GLORISEA

IMO 9917402

Vessel information

Vessel Name GLORISEA
IMO Number 9917402
MMSI 477664300
Vessel Type Tanker
Flag 🇭🇰 HONG KONG
Call Sign VRTV7
Length 118 m
Beam 18 m

Detected Events (100)

Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 22:09 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 1h 55m
  • Data Points: 33 AIS positions
  • Period: 2026-10-07T22:09:56+00:00 to 2026-10-08T00:05:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 115.7000000000000028421709430404007434844970703125,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-10-07T22:09:56+00:00",
        "lat": 46.37380499999999727833710494451224803924560546875,
        "lon": 142.69905499999998710336512885987758636474609375
    },
    "last_point": {
        "ts": "2026-10-08T00:05:39+00:00",
        "lat": 46.262623300000001336229615844786167144775390625,
        "lon": 142.731081700000004275352694094181060791015625
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 22:09 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 1h 55m
  • Data Points: 33 AIS positions
  • Period: 2026-10-07T22:09:56+00:00 to 2026-10-08T00:05:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 115.7000000000000028421709430404007434844970703125,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-10-07T22:09:56+00:00",
        "lat": 46.37380499999999727833710494451224803924560546875,
        "lon": 142.69905499999998710336512885987758636474609375
    },
    "last_point": {
        "ts": "2026-10-08T00:05:39+00:00",
        "lat": 46.262623300000001336229615844786167144775390625,
        "lon": 142.731081700000004275352694094181060791015625
    }
}
Methodology: 2026.01.18
Sts Prigorodnoye/Sakhalin LNG
Oct 7, 2026 22:01 UTC 80/100 ▼
Vessel A: IMO 9004310 (ORIS) TOGO
Vessel B: IMO 9917402 (GLORISEA) HONG KONG
  • Minimum Distance: 10 meters
  • Average Distance: 19 meters
  • Duration: 56 minutes
  • Period: 2026-10-07T22:01:58+00:00 to 2026-10-07T22:58:08+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ORIS and GLORISEA) maintained close proximity (min 10m, avg 19m) for 56 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
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 19m
Duration10/25Duration 56 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "vessel_b": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "min_distance_m": 9.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 19.10000000000000142108547152020037174224853515625,
    "distance_consistency_m": 4.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 56.2000000000000028421709430404007434844970703125,
    "overlap_duration_s": 3370,
    "speed_a_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T22:01:58+00:00",
        "end": "2026-10-07T22:58:08+00:00"
    },
    "points_count": {
        "vessel_a": 21,
        "vessel_b": 21
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 19m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 56 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ORIS and GLORISEA) maintained close proximity (min 10m, avg 19m) for 56 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."
    }
}
Methodology: 2026.01.18
Sts Sakhalin South Approach
Oct 7, 2026 22:01 UTC 80/100 ▼
Vessel A: IMO 9004310 (ORIS) TOGO
Vessel B: IMO 9917402 (GLORISEA) HONG KONG
  • Minimum Distance: 10 meters
  • Average Distance: 19 meters
  • Duration: 56 minutes
  • Period: 2026-10-07T22:01:58+00:00 to 2026-10-07T22:58:08+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ORIS and GLORISEA) maintained close proximity (min 10m, avg 19m) for 56 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
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 19m
Duration10/25Duration 56 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "vessel_b": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "min_distance_m": 9.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 19.10000000000000142108547152020037174224853515625,
    "distance_consistency_m": 4.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 56.2000000000000028421709430404007434844970703125,
    "overlap_duration_s": 3370,
    "speed_a_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T22:01:58+00:00",
        "end": "2026-10-07T22:58:08+00:00"
    },
    "points_count": {
        "vessel_a": 21,
        "vessel_b": 21
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 19m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 56 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ORIS and GLORISEA) maintained close proximity (min 10m, avg 19m) for 56 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."
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 21:09 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 2h 55m
  • Data Points: 36 AIS positions
  • Period: 2026-10-07T21:09:56+00:00 to 2026-10-08T00:05:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 175.69999999999998863131622783839702606201171875,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-10-07T21:09:56+00:00",
        "lat": 46.373598299999997607301338575780391693115234375,
        "lon": 142.69893830000000889413058757781982421875
    },
    "last_point": {
        "ts": "2026-10-08T00:05:39+00:00",
        "lat": 46.262623300000001336229615844786167144775390625,
        "lon": 142.731081700000004275352694094181060791015625
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 21:09 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 2h 55m
  • Data Points: 36 AIS positions
  • Period: 2026-10-07T21:09:56+00:00 to 2026-10-08T00:05:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 175.69999999999998863131622783839702606201171875,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-10-07T21:09:56+00:00",
        "lat": 46.373598299999997607301338575780391693115234375,
        "lon": 142.69893830000000889413058757781982421875
    },
    "last_point": {
        "ts": "2026-10-08T00:05:39+00:00",
        "lat": 46.262623300000001336229615844786167144775390625,
        "lon": 142.731081700000004275352694094181060791015625
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 21:09 UTC 75.0% ▼
  • Duration: 2h 20m
  • Radius: 660 meters
  • Data Points: 20 AIS positions
  • Centroid: 46.3738, 142.6983
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 660.3999999999999772626324556767940521240234375,
    "duration_minutes": 140.400000000000005684341886080801486968994140625,
    "points": 20,
    "centroid": {
        "lat": 46.37375183500000019876097212545573711395263671875,
        "lon": 142.698323500000043395630200393497943878173828125
    },
    "bbox": {
        "min_lat": 46.368026700000001483203959651291370391845703125,
        "min_lon": 142.694753300000002127490006387233734130859375,
        "max_lat": 46.37545329999999665915311197750270366668701171875,
        "max_lon": 142.700614999999999099600245244801044464111328125
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 21:09 UTC 75.0% ▼
  • Duration: 2h 20m
  • Radius: 660 meters
  • Data Points: 20 AIS positions
  • Centroid: 46.3738, 142.6983
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 660.3999999999999772626324556767940521240234375,
    "duration_minutes": 140.400000000000005684341886080801486968994140625,
    "points": 20,
    "centroid": {
        "lat": 46.37375183500000019876097212545573711395263671875,
        "lon": 142.698323500000043395630200393497943878173828125
    },
    "bbox": {
        "min_lat": 46.368026700000001483203959651291370391845703125,
        "min_lon": 142.694753300000002127490006387233734130859375,
        "max_lat": 46.37545329999999665915311197750270366668701171875,
        "max_lon": 142.700614999999999099600245244801044464111328125
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Sts Prigorodnoye/Sakhalin LNG
Oct 7, 2026 20:49 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 10 meters
  • Average Distance: 19 meters
  • Duration: 2h 39m
  • Period: 2026-10-07T20:18:52+00:00 to 2026-10-07T22:57:51+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 19m) for 159 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
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 19m
Duration25/25Duration 159 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 9.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 18.89999999999999857891452847979962825775146484375,
    "distance_consistency_m": 3.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 159,
    "overlap_duration_s": 9539,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T20:18:52+00:00",
        "end": "2026-10-07T22:57:51+00:00"
    },
    "points_count": {
        "vessel_a": 15,
        "vessel_b": 15
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 19m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 159 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 19m) for 159 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."
    }
}
Methodology: 2026.01.18
Sts Sakhalin South Approach
Oct 7, 2026 20:49 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 10 meters
  • Average Distance: 19 meters
  • Duration: 2h 39m
  • Period: 2026-10-07T20:18:52+00:00 to 2026-10-07T22:57:51+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 19m) for 159 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
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 19m
Duration25/25Duration 159 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 9.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 18.89999999999999857891452847979962825775146484375,
    "distance_consistency_m": 3.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 159,
    "overlap_duration_s": 9539,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T20:18:52+00:00",
        "end": "2026-10-07T22:57:51+00:00"
    },
    "points_count": {
        "vessel_a": 15,
        "vessel_b": 15
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 19m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 159 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 19m) for 159 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."
