KUKDONG3HO

Vessel information

Vessel Name KUKDONG3HO
MMSI 440112380
Vessel Type Tanker
Flag 🏳️ REPUBLIC OF KOREA
Call Sign 200043
Length 47 m
Beam 4 m

Detected Events (46)

Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 31, 2026 21:02 UTC 80.0%
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 53m
  • Data Points: 26 AIS positions
  • Period: 2026-07-31T21:02:51+00:00 to 2026-07-31T22:55:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 113,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-07-31T21:02:51+00:00",
        "lat": 35.01213169999999763604137115180492401123046875,
        "lon": 129.05374000000000478394213132560253143310546875
    },
    "last_point": {
        "ts": "2026-07-31T22:55:52+00:00",
        "lat": 35.0095232999999979028871166519820690155029296875,
        "lon": 129.06477000000000998625182546675205230712890625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 31, 2026 21:02 UTC 75.0%
  • Duration: 1h 53m
  • Radius: 1,027 meters
  • Data Points: 26 AIS positions
  • Centroid: 35.0080, 129.0638
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 1027.09999999999990905052982270717620849609375,
    "duration_minutes": 113,
    "points": 26,
    "centroid": {
        "lat": 35.00803795384614858221539179794490337371826171875,
        "lon": 129.063832561538475829365779645740985870361328125
    },
    "bbox": {
        "min_lat": 35.00516669999999663787093595601618289947509765625,
        "min_lon": 129.05374000000000478394213132560253143310546875,
        "max_lat": 35.01213169999999763604137115180492401123046875,
        "max_lon": 129.06695669999999154242686927318572998046875
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 31, 2026 20:46 UTC 75.0%
  • Duration: 2h 9m
  • Radius: 967 meters
  • Data Points: 30 AIS positions
  • Centroid: 35.0089, 129.0636
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 966.799999999999954525264911353588104248046875,
    "duration_minutes": 129.69999999999998863131622783839702606201171875,
    "points": 30,
    "centroid": {
        "lat": 35.00886450333333499429500079713761806488037109375,
        "lon": 129.06355983333338599550188519060611724853515625
    },
    "bbox": {
        "min_lat": 35.00516669999999663787093595601618289947509765625,
        "min_lon": 129.05374000000000478394213132560253143310546875,
        "max_lat": 35.01613669999999700621629017405211925506591796875,
        "max_lon": 129.06882830000000694781192578375339508056640625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 31, 2026 20:30 UTC 80.0%
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 2h 25m
  • Data Points: 34 AIS positions
  • Period: 2026-07-31T20:30:11+00:00 to 2026-07-31T22:55:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 145.69999999999998863131622783839702606201171875,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-07-31T20:30:11+00:00",
        "lat": 35.030214999999998326529748737812042236328125,
        "lon": 129.0819083000000091487891040742397308349609375
    },
    "last_point": {
        "ts": "2026-07-31T22:55:52+00:00",
        "lat": 35.0095232999999979028871166519820690155029296875,
        "lon": 129.06477000000000998625182546675205230712890625
    }
}
Methodology: 2026.01.18
Ais Gap🛰️✗ Gulf of Cádiz Sanctions Monitoring Zone
Jul 31, 2026 00:31 UTC 70.0%
  • Gap Duration: 4h 18m
  • Last Seen: 2026-07-31T00:31:56+00:00 at 35.2853, 129.3312 (Zone: Gulf of Cádiz Sanctions Monitoring Zone)
  • Next Seen: 2026-07-31T04:50:39+00:00 at 35.2805, 129.3222

🛰️ 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: 2026-07-31T05:15:05.471695+00:00

