BUKWANG

IMO 9181352

Vessel information

Vessel Name BUKWANG
IMO Number 9181352
MMSI 440191310
Vessel Type Tanker
Flag 🏳️ REPUBLIC OF KOREA
Call Sign 190008
Length 64 m
Beam 10 m

Detected Events (48)

Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 19, 2026 06:12 UTC 80/100 ▼
Vessel A: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
Vessel B: PHOENIX (PHOENIX) RUSSIA
  • Minimum Distance: 59 meters
  • Average Distance: 63 meters
  • Duration: 56 minutes
  • Period: 2026-07-19T06:12:41+00:00 to 2026-07-19T07:09:22+00:00
  • Vessel A Avg Speed: 0.3 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (BUKWANG and PHOENIX) maintained close proximity (min 59m, avg 63m) for 57 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 59m, avg 63m
Duration10/25Duration 57 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-19T08:15:05.466382+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 273270560,
        "imo": 9332810,
        "name": "PHOENIX",
        "flag": "RUSSIA"
    },
    "min_distance_m": 59.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 63.2999999999999971578290569595992565155029296875,
    "distance_consistency_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 56.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 3401,
    "speed_a_avg": 0.320000000000000006661338147750939242541790008544921875,
    "speed_a_std": 0.2099999999999999922284388276239042170345783233642578125,
    "speed_b_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.320000000000000006661338147750939242541790008544921875,
            "max_sog": 0.6999999999999999555910790149937383830547332763671875
        },
        "vessel_b": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-19T06:12:41+00:00",
        "end": "2026-07-19T07:09:22+00:00"
    },
    "points_count": {
        "vessel_a": 13,
        "vessel_b": 13
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 59m, avg 63m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 57 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (BUKWANG and PHOENIX) maintained close proximity (min 59m, avg 63m) for 57 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.0278631999999987556293490342795848846435546875,
            "lon": 129.0724500000000034560798667371273040771484375
        },
        "time_window": {
            "start_ts": "2026-07-19T06:12:41+00:00",
            "end_ts": "2026-07-19T07:09:22+00:00"
        },
        "searched_at": "2026-07-19T08:15:05.466382+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 19, 2026 06:01 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 13m
  • Data Points: 17 AIS positions
  • Period: 2026-07-19T06:01:01+00:00 to 2026-07-19T07:14:42+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 73.7000000000000028421709430404007434844970703125,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-07-19T06:01:01+00:00",
        "lat": 35.02758829999999790061337989754974842071533203125,
        "lon": 129.072386700000009795985533855855464935302734375
    },
    "last_point": {
        "ts": "2026-07-19T07:14:42+00:00",
        "lat": 35.02714329999999876008587307296693325042724609375,
        "lon": 129.0796116999999867402948439121246337890625
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 19, 2026 05:06 UTC 90/100 ▼
Vessel A: PHOENIX (PHOENIX) RUSSIA
Vessel B: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
  • Minimum Distance: 59 meters
  • Average Distance: 66 meters
  • Duration: 1h 57m
  • Period: 2026-07-19T05:06:09+00:00 to 2026-07-19T07:03:07+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (PHOENIX and BUKWANG) maintained close proximity (min 59m, avg 66m) for 117 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 59m, avg 66m
Duration20/25Duration 117 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±7m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-19T11:45:01.465553+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273270560,
        "imo": 9332810,
        "name": "PHOENIX",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 59.39999999999999857891452847979962825775146484375,
    "avg_distance_m": 65.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 6.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 117,
    "overlap_duration_s": 7018,
    "speed_a_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_a_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_b_std": 0.1600000000000000033306690738754696212708950042724609375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0.2300000000000000099920072216264088638126850128173828125,
            "max_sog": 0.5
        }
    },
    "time_window": {
        "start": "2026-07-19T05:06:09+00:00",
        "end": "2026-07-19T07:03:07+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 59m, avg 66m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 117 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PHOENIX and BUKWANG) maintained close proximity (min 59m, avg 66m) for 117 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.0277856000000014091710909269750118255615234375,
            "lon": 129.072492000000011103111319243907928466796875
        },
        "time_window": {
            "start_ts": "2026-07-19T05:06:09+00:00",
            "end_ts": "2026-07-19T07:03:07+00:00"
        },
        "searched_at": "2026-07-19T11:45:01.465553+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 19, 2026 05:05 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 2h 9m
  • Data Points: 23 AIS positions
  • Period: 2026-07-19T05:05:00+00:00 to 2026-07-19T07:14:42+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 129.69999999999998863131622783839702606201171875,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-07-19T05:05:00+00:00",
        "lat": 35.0275232999999985850081429816782474517822265625,
        "lon": 129.072161700000009432187653146684169769287109375
    },
    "last_point": {
        "ts": "2026-07-19T07:14:42+00:00",
        "lat": 35.02714329999999876008587307296693325042724609375,
        "lon": 129.0796116999999867402948439121246337890625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 19, 2026 05:05 UTC 75.0% ▼
  • Duration: 2h 9m
  • Radius: 638 meters
  • Data Points: 23 AIS positions
  • Centroid: 35.0275, 129.0726
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 637.8999999999999772626324556767940521240234375,
    "duration_minutes": 129.69999999999998863131622783839702606201171875,
    "points": 23,
    "centroid": {
        "lat": 35.02753441739130124688017531298100948333740234375,
        "lon": 129.07263747826090138914878480136394500732421875
    },
    "bbox": {
        "min_lat": 35.02714329999999876008587307296693325042724609375,
        "min_lon": 129.07215999999999667124939151108264923095703125,
        "max_lat": 35.02774000000000143018041853792965412139892578125,
        "max_lon": 129.0796116999999867402948439121246337890625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 19, 2026 04:44 UTC 75/100 ▼
Vessel A: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
Vessel B: PHOENIX (PHOENIX) RUSSIA
  • Minimum Distance: 65 meters
  • Average Distance: 70 meters
  • Duration: 34 minutes
  • Period: 2026-07-19T04:44:21+00:00 to 2026-07-19T05:19:01+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (BUKWANG and PHOENIX) maintained close proximity (min 65m, avg 70m) for 35 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 65m, avg 70m
Duration5/25Duration 35 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-19T08:15:01.744149+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 273270560,
        "imo": 9332810,
        "name": "PHOENIX",
        "flag": "RUSSIA"
    },
    "min_distance_m": 64.599999999999994315658113919198513031005859375,
    "avg_distance_m": 70.2999999999999971578290569595992565155029296875,
    "distance_consistency_m": 8.699999999999999289457264239899814128875732421875,
    "duration_minutes": 34.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 2080,
    "speed_a_avg": 0.1600000000000000033306690738754696212708950042724609375,