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 20:18 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 3h 46m
  • Data Points: 38 AIS positions
  • Period: 2026-10-07T20:18:52+00:00 to 2026-10-08T00:05:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 226.80000000000001136868377216160297393798828125,
    "points_in_zone": 38,
    "first_point": {
        "ts": "2026-10-07T20:18:52+00:00",
        "lat": 46.37348999999999676902007195167243480682373046875,
        "lon": 142.698769999999996116457623429596424102783203125
    },
    "last_point": {
        "ts": "2026-10-08T00:05:39+00:00",
        "lat": 46.262623300000001336229615844786167144775390625,
        "lon": 142.731081700000004275352694094181060791015625
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 20:18 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 3h 46m
  • Data Points: 38 AIS positions
  • Period: 2026-10-07T20:18:52+00:00 to 2026-10-08T00:05:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 226.80000000000001136868377216160297393798828125,
    "points_in_zone": 38,
    "first_point": {
        "ts": "2026-10-07T20:18:52+00:00",
        "lat": 46.37348999999999676902007195167243480682373046875,
        "lon": 142.698769999999996116457623429596424102783203125
    },
    "last_point": {
        "ts": "2026-10-08T00:05:39+00:00",
        "lat": 46.262623300000001336229615844786167144775390625,
        "lon": 142.731081700000004275352694094181060791015625
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 20:18 UTC 75.0% ▼
  • Duration: 3h 11m
  • Radius: 657 meters
  • Data Points: 22 AIS positions
  • Centroid: 46.3737, 142.6984
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 656.6000000000000227373675443232059478759765625,
    "duration_minutes": 191.400000000000005684341886080801486968994140625,
    "points": 22,
    "centroid": {
        "lat": 46.37372538181818271141310106031596660614013671875,
        "lon": 142.698370304545505860005505383014678955078125
    },
    "bbox": {
        "min_lat": 46.368026700000001483203959651291370391845703125,
        "min_lon": 142.694753300000002127490006387233734130859375,
        "max_lat": 46.37545329999999665915311197750270366668701171875,
        "max_lon": 142.700614999999999099600245244801044464111328125
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 20:18 UTC 75.0% ▼
  • Duration: 3h 11m
  • Radius: 657 meters
  • Data Points: 22 AIS positions
  • Centroid: 46.3737, 142.6984
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 656.6000000000000227373675443232059478759765625,
    "duration_minutes": 191.400000000000005684341886080801486968994140625,
    "points": 22,
    "centroid": {
        "lat": 46.37372538181818271141310106031596660614013671875,
        "lon": 142.698370304545505860005505383014678955078125
    },
    "bbox": {
        "min_lat": 46.368026700000001483203959651291370391845703125,
        "min_lon": 142.694753300000002127490006387233734130859375,
        "max_lat": 46.37545329999999665915311197750270366668701171875,
        "max_lon": 142.700614999999999099600245244801044464111328125
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Sts🛰️✗ Prigorodnoye/Sakhalin LNG
Oct 7, 2026 19:15 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 10 meters
  • Average Distance: 20 meters
  • Duration: 3h 41m
  • Period: 2026-10-07T19:15:57+00:00 to 2026-10-07T22:57:51+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 20m) for 222 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
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 20m
Duration25/25Duration 222 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-08T01:45:01.368412+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 9.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 19.5,
    "distance_consistency_m": 3.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 221.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 13314,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T19:15:57+00:00",
        "end": "2026-10-07T22:57:51+00:00"
    },
    "points_count": {
        "vessel_a": 18,
        "vessel_b": 18
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 222 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 20m) for 222 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": 46.3736904000000009773430065251886844635009765625,
            "lon": 142.698874399999994011523085646331310272216796875
        },
        "time_window": {
            "start_ts": "2026-10-07T19:15:57+00:00",
            "end_ts": "2026-10-07T22:57:51+00:00"
        },
        "searched_at": "2026-10-08T01:45:01.368412+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Sakhalin South Approach
Oct 7, 2026 19:15 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 10 meters
  • Average Distance: 20 meters
  • Duration: 3h 41m
  • Period: 2026-10-07T19:15:57+00:00 to 2026-10-07T22:57:51+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 20m) for 222 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
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 20m
Duration25/25Duration 222 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-08T01:45:04.014358+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 9.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 19.5,
    "distance_consistency_m": 3.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 221.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 13314,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T19:15:57+00:00",
        "end": "2026-10-07T22:57:51+00:00"
    },
    "points_count": {
        "vessel_a": 18,
        "vessel_b": 18
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 222 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 20m) for 222 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": 46.3736904000000009773430065251886844635009765625,
            "lon": 142.698874399999994011523085646331310272216796875
        },
        "time_window": {
            "start_ts": "2026-10-07T19:15:57+00:00",
            "end_ts": "2026-10-07T22:57:51+00:00"
        },
        "searched_at": "2026-10-08T01:45:04.014358+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 19:00 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 5h 4m
  • Data Points: 42 AIS positions
  • Period: 2026-10-07T19:00:53+00:00 to 2026-10-08T00:05:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 304.80000000000001136868377216160297393798828125,
    "points_in_zone": 42,
    "first_point": {
        "ts": "2026-10-07T19:00:53+00:00",
        "lat": 46.37251499999999992951416061259806156158447265625,
        "lon": 142.698274999999995316102285869419574737548828125
    },
    "last_point": {
        "ts": "2026-10-08T00:05:39+00:00",
        "lat": 46.262623300000001336229615844786167144775390625,
        "lon": 142.731081700000004275352694094181060791015625
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 19:00 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 5h 4m
  • Data Points: 42 AIS positions
  • Period: 2026-10-07T19:00:53+00:00 to 2026-10-08T00:05:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 304.80000000000001136868377216160297393798828125,
    "points_in_zone": 42,
    "first_point": {
        "ts": "2026-10-07T19:00:53+00:00",
        "lat": 46.37251499999999992951416061259806156158447265625,
        "lon": 142.698274999999995316102285869419574737548828125
    },
    "last_point": {
        "ts": "2026-10-08T00:05:39+00:00",
        "lat": 46.262623300000001336229615844786167144775390625,
        "lon": 142.731081700000004275352694094181060791015625
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 19:00 UTC 75.0% ▼
  • Duration: 4h 29m
  • Radius: 639 meters
  • Data Points: 26 AIS positions
  • Centroid: 46.3736, 142.6984
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 639.1000000000000227373675443232059478759765625,
    "duration_minutes": 269.3999999999999772626324556767940521240234375,
    "points": 26,
    "centroid": {
        "lat": 46.37356083461538247547650826163589954376220703125,
        "lon": 142.6983647423077172788907773792743682861328125
    },
    "bbox": {
        "min_lat": 46.368026700000001483203959651291370391845703125,
        "min_lon": 142.694753300000002127490006387233734130859375,
        "max_lat": 46.37545329999999665915311197750270366668701171875,
        "max_lon": 142.700614999999999099600245244801044464111328125
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 19:00 UTC 75.0% ▼
  • Duration: 4h 29m
  • Radius: 639 meters
  • Data Points: 26 AIS positions
  • Centroid: 46.3736, 142.6984
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 639.1000000000000227373675443232059478759765625,
    "duration_minutes": 269.3999999999999772626324556767940521240234375,
    "points": 26,
    "centroid": {
        "lat": 46.37356083461538247547650826163589954376220703125,
        "lon": 142.6983647423077172788907773792743682861328125
    },
    "bbox": {
        "min_lat": 46.368026700000001483203959651291370391845703125,
        "min_lon": 142.694753300000002127490006387233734130859375,
        "max_lat": 46.37545329999999665915311197750270366668701171875,
        "max_lon": 142.700614999999999099600245244801044464111328125
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Sts🛰️✗ Prigorodnoye/Sakhalin LNG
Oct 7, 2026 18:03 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 10 meters
  • Average Distance: 19 meters
  • Duration: 4h 53m
  • Period: 2026-10-07T18:03:56+00:00 to 2026-10-07T22:57:51+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 19m) for 294 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
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 19m
Duration25/25Duration 294 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-08T00:30:06.794470+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 9.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 19.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 293.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 17635,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T18:03:56+00:00",
        "end": "2026-10-07T22:57:51+00:00"
    },
    "points_count": {
        "vessel_a": 27,
        "vessel_b": 27
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 19m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 294 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 19m) for 294 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": 46.37336619999999953734004520811140537261962890625,
            "lon": 142.698718399999989969728630967438220977783203125
        },
        "time_window": {
            "start_ts": "2026-10-07T18:03:56+00:00",
            "end_ts": "2026-10-07T22:57:51+00:00"
        },
        "searched_at": "2026-10-08T00:30:06.794470+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Sakhalin South Approach
Oct 7, 2026 18:03 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 10 meters
  • Average Distance: 19 meters
  • Duration: 4h 53m
  • Period: 2026-10-07T18:03:56+00:00 to 2026-10-07T22:57:51+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 19m) for 294 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
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 19m
Duration25/25Duration 294 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-08T00:30:11.384610+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 9.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 19.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 293.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 17635,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T18:03:56+00:00",
        "end": "2026-10-07T22:57:51+00:00"
    },
    "points_count": {
        "vessel_a": 27,
        "vessel_b": 27
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 19m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 294 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 19m) for 294 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": 46.37336619999999953734004520811140537261962890625,
            "lon": 142.698718399999989969728630967438220977783203125
        },
        "time_window": {