Show Raw Evidence JSON
{
    "gap_minutes": 258.69999999999998863131622783839702606201171875,
    "last_seen": {
        "ts": "2026-07-31T00:31:56+00:00",
        "lat": 35.2852517000000034386175684630870819091796875,
        "lon": 129.331191700000005084802978672087192535400390625,
        "sog": 10.5,
        "zone_id": "discovered_002"
    },
    "next_seen": {
        "ts": "2026-07-31T04:50:39+00:00",
        "lat": 35.28050669999999655601641279645264148712158203125,
        "lon": 129.322206700000009504947229288518428802490234375,
        "zone_ids": [
            "discovered_002"
        ]
    },
    "gap_enrichment": {
        "status": "not_found",
        "corridor": {
            "start": {
                "lat": 35.2852517000000034386175684630870819091796875,
                "lon": 129.331191700000005084802978672087192535400390625,
                "ts": "2026-07-31T00:31:56+00:00"
            },
            "end": {
                "lat": 35.28050669999999655601641279645264148712158203125,
                "lon": 129.322206700000009504947229288518428802490234375,
                "ts": "2026-07-31T04:50:39+00:00"
            },
            "bbox": {
                "min_lat": 35.10032700000000005502442945726215839385986328125,
                "min_lon": 129.101482000000004290996002964675426483154296875,
                "max_lat": 35.46543199999999984584064804948866367340087890625,
                "max_lon": 129.551917000000003099557943642139434814453125
            },
            "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": "2026-07-31T05:15:05.471695+00:00"
    }
}
Methodology: 2026.01.18
Zone Dwell Gulf of Cádiz Sanctions Monitoring Zone
Jul 31, 2026 00:02 UTC 80.0%
  • Zone: Gulf of Cádiz Sanctions Monitoring Zone
  • Duration: 5h 28m
  • Data Points: 19 AIS positions
  • Period: 2026-07-31T00:02:16+00:00 to 2026-07-31T05:30:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_002",
    "zone_name": "Archipelago Sea Sanction Zone",
    "dwell_minutes": 328.69999999999998863131622783839702606201171875,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-07-31T00:02:16+00:00",
        "lat": 35.2030383000000028914655558764934539794921875,
        "lon": 129.2712467000000060579623095691204071044921875
    },
    "last_point": {
        "ts": "2026-07-31T05:30:59+00:00",
        "lat": 35.1991799999999983583620632998645305633544921875,
        "lon": 129.2560882999999876119545660912990570068359375
    }
}
Methodology: 2026.01.18
Zone Dwell Gulf of Cádiz Sanctions Monitoring Zone
Jul 30, 2026 23:50 UTC 80.0%
  • Zone: Gulf of Cádiz Sanctions Monitoring Zone
  • Duration: 5h 40m
  • Data Points: 22 AIS positions
  • Period: 2026-07-30T23:50:57+00:00 to 2026-07-31T05:30:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_002",
    "zone_name": "Archipelago Sea Sanction Zone",
    "dwell_minutes": 340,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-07-30T23:50:57+00:00",
        "lat": 35.1704433000000022957465262152254581451416015625,
        "lon": 129.245803300000005719994078390300273895263671875
    },
    "last_point": {
        "ts": "2026-07-31T05:30:59+00:00",
        "lat": 35.1991799999999983583620632998645305633544921875,
        "lon": 129.2560882999999876119545660912990570068359375
    }
}
Methodology: 2026.01.18
Zone Dwell Gulf of Cádiz Sanctions Monitoring Zone
Jul 30, 2026 04:00 UTC 80.0%
  • Zone: Gulf of Cádiz Sanctions Monitoring Zone
  • Duration: 1h 3m
  • Data Points: 16 AIS positions
  • Period: 2026-07-30T04:00:38+00:00 to 2026-07-30T05:03:38+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_002",
    "zone_name": "Archipelago Sea Sanction Zone",
    "dwell_minutes": 63,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-07-30T04:00:38+00:00",
        "lat": 35.27195999999999997953636921010911464691162109375,
        "lon": 129.327706699999993134042597375810146331787109375
    },
    "last_point": {
        "ts": "2026-07-30T05:03:38+00:00",
        "lat": 35.18148000000000052978066378273069858551025390625,
        "lon": 129.24947670000000243817339651286602020263671875
    }
}
Methodology: 2026.01.18
Zone Dwell Gulf of Cádiz Sanctions Monitoring Zone
Jul 30, 2026 03:44 UTC 80.0%
  • Zone: Gulf of Cádiz Sanctions Monitoring Zone
  • Duration: 1h 19m
  • Data Points: 18 AIS positions
  • Period: 2026-07-30T03:44:18+00:00 to 2026-07-30T05:03:38+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_002",
    "zone_name": "Archipelago Sea Sanction Zone",
    "dwell_minutes": 79.2999999999999971578290569595992565155029296875,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-07-30T03:44:18+00:00",
        "lat": 35.2946917000000013331373338587582111358642578125,
        "lon": 129.343306699999999409556039609014987945556640625
    },
    "last_point": {
        "ts": "2026-07-30T05:03:38+00:00",
        "lat": 35.18148000000000052978066378273069858551025390625,
        "lon": 129.24947670000000243817339651286602020263671875
    }
}
Methodology: 2026.01.18
Ais Gap🛰️✗ Gulf of Cádiz Sanctions Monitoring Zone
Jul 29, 2026 21:18 UTC 70.0%
  • Gap Duration: 6h 25m
  • Last Seen: 2026-07-29T21:18:35+00:00 at 35.2969, 129.3491 (Zone: Gulf of Cádiz Sanctions Monitoring Zone)
  • Next Seen: 2026-07-30T03:44:18+00:00 at 35.2947, 129.3433