    "speed_a_std": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1600000000000000033306690738754696212708950042724609375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-19T04:44:21+00:00",
        "end": "2026-07-19T05:19:01+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 65m, avg 70m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 35 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (BUKWANG and PHOENIX) maintained close proximity (min 65m, avg 70m) for 35 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.0276137999999974681486492045223712921142578125,
            "lon": 129.072546200000005001129466108977794647216796875
        },
        "time_window": {
            "start_ts": "2026-07-19T04:44:21+00:00",
            "end_ts": "2026-07-19T05:19:01+00:00"
        },
        "searched_at": "2026-07-19T08:15:01.744149+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 19, 2026 04:05 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 3h 9m
  • Data Points: 34 AIS positions
  • Period: 2026-07-19T04:05:40+00:00 to 2026-07-19T07:14:42+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 189,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-07-19T04:05:40+00:00",
        "lat": 35.0277099999999990131982485763728618621826171875,
        "lon": 129.07216829999998708444763906300067901611328125
    },
    "last_point": {
        "ts": "2026-07-19T07:14:42+00:00",
        "lat": 35.02714329999999876008587307296693325042724609375,
        "lon": 129.0796116999999867402948439121246337890625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 19, 2026 04:05 UTC 75.0% ▼
  • Duration: 3h 9m
  • Radius: 649 meters
  • Data Points: 34 AIS positions
  • Centroid: 35.0275, 129.0725
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 649.1000000000000227373675443232059478759765625,
    "duration_minutes": 189,
    "points": 34,
    "centroid": {
        "lat": 35.0275409264705785972182638943195343017578125,
        "lon": 129.07251495882354674904490821063518524169921875
    },
    "bbox": {
        "min_lat": 35.02714329999999876008587307296693325042724609375,
        "min_lon": 129.07211330000001225926098413765430450439453125,
        "max_lat": 35.02777499999999832880348549224436283111572265625,
        "max_lon": 129.0796116999999867402948439121246337890625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 19, 2026 03:39 UTC 95/100 ▼
Vessel A: PHOENIX (PHOENIX) RUSSIA
Vessel B: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
  • Minimum Distance: 59 meters
  • Average Distance: 66 meters
  • Duration: 3h 24m
  • Period: 2026-07-19T03:39:08+00:00 to 2026-07-19T07:03:07+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (PHOENIX and BUKWANG) maintained close proximity (min 59m, avg 66m) for 204 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 59m, avg 66m
Duration25/25Duration 204 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-19T09:30:11.360295+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273270560,
        "imo": 9332810,
        "name": "PHOENIX",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 59.39999999999999857891452847979962825775146484375,
    "avg_distance_m": 65.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 6.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 204,
    "overlap_duration_s": 12239,
    "speed_a_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_a_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_avg": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_b_std": 0.14000000000000001332267629550187848508358001708984375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0.2300000000000000099920072216264088638126850128173828125,
            "max_sog": 0.5
        }
    },
    "time_window": {
        "start": "2026-07-19T03:39:08+00:00",
        "end": "2026-07-19T07:03:07+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 59m, avg 66m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 204 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PHOENIX and BUKWANG) maintained close proximity (min 59m, avg 66m) for 204 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.0277949000000035084667615592479705810546875,
            "lon": 129.07248229999999011852196417748928070068359375
        },
        "time_window": {
            "start_ts": "2026-07-19T03:39:08+00:00",
            "end_ts": "2026-07-19T07:03:07+00:00"
        },
        "searched_at": "2026-07-19T09:30:11.360295+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 19, 2026 03:02 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 4h 12m
  • Data Points: 42 AIS positions
  • Period: 2026-07-19T03:02:20+00:00 to 2026-07-19T07:14:42+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 252.400000000000005684341886080801486968994140625,
    "points_in_zone": 42,
    "first_point": {
        "ts": "2026-07-19T03:02:20+00:00",
        "lat": 35.02823500000000223053575609810650348663330078125,
        "lon": 129.0717832999999927778844721615314483642578125
    },
    "last_point": {
        "ts": "2026-07-19T07:14:42+00:00",
        "lat": 35.02714329999999876008587307296693325042724609375,
        "lon": 129.0796116999999867402948439121246337890625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 19, 2026 03:02 UTC 75.0% ▼
  • Duration: 4h 12m
  • Radius: 658 meters
  • Data Points: 42 AIS positions
  • Centroid: 35.0276, 129.0724
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 658.1000000000000227373675443232059478759765625,
    "duration_minutes": 252.400000000000005684341886080801486968994140625,
    "points": 42,
    "centroid": {
        "lat": 35.027624319047617973410524427890777587890625,
        "lon": 129.0724242571428703740821219980716705322265625
    },
    "bbox": {
        "min_lat": 35.02714329999999876008587307296693325042724609375,
        "min_lon": 129.0717832999999927778844721615314483642578125,
        "max_lat": 35.02823500000000223053575609810650348663330078125,
        "max_lon": 129.0796116999999867402948439121246337890625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 19, 2026 02:06 UTC 95/100 ▼
Vessel A: PHOENIX (PHOENIX) RUSSIA
Vessel B: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
  • Minimum Distance: 56 meters
  • Average Distance: 65 meters
  • Duration: 4h 57m
  • Period: 2026-07-19T02:06:09+00:00 to 2026-07-19T07:03:07+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (PHOENIX and BUKWANG) maintained close proximity (min 56m, avg 65m) for 297 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 56m, avg 65m
Duration25/25Duration 297 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273270560,
        "imo": 9332810,
        "name": "PHOENIX",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 55.7999999999999971578290569595992565155029296875,
    "avg_distance_m": 64.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 6.5,
    "duration_minutes": 297,
    "overlap_duration_s": 17818,
    "speed_a_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_a_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_avg": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_b_std": 0.11999999999999999555910790149937383830547332763671875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0.2300000000000000099920072216264088638126850128173828125,
            "max_sog": 0.5
        }
    },
    "time_window": {
        "start": "2026-07-19T02:06:09+00:00",
        "end": "2026-07-19T07:03:07+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 56m, avg 65m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 297 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PHOENIX and BUKWANG) maintained close proximity (min 56m, avg 65m) for 297 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 19, 2026 02:01 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 5h 13m
  • Data Points: 55 AIS positions
  • Period: 2026-07-19T02:01:29+00:00 to 2026-07-19T07:14:42+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 313.19999999999998863131622783839702606201171875,
    "points_in_zone": 55,
    "first_point": {
        "ts": "2026-07-19T02:01:29+00:00",
