IMO 9183817
Vessel information
Detected Events (100)
- Minimum Distance: 68 meters
- Average Distance: 155 meters
- Duration: 40 minutes
- Period: 2026-10-23T08:06:06+00:00 to 2026-10-23T08:46:08+00:00
- Vessel A Avg Speed: 0.1 knots
- Vessel B Avg Speed: 0.1 knots
- Zone: Prigorodnoye/Sakhalin LNG
Confidence Analysis
Moderate-confidence STS candidate. Two tankers (SOLARIS and BUKHTA NAGAEVA) maintained close proximity (min 68m, avg 155m) for 40 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye/Sakhalin LNG, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 25/25 | Min distance 68m, avg 155m |
| Duration | 5/25 | Duration 40 minutes |
| Speed Stability | 20/20 | both nearly stationary; very stable speeds |
| Distance Consistency | 12/15 | Distance variance ±49m |
| Isolation | 5/10 | Isolation data not available |
| Context | 5/5 | In monitored zone: Prigorodnoye/Sakhalin LNG |
🛰️ 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": 461000248,
"imo": 9333436,
"name": "SOLARIS",
"flag": "OMAN"
},
"vessel_b": {
"mmsi": 273219140,
"imo": 9183817,
"name": "BUKHTA NAGAEVA",
"flag": "RUSSIA"
},
"min_distance_m": 68.400000000000005684341886080801486968994140625,
"avg_distance_m": 154.900000000000005684341886080801486968994140625,
"distance_consistency_m": 49.39999999999999857891452847979962825775146484375,
"duration_minutes": 40,
"overlap_duration_s": 2402,
"speed_a_avg": 0.08000000000000000166533453693773481063544750213623046875,
"speed_a_std": 0.08000000000000000166533453693773481063544750213623046875,
"speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
"speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
"max_sog": 0.200000000000000011102230246251565404236316680908203125
},
"vessel_b": {
"avg_sog": 0.059999999999999997779553950749686919152736663818359375,
"max_sog": 0.1000000000000000055511151231257827021181583404541015625
}
},
"time_window": {
"start": "2026-10-23T08:06:06+00:00",
"end": "2026-10-23T08:46:08+00:00"
},
"points_count": {
"vessel_a": 5,
"vessel_b": 5
},
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"score": {
"value": 72,
"components": {
"distance_tightness": {
"score": 25,
"max": 25,
"detail": "Min distance 68m, avg 155m"
},
"duration": {
"score": 5,
"max": 25,
"detail": "Duration 40 minutes"
},
"speed_stability": {
"score": 20,
"max": 20,
"detail": "both nearly stationary; very stable speeds"
},
"distance_consistency": {
"score": 12,
"max": 15,
"detail": "Distance variance \u00b149m"
},
"isolation": {
"score": 5,
"max": 10,
"detail": "Isolation data not available"
},
"context": {
"score": 5,
"max": 5,
"detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
}
},
"summary": "Moderate-confidence STS candidate. Two tankers (SOLARIS and BUKHTA NAGAEVA) maintained close proximity (min 68m, avg 155m) for 40 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
},
"sar": {
"status": "not_found",
"centroid": {
"lat": 46.6499450000000024374458007514476776123046875,
"lon": 142.54302999999998746716300956904888153076171875
},
"time_window": {
"start_ts": "2026-10-23T08:06:06+00:00",
"end_ts": "2026-10-23T08:46:08+00:00"
},
"searched_at": "2026-10-23T09:45:01.336324+00:00",
"notes": "No Sentinel-1 scenes covering AOI and time window"
}
}- Minimum Distance: 68 meters
- Average Distance: 155 meters
- Duration: 40 minutes
- Period: 2026-10-23T08:06:06+00:00 to 2026-10-23T08:46:08+00:00
- Vessel A Avg Speed: 0.1 knots
- Vessel B Avg Speed: 0.1 knots
- Zone: Sakhalin South Approach
Confidence Analysis
Moderate-confidence STS candidate. Two tankers (SOLARIS and BUKHTA NAGAEVA) maintained close proximity (min 68m, avg 155m) for 40 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 25/25 | Min distance 68m, avg 155m |
| Duration | 5/25 | Duration 40 minutes |
| Speed Stability | 20/20 | both nearly stationary; very stable speeds |
| Distance Consistency | 12/15 | Distance variance ±49m |
| Isolation | 5/10 | Isolation data not available |
| Context | 5/5 | In monitored zone: Sakhalin South Approach |
🛰️ 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": 461000248,
"imo": 9333436,
"name": "SOLARIS",
"flag": "OMAN"
},
"vessel_b": {
"mmsi": 273219140,
"imo": 9183817,
"name": "BUKHTA NAGAEVA",
"flag": "RUSSIA"
},
"min_distance_m": 68.400000000000005684341886080801486968994140625,
"avg_distance_m": 154.900000000000005684341886080801486968994140625,
"distance_consistency_m": 49.39999999999999857891452847979962825775146484375,
"duration_minutes": 40,
"overlap_duration_s": 2402,
"speed_a_avg": 0.08000000000000000166533453693773481063544750213623046875,
"speed_a_std": 0.08000000000000000166533453693773481063544750213623046875,
"speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
"speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
"max_sog": 0.200000000000000011102230246251565404236316680908203125
},
"vessel_b": {
"avg_sog": 0.059999999999999997779553950749686919152736663818359375,
"max_sog": 0.1000000000000000055511151231257827021181583404541015625
}
},
"time_window": {
"start": "2026-10-23T08:06:06+00:00",
"end": "2026-10-23T08:46:08+00:00"
},
"points_count": {
"vessel_a": 5,
"vessel_b": 5
},
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"score": {
"value": 72,
"components": {
"distance_tightness": {
"score": 25,
"max": 25,
"detail": "Min distance 68m, avg 155m"
},
"duration": {
"score": 5,
"max": 25,
"detail": "Duration 40 minutes"
},
"speed_stability": {
"score": 20,
"max": 20,
"detail": "both nearly stationary; very stable speeds"
},
"distance_consistency": {
"score": 12,
"max": 15,
"detail": "Distance variance \u00b149m"
},
"isolation": {
"score": 5,
"max": 10,
"detail": "Isolation data not available"
},
"context": {
"score": 5,
"max": 5,
"detail": "In monitored zone: Sakhalin South Approach"
}
},
"summary": "Moderate-confidence STS candidate. Two tankers (SOLARIS and BUKHTA NAGAEVA) maintained close proximity (min 68m, avg 155m) for 40 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area."
},
"sar": {
"status": "not_found",
"centroid": {
"lat": 46.6499450000000024374458007514476776123046875,
"lon": 142.54302999999998746716300956904888153076171875
},
"time_window": {
"start_ts": "2026-10-23T08:06:06+00:00",
"end_ts": "2026-10-23T08:46:08+00:00"
},
"searched_at": "2026-10-23T09:45:03.770125+00:00",
"notes": "No Sentinel-1 scenes covering AOI and time window"
}
}- Minimum Distance: 68 meters
- Average Distance: 155 meters
- Duration: 1h 4m
- Period: 2026-10-23T07:40:37+00:00 to 2026-10-23T08:44:54+00:00
- Vessel A Avg Speed: 0.0 knots
- Vessel B Avg Speed: 0.1 knots
- Zone: Prigorodnoye/Sakhalin LNG
Confidence Analysis
High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 68m, avg 155m) for 64 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 Prigorodnoye/Sakhalin LNG, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 25/25 | Min distance 68m, avg 155m |
| Duration | 15/25 | Duration 64 minutes |
| Speed Stability | 20/20 | both nearly stationary; very stable speeds |
| Distance Consistency | 12/15 | Distance variance ±39m |
| Isolation | 5/10 | Isolation data not available |
| Context | 5/5 | In monitored zone: Prigorodnoye/Sakhalin LNG |
🛰️ 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": 273219140,
"imo": 9183817,
"name": "BUKHTA NAGAEVA",
"flag": "RUSSIA"
},
"vessel_b": {
"mmsi": 461000248,
"imo": 9333436,
"name": "SOLARIS",
"flag": "OMAN"
},
"min_distance_m": 68.400000000000005684341886080801486968994140625,
"avg_distance_m": 154.80000000000001136868377216160297393798828125,
"distance_consistency_m": 39.2999999999999971578290569595992565155029296875,
"duration_minutes": 64.2999999999999971578290569595992565155029296875,
"overlap_duration_s": 3857,
"speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
"speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
"speed_b_avg": 0.070000000000000006661338147750939242541790008544921875,
"speed_b_std": 0.08000000000000000166533453693773481063544750213623046875,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
"max_sog": 0.1000000000000000055511151231257827021181583404541015625
},
"vessel_b": {
"avg_sog": 0.070000000000000006661338147750939242541790008544921875,
"max_sog": 0.200000000000000011102230246251565404236316680908203125
}
},
"time_window": {
"start": "2026-10-23T07:40:37+00:00",
"end": "2026-10-23T08:44:54+00:00"
},
"points_count": {
"vessel_a": 7,
"vessel_b": 7
},
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"score": {
"value": 82,
"components": {
"distance_tightness": {
"score": 25,
"max": 25,
"detail": "Min distance 68m, avg 155m"
},
"duration": {
"score": 15,
"max": 25,
"detail": "Duration 64 minutes"
},
"speed_stability": {
"score": 20,
"max": 20,
"detail": "both nearly stationary; very stable speeds"
},
"distance_consistency": {
"score": 12,
"max": 15,
"detail": "Distance variance \u00b139m"
},
"isolation": {
"score": 5,
"max": 10,
"detail": "Isolation data not available"
},
"context": {
"score": 5,
"max": 5,
"detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
}
},
"summary": "High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 68m, avg 155m) for 64 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 Prigorodnoye\/Sakhalin LNG, a known STS activity area."