            "start_ts": "2026-10-07T18:03:56+00:00",
            "end_ts": "2026-10-07T22:57:51+00:00"
        },
        "searched_at": "2026-10-08T00:30:11.384610+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 18:03 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 1m
  • Data Points: 50 AIS positions
  • Period: 2026-10-07T18:03:56+00:00 to 2026-10-08T00:05:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 361.69999999999998863131622783839702606201171875,
    "points_in_zone": 50,
    "first_point": {
        "ts": "2026-10-07T18:03:56+00:00",
        "lat": 46.37275170000000201753209694288671016693115234375,
        "lon": 142.698388300000004846879164688289165496826171875
    },
    "last_point": {
        "ts": "2026-10-08T00:05:39+00:00",
        "lat": 46.262623300000001336229615844786167144775390625,
        "lon": 142.731081700000004275352694094181060791015625
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 18:03 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 1m
  • Data Points: 50 AIS positions
  • Period: 2026-10-07T18:03:56+00:00 to 2026-10-08T00:05:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 361.69999999999998863131622783839702606201171875,
    "points_in_zone": 50,
    "first_point": {
        "ts": "2026-10-07T18:03:56+00:00",
        "lat": 46.37275170000000201753209694288671016693115234375,
        "lon": 142.698388300000004846879164688289165496826171875
    },
    "last_point": {
        "ts": "2026-10-08T00:05:39+00:00",
        "lat": 46.262623300000001336229615844786167144775390625,
        "lon": 142.731081700000004275352694094181060791015625
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 18:03 UTC 75.0% ▼
  • Duration: 5h 26m
  • Radius: 617 meters
  • Data Points: 34 AIS positions
  • Centroid: 46.3733, 142.6984
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 616.6000000000000227373675443232059478759765625,
    "duration_minutes": 326.3999999999999772626324556767940521240234375,
    "points": 34,
    "centroid": {
        "lat": 46.3733493647058736542021506465971469879150390625,
        "lon": 142.69836024411762309682671912014484405517578125
    },
    "bbox": {
        "min_lat": 46.368026700000001483203959651291370391845703125,
        "min_lon": 142.694753300000002127490006387233734130859375,
        "max_lat": 46.37545329999999665915311197750270366668701171875,
        "max_lon": 142.700614999999999099600245244801044464111328125
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 18:03 UTC 75.0% ▼
  • Duration: 5h 26m
  • Radius: 617 meters
  • Data Points: 34 AIS positions
  • Centroid: 46.3733, 142.6984
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 616.6000000000000227373675443232059478759765625,
    "duration_minutes": 326.3999999999999772626324556767940521240234375,
    "points": 34,
    "centroid": {
        "lat": 46.3733493647058736542021506465971469879150390625,
        "lon": 142.69836024411762309682671912014484405517578125
    },
    "bbox": {
        "min_lat": 46.368026700000001483203959651291370391845703125,
        "min_lon": 142.694753300000002127490006387233734130859375,
        "max_lat": 46.37545329999999665915311197750270366668701171875,
        "max_lon": 142.700614999999999099600245244801044464111328125
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Sts🛰️✗ Prigorodnoye/Sakhalin LNG
Oct 7, 2026 17:05 UTC 95/100 ▼
Vessel A: IMO 9004310 (ORIS) TOGO
Vessel B: IMO 9917402 (GLORISEA) HONG KONG
  • Minimum Distance: 11 meters
  • Average Distance: 20 meters
  • Duration: 2h 32m
  • Period: 2026-10-07T17:05:38+00:00 to 2026-10-07T19:37:57+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (ORIS and GLORISEA) maintained close proximity (min 10m, avg 20m) for 152 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye/Sakhalin LNG, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 20m
Duration25/25Duration 152 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-07T23:45:01.605936+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "vessel_b": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "min_distance_m": 10.5,
    "avg_distance_m": 20.199999999999999289457264239899814128875732421875,
    "distance_consistency_m": 6.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 152.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 9139,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-07T17:05:38+00:00",
        "end": "2026-10-07T19:37:57+00:00"
    },
    "points_count": {
        "vessel_a": 50,
        "vessel_b": 50
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 152 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ORIS and GLORISEA) maintained close proximity (min 10m, avg 20m) for 152 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.37286370000000346180968335829675197601318359375,
            "lon": 142.69847920000000840445864014327526092529296875
        },
        "time_window": {
            "start_ts": "2026-10-07T17:05:38+00:00",
            "end_ts": "2026-10-07T19:37:57+00:00"
        },
        "searched_at": "2026-10-07T23:45:01.605936+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Sakhalin South Approach
Oct 7, 2026 17:05 UTC 95/100 ▼
Vessel A: IMO 9004310 (ORIS) TOGO
Vessel B: IMO 9917402 (GLORISEA) HONG KONG
  • Minimum Distance: 11 meters
  • Average Distance: 20 meters
  • Duration: 2h 32m
  • Period: 2026-10-07T17:05:38+00:00 to 2026-10-07T19:37:57+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (ORIS and GLORISEA) maintained close proximity (min 10m, avg 20m) for 152 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 20m
Duration25/25Duration 152 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-07T23:45:04.263601+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "vessel_b": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "min_distance_m": 10.5,
    "avg_distance_m": 20.199999999999999289457264239899814128875732421875,
    "distance_consistency_m": 6.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 152.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 9139,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-07T17:05:38+00:00",
        "end": "2026-10-07T19:37:57+00:00"
    },
    "points_count": {
        "vessel_a": 50,
        "vessel_b": 50
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 152 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ORIS and GLORISEA) maintained close proximity (min 10m, avg 20m) for 152 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 46.37286370000000346180968335829675197601318359375,
            "lon": 142.69847920000000840445864014327526092529296875
        },
        "time_window": {
            "start_ts": "2026-10-07T17:05:38+00:00",
            "end_ts": "2026-10-07T19:37:57+00:00"
        },
        "searched_at": "2026-10-07T23:45:04.263601+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 17:03 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 31m
  • Data Points: 55 AIS positions
  • Period: 2026-10-07T17:33:55+00:00 to 2026-10-08T00:05:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 391.69999999999998863131622783839702606201171875,
    "points_in_zone": 55,
    "first_point": {
        "ts": "2026-10-07T17:33:55+00:00",
        "lat": 46.37290500000000292857293970882892608642578125,
        "lon": 142.698499999999995679900166578590869903564453125
    },
    "last_point": {
        "ts": "2026-10-08T00:05:39+00:00",
        "lat": 46.262623300000001336229615844786167144775390625,
        "lon": 142.731081700000004275352694094181060791015625
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 17:03 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 31m
  • Data Points: 55 AIS positions
  • Period: 2026-10-07T17:33:55+00:00 to 2026-10-08T00:05:39+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 391.69999999999998863131622783839702606201171875,
    "points_in_zone": 55,
    "first_point": {
        "ts": "2026-10-07T17:33:55+00:00",
        "lat": 46.37290500000000292857293970882892608642578125,
        "lon": 142.698499999999995679900166578590869903564453125
    },
    "last_point": {
        "ts": "2026-10-08T00:05:39+00:00",
        "lat": 46.262623300000001336229615844786167144775390625,
        "lon": 142.731081700000004275352694094181060791015625
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 17:03 UTC 75.0% ▼
  • Duration: 6h 26m
  • Radius: 608 meters
  • Data Points: 41 AIS positions
  • Centroid: 46.3733, 142.6984
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 608.3999999999999772626324556767940521240234375,
    "duration_minutes": 386.3999999999999772626324556767940521240234375,
    "points": 41,
    "centroid": {
        "lat": 46.3732780121951151386383571662008762359619140625,
        "lon": 142.6983878829267951005022041499614715576171875
    },
    "bbox": {
        "min_lat": 46.368026700000001483203959651291370391845703125,
        "min_lon": 142.694753300000002127490006387233734130859375,
        "max_lat": 46.37545329999999665915311197750270366668701171875,
        "max_lon": 142.700614999999999099600245244801044464111328125
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 17:03 UTC 75.0% ▼
  • Duration: 6h 26m
  • Radius: 608 meters
  • Data Points: 41 AIS positions
  • Centroid: 46.3733, 142.6984
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 608.3999999999999772626324556767940521240234375,
    "duration_minutes": 386.3999999999999772626324556767940521240234375,
    "points": 41,
    "centroid": {
        "lat": 46.3732780121951151386383571662008762359619140625,
        "lon": 142.6983878829267951005022041499614715576171875
    },
    "bbox": {
        "min_lat": 46.368026700000001483203959651291370391845703125,
        "min_lon": 142.694753300000002127490006387233734130859375,
        "max_lat": 46.37545329999999665915311197750270366668701171875,
        "max_lon": 142.700614999999999099600245244801044464111328125
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Sts Prigorodnoye/Sakhalin LNG
Oct 7, 2026 16:04 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 10 meters
  • Average Distance: 19 meters
  • Duration: 6h 3m
  • Period: 2026-10-07T16:54:51+00:00 to 2026-10-07T22:57:51+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 19m) for 363 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
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 19m
Duration25/25Duration 363 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 9.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 19.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 3,
    "duration_minutes": 363,
    "overlap_duration_s": 21780,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T16:54:51+00:00",
        "end": "2026-10-07T22:57:51+00:00"
    },
    "points_count": {
        "vessel_a": 35,
        "vessel_b": 35
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 19m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 363 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 19m) for 363 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."
    }
}
Methodology: 2026.01.18
Sts Sakhalin South Approach
Oct 7, 2026 16:04 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 10 meters
  • Average Distance: 19 meters
  • Duration: 6h 3m
  • Period: 2026-10-07T16:54:51+00:00 to 2026-10-07T22:57:51+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 19m) for 363 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
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 19m
Duration25/25Duration 363 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 9.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 19.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 3,
    "duration_minutes": 363,
    "overlap_duration_s": 21780,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T16:54:51+00:00",
        "end": "2026-10-07T22:57:51+00:00"
    },
    "points_count": {
        "vessel_a": 35,
        "vessel_b": 35
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 19m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 363 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 19m) for 363 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."