🛰️ 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: 2026-07-30T04:00:01.964689+00:00

Show Raw Evidence JSON
{
    "gap_minutes": 385.69999999999998863131622783839702606201171875,
    "last_seen": {
        "ts": "2026-07-29T21:18:35+00:00",
        "lat": 35.29688329999999751862560515291988849639892578125,
        "lon": 129.349148299999995970210875384509563446044921875,
        "sog": 10,
        "zone_id": "discovered_002"
    },
    "next_seen": {
        "ts": "2026-07-30T03:44:18+00:00",
        "lat": 35.2946917000000013331373338587582111358642578125,
        "lon": 129.343306699999999409556039609014987945556640625,
        "zone_ids": [
            "discovered_002"
        ]
    },
    "gap_enrichment": {
        "status": "not_found",
        "corridor": {
            "start": {
                "lat": 35.29688329999999751862560515291988849639892578125,
                "lon": 129.349148299999995970210875384509563446044921875,
                "ts": "2026-07-29T21:18:35+00:00"
            },
            "end": {
                "lat": 35.2946917000000013331373338587582111358642578125,
                "lon": 129.343306699999999409556039609014987945556640625,
                "ts": "2026-07-30T03:44:18+00:00"
            },
            "bbox": {
                "min_lat": 35.11451199999999772671799291856586933135986328125,
                "min_lon": 129.12254599999999982173903845250606536865234375,
                "max_lat": 35.4770630000000011250449460931122303009033203125,
                "max_lon": 129.56990899999999555802787654101848602294921875
            },
            "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": "2026-07-30T04:00:01.964689+00:00"
    }
}
Methodology: 2026.01.18
Zone Dwell Gulf of Cádiz Sanctions Monitoring Zone
Jul 29, 2026 21:18 UTC 80.0%
  • Zone: Gulf of Cádiz Sanctions Monitoring Zone
  • Duration: 6h 25m
  • Data Points: 2 AIS positions
  • Period: 2026-07-29T21:18:35+00:00 to 2026-07-30T03:44:18+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_002",
    "zone_name": "Archipelago Sea Sanction Zone",
    "dwell_minutes": 385.69999999999998863131622783839702606201171875,
    "points_in_zone": 2,
    "first_point": {
        "ts": "2026-07-29T21:18:35+00:00",
        "lat": 35.29688329999999751862560515291988849639892578125,
        "lon": 129.349148299999995970210875384509563446044921875
    },
    "last_point": {
        "ts": "2026-07-30T03:44:18+00:00",
        "lat": 35.2946917000000013331373338587582111358642578125,
        "lon": 129.343306699999999409556039609014987945556640625
    }
}
Methodology: 2026.01.18
Zone Dwell Gulf of Cádiz Sanctions Monitoring Zone
Jul 29, 2026 20:15 UTC 80.0%
  • Zone: Gulf of Cádiz Sanctions Monitoring Zone
  • Duration: 1h 3m
  • Data Points: 17 AIS positions
  • Period: 2026-07-29T20:15:14+00:00 to 2026-07-29T21:18:35+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_002",
    "zone_name": "Archipelago Sea Sanction Zone",
    "dwell_minutes": 63.39999999999999857891452847979962825775146484375,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-07-29T20:15:14+00:00",
        "lat": 35.17162499999999880628820392303168773651123046875,
        "lon": 129.248303300000003446257323957979679107666015625
    },
    "last_point": {
        "ts": "2026-07-29T21:18:35+00:00",
        "lat": 35.29688329999999751862560515291988849639892578125,
        "lon": 129.349148299999995970210875384509563446044921875
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 29, 2026 09:00 UTC 80.0%
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 35m
  • Data Points: 22 AIS positions
  • Period: 2026-07-29T09:00:30+00:00 to 2026-07-29T10:35:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 95,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-07-29T09:00:30+00:00",
        "lat": 35.02039500000000060708771343342959880828857421875,
        "lon": 129.017211699999990059950505383312702178955078125
    },
    "last_point": {
        "ts": "2026-07-29T10:35:32+00:00",
        "lat": 34.9842833000000013043973012827336788177490234375,
        "lon": 128.843963300000012850432540290057659149169921875
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 29, 2026 08:47 UTC 80.0%
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 47m
  • Data Points: 25 AIS positions
  • Period: 2026-07-29T08:47:40+00:00 to 2026-07-29T10:35:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 107.900000000000005684341886080801486968994140625,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-07-29T08:47:40+00:00",
        "lat": 35.029865000000000918589648790657520294189453125,
        "lon": 129.05410499999999274223227985203266143798828125
    },
    "last_point": {
        "ts": "2026-07-29T10:35:32+00:00",
        "lat": 34.9842833000000013043973012827336788177490234375,
        "lon": 128.843963300000012850432540290057659149169921875
    }
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 25, 2026 21:27 UTC 72/100
Vessel A: MMSI 440115430 (TAHITI) REPUBLIC OF KOREA
Vessel B: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
  • Minimum Distance: 36 meters
  • Average Distance: 63 meters
  • Duration: 39 minutes
  • Period: 2026-07-25T21:31:19+00:00 to 2026-07-25T22:10:21+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: 72/100