},
"sar": {
"status": "not_found",
"centroid": {
"lat": 46.6499189999999970268618199042975902557373046875,
"lon": 142.542867900000004510729922913014888763427734375
},
"time_window": {
"start_ts": "2026-10-23T07:40:37+00:00",
"end_ts": "2026-10-23T08:44:54+00:00"
},
"searched_at": "2026-10-23T13:30:01.431178+00:00",
"notes": "No Sentinel-1 scenes covering AOI and time window"
}
}- Minimum Distance: 68 meters
- Average Distance: 155 meters
- Duration: 1h 4m
- Period: 2026-10-23T07:40:37+00:00 to 2026-10-23T08:44:54+00:00
- Vessel A Avg Speed: 0.0 knots
- Vessel B Avg Speed: 0.1 knots
- Zone: Sakhalin South Approach
Confidence Analysis
High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 68m, avg 155m) for 64 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 Sakhalin South Approach, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 25/25 | Min distance 68m, avg 155m |
| Duration | 15/25 | Duration 64 minutes |
| Speed Stability | 20/20 | both nearly stationary; very stable speeds |
| Distance Consistency | 12/15 | Distance variance ±39m |
| Isolation | 5/10 | Isolation data not available |
| Context | 5/5 | In monitored zone: Sakhalin South Approach |
🛰️ 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": 273219140,
"imo": 9183817,
"name": "BUKHTA NAGAEVA",
"flag": "RUSSIA"
},
"vessel_b": {
"mmsi": 461000248,
"imo": 9333436,
"name": "SOLARIS",
"flag": "OMAN"
},
"min_distance_m": 68.400000000000005684341886080801486968994140625,
"avg_distance_m": 154.80000000000001136868377216160297393798828125,
"distance_consistency_m": 39.2999999999999971578290569595992565155029296875,
"duration_minutes": 64.2999999999999971578290569595992565155029296875,
"overlap_duration_s": 3857,
"speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
"speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
"speed_b_avg": 0.070000000000000006661338147750939242541790008544921875,
"speed_b_std": 0.08000000000000000166533453693773481063544750213623046875,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
"max_sog": 0.1000000000000000055511151231257827021181583404541015625
},
"vessel_b": {
"avg_sog": 0.070000000000000006661338147750939242541790008544921875,
"max_sog": 0.200000000000000011102230246251565404236316680908203125
}
},
"time_window": {
"start": "2026-10-23T07:40:37+00:00",
"end": "2026-10-23T08:44:54+00:00"
},
"points_count": {
"vessel_a": 7,
"vessel_b": 7
},
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"score": {
"value": 82,
"components": {
"distance_tightness": {
"score": 25,
"max": 25,
"detail": "Min distance 68m, avg 155m"
},
"duration": {
"score": 15,
"max": 25,
"detail": "Duration 64 minutes"
},
"speed_stability": {
"score": 20,
"max": 20,
"detail": "both nearly stationary; very stable speeds"
},
"distance_consistency": {
"score": 12,
"max": 15,
"detail": "Distance variance \u00b139m"
},
"isolation": {
"score": 5,
"max": 10,
"detail": "Isolation data not available"
},
"context": {
"score": 5,
"max": 5,
"detail": "In monitored zone: Sakhalin South Approach"
}
},
"summary": "High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 68m, avg 155m) for 64 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 Sakhalin South Approach, a known STS activity area."
},
"sar": {
"status": "not_found",
"centroid": {
"lat": 46.6499189999999970268618199042975902557373046875,
"lon": 142.542867900000004510729922913014888763427734375
},
"time_window": {
"start_ts": "2026-10-23T07:40:37+00:00",
"end_ts": "2026-10-23T08:44:54+00:00"
},
"searched_at": "2026-10-23T13:30:04.136586+00:00",
"notes": "No Sentinel-1 scenes covering AOI and time window"
}
}- Zone: Prigorodnoye/Sakhalin LNG
- Duration: 1h 11m
- Data Points: 8 AIS positions
- Period: 2026-10-23T07:40:37+00:00 to 2026-10-23T08:52:02+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"dwell_minutes": 71.400000000000005684341886080801486968994140625,
"points_in_zone": 8,
"first_point": {
"ts": "2026-10-23T07:40:37+00:00",
"lat": 46.649266699999998309067450463771820068359375,
"lon": 142.54298330000000305517460219562053680419921875
},
"last_point": {
"ts": "2026-10-23T08:52:02+00:00",
"lat": 46.649716699999999036663211882114410400390625,
"lon": 142.542633300000005647234502248466014862060546875
}
}- Zone: Sakhalin South Approach
- Duration: 1h 11m
- Data Points: 8 AIS positions
- Period: 2026-10-23T07:40:37+00:00 to 2026-10-23T08:52:02+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"dwell_minutes": 71.400000000000005684341886080801486968994140625,
"points_in_zone": 8,
"first_point": {
"ts": "2026-10-23T07:40:37+00:00",
"lat": 46.649266699999998309067450463771820068359375,
"lon": 142.54298330000000305517460219562053680419921875
},
"last_point": {
"ts": "2026-10-23T08:52:02+00:00",
"lat": 46.649716699999999036663211882114410400390625,
"lon": 142.542633300000005647234502248466014862060546875
}
}- Minimum Distance: 43 meters
- Average Distance: 141 meters
- Duration: 2h 10m
- Period: 2026-10-23T06:34:34+00:00 to 2026-10-23T08:44:54+00:00
- Vessel A Avg Speed: 0.0 knots
- Vessel B Avg Speed: 0.1 knots
- Zone: Prigorodnoye/Sakhalin LNG
Confidence Analysis
High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 141m) for 130 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). Moderate distance variation observed during the encounter. Event occurred in Prigorodnoye/Sakhalin LNG, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 25/25 | Min distance 43m, avg 141m |
| Duration | 25/25 | Duration 130 minutes |
| Speed Stability | 20/20 | both nearly stationary; very stable speeds |
| Distance Consistency | 8/15 | Distance variance ±50m |
| Isolation | 5/10 | Isolation data not available |
| Context | 5/5 | In monitored zone: Prigorodnoye/Sakhalin LNG |
🛰️ 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": 273219140,
"imo": 9183817,
"name": "BUKHTA NAGAEVA",
"flag": "RUSSIA"
},
"vessel_b": {
"mmsi": 461000248,
"imo": 9333436,
"name": "SOLARIS",
"flag": "OMAN"
},
"min_distance_m": 42.89999999999999857891452847979962825775146484375,
"avg_distance_m": 140.69999999999998863131622783839702606201171875,
"distance_consistency_m": 50.2000000000000028421709430404007434844970703125,
"duration_minutes": 130.30000000000001136868377216160297393798828125,
"overlap_duration_s": 7820,
"speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
"speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
"speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
"speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
"max_sog": 0.1000000000000000055511151231257827021181583404541015625
},
"vessel_b": {
"avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
"max_sog": 0.200000000000000011102230246251565404236316680908203125
}
},
"time_window": {
"start": "2026-10-23T06:34:34+00:00",
"end": "2026-10-23T08:44:54+00:00"
},
"points_count": {
"vessel_a": 9,
"vessel_b": 9
},
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"score": {
"value": 88,
"components": {
"distance_tightness": {
"score": 25,
"max": 25,
"detail": "Min distance 43m, avg 141m"
},
"duration": {
"score": 25,
"max": 25,
"detail": "Duration 130 minutes"
},
"speed_stability": {
"score": 20,
"max": 20,
"detail": "both nearly stationary; very stable speeds"
},
"distance_consistency": {
"score": 8,
"max": 15,
"detail": "Distance variance \u00b150m"
},
"isolation": {
"score": 5,
"max": 10,
"detail": "Isolation data not available"
},
"context": {
"score": 5,
"max": 5,
"detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
}
},
"summary": "High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 141m) for 130 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). Moderate distance variation observed during the encounter. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
},
"sar": {
"status": "not_found",
"centroid": {
"lat": 46.6496518000000008896677172742784023284912109375,
"lon": 142.542968500000000631189323030412197113037109375
},
"time_window": {
"start_ts": "2026-10-23T06:34:34+00:00",
"end_ts": "2026-10-23T08:44:54+00:00"
},
"searched_at": "2026-10-23T12:45:08.328258+00:00",
"notes": "No Sentinel-1 scenes covering AOI and time window"
}
}- Minimum Distance: 43 meters
- Average Distance: 141 meters
- Duration: 2h 10m
- Period: 2026-10-23T06:34:34+00:00 to 2026-10-23T08:44:54+00:00
- Vessel A Avg Speed: 0.0 knots
- Vessel B Avg Speed: 0.1 knots
- Zone: Sakhalin South Approach
Confidence Analysis
High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 141m) for 130 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). Moderate distance variation observed during the encounter. Event occurred in Sakhalin South Approach, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 25/25 | Min distance 43m, avg 141m |
| Duration | 25/25 | Duration 130 minutes |
| Speed Stability | 20/20 | both nearly stationary; very stable speeds |
| Distance Consistency | 8/15 | Distance variance ±50m |
| Isolation | 5/10 | Isolation data not available |
| Context | 5/5 | In monitored zone: Sakhalin South Approach |
🛰️ 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": 273219140,
"imo": 9183817,
"name": "BUKHTA NAGAEVA",
"flag": "RUSSIA"
},
"vessel_b": {
"mmsi": 461000248,
"imo": 9333436,
"name": "SOLARIS",
"flag": "OMAN"
},
"min_distance_m": 42.89999999999999857891452847979962825775146484375,
"avg_distance_m": 140.69999999999998863131622783839702606201171875,
"distance_consistency_m": 50.2000000000000028421709430404007434844970703125,
"duration_minutes": 130.30000000000001136868377216160297393798828125,
"overlap_duration_s": 7820,
"speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
"speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
"speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
"speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
"max_sog": 0.1000000000000000055511151231257827021181583404541015625
},
"vessel_b": {
"avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
"max_sog": 0.200000000000000011102230246251565404236316680908203125
}
},
"time_window": {
"start": "2026-10-23T06:34:34+00:00",
"end": "2026-10-23T08:44:54+00:00"
},
"points_count": {
"vessel_a": 9,
"vessel_b": 9
},
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"score": {
"value": 88,
"components": {
"distance_tightness": {
"score": 25,
"max": 25,
"detail": "Min distance 43m, avg 141m"
},
"duration": {
"score": 25,
"max": 25,
"detail": "Duration 130 minutes"
},
"speed_stability": {
"score": 20,
"max": 20,
"detail": "both nearly stationary; very stable speeds"
},
"distance_consistency": {
"score": 8,
"max": 15,
"detail": "Distance variance \u00b150m"
},
"isolation": {
"score": 5,
"max": 10,
"detail": "Isolation data not available"
},
"context": {
"score": 5,
"max": 5,
"detail": "In monitored zone: Sakhalin South Approach"
}
},
"summary": "High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 141m) for 130 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). Moderate distance variation observed during the encounter. Event occurred in Sakhalin South Approach, a known STS activity area."