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 16:03 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 31m
  • Data Points: 41 AIS positions
  • Period: 2026-10-07T16:54:51+00:00 to 2026-10-07T23:26:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 391.30000000000001136868377216160297393798828125,
    "points_in_zone": 41,
    "first_point": {
        "ts": "2026-10-07T16:54:51+00:00",
        "lat": 46.37300499999999914280124357901513576507568359375,
        "lon": 142.69861670000000231084413826465606689453125
    },
    "last_point": {
        "ts": "2026-10-07T23:26:11+00:00",
        "lat": 46.37402329999999750498318462632596492767333984375,
        "lon": 142.698376700000011396696208976209163665771484375
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 16:03 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 31m
  • Data Points: 41 AIS positions
  • Period: 2026-10-07T16:54:51+00:00 to 2026-10-07T23:26:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 391.30000000000001136868377216160297393798828125,
    "points_in_zone": 41,
    "first_point": {
        "ts": "2026-10-07T16:54:51+00:00",
        "lat": 46.37300499999999914280124357901513576507568359375,
        "lon": 142.69861670000000231084413826465606689453125
    },
    "last_point": {
        "ts": "2026-10-07T23:26:11+00:00",
        "lat": 46.37402329999999750498318462632596492767333984375,
        "lon": 142.698376700000011396696208976209163665771484375
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 16:03 UTC 75.0% ▼
  • Duration: 6h 31m
  • Radius: 308 meters
  • Data Points: 41 AIS positions
  • Centroid: 46.3734, 142.6983
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 308.1000000000000227373675443232059478759765625,
    "duration_minutes": 391.30000000000001136868377216160297393798828125,
    "points": 41,
    "centroid": {
        "lat": 46.3733994341463358068722300231456756591796875,
        "lon": 142.698339143902416026321589015424251556396484375
    },
    "bbox": {
        "min_lat": 46.37251499999999992951416061259806156158447265625,
        "min_lon": 142.694753300000002127490006387233734130859375,
        "max_lat": 46.37545329999999665915311197750270366668701171875,
        "max_lon": 142.699064999999990277501638047397136688232421875
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 16:03 UTC 75.0% ▼
  • Duration: 6h 31m
  • Radius: 308 meters
  • Data Points: 41 AIS positions
  • Centroid: 46.3734, 142.6983
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 308.1000000000000227373675443232059478759765625,
    "duration_minutes": 391.30000000000001136868377216160297393798828125,
    "points": 41,
    "centroid": {
        "lat": 46.3733994341463358068722300231456756591796875,
        "lon": 142.698339143902416026321589015424251556396484375
    },
    "bbox": {
        "min_lat": 46.37251499999999992951416061259806156158447265625,
        "min_lon": 142.694753300000002127490006387233734130859375,
        "max_lat": 46.37545329999999665915311197750270366668701171875,
        "max_lon": 142.699064999999990277501638047397136688232421875
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Sts Prigorodnoye/Sakhalin LNG
Oct 7, 2026 15:55 UTC 95/100 ▼
Vessel A: IMO 9004310 (ORIS) TOGO
Vessel B: IMO 9917402 (GLORISEA) HONG KONG
  • Minimum Distance: 11 meters
  • Average Distance: 20 meters
  • Duration: 3h 42m
  • Period: 2026-10-07T15:55:28+00:00 to 2026-10-07T19:37:57+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (ORIS and GLORISEA) maintained close proximity (min 10m, avg 20m) for 222 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye/Sakhalin LNG, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 20m
Duration25/25Duration 222 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "vessel_b": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "min_distance_m": 10.5,
    "avg_distance_m": 20,
    "distance_consistency_m": 5.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 222.5,
    "overlap_duration_s": 13349,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-07T15:55:28+00:00",
        "end": "2026-10-07T19:37:57+00:00"
    },
    "points_count": {
        "vessel_a": 67,
        "vessel_b": 67
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 222 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ORIS and GLORISEA) maintained close proximity (min 10m, avg 20m) for 222 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Sakhalin South Approach
Oct 7, 2026 15:55 UTC 95/100 ▼
Vessel A: IMO 9004310 (ORIS) TOGO
Vessel B: IMO 9917402 (GLORISEA) HONG KONG
  • Minimum Distance: 11 meters
  • Average Distance: 20 meters
  • Duration: 3h 42m
  • Period: 2026-10-07T15:55:28+00:00 to 2026-10-07T19:37:57+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (ORIS and GLORISEA) maintained close proximity (min 10m, avg 20m) for 222 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 20m
Duration25/25Duration 222 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "vessel_b": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "min_distance_m": 10.5,
    "avg_distance_m": 20,
    "distance_consistency_m": 5.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 222.5,
    "overlap_duration_s": 13349,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-07T15:55:28+00:00",
        "end": "2026-10-07T19:37:57+00:00"
    },
    "points_count": {
        "vessel_a": 67,
        "vessel_b": 67
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 222 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ORIS and GLORISEA) maintained close proximity (min 10m, avg 20m) for 222 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 15:12 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 30m
  • Data Points: 31 AIS positions
  • Period: 2026-10-07T15:12:50+00:00 to 2026-10-07T21:42:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 390,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-10-07T15:12:50+00:00",
        "lat": 46.37364000000000174850356415845453739166259765625,
        "lon": 142.698688299999986384136718697845935821533203125
    },
    "last_point": {
        "ts": "2026-10-07T21:42:52+00:00",
        "lat": 46.37382170000000058962541515938937664031982421875,
        "lon": 142.6990250000000060026650317013263702392578125
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 15:12 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 30m
  • Data Points: 31 AIS positions
  • Period: 2026-10-07T15:12:50+00:00 to 2026-10-07T21:42:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 390,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-10-07T15:12:50+00:00",
        "lat": 46.37364000000000174850356415845453739166259765625,
        "lon": 142.698688299999986384136718697845935821533203125
    },
    "last_point": {
        "ts": "2026-10-07T21:42:52+00:00",
        "lat": 46.37382170000000058962541515938937664031982421875,
        "lon": 142.6990250000000060026650317013263702392578125
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 15:12 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 98 meters
  • Data Points: 31 AIS positions
  • Centroid: 46.3730, 142.6986
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 98.099999999999994315658113919198513031005859375,
    "duration_minutes": 390,
    "points": 31,
    "centroid": {
        "lat": 46.37300231612902479128024424426257610321044921875,
        "lon": 142.6985515000000077634467743337154388427734375
    },
    "bbox": {
        "min_lat": 46.37251499999999992951416061259806156158447265625,
        "min_lon": 142.69823999999999841747921891510486602783203125,
        "max_lat": 46.37382170000000058962541515938937664031982421875,
        "max_lon": 142.6990250000000060026650317013263702392578125
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 15:12 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 98 meters
  • Data Points: 31 AIS positions
  • Centroid: 46.3730, 142.6986
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 98.099999999999994315658113919198513031005859375,
    "duration_minutes": 390,
    "points": 31,
    "centroid": {
        "lat": 46.37300231612902479128024424426257610321044921875,
        "lon": 142.6985515000000077634467743337154388427734375
    },
    "bbox": {
        "min_lat": 46.37251499999999992951416061259806156158447265625,
        "min_lon": 142.69823999999999841747921891510486602783203125,
        "max_lat": 46.37382170000000058962541515938937664031982421875,
        "max_lon": 142.6990250000000060026650317013263702392578125
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Sts🛰️✗ Prigorodnoye/Sakhalin LNG
Oct 7, 2026 14:12 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 11 meters
  • Average Distance: 20 meters
  • Duration: 6h 6m
  • Period: 2026-10-07T14:12:51+00:00 to 2026-10-07T20:18:52+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 11m, avg 20m) for 366 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
FactorScoreDetail
Distance Tightness25/25Min distance 11m, avg 20m
Duration25/25Duration 366 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-07T20:45:01.384284+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 10.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 19.89999999999999857891452847979962825775146484375,
    "distance_consistency_m": 3.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 366,
    "overlap_duration_s": 21961,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-07T14:12:51+00:00",
        "end": "2026-10-07T20:18:52+00:00"
    },
    "points_count": {
        "vessel_a": 33,
        "vessel_b": 33
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 366 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 11m, avg 20m) for 366 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": 46.37328140000000331610863213427364826202392578125,
            "lon": 142.698461600000001681110006757080554962158203125
        },
        "time_window": {
            "start_ts": "2026-10-07T14:12:51+00:00",
            "end_ts": "2026-10-07T20:18:52+00:00"
        },
        "searched_at": "2026-10-07T20:45:01.384284+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Sakhalin South Approach
Oct 7, 2026 14:12 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 11 meters
  • Average Distance: 20 meters
  • Duration: 6h 6m
  • Period: 2026-10-07T14:12:51+00:00 to 2026-10-07T20:18:52+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 11m, avg 20m) for 366 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
FactorScoreDetail
Distance Tightness25/25Min distance 11m, avg 20m
Duration25/25Duration 366 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-07T20:45:04.532346+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 10.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 19.89999999999999857891452847979962825775146484375,
    "distance_consistency_m": 3.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 366,
    "overlap_duration_s": 21961,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-07T14:12:51+00:00",
        "end": "2026-10-07T20:18:52+00:00"
    },
    "points_count": {
        "vessel_a": 33,
        "vessel_b": 33
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 366 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 11m, avg 20m) for 366 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": 46.37328140000000331610863213427364826202392578125,
            "lon": 142.698461600000001681110006757080554962158203125
        },
        "time_window": {
            "start_ts": "2026-10-07T14:12:51+00:00",
            "end_ts": "2026-10-07T20:18:52+00:00"
        },
        "searched_at": "2026-10-07T20:45:04.532346+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 14:03 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 30m
  • Data Points: 32 AIS positions
  • Period: 2026-10-07T14:39:52+00:00 to 2026-10-07T21:09:56+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 390.1000000000000227373675443232059478759765625,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-10-07T14:39:52+00:00",
        "lat": 46.37443999999999988403942552395164966583251953125,
        "lon": 142.698258299999992004813975654542446136474609375
    },
    "last_point": {
        "ts": "2026-10-07T21:09:56+00:00",
        "lat": 46.373598299999997607301338575780391693115234375,
        "lon": 142.69893830000000889413058757781982421875
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 14:03 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 30m
  • Data Points: 32 AIS positions
  • Period: 2026-10-07T14:39:52+00:00 to 2026-10-07T21:09:56+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 390.1000000000000227373675443232059478759765625,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-10-07T14:39:52+00:00",
        "lat": 46.37443999999999988403942552395164966583251953125,
        "lon": 142.698258299999992004813975654542446136474609375
    },
    "last_point": {
        "ts": "2026-10-07T21:09:56+00:00",
        "lat": 46.373598299999997607301338575780391693115234375,
        "lon": 142.69893830000000889413058757781982421875
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 14:03 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 152 meters
  • Data Points: 32 AIS positions
  • Centroid: 46.3731, 142.6985
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 151.80000000000001136868377216160297393798828125,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "points": 32,
    "centroid": {
        "lat": 46.3730843781250001711669028736650943756103515625,
        "lon": 142.698499890625015495970728807151317596435546875
    },
    "bbox": {
        "min_lat": 46.37251499999999992951416061259806156158447265625,