        "lat": 35.02824170000000236768755712546408176422119140625,
        "lon": 129.071134999999998171915649436414241790771484375
    },
    "last_point": {
        "ts": "2026-07-19T07:14:42+00:00",
        "lat": 35.02714329999999876008587307296693325042724609375,
        "lon": 129.0796116999999867402948439121246337890625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 19, 2026 02:01 UTC 75.0% ▼
  • Duration: 5h 13m
  • Radius: 680 meters
  • Data Points: 55 AIS positions
  • Centroid: 35.0278, 129.0722
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 679.5,
    "duration_minutes": 313.19999999999998863131622783839702606201171875,
    "points": 55,
    "centroid": {
        "lat": 35.0277687836363611495471559464931488037109375,
        "lon": 129.0722044618181598707451485097408294677734375
    },
    "bbox": {
        "min_lat": 35.02714329999999876008587307296693325042724609375,
        "min_lon": 129.071134999999998171915649436414241790771484375,
        "max_lat": 35.0283850000000001045918907038867473602294921875,
        "max_lon": 129.0796116999999867402948439121246337890625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 19, 2026 01:59 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 5h 15m
  • Data Points: 56 AIS positions
  • Period: 2026-07-19T01:59:18+00:00 to 2026-07-19T07:14:42+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 315.3999999999999772626324556767940521240234375,
    "points_in_zone": 56,
    "first_point": {
        "ts": "2026-07-19T01:59:18+00:00",
        "lat": 35.028833300000002282104105688631534576416015625,
        "lon": 129.07188669999999319770722649991512298583984375
    },
    "last_point": {
        "ts": "2026-07-19T07:14:42+00:00",
        "lat": 35.02714329999999876008587307296693325042724609375,
        "lon": 129.0796116999999867402948439121246337890625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 19, 2026 01:59 UTC 75.0% ▼
  • Duration: 5h 15m
  • Radius: 680 meters
  • Data Points: 56 AIS positions
  • Centroid: 35.0278, 129.0722
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 680.299999999999954525264911353588104248046875,
    "duration_minutes": 315.3999999999999772626324556767940521240234375,
    "points": 56,
    "centroid": {
        "lat": 35.02778779285714705338250496424734592437744140625,
        "lon": 129.07219878749998542843968607485294342041015625
    },
    "bbox": {
        "min_lat": 35.02714329999999876008587307296693325042724609375,
        "min_lon": 129.071134999999998171915649436414241790771484375,
        "max_lat": 35.028833300000002282104105688631534576416015625,
        "max_lon": 129.0796116999999867402948439121246337890625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 18, 2026 10:03 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 46m
  • Data Points: 25 AIS positions
  • Period: 2026-07-18T10:03:01+00:00 to 2026-07-18T11:49:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 106.7999999999999971578290569595992565155029296875,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-07-18T10:03:01+00:00",
        "lat": 35.01776670000000279969754046760499477386474609375,
        "lon": 129.059609999999992169250617735087871551513671875
    },
    "last_point": {
        "ts": "2026-07-18T11:49:52+00:00",
        "lat": 35.017161700000002610977389849722385406494140625,
        "lon": 129.05980829999998604762367904186248779296875
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 18, 2026 10:03 UTC 75.0% ▼
  • Duration: 1h 46m
  • Radius: 71 meters
  • Data Points: 25 AIS positions
  • Centroid: 35.0173, 129.0596
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 70.5,
    "duration_minutes": 106.7999999999999971578290569595992565155029296875,
    "points": 25,
    "centroid": {
        "lat": 35.0173398040000023456741473637521266937255859375,
        "lon": 129.059639127999986385475494898855686187744140625
    },
    "bbox": {
        "min_lat": 35.0168182999999970661519910208880901336669921875,
        "min_lon": 129.059258300000010422081686556339263916015625,
        "max_lat": 35.01797499999999985220711096189916133880615234375,
        "max_lon": 129.059838299999995570033206604421138763427734375
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 18, 2026 09:22 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 2h 27m
  • Data Points: 33 AIS positions
  • Period: 2026-07-18T09:22:50+00:00 to 2026-07-18T11:49:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 147,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-07-18T09:22:50+00:00",
        "lat": 35.0235500000000001818989403545856475830078125,
        "lon": 129.06351169999999228821252472698688507080078125
    },
    "last_point": {
        "ts": "2026-07-18T11:49:52+00:00",
        "lat": 35.017161700000002610977389849722385406494140625,
        "lon": 129.05980829999998604762367904186248779296875
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 18, 2026 09:22 UTC 75.0% ▼
  • Duration: 2h 27m
  • Radius: 725 meters
  • Data Points: 33 AIS positions
  • Centroid: 35.0177, 129.0600
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 724.8999999999999772626324556767940521240234375,
    "duration_minutes": 147,
    "points": 33,
    "centroid": {
        "lat": 35.0176762181818190811100066639482975006103515625,
        "lon": 129.060033027272737626844900660216808319091796875
    },
    "bbox": {
        "min_lat": 35.0165367000000031794115784578025341033935546875,
        "min_lon": 129.059258300000010422081686556339263916015625,
        "max_lat": 35.0235500000000001818989403545856475830078125,
        "max_lon": 129.06351169999999228821252472698688507080078125
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 17, 2026 09:32 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 15m
  • Data Points: 18 AIS positions
  • Period: 2026-07-17T09:32:16+00:00 to 2026-07-17T10:47:18+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 75,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-07-17T09:32:16+00:00",
        "lat": 34.8712732999999985850081429816782474517822265625,
        "lon": 128.878073300000011158772394992411136627197265625
    },
    "last_point": {
        "ts": "2026-07-17T10:47:18+00:00",
        "lat": 35.0181917000000026973793865181505680084228515625,
        "lon": 129.0879866999999876497895456850528717041015625
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 16, 2026 20:05 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 1m
  • Data Points: 19 AIS positions
  • Period: 2026-07-16T20:05:09+00:00 to 2026-07-16T21:06:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 61.60000000000000142108547152020037174224853515625,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-07-16T20:05:09+00:00",
        "lat": 35.00010329999999925121301203034818172454833984375,
        "lon": 129.049135000000006812115316279232501983642578125
    },
    "last_point": {
        "ts": "2026-07-16T21:06:48+00:00",
        "lat": 34.889825000000001864464138634502887725830078125,
        "lon": 128.895540000000011104930308647453784942626953125
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 16, 2026 19:45 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 21m
  • Data Points: 26 AIS positions
  • Period: 2026-07-16T19:45:28+00:00 to 2026-07-16T21:06:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 81.2999999999999971578290569595992565155029296875,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-07-16T19:45:28+00:00",
        "lat": 35.02893329999999849633240955881774425506591796875,
        "lon": 129.101821699999987913543009199202060699462890625
    },
    "last_point": {
        "ts": "2026-07-16T21:06:48+00:00",
        "lat": 34.889825000000001864464138634502887725830078125,
        "lon": 128.895540000000011104930308647453784942626953125
    }
}
Methodology: 2026.01.18
Ais Gap🛰️✗ Archipelago Sea Sanction Zone
Jul 16, 2026 04:44 UTC 70.0% ▼
  • Gap Duration: 5h 53m
  • Last Seen: 2026-07-16T04:44:41+00:00 at 35.2442, 129.3101 (Zone: Archipelago Sea Sanction Zone)
  • Next Seen: 2026-07-16T10:37:45+00:00 at 35.2098, 129.2691