},
"sar": {
"status": "not_found",
"centroid": {
"lat": 46.6496518000000008896677172742784023284912109375,
"lon": 142.542968500000000631189323030412197113037109375
},
"time_window": {
"start_ts": "2026-10-23T06:34:34+00:00",
"end_ts": "2026-10-23T08:44:54+00:00"
},
"searched_at": "2026-10-23T12:45:10.712340+00:00",
"notes": "No Sentinel-1 scenes covering AOI and time window"
}
}- Zone: Prigorodnoye/Sakhalin LNG
- Duration: 2h 17m
- Data Points: 10 AIS positions
- Period: 2026-10-23T06:34:34+00:00 to 2026-10-23T08:52:02+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"dwell_minutes": 137.5,
"points_in_zone": 10,
"first_point": {
"ts": "2026-10-23T06:34:34+00:00",
"lat": 46.6488666999999992412995197810232639312744140625,
"lon": 142.543100000000009686118573881685733795166015625
},
"last_point": {
"ts": "2026-10-23T08:52:02+00:00",
"lat": 46.649716699999999036663211882114410400390625,
"lon": 142.542633300000005647234502248466014862060546875
}
}- Zone: Sakhalin South Approach
- Duration: 2h 17m
- Data Points: 10 AIS positions
- Period: 2026-10-23T06:34:34+00:00 to 2026-10-23T08:52:02+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"dwell_minutes": 137.5,
"points_in_zone": 10,
"first_point": {
"ts": "2026-10-23T06:34:34+00:00",
"lat": 46.6488666999999992412995197810232639312744140625,
"lon": 142.543100000000009686118573881685733795166015625
},
"last_point": {
"ts": "2026-10-23T08:52:02+00:00",
"lat": 46.649716699999999036663211882114410400390625,
"lon": 142.542633300000005647234502248466014862060546875
}
}- Duration: 2h 17m
- Radius: 55 meters
- Data Points: 10 AIS positions
- Centroid: 46.6493, 142.5429
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
"radius_m": 55,
"duration_minutes": 137.5,
"points": 10,
"centroid": {
"lat": 46.6493416800000062494291341863572597503662109375,
"lon": 142.54289833000001408436219207942485809326171875
},
"bbox": {
"min_lat": 46.6488666999999992412995197810232639312744140625,
"min_lon": 142.542633300000005647234502248466014862060546875,
"max_lat": 46.649716699999999036663211882114410400390625,
"max_lon": 142.543100000000009686118573881685733795166015625
},
"zone_id": "russia_prigorodnoye"
}- Duration: 2h 17m
- Radius: 55 meters
- Data Points: 10 AIS positions
- Centroid: 46.6493, 142.5429
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
"radius_m": 55,
"duration_minutes": 137.5,
"points": 10,
"centroid": {
"lat": 46.6493416800000062494291341863572597503662109375,
"lon": 142.54289833000001408436219207942485809326171875
},
"bbox": {
"min_lat": 46.6488666999999992412995197810232639312744140625,
"min_lon": 142.542633300000005647234502248466014862060546875,
"max_lat": 46.649716699999999036663211882114410400390625,
"max_lon": 142.543100000000009686118573881685733795166015625
},
"zone_id": "russia_sakhalin_south"
}- Zone: Prigorodnoye/Sakhalin LNG
- Duration: 2h 56m
- Data Points: 11 AIS positions
- Period: 2026-10-23T05:55:19+00:00 to 2026-10-23T08:52:02+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"dwell_minutes": 176.69999999999998863131622783839702606201171875,
"points_in_zone": 11,
"first_point": {
"ts": "2026-10-23T05:55:19+00:00",
"lat": 46.6488666999999992412995197810232639312744140625,
"lon": 142.543116700000012997406884096562862396240234375
},
"last_point": {
"ts": "2026-10-23T08:52:02+00:00",
"lat": 46.649716699999999036663211882114410400390625,
"lon": 142.542633300000005647234502248466014862060546875
}
}- Zone: Sakhalin South Approach
- Duration: 2h 56m
- Data Points: 11 AIS positions
- Period: 2026-10-23T05:55:19+00:00 to 2026-10-23T08:52:02+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"dwell_minutes": 176.69999999999998863131622783839702606201171875,
"points_in_zone": 11,
"first_point": {
"ts": "2026-10-23T05:55:19+00:00",
"lat": 46.6488666999999992412995197810232639312744140625,
"lon": 142.543116700000012997406884096562862396240234375
},
"last_point": {
"ts": "2026-10-23T08:52:02+00:00",
"lat": 46.649716699999999036663211882114410400390625,
"lon": 142.542633300000005647234502248466014862060546875
}
}- Duration: 2h 56m
- Radius: 51 meters
- Data Points: 11 AIS positions
- Centroid: 46.6493, 142.5429
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
"radius_m": 51.2999999999999971578290569595992565155029296875,
"duration_minutes": 176.69999999999998863131622783839702606201171875,
"points": 11,
"centroid": {
"lat": 46.64929850000000755017026676796376705169677734375,
"lon": 142.542918181818180300979292951524257659912109375
},
"bbox": {
"min_lat": 46.6488666999999992412995197810232639312744140625,
"min_lon": 142.542633300000005647234502248466014862060546875,
"max_lat": 46.649716699999999036663211882114410400390625,
"max_lon": 142.543116700000012997406884096562862396240234375
},
"zone_id": "russia_prigorodnoye"
}- Duration: 2h 56m
- Radius: 51 meters
- Data Points: 11 AIS positions
- Centroid: 46.6493, 142.5429
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
"radius_m": 51.2999999999999971578290569595992565155029296875,
"duration_minutes": 176.69999999999998863131622783839702606201171875,
"points": 11,
"centroid": {
"lat": 46.64929850000000755017026676796376705169677734375,
"lon": 142.542918181818180300979292951524257659912109375
},
"bbox": {
"min_lat": 46.6488666999999992412995197810232639312744140625,
"min_lon": 142.542633300000005647234502248466014862060546875,
"max_lat": 46.649716699999999036663211882114410400390625,
"max_lon": 142.543116700000012997406884096562862396240234375
},
"zone_id": "russia_sakhalin_south"
}- Minimum Distance: 43 meters
- Average Distance: 147 meters
- Duration: 4h 18m
- Period: 2026-10-23T04:25:59+00:00 to 2026-10-23T08:44:54+00:00
- Vessel A Avg Speed: 0.1 knots
- Vessel B Avg Speed: 0.1 knots
- Zone: Prigorodnoye/Sakhalin LNG
Confidence Analysis
High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 147m) for 259 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye/Sakhalin LNG, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 25/25 | Min distance 43m, avg 147m |
| Duration | 25/25 | Duration 259 minutes |
| Speed Stability | 20/20 | both nearly stationary; very stable speeds |
| Distance Consistency | 12/15 | Distance variance ±50m |
| Isolation | 5/10 | Isolation data not available |
| Context | 5/5 | In monitored zone: Prigorodnoye/Sakhalin LNG |
🛰️ 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": 273219140,
"imo": 9183817,
"name": "BUKHTA NAGAEVA",
"flag": "RUSSIA"
},
"vessel_b": {
"mmsi": 461000248,
"imo": 9333436,
"name": "SOLARIS",
"flag": "OMAN"
},
"min_distance_m": 42.89999999999999857891452847979962825775146484375,
"avg_distance_m": 147.30000000000001136868377216160297393798828125,
"distance_consistency_m": 49.89999999999999857891452847979962825775146484375,
"duration_minutes": 258.8999999999999772626324556767940521240234375,
"overlap_duration_s": 15535,
"speed_a_avg": 0.070000000000000006661338147750939242541790008544921875,
"speed_a_std": 0.0899999999999999966693309261245303787291049957275390625,
"speed_b_avg": 0.13000000000000000444089209850062616169452667236328125,
"speed_b_std": 0.11000000000000000055511151231257827021181583404541015625,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.070000000000000006661338147750939242541790008544921875,
"max_sog": 0.299999999999999988897769753748434595763683319091796875
},
"vessel_b": {
"avg_sog": 0.13000000000000000444089209850062616169452667236328125,
"max_sog": 0.40000000000000002220446049250313080847263336181640625
}
},
"time_window": {
"start": "2026-10-23T04:25:59+00:00",
"end": "2026-10-23T08:44:54+00:00"
},
"points_count": {
"vessel_a": 12,
"vessel_b": 12
},
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"score": {
"value": 92,
"components": {
"distance_tightness": {
"score": 25,
"max": 25,
"detail": "Min distance 43m, avg 147m"
},
"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": 12,
"max": 15,
"detail": "Distance variance \u00b150m"
},
"isolation": {
"score": 5,
"max": 10,
"detail": "Isolation data not available"
},
"context": {
"score": 5,
"max": 5,
"detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
}
},
"summary": "High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 147m) for 259 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
},
"sar": {
"status": "not_found",
"centroid": {
"lat": 46.64946809999999999263309291563928127288818359375,
"lon": 142.542810400000007575727067887783050537109375
},
"time_window": {
"start_ts": "2026-10-23T04:25:59+00:00",
"end_ts": "2026-10-23T08:44:54+00:00"
},
"searched_at": "2026-10-23T10:45:07.932799+00:00",
"notes": "No Sentinel-1 scenes covering AOI and time window"
}
}- Minimum Distance: 43 meters
- Average Distance: 147 meters
- Duration: 4h 18m
- Period: 2026-10-23T04:25:59+00:00 to 2026-10-23T08:44:54+00:00
- Vessel A Avg Speed: 0.1 knots
- Vessel B Avg Speed: 0.1 knots
- Zone: Sakhalin South Approach
Confidence Analysis
High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 147m) for 259 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 25/25 | Min distance 43m, avg 147m |
| Duration | 25/25 | Duration 259 minutes |