        "min_lon": 142.69823999999999841747921891510486602783203125,
        "max_lat": 46.37443999999999988403942552395164966583251953125,
        "max_lon": 142.69893830000000889413058757781982421875
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 14:03 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 152 meters
  • Data Points: 32 AIS positions
  • Centroid: 46.3731, 142.6985
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 151.80000000000001136868377216160297393798828125,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "points": 32,
    "centroid": {
        "lat": 46.3730843781250001711669028736650943756103515625,
        "lon": 142.698499890625015495970728807151317596435546875
    },
    "bbox": {
        "min_lat": 46.37251499999999992951416061259806156158447265625,
        "min_lon": 142.69823999999999841747921891510486602783203125,
        "max_lat": 46.37443999999999988403942552395164966583251953125,
        "max_lon": 142.69893830000000889413058757781982421875
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Sts Prigorodnoye/Sakhalin LNG
Oct 7, 2026 13:23 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 11 meters
  • Average Distance: 20 meters
  • Duration: 6 hours
  • Period: 2026-10-07T13:30:51+00:00 to 2026-10-07T19:30:53+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 11m, avg 20m) for 360 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye/Sakhalin LNG, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 11m, avg 20m
Duration25/25Duration 360 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 10.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 19.800000000000000710542735760100185871124267578125,
    "distance_consistency_m": 3.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 360,
    "overlap_duration_s": 21602,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-07T13:30:51+00:00",
        "end": "2026-10-07T19:30:53+00:00"
    },
    "points_count": {
        "vessel_a": 40,
        "vessel_b": 40
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 360 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 11m, avg 20m) for 360 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Sakhalin South Approach
Oct 7, 2026 13:23 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 11 meters
  • Average Distance: 20 meters
  • Duration: 6 hours
  • Period: 2026-10-07T13:30:51+00:00 to 2026-10-07T19:30:53+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 11m, avg 20m) for 360 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 11m, avg 20m
Duration25/25Duration 360 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 10.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 19.800000000000000710542735760100185871124267578125,
    "distance_consistency_m": 3.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 360,
    "overlap_duration_s": 21602,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-07T13:30:51+00:00",
        "end": "2026-10-07T19:30:53+00:00"
    },
    "points_count": {
        "vessel_a": 40,
        "vessel_b": 40
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 360 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 11m, avg 20m) for 360 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 13:00 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 36m
  • Data Points: 37 AIS positions
  • Period: 2026-10-07T13:42:51+00:00 to 2026-10-07T20:18:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 396,
    "points_in_zone": 37,
    "first_point": {
        "ts": "2026-10-07T13:42:51+00:00",
        "lat": 46.3745100000000007867129170335829257965087890625,
        "lon": 142.69817499999999199644662439823150634765625
    },
    "last_point": {
        "ts": "2026-10-07T20:18:52+00:00",
        "lat": 46.37348999999999676902007195167243480682373046875,
        "lon": 142.698769999999996116457623429596424102783203125
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 13:00 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 36m
  • Data Points: 37 AIS positions
  • Period: 2026-10-07T13:42:51+00:00 to 2026-10-07T20:18:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 396,
    "points_in_zone": 37,
    "first_point": {
        "ts": "2026-10-07T13:42:51+00:00",
        "lat": 46.3745100000000007867129170335829257965087890625,
        "lon": 142.69817499999999199644662439823150634765625
    },
    "last_point": {
        "ts": "2026-10-07T20:18:52+00:00",
        "lat": 46.37348999999999676902007195167243480682373046875,
        "lon": 142.698769999999996116457623429596424102783203125
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 13:00 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 150 meters
  • Data Points: 37 AIS positions
  • Centroid: 46.3734, 142.6984
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 150,
    "duration_minutes": 396,
    "points": 37,
    "centroid": {
        "lat": 46.373353921621628614957444369792938232421875,
        "lon": 142.698402875675611767292139120399951934814453125
    },
    "bbox": {
        "min_lat": 46.37251499999999992951416061259806156158447265625,
        "min_lon": 142.6980432999999948151526041328907012939453125,
        "max_lat": 46.3746799999999979036147124134004116058349609375,
        "max_lon": 142.698769999999996116457623429596424102783203125
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 13:00 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 150 meters
  • Data Points: 37 AIS positions
  • Centroid: 46.3734, 142.6984
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 150,
    "duration_minutes": 396,
    "points": 37,
    "centroid": {
        "lat": 46.373353921621628614957444369792938232421875,
        "lon": 142.698402875675611767292139120399951934814453125
    },
    "bbox": {
        "min_lat": 46.37251499999999992951416061259806156158447265625,
        "min_lon": 142.6980432999999948151526041328907012939453125,
        "max_lat": 46.3746799999999979036147124134004116058349609375,
        "max_lon": 142.698769999999996116457623429596424102783203125
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Sts Prigorodnoye/Sakhalin LNG
Oct 7, 2026 12:11 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 11 meters
  • Average Distance: 20 meters
  • Duration: 6h 24m
  • Period: 2026-10-07T12:33:48+00:00 to 2026-10-07T18:57:56+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 11m, avg 20m) for 384 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye/Sakhalin LNG, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 11m, avg 20m
Duration25/25Duration 384 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 10.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 20,
    "distance_consistency_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 384.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23048,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-07T12:33:48+00:00",
        "end": "2026-10-07T18:57:56+00:00"
    },
    "points_count": {
        "vessel_a": 41,
        "vessel_b": 41
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 384 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 11m, avg 20m) for 384 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Sakhalin South Approach
Oct 7, 2026 12:11 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 11 meters
  • Average Distance: 20 meters
  • Duration: 6h 24m
  • Period: 2026-10-07T12:33:48+00:00 to 2026-10-07T18:57:56+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 11m, avg 20m) for 384 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 11m, avg 20m
Duration25/25Duration 384 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 10.699999999999999289457264239899814128875732421875,
    "avg_distance_m": 20,
    "distance_consistency_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 384.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23048,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-07T12:33:48+00:00",
        "end": "2026-10-07T18:57:56+00:00"
    },
    "points_count": {
        "vessel_a": 41,
        "vessel_b": 41
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 384 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 11m, avg 20m) for 384 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Sakhalin South Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 12:03 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 24m
  • Data Points: 41 AIS positions
  • Period: 2026-10-07T12:57:50+00:00 to 2026-10-07T19:21:55+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 384.1000000000000227373675443232059478759765625,
    "points_in_zone": 41,
    "first_point": {
        "ts": "2026-10-07T12:57:50+00:00",
        "lat": 46.37475830000000343034116667695343494415283203125,
        "lon": 142.697869999999994661266100592911243438720703125
    },
    "last_point": {
        "ts": "2026-10-07T19:21:55+00:00",
        "lat": 46.37272999999999711917553213424980640411376953125,
        "lon": 142.698344999999989113348419778048992156982421875
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 12:03 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 24m
  • Data Points: 41 AIS positions
  • Period: 2026-10-07T12:57:50+00:00 to 2026-10-07T19:21:55+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 384.1000000000000227373675443232059478759765625,
    "points_in_zone": 41,
    "first_point": {
        "ts": "2026-10-07T12:57:50+00:00",
        "lat": 46.37475830000000343034116667695343494415283203125,
        "lon": 142.697869999999994661266100592911243438720703125
    },
    "last_point": {
        "ts": "2026-10-07T19:21:55+00:00",
        "lat": 46.37272999999999711917553213424980640411376953125,
        "lon": 142.698344999999989113348419778048992156982421875
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 12:03 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 140 meters
  • Data Points: 41 AIS positions
  • Centroid: 46.3736, 142.6983
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 140.19999999999998863131622783839702606201171875,
    "duration_minutes": 384.1000000000000227373675443232059478759765625,
    "points": 41,
    "centroid": {
        "lat": 46.37356089512194756707685883156955242156982421875,
        "lon": 142.69832909999996672922861762344837188720703125
    },
    "bbox": {
        "min_lat": 46.37251499999999992951416061259806156158447265625,
        "min_lon": 142.6978467000000136977178044617176055908203125,
        "max_lat": 46.3747766999999981862856657244265079498291015625,
        "max_lon": 142.6987116999999898325768299400806427001953125
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 12:03 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 140 meters
  • Data Points: 41 AIS positions
  • Centroid: 46.3736, 142.6983
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 140.19999999999998863131622783839702606201171875,
    "duration_minutes": 384.1000000000000227373675443232059478759765625,
    "points": 41,
    "centroid": {
        "lat": 46.37356089512194756707685883156955242156982421875,
        "lon": 142.69832909999996672922861762344837188720703125
    },
    "bbox": {
        "min_lat": 46.37251499999999992951416061259806156158447265625,
        "min_lon": 142.6978467000000136977178044617176055908203125,
        "max_lat": 46.3747766999999981862856657244265079498291015625,
        "max_lon": 142.6987116999999898325768299400806427001953125
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Sts Prigorodnoye/Sakhalin LNG
Oct 7, 2026 11:58 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 10 meters
  • Average Distance: 20 meters
  • Duration: 6h 24m
  • Period: 2026-10-07T11:09:50+00:00 to 2026-10-07T17:33:55+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 20m) for 384 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
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 20m
Duration25/25Duration 384 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 10.199999999999999289457264239899814128875732421875,
    "avg_distance_m": 20.300000000000000710542735760100185871124267578125,
    "distance_consistency_m": 5.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 384.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23045,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T11:09:50+00:00",
        "end": "2026-10-07T17:33:55+00:00"
    },
    "points_count": {
        "vessel_a": 43,
        "vessel_b": 43
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 384 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 20m) for 384 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."
    }
}
Methodology: 2026.01.18
Sts Sakhalin South Approach
Oct 7, 2026 11:58 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 10 meters
  • Average Distance: 20 meters
  • Duration: 6h 24m
  • Period: 2026-10-07T11:09:50+00:00 to 2026-10-07T17:33:55+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 20m) for 384 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
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 20m
Duration25/25Duration 384 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 10.199999999999999289457264239899814128875732421875,
    "avg_distance_m": 20.300000000000000710542735760100185871124267578125,
    "distance_consistency_m": 5.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 384.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23045,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T11:09:50+00:00",
        "end": "2026-10-07T17:33:55+00:00"
    },
    "points_count": {
        "vessel_a": 43,
        "vessel_b": 43
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 384 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 20m) for 384 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."