🛰️ Gap Corroboration

✗ No Imagery

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

SAR Imagery (Sentinel-1)

Status: ✗ No SAR coverage

No Sentinel-1 scenes covering corridor and time window

VIIRS Thermal Anomaly

Status: ✗ No detections

No VIIRS thermal/light detections in corridor

Searched: 2026-07-16T10:45:01.747791+00:00

Show Raw Evidence JSON
{
    "gap_minutes": 353.1000000000000227373675443232059478759765625,
    "last_seen": {
        "ts": "2026-07-16T04:44:41+00:00",
        "lat": 35.244241700000003447712515480816364288330078125,
        "lon": 129.310123299999986556940712034702301025390625,
        "sog": 13.4000000000000003552713678800500929355621337890625,
        "zone_id": "discovered_002"
    },
    "next_seen": {
        "ts": "2026-07-16T10:37:45+00:00",
        "lat": 35.20977830000000352583811036311089992523193359375,
        "lon": 129.269126699999986840339261107146739959716796875,
        "zone_ids": [
            "discovered_002"
        ]
    },
    "gap_enrichment": {
        "status": "not_found",
        "corridor": {
            "start": {
                "lat": 35.244241700000003447712515480816364288330078125,
                "lon": 129.310123299999986556940712034702301025390625,
                "ts": "2026-07-16T04:44:41+00:00"
            },
            "end": {
                "lat": 35.20977830000000352583811036311089992523193359375,
                "lon": 129.269126699999986840339261107146739959716796875,
                "ts": "2026-07-16T10:37:45+00:00"
            },
            "bbox": {
                "min_lat": 35.02959800000000001318767317570745944976806640625,
                "min_lon": 129.048553999999995767211657948791980743408203125,
                "max_lat": 35.42442199999999985493559506721794605255126953125,
                "max_lon": 129.530696000000006051777745597064495086669921875
            },
            "buffer_km": 20
        },
        "sar": {
            "status": "not_found",
            "notes": "No Sentinel-1 scenes covering corridor and time window"
        },
        "viirs": {
            "status": "not_found",
            "notes": "No VIIRS thermal\/light detections in corridor"
        },
        "searched_at": "2026-07-16T10:45:01.747791+00:00"
    }
}
Methodology: 2026.01.18
Zone Dwell Archipelago Sea Sanction Zone
Jul 16, 2026 04:21 UTC 80.0% ▼
  • Zone: Archipelago Sea Sanction Zone
  • Duration: 6h 20m
  • Data Points: 7 AIS positions
  • Period: 2026-07-16T04:21:20+00:00 to 2026-07-16T10:42:05+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_002",
    "zone_name": "Archipelago Sea Sanction Zone",
    "dwell_minutes": 380.80000000000001136868377216160297393798828125,
    "points_in_zone": 7,
    "first_point": {
        "ts": "2026-07-16T04:21:20+00:00",
        "lat": 35.17193670000000338404788635671138763427734375,
        "lon": 129.249423299999989467323757708072662353515625
    },
    "last_point": {
        "ts": "2026-07-16T10:42:05+00:00",
        "lat": 35.19942499999999796500560478307306766510009765625,
        "lon": 129.260358300000007147900760173797607421875
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 16, 2026 02:03 UTC 67/100 ▼
Vessel A: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
Vessel B: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
  • Minimum Distance: 6 meters
  • Average Distance: 14 meters
  • Duration: 34 minutes
  • Period: 2026-07-16T02:03:47+00:00 to 2026-07-16T02:38:17+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.7 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 67/100

Moderate-confidence STS candidate. Two tankers (BUKWANG and KUKDONG3HO) maintained close proximity (min 6m, avg 14m) for 34 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.7 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 6m, avg 14m
Duration5/25Duration 34 minutes
Speed Stability12/20both very slow; somewhat variable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-16T08:45:07.360809+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 6.4000000000000003552713678800500929355621337890625,
    "avg_distance_m": 14.199999999999999289457264239899814128875732421875,
    "distance_consistency_m": 6,
    "duration_minutes": 34.5,
    "overlap_duration_s": 2070,
    "speed_a_avg": 0.13000000000000000444089209850062616169452667236328125,
    "speed_a_std": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_b_avg": 0.70999999999999996447286321199499070644378662109375,
    "speed_b_std": 0.58999999999999996891375531049561686813831329345703125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.13000000000000000444089209850062616169452667236328125,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.70999999999999996447286321199499070644378662109375,
            "max_sog": 1.5
        }
    },
    "time_window": {
        "start": "2026-07-16T02:03:47+00:00",
        "end": "2026-07-16T02:38:17+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 67,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 6m, avg 14m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 34 minutes"
            },
            "speed_stability": {
                "score": 12,
                "max": 20,
                "detail": "both very slow; somewhat variable 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (BUKWANG and KUKDONG3HO) maintained close proximity (min 6m, avg 14m) for 34 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.7 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.029514100000000098589225672185420989990234375,
            "lon": 129.07296400000001312946551479399204254150390625
        },
        "time_window": {
            "start_ts": "2026-07-16T02:03:47+00:00",
            "end_ts": "2026-07-16T02:38:17+00:00"
        },
        "searched_at": "2026-07-16T08:45:07.360809+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 16, 2026 02:00 UTC 80/100 ▼
Vessel A: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
Vessel B: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
  • Minimum Distance: 48 meters
  • Average Distance: 54 meters
  • Duration: 51 minutes
  • Period: 2026-07-16T02:00:37+00:00 to 2026-07-16T02:51:48+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (BUKWANG and SUNGJIN ACE) maintained close proximity (min 48m, avg 54m) for 51 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 Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 48m, avg 54m
Duration10/25Duration 51 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-16T08:45:09.756229+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 47.60000000000000142108547152020037174224853515625,
    "avg_distance_m": 53.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 4.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 51.2000000000000028421709430404007434844970703125,
    "overlap_duration_s": 3071,
    "speed_a_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_a_std": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_b_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_b_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-07-16T02:00:37+00:00",
        "end": "2026-07-16T02:51:48+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 48m, avg 54m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 51 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (BUKWANG and SUNGJIN ACE) maintained close proximity (min 48m, avg 54m) for 51 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 Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.02942879999999803430910105817019939422607421875,
            "lon": 129.07330719999998791536199860274791717529296875
        },
        "time_window": {
            "start_ts": "2026-07-16T02:00:37+00:00",
            "end_ts": "2026-07-16T02:51:48+00:00"
        },
        "searched_at": "2026-07-16T08:45:09.756229+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 16, 2026 01:18 UTC 82/100 ▼
Vessel A: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
Vessel B: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
  • Minimum Distance: 38 meters
  • Average Distance: 54 meters
  • Duration: 1h 29m
  • Period: 2026-07-16T01:27:48+00:00 to 2026-07-16T02:57:10+00:00
  • Vessel A Avg Speed: 0.3 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 82/100