| Speed Stability | 20/20 | both nearly stationary; very stable speeds |
| Distance Consistency | 12/15 | Distance variance ±50m |
| Isolation | 5/10 | Isolation data not available |
| Context | 5/5 | In monitored zone: Sakhalin South Approach |
🛰️ 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": 273219140,
"imo": 9183817,
"name": "BUKHTA NAGAEVA",
"flag": "RUSSIA"
},
"vessel_b": {
"mmsi": 461000248,
"imo": 9333436,
"name": "SOLARIS",
"flag": "OMAN"
},
"min_distance_m": 42.89999999999999857891452847979962825775146484375,
"avg_distance_m": 147.30000000000001136868377216160297393798828125,
"distance_consistency_m": 49.89999999999999857891452847979962825775146484375,
"duration_minutes": 258.8999999999999772626324556767940521240234375,
"overlap_duration_s": 15535,
"speed_a_avg": 0.070000000000000006661338147750939242541790008544921875,
"speed_a_std": 0.0899999999999999966693309261245303787291049957275390625,
"speed_b_avg": 0.13000000000000000444089209850062616169452667236328125,
"speed_b_std": 0.11000000000000000055511151231257827021181583404541015625,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.070000000000000006661338147750939242541790008544921875,
"max_sog": 0.299999999999999988897769753748434595763683319091796875
},
"vessel_b": {
"avg_sog": 0.13000000000000000444089209850062616169452667236328125,
"max_sog": 0.40000000000000002220446049250313080847263336181640625
}
},
"time_window": {
"start": "2026-10-23T04:25:59+00:00",
"end": "2026-10-23T08:44:54+00:00"
},
"points_count": {
"vessel_a": 12,
"vessel_b": 12
},
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"score": {
"value": 92,
"components": {
"distance_tightness": {
"score": 25,
"max": 25,
"detail": "Min distance 43m, avg 147m"
},
"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": 12,
"max": 15,
"detail": "Distance variance \u00b150m"
},
"isolation": {
"score": 5,
"max": 10,
"detail": "Isolation data not available"
},
"context": {
"score": 5,
"max": 5,
"detail": "In monitored zone: Sakhalin South Approach"
}
},
"summary": "High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 147m) for 259 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area."
},
"sar": {
"status": "not_found",
"centroid": {
"lat": 46.64946809999999999263309291563928127288818359375,
"lon": 142.542810400000007575727067887783050537109375
},
"time_window": {
"start_ts": "2026-10-23T04:25:59+00:00",
"end_ts": "2026-10-23T08:44:54+00:00"
},
"searched_at": "2026-10-23T10:45:10.431778+00:00",
"notes": "No Sentinel-1 scenes covering AOI and time window"
}
}- Zone: Prigorodnoye/Sakhalin LNG
- Duration: 4h 26m
- Data Points: 13 AIS positions
- Period: 2026-10-23T04:25:59+00:00 to 2026-10-23T08:52:02+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"dwell_minutes": 266.1000000000000227373675443232059478759765625,
"points_in_zone": 13,
"first_point": {
"ts": "2026-10-23T04:25:59+00:00",
"lat": 46.6484166999999985137037583626806735992431640625,
"lon": 142.543116700000012997406884096562862396240234375
},
"last_point": {
"ts": "2026-10-23T08:52:02+00:00",
"lat": 46.649716699999999036663211882114410400390625,
"lon": 142.542633300000005647234502248466014862060546875
}
}- Zone: Sakhalin South Approach
- Duration: 4h 26m
- Data Points: 13 AIS positions
- Period: 2026-10-23T04:25:59+00:00 to 2026-10-23T08:52:02+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"dwell_minutes": 266.1000000000000227373675443232059478759765625,
"points_in_zone": 13,
"first_point": {
"ts": "2026-10-23T04:25:59+00:00",
"lat": 46.6484166999999985137037583626806735992431640625,
"lon": 142.543116700000012997406884096562862396240234375
},
"last_point": {
"ts": "2026-10-23T08:52:02+00:00",
"lat": 46.649716699999999036663211882114410400390625,
"lon": 142.542633300000005647234502248466014862060546875
}
}- Duration: 4h 26m
- Radius: 87 meters
- Data Points: 13 AIS positions
- Centroid: 46.6492, 142.5429
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
"radius_m": 86.900000000000005684341886080801486968994140625,
"duration_minutes": 266.1000000000000227373675443232059478759765625,
"points": 13,
"centroid": {
"lat": 46.64918976153845875387560226954519748687744140625,
"lon": 142.5429461538461737291072495281696319580078125
},
"bbox": {
"min_lat": 46.6484166999999985137037583626806735992431640625,
"min_lon": 142.542633300000005647234502248466014862060546875,
"max_lat": 46.649716699999999036663211882114410400390625,
"max_lon": 142.543116700000012997406884096562862396240234375
},
"zone_id": "russia_prigorodnoye"
}- Duration: 4h 26m
- Radius: 87 meters
- Data Points: 13 AIS positions
- Centroid: 46.6492, 142.5429
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
"radius_m": 86.900000000000005684341886080801486968994140625,
"duration_minutes": 266.1000000000000227373675443232059478759765625,
"points": 13,
"centroid": {
"lat": 46.64918976153845875387560226954519748687744140625,
"lon": 142.5429461538461737291072495281696319580078125
},
"bbox": {
"min_lat": 46.6484166999999985137037583626806735992431640625,
"min_lon": 142.542633300000005647234502248466014862060546875,
"max_lat": 46.649716699999999036663211882114410400390625,
"max_lon": 142.543116700000012997406884096562862396240234375
},
"zone_id": "russia_sakhalin_south"
}- Minimum Distance: 43 meters
- Average Distance: 159 meters
- Duration: 5h 40m
- Period: 2026-10-23T03:04:49+00:00 to 2026-10-23T08:44:54+00:00
- Vessel A Avg Speed: 0.1 knots
- Vessel B Avg Speed: 0.2 knots
- Zone: Prigorodnoye/Sakhalin LNG
Confidence Analysis
High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 159m) for 340 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). Moderate distance variation observed during the encounter. Event occurred in Prigorodnoye/Sakhalin LNG, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 25/25 | Min distance 43m, avg 159m |
| Duration | 25/25 | Duration 340 minutes |
| Speed Stability | 20/20 | both nearly stationary; very stable speeds |
| Distance Consistency | 8/15 | Distance variance ±72m |
| Isolation | 5/10 | Isolation data not available |
| Context | 5/5 | In monitored zone: Prigorodnoye/Sakhalin LNG |
🛰️ 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": 273219140,
"imo": 9183817,
"name": "BUKHTA NAGAEVA",
"flag": "RUSSIA"
},
"vessel_b": {
"mmsi": 461000248,
"imo": 9333436,
"name": "SOLARIS",
"flag": "OMAN"
},
"min_distance_m": 42.89999999999999857891452847979962825775146484375,
"avg_distance_m": 159.30000000000001136868377216160297393798828125,
"distance_consistency_m": 71.7999999999999971578290569595992565155029296875,
"duration_minutes": 340.1000000000000227373675443232059478759765625,
"overlap_duration_s": 20405,
"speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
"speed_a_std": 0.08000000000000000166533453693773481063544750213623046875,
"speed_b_avg": 0.1499999999999999944488848768742172978818416595458984375,
"speed_b_std": 0.11999999999999999555910790149937383830547332763671875,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
"max_sog": 0.299999999999999988897769753748434595763683319091796875
},
"vessel_b": {
"avg_sog": 0.1499999999999999944488848768742172978818416595458984375,
"max_sog": 0.40000000000000002220446049250313080847263336181640625
}
},
"time_window": {
"start": "2026-10-23T03:04:49+00:00",
"end": "2026-10-23T08:44:54+00:00"
},
"points_count": {
"vessel_a": 15,
"vessel_b": 15
},
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"score": {
"value": 88,
"components": {
"distance_tightness": {
"score": 25,
"max": 25,
"detail": "Min distance 43m, avg 159m"
},
"duration": {
"score": 25,
"max": 25,
"detail": "Duration 340 minutes"
},
"speed_stability": {
"score": 20,
"max": 20,
"detail": "both nearly stationary; very stable speeds"
},
"distance_consistency": {
"score": 8,
"max": 15,
"detail": "Distance variance \u00b172m"
},
"isolation": {
"score": 5,
"max": 10,
"detail": "Isolation data not available"
},
"context": {
"score": 5,
"max": 5,
"detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
}
},
"summary": "High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 159m) for 340 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). Moderate distance variation observed during the encounter. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
},
"sar": {
"status": "not_found",
"centroid": {
"lat": 46.649187200000000075306161306798458099365234375,
"lon": 142.542925599999989572097547352313995361328125
},
"time_window": {
"start_ts": "2026-10-23T03:04:49+00:00",
"end_ts": "2026-10-23T08:44:54+00:00"
},
"searched_at": "2026-10-23T09:45:09.775084+00:00",
"notes": "No Sentinel-1 scenes covering AOI and time window"
}
}- Minimum Distance: 43 meters
- Average Distance: 159 meters
- Duration: 5h 40m
- Period: 2026-10-23T03:04:49+00:00 to 2026-10-23T08:44:54+00:00
- Vessel A Avg Speed: 0.1 knots
- Vessel B Avg Speed: 0.2 knots
- Zone: Sakhalin South Approach
Confidence Analysis
High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 159m) for 340 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). Moderate distance variation observed during the encounter. Event occurred in Sakhalin South Approach, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 25/25 | Min distance 43m, avg 159m |