Moderate-confidence STS candidate. Two tankers (TAHITI and KUKDONG3HO) maintained close proximity (min 36m, avg 63m) for 39 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 36m, avg 63m
Duration5/25Duration 39 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±28m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440115430,
        "name": "TAHITI",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 36,
    "avg_distance_m": 62.7000000000000028421709430404007434844970703125,
    "distance_consistency_m": 27.60000000000000142108547152020037174224853515625,
    "duration_minutes": 39,
    "overlap_duration_s": 2342,
    "speed_a_avg": 0.330000000000000015543122344752191565930843353271484375,
    "speed_a_std": 0.450000000000000011102230246251565404236316680908203125,
    "speed_b_avg": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_b_std": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.330000000000000015543122344752191565930843353271484375,
            "max_sog": 1.5
        },
        "vessel_b": {
            "avg_sog": 0.2300000000000000099920072216264088638126850128173828125,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-07-25T21:31:19+00:00",
        "end": "2026-07-25T22:10:21+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 72,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 36m, avg 63m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 39 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b128m"
            },
            "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 (TAHITI and KUKDONG3HO) maintained close proximity (min 36m, avg 63m) for 39 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
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 25, 2026 21:01 UTC 80.0%
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 10m
  • Data Points: 20 AIS positions
  • Period: 2026-07-25T21:01:32+00:00 to 2026-07-25T22:12:12+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 70.7000000000000028421709430404007434844970703125,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-07-25T21:01:32+00:00",
        "lat": 35.009486699999996517362887971103191375732421875,
        "lon": 129.063881699999996044425643049180507659912109375
    },
    "last_point": {
        "ts": "2026-07-25T22:12:12+00:00",
        "lat": 35.029996699999998099883669055998325347900390625,
        "lon": 129.0813233000000082029146142303943634033203125
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 25, 2026 20:01 UTC 80.0%
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 2h 11m
  • Data Points: 36 AIS positions
  • Period: 2026-07-25T20:01:10+00:00 to 2026-07-25T22:12:12+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 131,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-07-25T20:01:10+00:00",
        "lat": 35.00961000000000211684891837649047374725341796875,
        "lon": 129.0636266999999861582182347774505615234375
    },
    "last_point": {
        "ts": "2026-07-25T22:12:12+00:00",
        "lat": 35.029996699999998099883669055998325347900390625,
        "lon": 129.0813233000000082029146142303943634033203125
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 25, 2026 20:01 UTC 75.0%
  • Duration: 2h 5m
  • Radius: 921 meters
  • Data Points: 35 AIS positions
  • Centroid: 35.0097, 129.0644
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 920.8999999999999772626324556767940521240234375,
    "duration_minutes": 125.900000000000005684341886080801486968994140625,
    "points": 35,
    "centroid": {
        "lat": 35.0096654714285620002556242980062961578369140625,
        "lon": 129.064442439999993439414538443088531494140625
    },
    "bbox": {
        "min_lat": 35.0091766999999975951141095720231533050537109375,
        "min_lon": 129.0636266999999861582182347774505615234375,
        "max_lat": 35.01628670000000198569978238083422183990478515625,
        "max_lon": 129.070526699999987840783433057367801666259765625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 25, 2026 19:01 UTC 80.0%
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 3h 11m
  • Data Points: 46 AIS positions
  • Period: 2026-07-25T19:01:00+00:00 to 2026-07-25T22:12:12+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 191.19999999999998863131622783839702606201171875,