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 11:06 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 30m
  • Data Points: 45 AIS positions
  • Period: 2026-10-07T11:36:52+00:00 to 2026-10-07T18:06:54+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 390,
    "points_in_zone": 45,
    "first_point": {
        "ts": "2026-10-07T11:36:52+00:00",
        "lat": 46.3741933000000017273123376071453094482421875,
        "lon": 142.695573300000006611298886127769947052001953125
    },
    "last_point": {
        "ts": "2026-10-07T18:06:54+00:00",
        "lat": 46.372673300000002427623257972300052642822265625,
        "lon": 142.698363300000011122392606921494007110595703125
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 11:06 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 30m
  • Data Points: 45 AIS positions
  • Period: 2026-10-07T11:36:52+00:00 to 2026-10-07T18:06:54+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 390,
    "points_in_zone": 45,
    "first_point": {
        "ts": "2026-10-07T11:36:52+00:00",
        "lat": 46.3741933000000017273123376071453094482421875,
        "lon": 142.695573300000006611298886127769947052001953125
    },
    "last_point": {
        "ts": "2026-10-07T18:06:54+00:00",
        "lat": 46.372673300000002427623257972300052642822265625,
        "lon": 142.698363300000011122392606921494007110595703125
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 11:06 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 195 meters
  • Data Points: 45 AIS positions
  • Centroid: 46.3740, 142.6981
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 195,
    "duration_minutes": 390,
    "points": 45,
    "centroid": {
        "lat": 46.3740093311111110097044729627668857574462890625,
        "lon": 142.698093402222212944252532906830310821533203125
    },
    "bbox": {
        "min_lat": 46.372673300000002427623257972300052642822265625,
        "min_lon": 142.695573300000006611298886127769947052001953125,
        "max_lat": 46.3747766999999981862856657244265079498291015625,
        "max_lon": 142.6987116999999898325768299400806427001953125
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 11:06 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 195 meters
  • Data Points: 45 AIS positions
  • Centroid: 46.3740, 142.6981
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 195,
    "duration_minutes": 390,
    "points": 45,
    "centroid": {
        "lat": 46.3740093311111110097044729627668857574462890625,
        "lon": 142.698093402222212944252532906830310821533203125
    },
    "bbox": {
        "min_lat": 46.372673300000002427623257972300052642822265625,
        "min_lon": 142.695573300000006611298886127769947052001953125,
        "max_lat": 46.3747766999999981862856657244265079498291015625,
        "max_lon": 142.6987116999999898325768299400806427001953125
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Sts Prigorodnoye/Sakhalin LNG
Oct 7, 2026 10:12 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 10 meters
  • Average Distance: 20 meters
  • Duration: 6h 15m
  • Period: 2026-10-07T10:39:50+00:00 to 2026-10-07T16:54:51+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 20m) for 375 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
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 20m
Duration25/25Duration 375 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 10.199999999999999289457264239899814128875732421875,
    "avg_distance_m": 20.300000000000000710542735760100185871124267578125,
    "distance_consistency_m": 5.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 375,
    "overlap_duration_s": 22501,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T10:39:50+00:00",
        "end": "2026-10-07T16:54:51+00:00"
    },
    "points_count": {
        "vessel_a": 45,
        "vessel_b": 45
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 375 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 20m) for 375 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."
    }
}
Methodology: 2026.01.18
Sts Sakhalin South Approach
Oct 7, 2026 10:12 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 10 meters
  • Average Distance: 20 meters
  • Duration: 6h 15m
  • Period: 2026-10-07T10:39:50+00:00 to 2026-10-07T16:54:51+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 20m) for 375 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
FactorScoreDetail
Distance Tightness25/25Min distance 10m, avg 20m
Duration25/25Duration 375 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 10.199999999999999289457264239899814128875732421875,
    "avg_distance_m": 20.300000000000000710542735760100185871124267578125,
    "distance_consistency_m": 5.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 375,
    "overlap_duration_s": 22501,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T10:39:50+00:00",
        "end": "2026-10-07T16:54:51+00:00"
    },
    "points_count": {
        "vessel_a": 45,
        "vessel_b": 45
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 10m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 375 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 10m, avg 20m) for 375 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."
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 10:03 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 30m
  • Data Points: 45 AIS positions
  • Period: 2026-10-07T10:51:49+00:00 to 2026-10-07T17:21:55+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 390.1000000000000227373675443232059478759765625,
    "points_in_zone": 45,
    "first_point": {
        "ts": "2026-10-07T10:51:49+00:00",
        "lat": 46.3733466999999990321157383732497692108154296875,
        "lon": 142.694941699999986894908943213522434234619140625
    },
    "last_point": {
        "ts": "2026-10-07T17:21:55+00:00",
        "lat": 46.373046700000003284003469161689281463623046875,
        "lon": 142.69860330000000203654053620994091033935546875
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 10:03 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 30m
  • Data Points: 45 AIS positions
  • Period: 2026-10-07T10:51:49+00:00 to 2026-10-07T17:21:55+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 390.1000000000000227373675443232059478759765625,
    "points_in_zone": 45,
    "first_point": {
        "ts": "2026-10-07T10:51:49+00:00",
        "lat": 46.3733466999999990321157383732497692108154296875,
        "lon": 142.694941699999986894908943213522434234619140625
    },
    "last_point": {
        "ts": "2026-10-07T17:21:55+00:00",
        "lat": 46.373046700000003284003469161689281463623046875,
        "lon": 142.69860330000000203654053620994091033935546875
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 10:03 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 220 meters
  • Data Points: 45 AIS positions
  • Centroid: 46.3741, 142.6976
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 220.30000000000001136868377216160297393798828125,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "points": 45,
    "centroid": {
        "lat": 46.37412177333333573869822430424392223358154296875,
        "lon": 142.69756225777774716334533877670764923095703125
    },
    "bbox": {
        "min_lat": 46.37295999999999907004166743718087673187255859375,
        "min_lon": 142.6948849999999993087840266525745391845703125,
        "max_lat": 46.3747766999999981862856657244265079498291015625,
        "max_lon": 142.6987116999999898325768299400806427001953125
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 10:03 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 220 meters
  • Data Points: 45 AIS positions
  • Centroid: 46.3741, 142.6976
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 220.30000000000001136868377216160297393798828125,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "points": 45,
    "centroid": {
        "lat": 46.37412177333333573869822430424392223358154296875,
        "lon": 142.69756225777774716334533877670764923095703125
    },
    "bbox": {
        "min_lat": 46.37295999999999907004166743718087673187255859375,
        "min_lon": 142.6948849999999993087840266525745391845703125,
        "max_lat": 46.3747766999999981862856657244265079498291015625,
        "max_lon": 142.6987116999999898325768299400806427001953125
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Sts Prigorodnoye/Sakhalin LNG
Oct 7, 2026 09:54 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 4 meters
  • Average Distance: 20 meters
  • Duration: 6h 9m
  • Period: 2026-10-07T09:54:51+00:00 to 2026-10-07T16:03:54+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 4m, avg 20m) for 369 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
FactorScoreDetail
Distance Tightness25/25Min distance 4m, avg 20m
Duration25/25Duration 369 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 4.4000000000000003552713678800500929355621337890625,
    "avg_distance_m": 20.199999999999999289457264239899814128875732421875,
    "distance_consistency_m": 5.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 369.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 22143,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T09:54:51+00:00",
        "end": "2026-10-07T16:03:54+00:00"
    },
    "points_count": {
        "vessel_a": 44,
        "vessel_b": 44
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 4m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 369 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Prigorodnoye\/Sakhalin LNG"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 4m, avg 20m) for 369 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."
    }
}
Methodology: 2026.01.18
Sts Sakhalin South Approach
Oct 7, 2026 09:54 UTC 95/100 ▼
Vessel A: IMO 9917402 (GLORISEA) HONG KONG
Vessel B: IMO 9004310 (ORIS) TOGO
  • Minimum Distance: 4 meters
  • Average Distance: 20 meters
  • Duration: 6h 9m
  • Period: 2026-10-07T09:54:51+00:00 to 2026-10-07T16:03:54+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 4m, avg 20m) for 369 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
FactorScoreDetail
Distance Tightness25/25Min distance 4m, avg 20m
Duration25/25Duration 369 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "vessel_b": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "min_distance_m": 4.4000000000000003552713678800500929355621337890625,
    "avg_distance_m": 20.199999999999999289457264239899814128875732421875,
    "distance_consistency_m": 5.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 369.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 22143,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-10-07T09:54:51+00:00",
        "end": "2026-10-07T16:03:54+00:00"
    },
    "points_count": {
        "vessel_a": 44,
        "vessel_b": 44
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 4m, avg 20m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 369 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Sakhalin South Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (GLORISEA and ORIS) maintained close proximity (min 4m, avg 20m) for 369 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."