| Duration | 25/25 | Duration 340 minutes |
| Speed Stability | 20/20 | both nearly stationary; very stable speeds |
| Distance Consistency | 8/15 | Distance variance ±72m |
| Isolation | 5/10 | Isolation data not available |
| Context | 5/5 | In monitored zone: Sakhalin South Approach |
🛰️ 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": 273219140,
"imo": 9183817,
"name": "BUKHTA NAGAEVA",
"flag": "RUSSIA"
},
"vessel_b": {
"mmsi": 461000248,
"imo": 9333436,
"name": "SOLARIS",
"flag": "OMAN"
},
"min_distance_m": 42.89999999999999857891452847979962825775146484375,
"avg_distance_m": 159.30000000000001136868377216160297393798828125,
"distance_consistency_m": 71.7999999999999971578290569595992565155029296875,
"duration_minutes": 340.1000000000000227373675443232059478759765625,
"overlap_duration_s": 20405,
"speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
"speed_a_std": 0.08000000000000000166533453693773481063544750213623046875,
"speed_b_avg": 0.1499999999999999944488848768742172978818416595458984375,
"speed_b_std": 0.11999999999999999555910790149937383830547332763671875,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
"max_sog": 0.299999999999999988897769753748434595763683319091796875
},
"vessel_b": {
"avg_sog": 0.1499999999999999944488848768742172978818416595458984375,
"max_sog": 0.40000000000000002220446049250313080847263336181640625
}
},
"time_window": {
"start": "2026-10-23T03:04:49+00:00",
"end": "2026-10-23T08:44:54+00:00"
},
"points_count": {
"vessel_a": 15,
"vessel_b": 15
},
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"score": {
"value": 88,
"components": {
"distance_tightness": {
"score": 25,
"max": 25,
"detail": "Min distance 43m, avg 159m"
},
"duration": {
"score": 25,
"max": 25,
"detail": "Duration 340 minutes"
},
"speed_stability": {
"score": 20,
"max": 20,
"detail": "both nearly stationary; very stable speeds"
},
"distance_consistency": {
"score": 8,
"max": 15,
"detail": "Distance variance \u00b172m"
},
"isolation": {
"score": 5,
"max": 10,
"detail": "Isolation data not available"
},
"context": {
"score": 5,
"max": 5,
"detail": "In monitored zone: Sakhalin South Approach"
}
},
"summary": "High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 159m) for 340 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). Moderate distance variation observed during the encounter. Event occurred in Sakhalin South Approach, a known STS activity area."
},
"sar": {
"status": "not_found",
"centroid": {
"lat": 46.649187200000000075306161306798458099365234375,
"lon": 142.542925599999989572097547352313995361328125
},
"time_window": {
"start_ts": "2026-10-23T03:04:49+00:00",
"end_ts": "2026-10-23T08:44:54+00:00"
},
"searched_at": "2026-10-23T09:45:12.668636+00:00",
"notes": "No Sentinel-1 scenes covering AOI and time window"
}
}- Zone: Sakhalin South Approach
- Duration: 5h 51m
- Data Points: 17 AIS positions
- Period: 2026-10-23T03:00:20+00:00 to 2026-10-23T08:52:02+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"dwell_minutes": 351.69999999999998863131622783839702606201171875,
"points_in_zone": 17,
"first_point": {
"ts": "2026-10-23T03:00:20+00:00",
"lat": 46.648366699999996853875927627086639404296875,
"lon": 142.542966699999993807068676687777042388916015625
},
"last_point": {
"ts": "2026-10-23T08:52:02+00:00",
"lat": 46.649716699999999036663211882114410400390625,
"lon": 142.542633300000005647234502248466014862060546875
}
}- Zone: Prigorodnoye/Sakhalin LNG
- Duration: 5h 51m
- Data Points: 17 AIS positions
- Period: 2026-10-23T03:00:20+00:00 to 2026-10-23T08:52:02+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"dwell_minutes": 351.69999999999998863131622783839702606201171875,
"points_in_zone": 17,
"first_point": {
"ts": "2026-10-23T03:00:20+00:00",
"lat": 46.648366699999996853875927627086639404296875,
"lon": 142.542966699999993807068676687777042388916015625
},
"last_point": {
"ts": "2026-10-23T08:52:02+00:00",
"lat": 46.649716699999999036663211882114410400390625,
"lon": 142.542633300000005647234502248466014862060546875
}
}- Duration: 5h 51m
- Radius: 86 meters
- Data Points: 17 AIS positions
- Centroid: 46.6490, 142.5430
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
"radius_m": 86,
"duration_minutes": 351.69999999999998863131622783839702606201171875,
"points": 17,
"centroid": {
"lat": 46.6490019764705863281051279045641422271728515625,
"lon": 142.542968629411774372783838771283626556396484375
},
"bbox": {
"min_lat": 46.6482333000000011224983609281480312347412109375,
"min_lon": 142.542633300000005647234502248466014862060546875,
"max_lat": 46.649716699999999036663211882114410400390625,
"max_lon": 142.543116700000012997406884096562862396240234375
},
"zone_id": "russia_prigorodnoye"
}- Duration: 5h 51m
- Radius: 86 meters
- Data Points: 17 AIS positions
- Centroid: 46.6490, 142.5430
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
"radius_m": 86,
"duration_minutes": 351.69999999999998863131622783839702606201171875,
"points": 17,
"centroid": {
"lat": 46.6490019764705863281051279045641422271728515625,
"lon": 142.542968629411774372783838771283626556396484375
},
"bbox": {
"min_lat": 46.6482333000000011224983609281480312347412109375,
"min_lon": 142.542633300000005647234502248466014862060546875,
"max_lat": 46.649716699999999036663211882114410400390625,
"max_lon": 142.543116700000012997406884096562862396240234375
},
"zone_id": "russia_sakhalin_south"
}- Minimum Distance: 43 meters
- Average Distance: 167 meters
- Duration: 6h 25m
- Period: 2026-10-23T02:18:59+00:00 to 2026-10-23T08:44:54+00:00
- Vessel A Avg Speed: 0.1 knots
- Vessel B Avg Speed: 0.2 knots
- Zone: Prigorodnoye/Sakhalin LNG
Confidence Analysis
High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 167m) for 386 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). Moderate distance variation observed during the encounter. Event occurred in Prigorodnoye/Sakhalin LNG, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 25/25 | Min distance 43m, avg 167m |
| Duration | 25/25 | Duration 386 minutes |
| Speed Stability | 20/20 | both nearly stationary; very stable speeds |
| Distance Consistency | 8/15 | Distance variance ±82m |
| Isolation | 5/10 | Isolation data not available |
| Context | 5/5 | In monitored zone: Prigorodnoye/Sakhalin LNG |
Show Raw Evidence JSON
{
"vessel_a": {
"mmsi": 273219140,
"imo": 9183817,
"name": "BUKHTA NAGAEVA",
"flag": "RUSSIA"
},
"vessel_b": {
"mmsi": 461000248,
"imo": 9333436,
"name": "SOLARIS",
"flag": "OMAN"
},
"min_distance_m": 42.89999999999999857891452847979962825775146484375,
"avg_distance_m": 167.099999999999994315658113919198513031005859375,
"distance_consistency_m": 82.2999999999999971578290569595992565155029296875,
"duration_minutes": 385.8999999999999772626324556767940521240234375,
"overlap_duration_s": 23155,
"speed_a_avg": 0.11999999999999999555910790149937383830547332763671875,
"speed_a_std": 0.1700000000000000122124532708767219446599483489990234375,
"speed_b_avg": 0.179999999999999993338661852249060757458209991455078125,
"speed_b_std": 0.1000000000000000055511151231257827021181583404541015625,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.11999999999999999555910790149937383830547332763671875,
"max_sog": 0.59999999999999997779553950749686919152736663818359375
},
"vessel_b": {
"avg_sog": 0.179999999999999993338661852249060757458209991455078125,
"max_sog": 0.40000000000000002220446049250313080847263336181640625
}
},
"time_window": {
"start": "2026-10-23T02:18:59+00:00",
"end": "2026-10-23T08:44:54+00:00"
},
"points_count": {
"vessel_a": 25,
"vessel_b": 25
},
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"score": {
"value": 88,
"components": {
"distance_tightness": {
"score": 25,
"max": 25,
"detail": "Min distance 43m, avg 167m"
},
"duration": {
"score": 25,
"max": 25,
"detail": "Duration 386 minutes"
},
"speed_stability": {
"score": 20,
"max": 20,
"detail": "both nearly stationary; very stable speeds"
},
"distance_consistency": {
"score": 8,
"max": 15,
"detail": "Distance variance \u00b182m"
},
"isolation": {
"score": 5,
"max": 10,
"detail": "Isolation data not available"
},
"context": {
"score": 5,
"max": 5,
"detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
}
},
"summary": "High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 167m) for 386 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). Moderate distance variation observed during the encounter. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
}
}- Minimum Distance: 43 meters
- Average Distance: 167 meters
- Duration: 6h 25m
- Period: 2026-10-23T02:18:59+00:00 to 2026-10-23T08:44:54+00:00
- Vessel A Avg Speed: 0.1 knots
- Vessel B Avg Speed: 0.2 knots
- Zone: Sakhalin South Approach
Confidence Analysis
High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 167m) for 386 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). Moderate distance variation observed during the encounter. Event occurred in Sakhalin South Approach, a known STS activity area.