High-confidence STS candidate. Two tankers (SUNGJIN ACE and BUKWANG) maintained close proximity (min 38m, avg 54m) for 89 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 38m, avg 54m
Duration15/25Duration 89 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±15m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 38.2999999999999971578290569595992565155029296875,
    "avg_distance_m": 54.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 15,
    "duration_minutes": 89.400000000000005684341886080801486968994140625,
    "overlap_duration_s": 5362,
    "speed_a_avg": 0.330000000000000015543122344752191565930843353271484375,
    "speed_a_std": 0.4899999999999999911182158029987476766109466552734375,
    "speed_b_avg": 0.200000000000000011102230246251565404236316680908203125,
    "speed_b_std": 0.1700000000000000122124532708767219446599483489990234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.330000000000000015543122344752191565930843353271484375,
            "max_sog": 1.899999999999999911182158029987476766109466552734375
        },
        "vessel_b": {
            "avg_sog": 0.200000000000000011102230246251565404236316680908203125,
            "max_sog": 0.5
        }
    },
    "time_window": {
        "start": "2026-07-16T01:27:48+00:00",
        "end": "2026-07-16T02:57:10+00:00"
    },
    "points_count": {
        "vessel_a": 22,
        "vessel_b": 22
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 82,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 38m, avg 54m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 89 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b115m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (SUNGJIN ACE and BUKWANG) maintained close proximity (min 38m, avg 54m) for 89 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 16, 2026 01:07 UTC 87/100 ▼
Vessel A: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
Vessel B: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
  • Minimum Distance: 6 meters
  • Average Distance: 13 meters
  • Duration: 1h 30m
  • Period: 2026-07-16T01:07:37+00:00 to 2026-07-16T02:38:17+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.5 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 87/100

High-confidence STS candidate. Two tankers (BUKWANG and KUKDONG3HO) maintained close proximity (min 6m, avg 13m) for 91 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.5 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 6m, avg 13m
Duration20/25Duration 91 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-16T07:45:11.339797+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 6.4000000000000003552713678800500929355621337890625,
    "avg_distance_m": 13.4000000000000003552713678800500929355621337890625,
    "distance_consistency_m": 4.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 90.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 5440,
    "speed_a_avg": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_a_std": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_b_avg": 0.450000000000000011102230246251565404236316680908203125,
    "speed_b_std": 0.479999999999999982236431605997495353221893310546875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1499999999999999944488848768742172978818416595458984375,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.450000000000000011102230246251565404236316680908203125,
            "max_sog": 1.5
        }
    },
    "time_window": {
        "start": "2026-07-16T01:07:37+00:00",
        "end": "2026-07-16T02:38:17+00:00"
    },
    "points_count": {
        "vessel_a": 28,
        "vessel_b": 28
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 87,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 6m, avg 13m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 91 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (BUKWANG and KUKDONG3HO) maintained close proximity (min 6m, avg 13m) for 91 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.5 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.0295966999999990321157383732497692108154296875,
            "lon": 129.07278700000000526415533386170864105224609375
        },
        "time_window": {
            "start_ts": "2026-07-16T01:07:37+00:00",
            "end_ts": "2026-07-16T02:38:17+00:00"
        },
        "searched_at": "2026-07-16T07:45:11.339797+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 16, 2026 01:03 UTC 72/100 ▼
Vessel A: MMSI 440192560 (JINSUNG) REPUBLIC OF KOREA
Vessel B: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
  • Minimum Distance: 40 meters
  • Average Distance: 45 meters
  • Duration: 43 minutes
  • Period: 2026-07-16T01:03:45+00:00 to 2026-07-16T01:46:52+00:00
  • Vessel A Avg Speed: 0.5 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 72/100

Moderate-confidence STS candidate. Two tankers (JINSUNG and BUKWANG) maintained close proximity (min 40m, avg 45m) for 43 minutes. Both vessels were slow-moving (avg speeds 0.5 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 40m, avg 45m
Duration5/25Duration 43 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-16T07:45:06.505146+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440192560,
        "name": "JINSUNG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 40.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 44.89999999999999857891452847979962825775146484375,
    "distance_consistency_m": 4,
    "duration_minutes": 43.10000000000000142108547152020037174224853515625,
    "overlap_duration_s": 2587,
    "speed_a_avg": 0.460000000000000019984014443252817727625370025634765625,
    "speed_a_std": 0.34999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.1600000000000000033306690738754696212708950042724609375,
    "speed_b_std": 0.11999999999999999555910790149937383830547332763671875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.460000000000000019984014443252817727625370025634765625,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0.1600000000000000033306690738754696212708950042724609375,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-07-16T01:03:45+00:00",
        "end": "2026-07-16T01:46:52+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 72,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 40m, avg 45m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 43 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (JINSUNG and BUKWANG) maintained close proximity (min 40m, avg 45m) for 43 minutes. Both vessels were slow-moving (avg speeds 0.5 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.02951560000000341688064509071409702301025390625,
            "lon": 129.0728033999999979641870595514774322509765625
        },
        "time_window": {
            "start_ts": "2026-07-16T01:03:45+00:00",
            "end_ts": "2026-07-16T01:46:52+00:00"
        },
        "searched_at": "2026-07-16T07:45:06.505146+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 16, 2026 01:02 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 53m
  • Data Points: 34 AIS positions
  • Period: 2026-07-16T01:02:27+00:00 to 2026-07-16T02:55:34+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 113.099999999999994315658113919198513031005859375,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-07-16T01:02:27+00:00",
        "lat": 35.02978329999999829169610165990889072418212890625,
        "lon": 129.072239999999993642632034607231616973876953125
    },
    "last_point": {
        "ts": "2026-07-16T02:55:34+00:00",
        "lat": 35.03010669999999748824848211370408535003662109375,
        "lon": 129.073443300000008093775250017642974853515625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 16, 2026 01:02 UTC 75.0% ▼
  • Duration: 1h 53m
  • Radius: 82 meters
  • Data Points: 34 AIS positions
  • Centroid: 35.0296, 129.0728
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 82.099999999999994315658113919198513031005859375,
    "duration_minutes": 113.099999999999994315658113919198513031005859375,
    "points": 34,
    "centroid": {
        "lat": 35.02956353529413036085315980017185211181640625,
        "lon": 129.0728326029411618947051465511322021484375
    },
    "bbox": {
        "min_lat": 35.02931000000000238969732890836894512176513671875,
        "min_lon": 129.0722167000000126790837384760379791259765625,
        "max_lat": 35.03010669999999748824848211370408535003662109375,
        "max_lon": 129.073443300000008093775250017642974853515625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 16, 2026 00:05 UTC 92/100 ▼
Vessel A: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
Vessel B: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
  • Minimum Distance: 4 meters
  • Average Distance: 13 meters
  • Duration: 2h 33m
  • Period: 2026-07-16T00:05:06+00:00 to 2026-07-16T02:38:17+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.4 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 92/100