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 09:00 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 18m
  • Data Points: 45 AIS positions
  • Period: 2026-10-07T09:54:51+00:00 to 2026-10-07T16:12:53+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 378,
    "points_in_zone": 45,
    "first_point": {
        "ts": "2026-10-07T09:54:51+00:00",
        "lat": 46.37279500000000354020812665112316608428955078125,
        "lon": 142.694883299999986547845765016973018646240234375
    },
    "last_point": {
        "ts": "2026-10-07T16:12:53+00:00",
        "lat": 46.373168300000003227978595532476902008056640625,
        "lon": 142.69869330000000218205968849360942840576171875
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 09:00 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 18m
  • Data Points: 45 AIS positions
  • Period: 2026-10-07T09:54:51+00:00 to 2026-10-07T16:12:53+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 378,
    "points_in_zone": 45,
    "first_point": {
        "ts": "2026-10-07T09:54:51+00:00",
        "lat": 46.37279500000000354020812665112316608428955078125,
        "lon": 142.694883299999986547845765016973018646240234375
    },
    "last_point": {
        "ts": "2026-10-07T16:12:53+00:00",
        "lat": 46.373168300000003227978595532476902008056640625,
        "lon": 142.69869330000000218205968849360942840576171875
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 09:00 UTC 75.0% ▼
  • Duration: 6h 18m
  • Radius: 229 meters
  • Data Points: 45 AIS positions
  • Centroid: 46.3741, 142.6972
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 229.099999999999994315658113919198513031005859375,
    "duration_minutes": 378,
    "points": 45,
    "centroid": {
        "lat": 46.374116884444447350688278675079345703125,
        "lon": 142.6971671866666611094842664897441864013671875
    },
    "bbox": {
        "min_lat": 46.37279500000000354020812665112316608428955078125,
        "min_lon": 142.694873300000011795418686233460903167724609375,
        "max_lat": 46.3747766999999981862856657244265079498291015625,
        "max_lon": 142.6987116999999898325768299400806427001953125
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 09:00 UTC 75.0% ▼
  • Duration: 6h 18m
  • Radius: 229 meters
  • Data Points: 45 AIS positions
  • Centroid: 46.3741, 142.6972
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 229.099999999999994315658113919198513031005859375,
    "duration_minutes": 378,
    "points": 45,
    "centroid": {
        "lat": 46.374116884444447350688278675079345703125,
        "lon": 142.6971671866666611094842664897441864013671875
    },
    "bbox": {
        "min_lat": 46.37279500000000354020812665112316608428955078125,
        "min_lon": 142.694873300000011795418686233460903167724609375,
        "max_lat": 46.3747766999999981862856657244265079498291015625,
        "max_lon": 142.6987116999999898325768299400806427001953125
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Sts Prigorodnoye/Sakhalin LNG
Oct 7, 2026 08:39 UTC 95/100 ▼
Vessel A: IMO 9004310 (ORIS) TOGO
Vessel B: IMO 9917402 (GLORISEA) HONG KONG
  • Minimum Distance: 8 meters
  • Average Distance: 23 meters
  • Duration: 3h 7m
  • Period: 2026-10-07T08:34:57+00:00 to 2026-10-07T11:42:49+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Prigorodnoye/Sakhalin LNG

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (ORIS and GLORISEA) maintained close proximity (min 8m, avg 23m) for 188 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 Prigorodnoye/Sakhalin LNG, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 8m, avg 23m
Duration25/25Duration 188 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±12m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "vessel_b": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "min_distance_m": 8.4000000000000003552713678800500929355621337890625,
    "avg_distance_m": 22.699999999999999289457264239899814128875732421875,
    "distance_consistency_m": 11.5,
    "duration_minutes": 187.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 11272,
    "speed_a_avg": 0.179999999999999993338661852249060757458209991455078125,
    "speed_a_std": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_b_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_std": 0.13000000000000000444089209850062616169452667236328125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.179999999999999993338661852249060757458209991455078125,
            "max_sog": 1.399999999999999911182158029987476766109466552734375
        },
        "vessel_b": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-10-07T08:34:57+00:00",
        "end": "2026-10-07T11:42:49+00:00"
    },
    "points_count": {
        "vessel_a": 35,
        "vessel_b": 35
    },
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 8m, avg 23m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 188 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b112m"
            },
            "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 (ORIS and GLORISEA) maintained close proximity (min 8m, avg 23m) for 188 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 Prigorodnoye\/Sakhalin LNG, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Sakhalin South Approach
Oct 7, 2026 08:39 UTC 95/100 ▼
Vessel A: IMO 9004310 (ORIS) TOGO
Vessel B: IMO 9917402 (GLORISEA) HONG KONG
  • Minimum Distance: 8 meters
  • Average Distance: 23 meters
  • Duration: 3h 7m
  • Period: 2026-10-07T08:34:57+00:00 to 2026-10-07T11:42:49+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Sakhalin South Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (ORIS and GLORISEA) maintained close proximity (min 8m, avg 23m) for 188 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 Sakhalin South Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 8m, avg 23m
Duration25/25Duration 188 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±12m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 671388100,
        "imo": 9004310,
        "name": "ORIS",
        "flag": "TOGO"
    },
    "vessel_b": {
        "mmsi": 477664300,
        "imo": 9917402,
        "name": "GLORISEA",
        "flag": "HONG KONG"
    },
    "min_distance_m": 8.4000000000000003552713678800500929355621337890625,
    "avg_distance_m": 22.699999999999999289457264239899814128875732421875,
    "distance_consistency_m": 11.5,
    "duration_minutes": 187.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 11272,
    "speed_a_avg": 0.179999999999999993338661852249060757458209991455078125,
    "speed_a_std": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_b_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_std": 0.13000000000000000444089209850062616169452667236328125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.179999999999999993338661852249060757458209991455078125,
            "max_sog": 1.399999999999999911182158029987476766109466552734375
        },
        "vessel_b": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-10-07T08:34:57+00:00",
        "end": "2026-10-07T11:42:49+00:00"
    },
    "points_count": {
        "vessel_a": 35,
        "vessel_b": 35
    },
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 8m, avg 23m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 188 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b112m"
            },
            "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 (ORIS and GLORISEA) maintained close proximity (min 8m, avg 23m) for 188 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 Sakhalin South Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 08:09 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 27m
  • Data Points: 50 AIS positions
  • Period: 2026-10-07T08:45:51+00:00 to 2026-10-07T15:12:50+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 387,
    "points_in_zone": 50,
    "first_point": {
        "ts": "2026-10-07T08:45:51+00:00",
        "lat": 46.3721232999999983803718350827693939208984375,
        "lon": 142.69531829999999672509147785604000091552734375
    },
    "last_point": {
        "ts": "2026-10-07T15:12:50+00:00",
        "lat": 46.37364000000000174850356415845453739166259765625,
        "lon": 142.698688299999986384136718697845935821533203125
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 08:09 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 27m
  • Data Points: 50 AIS positions
  • Period: 2026-10-07T08:45:51+00:00 to 2026-10-07T15:12:50+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 387,
    "points_in_zone": 50,
    "first_point": {
        "ts": "2026-10-07T08:45:51+00:00",
        "lat": 46.3721232999999983803718350827693939208984375,
        "lon": 142.69531829999999672509147785604000091552734375
    },
    "last_point": {
        "ts": "2026-10-07T15:12:50+00:00",
        "lat": 46.37364000000000174850356415845453739166259765625,
        "lon": 142.698688299999986384136718697845935821533203125
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 08:09 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 264 meters
  • Data Points: 50 AIS positions
  • Centroid: 46.3739, 142.6967
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 263.5,
    "duration_minutes": 387,
    "points": 50,
    "centroid": {
        "lat": 46.3738794640000122626588563434779644012451171875,
        "lon": 142.696711401999976942533976398408412933349609375
    },
    "bbox": {
        "min_lat": 46.371863300000001117950887419283390045166015625,
        "min_lon": 142.69467670000000225627445615828037261962890625,
        "max_lat": 46.3747766999999981862856657244265079498291015625,
        "max_lon": 142.698688299999986384136718697845935821533203125
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 08:09 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 264 meters
  • Data Points: 50 AIS positions
  • Centroid: 46.3739, 142.6967
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 263.5,
    "duration_minutes": 387,
    "points": 50,
    "centroid": {
        "lat": 46.3738794640000122626588563434779644012451171875,
        "lon": 142.696711401999976942533976398408412933349609375
    },
    "bbox": {
        "min_lat": 46.371863300000001117950887419283390045166015625,
        "min_lon": 142.69467670000000225627445615828037261962890625,
        "max_lat": 46.3747766999999981862856657244265079498291015625,
        "max_lon": 142.698688299999986384136718697845935821533203125
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 07:00 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 29m
  • Data Points: 47 AIS positions
  • Period: 2026-10-07T07:42:54+00:00 to 2026-10-07T14:12:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 389.8999999999999772626324556767940521240234375,
    "points_in_zone": 47,
    "first_point": {
        "ts": "2026-10-07T07:42:54+00:00",
        "lat": 46.3718199999999995952748577110469341278076171875,
        "lon": 142.6959650000000010550138540565967559814453125
    },
    "last_point": {
        "ts": "2026-10-07T14:12:51+00:00",
        "lat": 46.3746383000000008678398444317281246185302734375,
        "lon": 142.698131700000004684625309891998767852783203125
    }
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 07:00 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 29m
  • Data Points: 47 AIS positions
  • Period: 2026-10-07T07:42:54+00:00 to 2026-10-07T14:12:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 389.8999999999999772626324556767940521240234375,