View scoring breakdown
| Factor | Score | Detail |
|---|---|---|
| Distance Tightness | 25/25 | Min distance 43m, avg 167m |
| Duration | 25/25 | Duration 386 minutes |
| Speed Stability | 20/20 | both nearly stationary; very stable speeds |
| Distance Consistency | 8/15 | Distance variance ±82m |
| Isolation | 5/10 | Isolation data not available |
| Context | 5/5 | In monitored zone: Sakhalin South Approach |
Show Raw Evidence JSON
{
"vessel_a": {
"mmsi": 273219140,
"imo": 9183817,
"name": "BUKHTA NAGAEVA",
"flag": "RUSSIA"
},
"vessel_b": {
"mmsi": 461000248,
"imo": 9333436,
"name": "SOLARIS",
"flag": "OMAN"
},
"min_distance_m": 42.89999999999999857891452847979962825775146484375,
"avg_distance_m": 167.099999999999994315658113919198513031005859375,
"distance_consistency_m": 82.2999999999999971578290569595992565155029296875,
"duration_minutes": 385.8999999999999772626324556767940521240234375,
"overlap_duration_s": 23155,
"speed_a_avg": 0.11999999999999999555910790149937383830547332763671875,
"speed_a_std": 0.1700000000000000122124532708767219446599483489990234375,
"speed_b_avg": 0.179999999999999993338661852249060757458209991455078125,
"speed_b_std": 0.1000000000000000055511151231257827021181583404541015625,
"speed_summary": {
"vessel_a": {
"avg_sog": 0.11999999999999999555910790149937383830547332763671875,
"max_sog": 0.59999999999999997779553950749686919152736663818359375
},
"vessel_b": {
"avg_sog": 0.179999999999999993338661852249060757458209991455078125,
"max_sog": 0.40000000000000002220446049250313080847263336181640625
}
},
"time_window": {
"start": "2026-10-23T02:18:59+00:00",
"end": "2026-10-23T08:44:54+00:00"
},
"points_count": {
"vessel_a": 25,
"vessel_b": 25
},
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"score": {
"value": 88,
"components": {
"distance_tightness": {
"score": 25,
"max": 25,
"detail": "Min distance 43m, avg 167m"
},
"duration": {
"score": 25,
"max": 25,
"detail": "Duration 386 minutes"
},
"speed_stability": {
"score": 20,
"max": 20,
"detail": "both nearly stationary; very stable speeds"
},
"distance_consistency": {
"score": 8,
"max": 15,
"detail": "Distance variance \u00b182m"
},
"isolation": {
"score": 5,
"max": 10,
"detail": "Isolation data not available"
},
"context": {
"score": 5,
"max": 5,
"detail": "In monitored zone: Sakhalin South Approach"
}
},
"summary": "High-confidence STS candidate. Two tankers (BUKHTA NAGAEVA and SOLARIS) maintained close proximity (min 43m, avg 167m) for 386 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). Moderate distance variation observed during the encounter. Event occurred in Sakhalin South Approach, a known STS activity area."
}
}- Zone: Prigorodnoye/Sakhalin LNG
- Duration: 6h 31m
- Data Points: 25 AIS positions
- Period: 2026-10-23T02:21:00+00:00 to 2026-10-23T08:52:02+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"dwell_minutes": 391,
"points_in_zone": 25,
"first_point": {
"ts": "2026-10-23T02:21:00+00:00",
"lat": 46.64821669999999897981979302130639553070068359375,
"lon": 142.54508329999998750281520187854766845703125
},
"last_point": {
"ts": "2026-10-23T08:52:02+00:00",
"lat": 46.649716699999999036663211882114410400390625,
"lon": 142.542633300000005647234502248466014862060546875
}
}- Zone: Sakhalin South Approach
- Duration: 6h 31m
- Data Points: 25 AIS positions
- Period: 2026-10-23T02:21:00+00:00 to 2026-10-23T08:52:02+00:00
Show Raw Evidence JSON
{
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}- Duration: 6h 31m
- Radius: 164 meters
- Data Points: 25 AIS positions
- Centroid: 46.6488, 142.5431
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
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}- Duration: 6h 31m
- Radius: 164 meters
- Data Points: 25 AIS positions
- Centroid: 46.6488, 142.5431
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
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- Duration: 6h 37m
- Data Points: 28 AIS positions
- Period: 2026-10-23T01:51:23+00:00 to 2026-10-23T08:28:35+00:00
Show Raw Evidence JSON
{
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- Duration: 6h 37m
- Data Points: 28 AIS positions
- Period: 2026-10-23T01:51:23+00:00 to 2026-10-23T08:28:35+00:00
Show Raw Evidence JSON
{
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}- Duration: 6h 37m
- Radius: 679 meters
- Data Points: 28 AIS positions
- Centroid: 46.6486, 142.5449
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
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}- Duration: 6h 37m
- Radius: 679 meters
- Data Points: 28 AIS positions
- Centroid: 46.6486, 142.5449
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
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- Duration: 6h 16m
- Data Points: 35 AIS positions
- Period: 2026-10-23T00:27:08+00:00 to 2026-10-23T06:43:58+00:00
Show Raw Evidence JSON
{
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- Duration: 6h 16m
- Data Points: 35 AIS positions
- Period: 2026-10-23T00:27:08+00:00 to 2026-10-23T06:43:58+00:00
Show Raw Evidence JSON
{
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- Radius: 850 meters
- Data Points: 35 AIS positions
- Centroid: 46.6498, 142.5486
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
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}- Duration: 6h 16m
- Radius: 850 meters
- Data Points: 35 AIS positions
- Centroid: 46.6498, 142.5486
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
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}- Zone: Sakhalin South Approach
- Duration: 6h 32m
- Data Points: 34 AIS positions
- Period: 2026-10-22T23:22:55+00:00 to 2026-10-23T05:55:19+00:00
Show Raw Evidence JSON
{
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- Duration: 6h 32m
- Data Points: 34 AIS positions
- Period: 2026-10-22T23:22:55+00:00 to 2026-10-23T05:55:19+00:00
Show Raw Evidence JSON
{
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}- Duration: 6h 32m
- Radius: 818 meters
- Data Points: 34 AIS positions
- Centroid: 46.6500, 142.5491
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
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}- Duration: 6h 32m
- Radius: 818 meters
- Data Points: 34 AIS positions
- Centroid: 46.6500, 142.5491
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
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- Duration: 6h 39m
- Data Points: 39 AIS positions
- Period: 2026-10-22T22:20:29+00:00 to 2026-10-23T04:59:44+00:00
Show Raw Evidence JSON
{
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- Duration: 6h 39m
- Data Points: 39 AIS positions
- Period: 2026-10-22T22:20:29+00:00 to 2026-10-23T04:59:44+00:00
Show Raw Evidence JSON
{
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}- Duration: 6h 39m
- Radius: 685 meters
- Data Points: 39 AIS positions
- Centroid: 46.6508, 142.5505
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
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}- Duration: 6h 39m
- Radius: 685 meters
- Data Points: 39 AIS positions
- Centroid: 46.6508, 142.5505
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
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- Duration: 6h 30m
- Data Points: 41 AIS positions
- Period: 2026-10-22T21:55:45+00:00 to 2026-10-23T04:25:59+00:00
Show Raw Evidence JSON
{
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- Duration: 6h 30m
- Data Points: 41 AIS positions
- Period: 2026-10-22T21:55:45+00:00 to 2026-10-23T04:25:59+00:00
Show Raw Evidence JSON
{
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}- Duration: 6h 30m
- Radius: 707 meters
- Data Points: 41 AIS positions
- Centroid: 46.6512, 142.5511
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
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}- Duration: 6h 30m
- Radius: 707 meters
- Data Points: 41 AIS positions
- Centroid: 46.6512, 142.5511
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
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- Duration: 6h 31m
- Data Points: 44 AIS positions
- Period: 2026-10-22T20:35:28+00:00 to 2026-10-23T03:07:11+00:00
Show Raw Evidence JSON
{
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- Duration: 6h 31m
- Data Points: 44 AIS positions
- Period: 2026-10-22T20:35:28+00:00 to 2026-10-23T03:07:11+00:00
Show Raw Evidence JSON
{
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}- Duration: 6h 31m
- Radius: 806 meters
- Data Points: 44 AIS positions
- Centroid: 46.6517, 142.5522
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
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}- Duration: 6h 31m
- Radius: 806 meters
- Data Points: 44 AIS positions
- Centroid: 46.6517, 142.5522
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
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}- Zone: Sakhalin South Approach
- Duration: 6h 32m
- Data Points: 34 AIS positions
- Period: 2026-10-22T19:46:23+00:00 to 2026-10-23T02:18:59+00:00
Show Raw Evidence JSON
{
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- Duration: 6h 32m
- Data Points: 34 AIS positions
- Period: 2026-10-22T19:46:23+00:00 to 2026-10-23T02:18:59+00:00
