650000000016234480426646769046783447265625,
"lon": 129.07013499999999339706846512854099273681640625
},
"last_point": {
"ts": "2026-07-16T04:28:30+00:00",
"lat": 35.0303550000000001318767317570745944976806640625,
"lon": 129.079743299999989858406479470431804656982421875
}
}Recent Position Data
| Time (UTC) | Lat | Lon | Speed | Course | Zone |
|---|---|---|---|---|---|
| Jul 28 04:47 | 35.0292 | 129.0905 | 11.7 kn | 52.8° | Strait of Gibraltar Surveillance Zone |
| Jul 28 04:45 | 35.0259 | 129.0852 | 11.8 kn | 53.3° | Strait of Gibraltar Surveillance Zone |
| Jul 28 04:44 | 35.0236 | 129.0815 | 11.8 kn | 53.3° | Strait of Gibraltar Surveillance Zone |
| Jul 28 04:43 | 35.0216 | 129.0784 | 11.9 kn | 49.5° | Strait of Gibraltar Surveillance Zone |
| Jul 28 04:42 | 35.0195 | 129.0753 | 11.7 kn | 50.3° | Strait of Gibraltar Surveillance Zone |
| Jul 28 04:41 | 35.0173 | 129.0722 | 12.1 kn | 52.6° | Strait of Gibraltar Surveillance Zone |
| Jul 28 04:37 | 35.0106 | 129.0657 | 0.5 kn | 68.4° | Strait of Gibraltar Surveillance Zone |
| Jul 28 04:34 | 35.0105 | 129.0656 | 0.3 kn | 75.7° | Strait of Gibraltar Surveillance Zone |
| Jul 28 04:31 | 35.0104 | 129.0656 | 0.1 kn | 86.8° | Strait of Gibraltar Surveillance Zone |
| Jul 28 04:29 | 35.0103 | 129.0656 | 0.3 kn | 150.1° | Strait of Gibraltar Surveillance Zone |
| Jul 28 04:24 | 35.0102 | 129.0658 | 0.0 kn | 255.5° | Strait of Gibraltar Surveillance Zone |
| Jul 28 04:18 | 35.0102 | 129.0661 | 0.6 kn | 351.3° | Strait of Gibraltar Surveillance Zone |
| Jul 28 04:11 | 35.0099 | 129.0661 | 0.3 kn | 13.4° | Strait of Gibraltar Surveillance Zone |
| Jul 28 04:09 | 35.0098 | 129.0661 | 0.7 kn | 37.6° | Strait of Gibraltar Surveillance Zone |
| Jul 28 04:02 | 35.0098 | 129.0660 | 0.1 kn | 75.6° | Strait of Gibraltar Surveillance Zone |
| Jul 28 03:59 | 35.0099 | 129.0660 | 0.3 kn | 158.6° | Strait of Gibraltar Surveillance Zone |
| Jul 28 03:56 | 35.0101 | 129.0659 | 0.1 kn | 202.8° | Strait of Gibraltar Surveillance Zone |
| Jul 28 03:54 | 35.0103 | 129.0659 | 0.1 kn | 144.7° | Strait of Gibraltar Surveillance Zone |
| Jul 28 03:51 | 35.0103 | 129.0659 | 0.1 kn | 102.9° | Strait of Gibraltar Surveillance Zone |
| Jul 28 03:48 | 35.0103 | 129.0659 | 0.3 kn | 250.8° | Strait of Gibraltar Surveillance Zone |
Showing 20 of 75 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.