High-confidence STS candidate. Two tankers (BUKWANG and KUKDONG3HO) maintained close proximity (min 4m, avg 13m) for 153 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 4m, avg 13m
Duration25/25Duration 153 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-16T06:45:01.899431+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 3.5,
    "avg_distance_m": 13.300000000000000710542735760100185871124267578125,
    "distance_consistency_m": 5.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 153.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 9191,
    "speed_a_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_a_std": 0.14000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0.38000000000000000444089209850062616169452667236328125,
    "speed_b_std": 0.409999999999999975575093458246556110680103302001953125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.38000000000000000444089209850062616169452667236328125,
            "max_sog": 1.5
        }
    },
    "time_window": {
        "start": "2026-07-16T00:05:06+00:00",
        "end": "2026-07-16T02:38:17+00:00"
    },
    "points_count": {
        "vessel_a": 45,
        "vessel_b": 45
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 92,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 4m, avg 13m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 153 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (BUKWANG and KUKDONG3HO) maintained close proximity (min 4m, avg 13m) for 153 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.02957169999999820220182300545275211334228515625,
            "lon": 129.072778900000002977321855723857879638671875
        },
        "time_window": {
            "start_ts": "2026-07-16T00:05:06+00:00",
            "end_ts": "2026-07-16T02:38:17+00:00"
        },
        "searched_at": "2026-07-16T06:45:01.899431+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 16, 2026 00:05 UTC 82/100 ▼
Vessel A: MMSI 440192560 (JINSUNG) REPUBLIC OF KOREA
Vessel B: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
  • Minimum Distance: 30 meters
  • Average Distance: 44 meters
  • Duration: 1h 12m
  • Period: 2026-07-16T00:34:24+00:00 to 2026-07-16T01:46:52+00:00
  • Vessel A Avg Speed: 0.4 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 82/100

High-confidence STS candidate. Two tankers (JINSUNG and BUKWANG) maintained close proximity (min 30m, avg 44m) for 72 minutes. Both vessels were slow-moving (avg speeds 0.4 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 30m, avg 44m
Duration15/25Duration 72 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440192560,
        "name": "JINSUNG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 30.300000000000000710542735760100185871124267578125,
    "avg_distance_m": 43.7000000000000028421709430404007434844970703125,
    "distance_consistency_m": 4.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 72.5,
    "overlap_duration_s": 4348,
    "speed_a_avg": 0.38000000000000000444089209850062616169452667236328125,
    "speed_a_std": 0.330000000000000015543122344752191565930843353271484375,
    "speed_b_avg": 0.1600000000000000033306690738754696212708950042724609375,
    "speed_b_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.38000000000000000444089209850062616169452667236328125,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0.1600000000000000033306690738754696212708950042724609375,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-07-16T00:34:24+00:00",
        "end": "2026-07-16T01:46:52+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 82,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 30m, avg 44m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 72 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (JINSUNG and BUKWANG) maintained close proximity (min 30m, avg 44m) for 72 minutes. Both vessels were slow-moving (avg speeds 0.4 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 16, 2026 00:00 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 2h 55m
  • Data Points: 50 AIS positions
  • Period: 2026-07-16T00:00:27+00:00 to 2026-07-16T02:55:34+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 175.099999999999994315658113919198513031005859375,
    "points_in_zone": 50,
    "first_point": {
        "ts": "2026-07-16T00:00:27+00:00",
        "lat": 35.02938329999999922392817097716033458709716796875,
        "lon": 129.07294830000000729341991245746612548828125
    },
    "last_point": {
        "ts": "2026-07-16T02:55:34+00:00",
        "lat": 35.03010669999999748824848211370408535003662109375,
        "lon": 129.073443300000008093775250017642974853515625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 16, 2026 00:00 UTC 75.0% ▼
  • Duration: 2h 55m
  • Radius: 85 meters
  • Data Points: 50 AIS positions
  • Centroid: 35.0295, 129.0728
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 84.5,
    "duration_minutes": 175.099999999999994315658113919198513031005859375,
    "points": 50,
    "centroid": {
        "lat": 35.02952630799999411692624562419950962066650390625,
        "lon": 129.07284343800000669943983666598796844482421875
    },
    "bbox": {
        "min_lat": 35.029279999999999972715158946812152862548828125,
        "min_lon": 129.0722167000000126790837384760379791259765625,
        "max_lat": 35.03010669999999748824848211370408535003662109375,
        "max_lon": 129.073443300000008093775250017642974853515625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 15, 2026 23:16 UTC 95/100 ▼
Vessel A: MMSI 440192560 (JINSUNG) REPUBLIC OF KOREA
Vessel B: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
  • Minimum Distance: 17 meters
  • Average Distance: 42 meters
  • Duration: 2h 30m
  • Period: 2026-07-15T23:16:05+00:00 to 2026-07-16T01:46:52+00:00
  • Vessel A Avg Speed: 0.3 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (JINSUNG and BUKWANG) maintained close proximity (min 17m, avg 42m) for 151 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 17m, avg 42m
Duration25/25Duration 151 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±7m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-16T05:45:06.679889+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440192560,
        "name": "JINSUNG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 17.39999999999999857891452847979962825775146484375,
    "avg_distance_m": 42.10000000000000142108547152020037174224853515625,
    "distance_consistency_m": 6.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 150.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 9047,
    "speed_a_avg": 0.309999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.270000000000000017763568394002504646778106689453125,
    "speed_b_avg": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_b_std": 0.11999999999999999555910790149937383830547332763671875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.309999999999999997779553950749686919152736663818359375,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0.1499999999999999944488848768742172978818416595458984375,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-07-15T23:16:05+00:00",
        "end": "2026-07-16T01:46:52+00:00"
    },
    "points_count": {
        "vessel_a": 31,
        "vessel_b": 31
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 17m, avg 42m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 151 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (JINSUNG and BUKWANG) maintained close proximity (min 17m, avg 42m) for 151 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.029352799999998069324647076427936553955078125,
            "lon": 129.072961999999989757270668633282184600830078125
        },
        "time_window": {
            "start_ts": "2026-07-15T23:16:05+00:00",
            "end_ts": "2026-07-16T01:46:52+00:00"
        },
        "searched_at": "2026-07-16T05:45:06.679889+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 15, 2026 23:04 UTC 92/100 ▼
Vessel A: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
Vessel B: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
  • Minimum Distance: 4 meters
  • Average Distance: 13 meters
  • Duration: 3h 33m
  • Period: 2026-07-15T23:04:26+00:00 to 2026-07-16T02:38:17+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.4 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 92/100