Show Raw Evidence JSON
{
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}- Duration: 6h 32m
- Radius: 906 meters
- Data Points: 34 AIS positions
- Centroid: 46.6529, 142.5552
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
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}- Duration: 6h 32m
- Radius: 906 meters
- Data Points: 34 AIS positions
- Centroid: 46.6529, 142.5552
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
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- Duration: 6h 30m
- Data Points: 23 AIS positions
- Period: 2026-10-22T18:44:15+00:00 to 2026-10-23T01:14:50+00:00
Show Raw Evidence JSON
{
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- Duration: 6h 30m
- Data Points: 23 AIS positions
- Period: 2026-10-22T18:44:15+00:00 to 2026-10-23T01:14:50+00:00
Show Raw Evidence JSON
{
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}- Duration: 6h 30m
- Radius: 87 meters
- Data Points: 23 AIS positions
- Centroid: 46.6549, 142.5570
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
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}- Duration: 6h 30m
- Radius: 87 meters
- Data Points: 23 AIS positions
- Centroid: 46.6549, 142.5570
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
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}- Zone: Sakhalin South Approach
- Duration: 6h 32m
- Data Points: 22 AIS positions
- Period: 2026-10-22T17:55:10+00:00 to 2026-10-23T00:27:08+00:00
Show Raw Evidence JSON
{
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- Duration: 6h 32m
- Data Points: 22 AIS positions
- Period: 2026-10-22T17:55:10+00:00 to 2026-10-23T00:27:08+00:00
Show Raw Evidence JSON
{
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}- Duration: 6h 32m
- Radius: 57 meters
- Data Points: 22 AIS positions
- Centroid: 46.6549, 142.5570
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
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}- Duration: 6h 32m
- Radius: 57 meters
- Data Points: 22 AIS positions
- Centroid: 46.6549, 142.5570
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
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}- Zone: Sakhalin South Approach
- Duration: 6h 31m
- Data Points: 7 AIS positions
- Period: 2026-10-22T12:52:36+00:00 to 2026-10-22T19:23:58+00:00
Show Raw Evidence JSON
{
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}- Zone: Prigorodnoye/Sakhalin LNG
- Duration: 6h 31m
- Data Points: 7 AIS positions
- Period: 2026-10-22T12:52:36+00:00 to 2026-10-22T19:23:58+00:00
Show Raw Evidence JSON
{
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}- Zone: Sakhalin South Approach
- Duration: 6h 11m
- Data Points: 5 AIS positions
- Period: 2026-10-22T11:45:56+00:00 to 2026-10-22T17:57:30+00:00
Show Raw Evidence JSON
{
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}- Zone: Prigorodnoye/Sakhalin LNG
- Duration: 6h 11m
- Data Points: 5 AIS positions
- Period: 2026-10-22T11:45:56+00:00 to 2026-10-22T17:57:30+00:00
Show Raw Evidence JSON
{
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}- Zone: Sakhalin South Approach
- Duration: 2h 37m
- Data Points: 5 AIS positions
- Period: 2026-10-22T10:20:48+00:00 to 2026-10-22T12:58:14+00:00
Show Raw Evidence JSON
{
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}- Zone: Prigorodnoye/Sakhalin LNG
- Duration: 2h 37m
- Data Points: 5 AIS positions
- Period: 2026-10-22T10:20:48+00:00 to 2026-10-22T12:58:14+00:00
Show Raw Evidence JSON
{
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}- Zone: Sakhalin South Approach
- Duration: 4h 49m
- Data Points: 9 AIS positions
- Period: 2026-10-22T08:08:41+00:00 to 2026-10-22T12:58:14+00:00
Show Raw Evidence JSON
{
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- Duration: 4h 49m
- Data Points: 9 AIS positions
- Period: 2026-10-22T08:08:41+00:00 to 2026-10-22T12:58:14+00:00
Show Raw Evidence JSON
{
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}- Zone: Sakhalin South Approach
- Duration: 5h 49m
- Data Points: 12 AIS positions
- Period: 2026-10-22T07:08:57+00:00 to 2026-10-22T12:58:14+00:00
Show Raw Evidence JSON
{
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- Duration: 5h 49m
- Data Points: 12 AIS positions
- Period: 2026-10-22T07:08:57+00:00 to 2026-10-22T12:58:14+00:00
Show Raw Evidence JSON
{
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}- Duration: 5h 49m
- Radius: 114 meters
- Data Points: 12 AIS positions
- Centroid: 46.6543, 142.5573
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
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}- Duration: 5h 49m
- Radius: 114 meters
- Data Points: 12 AIS positions
- Centroid: 46.6543, 142.5573
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
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}- Zone: Sakhalin South Approach
- Duration: 6h 11m
- Data Points: 13 AIS positions
- Period: 2026-10-22T06:46:45+00:00 to 2026-10-22T12:58:14+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"dwell_minutes": 371.5,
"points_in_zone": 13,
"first_point": {
"ts": "2026-10-22T06:46:45+00:00",
"lat": 46.6532667000000031976014724932610988616943359375,
"lon": 142.55703330000000050858943723142147064208984375
},
"last_point": {
"ts": "2026-10-22T12:58:14+00:00",
"lat": 46.6545167000000020607330952771008014678955078125,
"lon": 142.55725000000001045918907038867473602294921875
}
}- Zone: Prigorodnoye/Sakhalin LNG
- Duration: 6h 11m
- Data Points: 13 AIS positions
- Period: 2026-10-22T06:46:45+00:00 to 2026-10-22T12:58:14+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"dwell_minutes": 371.5,
"points_in_zone": 13,
"first_point": {
"ts": "2026-10-22T06:46:45+00:00",
"lat": 46.6532667000000031976014724932610988616943359375,
"lon": 142.55703330000000050858943723142147064208984375
},
"last_point": {
"ts": "2026-10-22T12:58:14+00:00",
"lat": 46.6545167000000020607330952771008014678955078125,
"lon": 142.55725000000001045918907038867473602294921875
}
}- Duration: 6h 11m
- Radius: 105 meters
- Data Points: 13 AIS positions
- Centroid: 46.6542, 142.5573
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
"radius_m": 104.900000000000005684341886080801486968994140625,
"duration_minutes": 371.5,
"points": 13,
"centroid": {
"lat": 46.6541897538461540762000367976725101470947265625,
"lon": 142.5572705153846300163422711193561553955078125
},
"bbox": {
"min_lat": 46.6532667000000031976014724932610988616943359375,
"min_lon": 142.55698330000001305961632169783115386962890625,
"max_lat": 46.65485000000000326281224261038005352020263671875,
"max_lon": 142.557466699999991988079273141920566558837890625
},
"zone_id": "russia_prigorodnoye"
}- Duration: 6h 11m
- Radius: 105 meters
- Data Points: 13 AIS positions
- Centroid: 46.6542, 142.5573
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
"radius_m": 104.900000000000005684341886080801486968994140625,
"duration_minutes": 371.5,
"points": 13,
"centroid": {
"lat": 46.6541897538461540762000367976725101470947265625,
"lon": 142.5572705153846300163422711193561553955078125
},
"bbox": {
"min_lat": 46.6532667000000031976014724932610988616943359375,
"min_lon": 142.55698330000001305961632169783115386962890625,
"max_lat": 46.65485000000000326281224261038005352020263671875,
"max_lon": 142.557466699999991988079273141920566558837890625
},
"zone_id": "russia_sakhalin_south"
}- Zone: Prigorodnoye/Sakhalin LNG
- Duration: 6h 24m
- Data Points: 21 AIS positions
- Period: 2026-10-22T05:21:56+00:00 to 2026-10-22T11:45:56+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"dwell_minutes": 384,
"points_in_zone": 21,
"first_point": {
"ts": "2026-10-22T05:21:56+00:00",
"lat": 46.65308329999999870096871745772659778594970703125,
"lon": 142.55678330000000642030499875545501708984375
},
"last_point": {
"ts": "2026-10-22T11:45:56+00:00",
"lat": 46.6544166999999987410774338059127330780029296875,
"lon": 142.557466699999991988079273141920566558837890625
}
}- Zone: Sakhalin South Approach
- Duration: 6h 24m
- Data Points: 21 AIS positions
- Period: 2026-10-22T05:21:56+00:00 to 2026-10-22T11:45:56+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"dwell_minutes": 384,
"points_in_zone": 21,
"first_point": {
"ts": "2026-10-22T05:21:56+00:00",
"lat": 46.65308329999999870096871745772659778594970703125,
"lon": 142.55678330000000642030499875545501708984375
},
"last_point": {
"ts": "2026-10-22T11:45:56+00:00",
"lat": 46.6544166999999987410774338059127330780029296875,
"lon": 142.557466699999991988079273141920566558837890625
}
}- Duration: 6h 24m
- Radius: 142 meters
- Data Points: 21 AIS positions
- Centroid: 46.6536, 142.5570
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
"radius_m": 141.599999999999994315658113919198513031005859375,
"duration_minutes": 384,
"points": 21,
"centroid": {
"lat": 46.653583333333330074310651980340480804443359375,
"lon": 142.5569825333333255912293680012226104736328125
},
"bbox": {
"min_lat": 46.65268329999999963320078677497804164886474609375,
"min_lon": 142.556283299999989822026691399514675140380859375,
"max_lat": 46.65485000000000326281224261038005352020263671875,
"max_lon": 142.557466699999991988079273141920566558837890625