    "points_in_zone": 47,
    "first_point": {
        "ts": "2026-10-07T07:42:54+00:00",
        "lat": 46.3718199999999995952748577110469341278076171875,
        "lon": 142.6959650000000010550138540565967559814453125
    },
    "last_point": {
        "ts": "2026-10-07T14:12:51+00:00",
        "lat": 46.3746383000000008678398444317281246185302734375,
        "lon": 142.698131700000004684625309891998767852783203125
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 07:00 UTC 75.0% ▼
  • Duration: 6h 29m
  • Radius: 235 meters
  • Data Points: 47 AIS positions
  • Centroid: 46.3737, 142.6964
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 234.900000000000005684341886080801486968994140625,
    "duration_minutes": 389.8999999999999772626324556767940521240234375,
    "points": 47,
    "centroid": {
        "lat": 46.3736910255319116913597099483013153076171875,
        "lon": 142.696445359574454414541833102703094482421875
    },
    "bbox": {
        "min_lat": 46.3718199999999995952748577110469341278076171875,
        "min_lon": 142.69467670000000225627445615828037261962890625,
        "max_lat": 46.3747766999999981862856657244265079498291015625,
        "max_lon": 142.69817499999999199644662439823150634765625
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 07:00 UTC 75.0% ▼
  • Duration: 6h 29m
  • Radius: 235 meters
  • Data Points: 47 AIS positions
  • Centroid: 46.3737, 142.6964
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 234.900000000000005684341886080801486968994140625,
    "duration_minutes": 389.8999999999999772626324556767940521240234375,
    "points": 47,
    "centroid": {
        "lat": 46.3736910255319116913597099483013153076171875,
        "lon": 142.696445359574454414541833102703094482421875
    },
    "bbox": {
        "min_lat": 46.3718199999999995952748577110469341278076171875,
        "min_lon": 142.69467670000000225627445615828037261962890625,
        "max_lat": 46.3747766999999981862856657244265079498291015625,
        "max_lon": 142.69817499999999199644662439823150634765625
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 06:06 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 27m
  • Data Points: 53 AIS positions
  • Period: 2026-10-07T06:33:49+00:00 to 2026-10-07T13:00:47+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 387,
    "points_in_zone": 53,
    "first_point": {
        "ts": "2026-10-07T06:33:49+00:00",
        "lat": 46.371769999999997935447026975452899932861328125,
        "lon": 142.695863300000013396129361353814601898193359375
    },
    "last_point": {
        "ts": "2026-10-07T13:00:47+00:00",
        "lat": 46.3747766999999981862856657244265079498291015625,
        "lon": 142.6978467000000136977178044617176055908203125
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 06:06 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 27m
  • Data Points: 53 AIS positions
  • Period: 2026-10-07T06:33:49+00:00 to 2026-10-07T13:00:47+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 387,
    "points_in_zone": 53,
    "first_point": {
        "ts": "2026-10-07T06:33:49+00:00",
        "lat": 46.371769999999997935447026975452899932861328125,
        "lon": 142.695863300000013396129361353814601898193359375
    },
    "last_point": {
        "ts": "2026-10-07T13:00:47+00:00",
        "lat": 46.3747766999999981862856657244265079498291015625,
        "lon": 142.6978467000000136977178044617176055908203125
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 06:06 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 244 meters
  • Data Points: 53 AIS positions
  • Centroid: 46.3730, 142.6960
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 243.80000000000001136868377216160297393798828125,
    "duration_minutes": 387,
    "points": 53,
    "centroid": {
        "lat": 46.3729865716981066725566051900386810302734375,
        "lon": 142.696015666037737901206128299236297607421875
    },
    "bbox": {
        "min_lat": 46.3717182999999977255356498062610626220703125,
        "min_lon": 142.69467670000000225627445615828037261962890625,
        "max_lat": 46.3747766999999981862856657244265079498291015625,
        "max_lon": 142.698021699999998190833139233291149139404296875
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 06:06 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 244 meters
  • Data Points: 53 AIS positions
  • Centroid: 46.3730, 142.6960
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 243.80000000000001136868377216160297393798828125,
    "duration_minutes": 387,
    "points": 53,
    "centroid": {
        "lat": 46.3729865716981066725566051900386810302734375,
        "lon": 142.696015666037737901206128299236297607421875
    },
    "bbox": {
        "min_lat": 46.3717182999999977255356498062610626220703125,
        "min_lon": 142.69467670000000225627445615828037261962890625,
        "max_lat": 46.3747766999999981862856657244265079498291015625,
        "max_lon": 142.698021699999998190833139233291149139404296875
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 05:09 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 33m
  • Data Points: 51 AIS positions
  • Period: 2026-10-07T05:51:49+00:00 to 2026-10-07T12:24:53+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 393.1000000000000227373675443232059478759765625,
    "points_in_zone": 51,
    "first_point": {
        "ts": "2026-10-07T05:51:49+00:00",
        "lat": 46.37173829999999696838131058029830455780029296875,
        "lon": 142.69580999999999448846210725605487823486328125
    },
    "last_point": {
        "ts": "2026-10-07T12:24:53+00:00",
        "lat": 46.3744999999999976125764078460633754730224609375,
        "lon": 142.69779829999998810308170504868030548095703125
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 05:09 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 33m
  • Data Points: 51 AIS positions
  • Period: 2026-10-07T05:51:49+00:00 to 2026-10-07T12:24:53+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 393.1000000000000227373675443232059478759765625,
    "points_in_zone": 51,
    "first_point": {
        "ts": "2026-10-07T05:51:49+00:00",
        "lat": 46.37173829999999696838131058029830455780029296875,
        "lon": 142.69580999999999448846210725605487823486328125
    },
    "last_point": {
        "ts": "2026-10-07T12:24:53+00:00",
        "lat": 46.3744999999999976125764078460633754730224609375,
        "lon": 142.69779829999998810308170504868030548095703125
    }
}
Methodology: 2026.01.18
Loiter Prigorodnoye/Sakhalin LNG
Oct 7, 2026 05:09 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 251 meters
  • Data Points: 51 AIS positions
  • Centroid: 46.3727, 142.6958
  • Zone: Prigorodnoye/Sakhalin LNG
Show Raw Evidence JSON
{
    "radius_m": 251.30000000000001136868377216160297393798828125,
    "duration_minutes": 393.1000000000000227373675443232059478759765625,
    "points": 51,
    "centroid": {
        "lat": 46.3727490843137246656624483875930309295654296875,
        "lon": 142.69581892549018675708794035017490386962890625
    },
    "bbox": {
        "min_lat": 46.3717182999999977255356498062610626220703125,
        "min_lon": 142.69467670000000225627445615828037261962890625,
        "max_lat": 46.3746416999999979680069372989237308502197265625,
        "max_lon": 142.69791670000000749496393837034702301025390625
    },
    "zone_id": "russia_prigorodnoye"
}
Methodology: 2026.01.18
Loiter Sakhalin South Approach
Oct 7, 2026 05:09 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 251 meters
  • Data Points: 51 AIS positions
  • Centroid: 46.3727, 142.6958
  • Zone: Sakhalin South Approach
Show Raw Evidence JSON
{
    "radius_m": 251.30000000000001136868377216160297393798828125,
    "duration_minutes": 393.1000000000000227373675443232059478759765625,
    "points": 51,
    "centroid": {
        "lat": 46.3727490843137246656624483875930309295654296875,
        "lon": 142.69581892549018675708794035017490386962890625
    },
    "bbox": {
        "min_lat": 46.3717182999999977255356498062610626220703125,
        "min_lon": 142.69467670000000225627445615828037261962890625,
        "max_lat": 46.3746416999999979680069372989237308502197265625,
        "max_lon": 142.69791670000000749496393837034702301025390625
    },
    "zone_id": "russia_sakhalin_south"
}
Methodology: 2026.01.18
Zone Dwell Prigorodnoye/Sakhalin LNG
Oct 7, 2026 04:12 UTC 80.0% ▼
  • Zone: Prigorodnoye/Sakhalin LNG
  • Duration: 6h 36m
  • Data Points: 49 AIS positions
  • Period: 2026-10-07T04:51:46+00:00 to 2026-10-07T11:27:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_prigorodnoye",
    "zone_name": "Prigorodnoye\/Sakhalin LNG",
    "dwell_minutes": 396,
    "points_in_zone": 49,
    "first_point": {
        "ts": "2026-10-07T04:51:46+00:00",
        "lat": 46.37171330000000324389475281350314617156982421875,
        "lon": 142.696143299999988585113896988332271575927734375
    },
    "last_point": {
        "ts": "2026-10-07T11:27:48+00:00",
        "lat": 46.3738282999999995581674738787114620208740234375,
        "lon": 142.69535500000000638465280644595623016357421875
    }
}
Methodology: 2026.01.18
Zone Dwell Sakhalin South Approach
Oct 7, 2026 04:12 UTC 80.0% ▼
  • Zone: Sakhalin South Approach
  • Duration: 6h 36m
  • Data Points: 49 AIS positions
  • Period: 2026-10-07T04:51:46+00:00 to 2026-10-07T11:27:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_sakhalin_south",
    "zone_name": "Sakhalin South Approach",
    "dwell_minutes": 396,
    "points_in_zone": 49,
    "first_point": {
        "ts": "2026-10-07T04:51:46+00:00",
        "lat": 46.37171330000000324389475281350314617156982421875,
        "lon": 142.696143299999988585113896988332271575927734375
    },
    "last_point": {
        "ts": "2026-10-07T11:27:48+00:00",
        "lat": 46.3738282999999995581674738787114620208740234375,
        "lon": 142.69535500000000638465280644595623016357421875
    }
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Oct 8 00:05 46.2626 142.7311 11.4 kn 176.6° Prigorodnoye/Sakhalin LNG
Oct 7 23:57 46.2867 142.7273 11.1 kn 166.9° Prigorodnoye/Sakhalin LNG
Oct 7 23:56 46.2897 142.7262 11.1 kn 167.3° Prigorodnoye/Sakhalin LNG
Oct 7 23:55 46.2927 142.7252 11.1 kn 166.4° Prigorodnoye/Sakhalin LNG
Oct 7 23:53 46.2987 142.7232 11.2 kn 166.4° Prigorodnoye/Sakhalin LNG
Oct 7 23:51 46.3060 142.7208 11.4 kn 166.8° Prigorodnoye/Sakhalin LNG
Oct 7 23:50 46.3091 142.7197 11.5 kn 167.1° Prigorodnoye/Sakhalin LNG
Oct 7 23:47 46.3185 142.7167 11.7 kn 167.7° Prigorodnoye/Sakhalin LNG
Oct 7 23:46 46.3227 142.7154 11.5 kn 167.6° Prigorodnoye/Sakhalin LNG
Oct 7 23:45 46.3259 142.7144 11.5 kn 167.8° Prigorodnoye/Sakhalin LNG
Oct 7 23:43 46.3321 142.7124 11.3 kn 167.8° Prigorodnoye/Sakhalin LNG
Oct 7 23:41 46.3367 142.7109 11.1 kn 167.1° Prigorodnoye/Sakhalin LNG
Oct 7 23:40 46.3392 142.7101 11.2 kn 167.1° Prigorodnoye/Sakhalin LNG
Oct 7 23:38 46.3467 142.7076 11.0 kn 167.6° Prigorodnoye/Sakhalin LNG
Oct 7 23:37 46.3497 142.7067 10.8 kn 166.8° Prigorodnoye/Sakhalin LNG
Oct 7 23:35 46.3550 142.7049 10.4 kn 167.2° Prigorodnoye/Sakhalin LNG
Oct 7 23:30 46.3680 142.7006 7.5 kn 167.3° Prigorodnoye/Sakhalin LNG
Oct 7 23:26 46.3740 142.6984 1.0 kn 128.1° Prigorodnoye/Sakhalin LNG
Oct 7 23:22 46.3744 142.6966 1.1 kn 103.6° Prigorodnoye/Sakhalin LNG
Oct 7 23:18 46.3746 142.6953 0.8 kn 94.3° 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.