High-confidence STS candidate. Two tankers (BUKWANG and KUKDONG3HO) maintained close proximity (min 4m, avg 13m) for 214 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 4m, avg 13m
Duration25/25Duration 214 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-16T05:45:01.400748+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 3.5,
    "avg_distance_m": 13.199999999999999289457264239899814128875732421875,
    "distance_consistency_m": 4.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 213.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 12831,
    "speed_a_avg": 0.13000000000000000444089209850062616169452667236328125,
    "speed_a_std": 0.13000000000000000444089209850062616169452667236328125,
    "speed_b_avg": 0.36999999999999999555910790149937383830547332763671875,
    "speed_b_std": 0.38000000000000000444089209850062616169452667236328125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.13000000000000000444089209850062616169452667236328125,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.36999999999999999555910790149937383830547332763671875,
            "max_sog": 1.5
        }
    },
    "time_window": {
        "start": "2026-07-15T23:04:26+00:00",
        "end": "2026-07-16T02:38:17+00:00"
    },
    "points_count": {
        "vessel_a": 58,
        "vessel_b": 58
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 92,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 4m, avg 13m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 214 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (BUKWANG and KUKDONG3HO) maintained close proximity (min 4m, avg 13m) for 214 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.4 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.02953850000000102227204479277133941650390625,
            "lon": 129.07281080000001338703441433608531951904296875
        },
        "time_window": {
            "start_ts": "2026-07-15T23:04:26+00:00",
            "end_ts": "2026-07-16T02:38:17+00:00"
        },
        "searched_at": "2026-07-16T05:45:01.400748+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 15, 2026 23:04 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 3h 51m
  • Data Points: 62 AIS positions
  • Period: 2026-07-15T23:04:26+00:00 to 2026-07-16T02:55:34+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 231.099999999999994315658113919198513031005859375,
    "points_in_zone": 62,
    "first_point": {
        "ts": "2026-07-15T23:04:26+00:00",
        "lat": 35.02953670000000130357875605113804340362548828125,
        "lon": 129.07263499999999112333171069622039794921875
    },
    "last_point": {
        "ts": "2026-07-16T02:55:34+00:00",
        "lat": 35.03010669999999748824848211370408535003662109375,
        "lon": 129.073443300000008093775250017642974853515625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 15, 2026 23:04 UTC 75.0% ▼
  • Duration: 3h 51m
  • Radius: 86 meters
  • Data Points: 62 AIS positions
  • Centroid: 35.0295, 129.0729
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 85.900000000000005684341886080801486968994140625,
    "duration_minutes": 231.099999999999994315658113919198513031005859375,
    "points": 62,
    "centroid": {
        "lat": 35.02949866290321523365491884760558605194091796875,
        "lon": 129.072860488709665105488966219127178192138671875
    },
    "bbox": {
        "min_lat": 35.0291849999999982401277520693838596343994140625,
        "min_lon": 129.0722167000000126790837384760379791259765625,
        "max_lat": 35.03010669999999748824848211370408535003662109375,
        "max_lon": 129.073443300000008093775250017642974853515625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 15, 2026 22:08 UTC 95/100 ▼
Vessel A: MMSI 440192560 (JINSUNG) REPUBLIC OF KOREA
Vessel B: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
  • Minimum Distance: 17 meters
  • Average Distance: 42 meters
  • Duration: 3h 38m
  • Period: 2026-07-15T22:08:23+00:00 to 2026-07-16T01:46:52+00:00
  • Vessel A Avg Speed: 0.3 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (JINSUNG and BUKWANG) maintained close proximity (min 17m, avg 42m) for 218 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 17m, avg 42m
Duration25/25Duration 218 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-16T04:45:01.937591+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440192560,
        "name": "JINSUNG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 17.39999999999999857891452847979962825775146484375,
    "avg_distance_m": 41.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 5.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 218.5,
    "overlap_duration_s": 13109,
    "speed_a_avg": 0.309999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.2399999999999999911182158029987476766109466552734375,
    "speed_b_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_b_std": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.309999999999999997779553950749686919152736663818359375,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-07-15T22:08:23+00:00",
        "end": "2026-07-16T01:46:52+00:00"
    },
    "points_count": {
        "vessel_a": 43,
        "vessel_b": 43
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 17m, avg 42m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 218 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (JINSUNG and BUKWANG) maintained close proximity (min 17m, avg 42m) for 218 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.02937250000000091176843852736055850982666015625,
            "lon": 129.072879800000009709037840366363525390625
        },
        "time_window": {
            "start_ts": "2026-07-15T22:08:23+00:00",
            "end_ts": "2026-07-16T01:46:52+00:00"
        },
        "searched_at": "2026-07-16T04:45:01.937591+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Strait of Gibraltar Surveillance Zone
Jul 15, 2026 22:07 UTC 92/100 ▼
Vessel A: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
Vessel B: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
  • Minimum Distance: 4 meters
  • Average Distance: 13 meters
  • Duration: 4h 30m
  • Period: 2026-07-15T22:07:56+00:00 to 2026-07-16T02:38:17+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.3 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 92/100

High-confidence STS candidate. Two tankers (BUKWANG and KUKDONG3HO) maintained close proximity (min 4m, avg 13m) for 270 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 4m, avg 13m
Duration25/25Duration 270 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-16T04:45:07.213937+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 3.5,
    "avg_distance_m": 12.800000000000000710542735760100185871124267578125,
    "distance_consistency_m": 4.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 270.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 16221,
    "speed_a_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_a_std": 0.13000000000000000444089209850062616169452667236328125,
    "speed_b_avg": 0.340000000000000024424906541753443889319896697998046875,
    "speed_b_std": 0.35999999999999998667732370449812151491641998291015625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.340000000000000024424906541753443889319896697998046875,
            "max_sog": 1.5
        }
    },
    "time_window": {
        "start": "2026-07-15T22:07:56+00:00",
        "end": "2026-07-16T02:38:17+00:00"
    },
    "points_count": {
        "vessel_a": 71,
        "vessel_b": 71
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 92,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 4m, avg 13m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 270 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (BUKWANG and KUKDONG3HO) maintained close proximity (min 4m, avg 13m) for 270 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.02954849999999709098119637928903102874755859375,
            "lon": 129.072747700000007853304850868880748748779296875
        },
        "time_window": {
            "start_ts": "2026-07-15T22:07:56+00:00",
            "end_ts": "2026-07-16T02:38:17+00:00"
        },
        "searched_at": "2026-07-16T04:45:07.213937+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 15, 2026 22:01 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 4h 53m
  • Data Points: 77 AIS positions
  • Period: 2026-07-15T22:01:46+00:00 to 2026-07-16T02:55:34+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 293.80000000000001136868377216160297393798828125,
    "points_in_zone": 77,
    "first_point": {
        "ts": "2026-07-15T22:01:46+00:00",
        "lat": 35.02948500000000109366737888194620609283447265625,
        "lon": 129.07251830000001291409716941416263580322265625
    },
    "last_point": {
        "ts": "2026-07-16T02:55:34+00:00",
        "lat": 35.03010669999999748824848211370408535003662109375,
        "lon": 129.073443300000008093775250017642974853515625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 15, 2026 22:01 UTC 75.0% ▼
  • Duration: 4h 53m
  • Radius: 89 meters
  • Data Points: 77 AIS positions
  • Centroid: 35.0295, 129.0728
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 89.2000000000000028421709430404007434844970703125,
    "duration_minutes": 293.80000000000001136868377216160297393798828125,
    "points": 77,
    "centroid": {
        "lat": 35.02950792727273210402927361428737640380859375,
        "lon": 129.0727909805194713044329546391963958740234375
    },
    "bbox": {
        "min_lat": 35.0291849999999982401277520693838596343994140625,
        "min_lon": 129.0722167000000126790837384760379791259765625,
        "max_lat": 35.03010669999999748824848211370408535003662109375,
        "max_lon": 129.073443300000008093775250017642974853515625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 15, 2026 21:39 UTC 92/100 ▼
Vessel A: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
Vessel B: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
  • Minimum Distance: 4 meters
  • Average Distance: 13 meters
  • Duration: 4h 58m
  • Period: 2026-07-15T21:39:24+00:00 to 2026-07-16T02:38:17+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.3 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 92/100