},
"zone_id": "russia_prigorodnoye"
}- Duration: 6h 24m
- Radius: 142 meters
- Data Points: 21 AIS positions
- Centroid: 46.6536, 142.5570
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
"radius_m": 141.599999999999994315658113919198513031005859375,
"duration_minutes": 384,
"points": 21,
"centroid": {
"lat": 46.653583333333330074310651980340480804443359375,
"lon": 142.5569825333333255912293680012226104736328125
},
"bbox": {
"min_lat": 46.65268329999999963320078677497804164886474609375,
"min_lon": 142.556283299999989822026691399514675140380859375,
"max_lat": 46.65485000000000326281224261038005352020263671875,
"max_lon": 142.557466699999991988079273141920566558837890625
},
"zone_id": "russia_sakhalin_south"
}- Zone: Prigorodnoye/Sakhalin LNG
- Duration: 6h 26m
- Data Points: 24 AIS positions
- Period: 2026-10-22T04:28:11+00:00 to 2026-10-22T10:54:22+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"dwell_minutes": 386.19999999999998863131622783839702606201171875,
"points_in_zone": 24,
"first_point": {
"ts": "2026-10-22T04:28:11+00:00",
"lat": 46.653216700000001537773641757667064666748046875,
"lon": 142.557016699999991260483511723577976226806640625
},
"last_point": {
"ts": "2026-10-22T10:54:22+00:00",
"lat": 46.6545832999999987578121363185346126556396484375,
"lon": 142.557383299999997916529537178575992584228515625
}
}- Zone: Sakhalin South Approach
- Duration: 6h 26m
- Data Points: 24 AIS positions
- Period: 2026-10-22T04:28:11+00:00 to 2026-10-22T10:54:22+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"dwell_minutes": 386.19999999999998863131622783839702606201171875,
"points_in_zone": 24,
"first_point": {
"ts": "2026-10-22T04:28:11+00:00",
"lat": 46.653216700000001537773641757667064666748046875,
"lon": 142.557016699999991260483511723577976226806640625
},
"last_point": {
"ts": "2026-10-22T10:54:22+00:00",
"lat": 46.6545832999999987578121363185346126556396484375,
"lon": 142.557383299999997916529537178575992584228515625
}
}- Duration: 6h 26m
- Radius: 156 meters
- Data Points: 24 AIS positions
- Centroid: 46.6535, 142.5569
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
"radius_m": 156.19999999999998863131622783839702606201171875,
"duration_minutes": 386.19999999999998863131622783839702606201171875,
"points": 24,
"centroid": {
"lat": 46.65345694583333369109823252074420452117919921875,
"lon": 142.556918745833314687843085266649723052978515625
},
"bbox": {
"min_lat": 46.65268329999999963320078677497804164886474609375,
"min_lon": 142.556283299999989822026691399514675140380859375,
"max_lat": 46.65485000000000326281224261038005352020263671875,
"max_lon": 142.557383299999997916529537178575992584228515625
},
"zone_id": "russia_prigorodnoye"
}- Duration: 6h 26m
- Radius: 156 meters
- Data Points: 24 AIS positions
- Centroid: 46.6535, 142.5569
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
"radius_m": 156.19999999999998863131622783839702606201171875,
"duration_minutes": 386.19999999999998863131622783839702606201171875,
"points": 24,
"centroid": {
"lat": 46.65345694583333369109823252074420452117919921875,
"lon": 142.556918745833314687843085266649723052978515625
},
"bbox": {
"min_lat": 46.65268329999999963320078677497804164886474609375,
"min_lon": 142.556283299999989822026691399514675140380859375,
"max_lat": 46.65485000000000326281224261038005352020263671875,
"max_lon": 142.557383299999997916529537178575992584228515625
},
"zone_id": "russia_sakhalin_south"
}- Zone: Prigorodnoye/Sakhalin LNG
- Duration: 6h 25m
- Data Points: 25 AIS positions
- Period: 2026-10-22T03:55:17+00:00 to 2026-10-22T10:20:48+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"dwell_minutes": 385.5,
"points_in_zone": 25,
"first_point": {
"ts": "2026-10-22T03:55:17+00:00",
"lat": 46.652766700000000810177880339324474334716796875,
"lon": 142.5563667000000123152858577668666839599609375
},
"last_point": {
"ts": "2026-10-22T10:20:48+00:00",
"lat": 46.65485000000000326281224261038005352020263671875,
"lon": 142.557183299999991277218214236199855804443359375
}
}- Zone: Sakhalin South Approach
- Duration: 6h 25m
- Data Points: 25 AIS positions
- Period: 2026-10-22T03:55:17+00:00 to 2026-10-22T10:20:48+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"dwell_minutes": 385.5,
"points_in_zone": 25,
"first_point": {
"ts": "2026-10-22T03:55:17+00:00",
"lat": 46.652766700000000810177880339324474334716796875,
"lon": 142.5563667000000123152858577668666839599609375
},
"last_point": {
"ts": "2026-10-22T10:20:48+00:00",
"lat": 46.65485000000000326281224261038005352020263671875,
"lon": 142.557183299999991277218214236199855804443359375
}
}- Duration: 6h 25m
- Radius: 167 meters
- Data Points: 25 AIS positions
- Centroid: 46.6534, 142.5569
- Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
"radius_m": 166.80000000000001136868377216160297393798828125,
"duration_minutes": 385.5,
"points": 25,
"centroid": {
"lat": 46.653365336000007346228812821209430694580078125,
"lon": 142.5568680000000085783540271222591400146484375
},
"bbox": {
"min_lat": 46.65268329999999963320078677497804164886474609375,
"min_lon": 142.556283299999989822026691399514675140380859375,
"max_lat": 46.65485000000000326281224261038005352020263671875,
"max_lon": 142.5573666999999886684236116707324981689453125
},
"zone_id": "russia_prigorodnoye"
}- Duration: 6h 25m
- Radius: 167 meters
- Data Points: 25 AIS positions
- Centroid: 46.6534, 142.5569
- Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
"radius_m": 166.80000000000001136868377216160297393798828125,
"duration_minutes": 385.5,
"points": 25,
"centroid": {
"lat": 46.653365336000007346228812821209430694580078125,
"lon": 142.5568680000000085783540271222591400146484375
},
"bbox": {
"min_lat": 46.65268329999999963320078677497804164886474609375,
"min_lon": 142.556283299999989822026691399514675140380859375,
"max_lat": 46.65485000000000326281224261038005352020263671875,
"max_lon": 142.5573666999999886684236116707324981689453125
},
"zone_id": "russia_sakhalin_south"
}- Zone: Prigorodnoye/Sakhalin LNG
- Duration: 6h 38m
- Data Points: 31 AIS positions
- Period: 2026-10-22T02:20:57+00:00 to 2026-10-22T08:59:27+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_prigorodnoye",
"zone_name": "Prigorodnoye\/Sakhalin LNG",
"dwell_minutes": 398.5,
"points_in_zone": 31,
"first_point": {
"ts": "2026-10-22T02:20:57+00:00",
"lat": 46.65308329999999870096871745772659778594970703125,
"lon": 142.55684999999999718056642450392246246337890625
},
"last_point": {
"ts": "2026-10-22T08:59:27+00:00",
"lat": 46.65448330000000254358383244834840297698974609375,
"lon": 142.557316700000001219450496137142181396484375
}
}- Zone: Sakhalin South Approach
- Duration: 6h 38m
- Data Points: 31 AIS positions
- Period: 2026-10-22T02:20:57+00:00 to 2026-10-22T08:59:27+00:00
Show Raw Evidence JSON
{
"zone_id": "russia_sakhalin_south",
"zone_name": "Sakhalin South Approach",
"dwell_minutes": 398.5,
"points_in_zone": 31,
"first_point": {
"ts": "2026-10-22T02:20:57+00:00",
"lat": 46.65308329999999870096871745772659778594970703125,
"lon": 142.55684999999999718056642450392246246337890625
},
"last_point": {
"ts": "2026-10-22T08:59:27+00:00",
"lat": 46.65448330000000254358383244834840297698974609375,
"lon": 142.557316700000001219450496137142181396484375
}
}Recent Position Data
| Time (UTC) | Lat | Lon | Speed | Course | Zone |
|---|---|---|---|---|---|
| Oct 23 08:52 | 46.6497 | 142.5426 | 0.2 kn | 359.3° | Prigorodnoye/Sakhalin LNG |
| Oct 23 08:44 | 46.6494 | 142.5429 | 0.1 kn | 318.5° | Prigorodnoye/Sakhalin LNG |
| Oct 23 08:42 | 46.6494 | 142.5429 | 0.1 kn | 321.4° | Prigorodnoye/Sakhalin LNG |
| Oct 23 08:34 | 46.6494 | 142.5429 | 0.0 kn | 360.0° | Prigorodnoye/Sakhalin LNG |
| Oct 23 08:28 | 46.6495 | 142.5429 | 0.0 kn | 360.0° | Prigorodnoye/Sakhalin LNG |
| Oct 23 08:19 | 46.6494 | 142.5428 | 0.0 kn | 360.0° | Prigorodnoye/Sakhalin LNG |
| Oct 23 08:13 | 46.6494 | 142.5429 | 0.1 kn | 320.6° | Prigorodnoye/Sakhalin LNG |
| Oct 23 07:40 | 46.6493 | 142.5430 | 0.0 kn | 360.0° | Prigorodnoye/Sakhalin LNG |
| Oct 23 06:43 | 46.6492 | 142.5430 | 0.0 kn | 360.0° | Prigorodnoye/Sakhalin LNG |
| Oct 23 06:34 | 46.6489 | 142.5431 | 0.1 kn | 65.9° | Prigorodnoye/Sakhalin LNG |
| Oct 23 05:55 | 46.6489 | 142.5431 | 0.1 kn | 155.9° | Prigorodnoye/Sakhalin LNG |
| Oct 23 04:59 | 46.6488 | 142.5431 | 0.3 kn | 334.7° | Prigorodnoye/Sakhalin LNG |
| Oct 23 04:25 | 46.6484 | 142.5431 | 0.0 kn | 360.0° | Prigorodnoye/Sakhalin LNG |
| Oct 23 03:52 | 46.6482 | 142.5431 | 0.0 kn | 360.0° | Prigorodnoye/Sakhalin LNG |
| Oct 23 03:07 | 46.6485 | 142.5431 | 0.0 kn | 360.0° | Prigorodnoye/Sakhalin LNG |
| Oct 23 03:04 | 46.6485 | 142.5431 | 0.0 kn | 360.0° | Prigorodnoye/Sakhalin LNG |
| Oct 23 03:00 | 46.6484 | 142.5430 | 0.1 kn | 356.8° | Prigorodnoye/Sakhalin LNG |
| Oct 23 02:56 | 46.6484 | 142.5429 | 0.1 kn | 77.1° | Prigorodnoye/Sakhalin LNG |
| Oct 23 02:54 | 46.6484 | 142.5430 | 0.0 kn | 360.0° | Prigorodnoye/Sakhalin LNG |
| Oct 23 02:46 | 46.6485 | 142.5429 | 0.1 kn | 119.6° | Prigorodnoye/Sakhalin LNG |
Showing 20 of 100 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.