High-confidence STS candidate. Two tankers (BUKWANG and KUKDONG3HO) maintained close proximity (min 4m, avg 13m) for 299 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 4m, avg 13m
Duration25/25Duration 299 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 3.5,
    "avg_distance_m": 12.699999999999999289457264239899814128875732421875,
    "distance_consistency_m": 4.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 298.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 17933,
    "speed_a_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_a_std": 0.13000000000000000444089209850062616169452667236328125,
    "speed_b_avg": 0.330000000000000015543122344752191565930843353271484375,
    "speed_b_std": 0.34999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.330000000000000015543122344752191565930843353271484375,
            "max_sog": 1.5
        }
    },
    "time_window": {
        "start": "2026-07-15T21:39:24+00:00",
        "end": "2026-07-16T02:38:17+00:00"
    },
    "points_count": {
        "vessel_a": 77,
        "vessel_b": 77
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 92,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 4m, avg 13m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 299 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; 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: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (BUKWANG and KUKDONG3HO) maintained close proximity (min 4m, avg 13m) for 299 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 15, 2026 21:39 UTC 95/100 ▼
Vessel A: MMSI 440192560 (JINSUNG) REPUBLIC OF KOREA
Vessel B: IMO 9181352 (BUKWANG) REPUBLIC OF KOREA
  • Minimum Distance: 17 meters
  • Average Distance: 43 meters
  • Duration: 4h 4m
  • Period: 2026-07-15T21:42:49+00:00 to 2026-07-16T01:46:52+00:00
  • Vessel A Avg Speed: 0.3 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (JINSUNG and BUKWANG) maintained close proximity (min 17m, avg 42m) for 244 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 17m, avg 42m
Duration25/25Duration 244 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±7m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440192560,
        "name": "JINSUNG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440191310,
        "imo": 9181352,
        "name": "BUKWANG",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 17.39999999999999857891452847979962825775146484375,
    "avg_distance_m": 42.5,
    "distance_consistency_m": 7,
    "duration_minutes": 244.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 14643,
    "speed_a_avg": 0.330000000000000015543122344752191565930843353271484375,
    "speed_a_std": 0.289999999999999980015985556747182272374629974365234375,
    "speed_b_avg": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_b_std": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.330000000000000015543122344752191565930843353271484375,
            "max_sog": 1.5
        },
        "vessel_b": {
            "avg_sog": 0.1499999999999999944488848768742172978818416595458984375,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-07-15T21:42:49+00:00",
        "end": "2026-07-16T01:46:52+00:00"
    },
    "points_count": {
        "vessel_a": 47,
        "vessel_b": 47
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 17m, avg 42m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 244 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Strait of Gibraltar Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (JINSUNG and BUKWANG) maintained close proximity (min 17m, avg 42m) for 244 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Strait of Gibraltar Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 15, 2026 21:05 UTC 80.0% ▼
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 5h 49m
  • Data Points: 89 AIS positions
  • Period: 2026-07-15T21:05:58+00:00 to 2026-07-16T02:55:34+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 349.6000000000000227373675443232059478759765625,
    "points_in_zone": 89,
    "first_point": {
        "ts": "2026-07-15T21:05:58+00:00",
        "lat": 35.03001669999999734272932983003556728363037109375,
        "lon": 129.06449670000000651270966045558452606201171875
    },
    "last_point": {
        "ts": "2026-07-16T02:55:34+00:00",
        "lat": 35.03010669999999748824848211370408535003662109375,
        "lon": 129.073443300000008093775250017642974853515625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 15, 2026 21:05 UTC 75.0% ▼
  • Duration: 5h 49m
  • Radius: 737 meters
  • Data Points: 89 AIS positions
  • Centroid: 35.0295, 129.0725
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 736.5,
    "duration_minutes": 349.6000000000000227373675443232059478759765625,
    "points": 89,
    "centroid": {
        "lat": 35.02947676404495069846234400756657123565673828125,
        "lon": 129.072541055056177583537646569311618804931640625
    },
    "bbox": {
        "min_lat": 35.02769500000000135742084239609539508819580078125,
        "min_lon": 129.06449670000000651270966045558452606201171875,
        "max_lat": 35.03010669999999748824848211370408535003662109375,
        "max_lon": 129.073443300000008093775250017642974853515625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Jul 19 07:14 35.0271 129.0796 12.7 kn 70.1° Strait of Gibraltar Surveillance Zone
Jul 19 07:11 35.0272 129.0722 3.2 kn 200.4° Strait of Gibraltar Surveillance Zone
Jul 19 07:09 35.0276 129.0722 0.6 kn 168.7° Strait of Gibraltar Surveillance Zone
Jul 19 07:05 35.0276 129.0723 0.0 kn 343.4° Strait of Gibraltar Surveillance Zone
Jul 19 06:56 35.0276 129.0723 0.2 kn 114.0° Strait of Gibraltar Surveillance Zone
Jul 19 06:49 35.0277 129.0722 0.4 kn 220.4° Strait of Gibraltar Surveillance Zone
Jul 19 06:42 35.0276 129.0723 0.5 kn 330.7° Strait of Gibraltar Surveillance Zone
Jul 19 06:39 35.0276 129.0723 0.2 kn 88.6° Strait of Gibraltar Surveillance Zone
Jul 19 06:36 35.0277 129.0723 0.3 kn 124.7° Strait of Gibraltar Surveillance Zone
Jul 19 06:27 35.0275 129.0723 0.2 kn 340.5° Strait of Gibraltar Surveillance Zone
Jul 19 06:25 35.0274 129.0724 0.4 kn 201.8° Strait of Gibraltar Surveillance Zone
Jul 19 06:23 35.0275 129.0724 0.4 kn 214.2° Strait of Gibraltar Surveillance Zone
Jul 19 06:20 35.0276 129.0724 0.7 kn 128.9° Strait of Gibraltar Surveillance Zone
Jul 19 06:15 35.0277 129.0722 0.2 kn 355.7° Strait of Gibraltar Surveillance Zone
Jul 19 06:12 35.0277 129.0722 0.0 kn 337.9° Strait of Gibraltar Surveillance Zone
Jul 19 06:03 35.0275 129.0725 0.2 kn 179.0° Strait of Gibraltar Surveillance Zone
Jul 19 06:01 35.0276 129.0724 0.2 kn 124.2° Strait of Gibraltar Surveillance Zone
Jul 19 05:52 35.0276 129.0723 0.4 kn 44.9° Strait of Gibraltar Surveillance Zone
Jul 19 05:42 35.0275 129.0723 0.1 kn 353.3° Strait of Gibraltar Surveillance Zone
Jul 19 05:36 35.0274 129.0725 0.3 kn 140.8° Strait of Gibraltar Surveillance Zone

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.