    "points_in_zone": 46,
    "first_point": {
        "ts": "2026-07-25T19:01:00+00:00",
        "lat": 35.009313300000002300293999724090099334716796875,
        "lon": 129.063860000000005356923793442547321319580078125
    },
    "last_point": {
        "ts": "2026-07-25T22:12:12+00:00",
        "lat": 35.029996699999998099883669055998325347900390625,
        "lon": 129.0813233000000082029146142303943634033203125
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 25, 2026 19:01 UTC 75.0%
  • Duration: 3h 6m
  • Radius: 934 meters
  • Data Points: 45 AIS positions
  • Centroid: 35.0096, 129.0643
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 934,
    "duration_minutes": 186.099999999999994315658113919198513031005859375,
    "points": 45,
    "centroid": {
        "lat": 35.00962410666664936798042617738246917724609375,
        "lon": 129.064271900000022696985979564487934112548828125
    },
    "bbox": {
        "min_lat": 35.0091766999999975951141095720231533050537109375,
        "min_lon": 129.0635383000000047104549594223499298095703125,
        "max_lat": 35.01628670000000198569978238083422183990478515625,
        "max_lon": 129.070526699999987840783433057367801666259765625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 25, 2026 18:21 UTC 75.0%
  • Duration: 3h 46m
  • Radius: 938 meters
  • Data Points: 53 AIS positions
  • Centroid: 35.0096, 129.0642
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 937.8999999999999772626324556767940521240234375,
    "duration_minutes": 226.099999999999994315658113919198513031005859375,
    "points": 53,
    "centroid": {
        "lat": 35.00960729056601650199809228070080280303955078125,
        "lon": 129.06422834339622340849018655717372894287109375
    },
    "bbox": {
        "min_lat": 35.00759169999999897981979302130639553070068359375,
        "min_lon": 129.062905000000000654836185276508331298828125,
        "max_lat": 35.01628670000000198569978238083422183990478515625,
        "max_lon": 129.070526699999987840783433057367801666259765625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 25, 2026 18:13 UTC 80.0%
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 3h 58m
  • Data Points: 57 AIS positions
  • Period: 2026-07-25T18:13:19+00:00 to 2026-07-25T22:12:12+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 238.900000000000005684341886080801486968994140625,
    "points_in_zone": 57,
    "first_point": {
        "ts": "2026-07-25T18:13:19+00:00",
        "lat": 35.02719499999999896999725024215877056121826171875,
        "lon": 129.0793433000000050014932639896869659423828125
    },
    "last_point": {
        "ts": "2026-07-25T22:12:12+00:00",
        "lat": 35.029996699999998099883669055998325347900390625,
        "lon": 129.0813233000000082029146142303943634033203125
    }
}
Methodology: 2026.01.18
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 22, 2026 21:32 UTC 80.0%
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 4m
  • Data Points: 30 AIS positions
  • Period: 2026-07-22T21:32:24+00:00 to 2026-07-22T22:36:44+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 64.2999999999999971578290569595992565155029296875,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-07-22T21:32:24+00:00",
        "lat": 35.03020670000000080790414358489215373992919921875,
        "lon": 129.054941700000000537329469807446002960205078125
    },
    "last_point": {
        "ts": "2026-07-22T22:36:44+00:00",
        "lat": 34.986168300000002773231244646012783050537109375,
        "lon": 128.859016700000012178861652500927448272705078125
    }
}
Methodology: 2026.01.18
Zone Dwell Gulf of Cádiz Sanctions Monitoring Zone
Jul 22, 2026 07:22 UTC 80.0%
  • Zone: Gulf of Cádiz Sanctions Monitoring Zone
  • Duration: 1h 5m
  • Data Points: 35 AIS positions
  • Period: 2026-07-22T07:22:18+00:00 to 2026-07-22T08:27:19+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_002",
    "zone_name": "Archipelago Sea Sanction Zone",
    "dwell_minutes": 65,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-07-22T07:22:18+00:00",
        "lat": 35.306528299999996534097590483725070953369140625,
        "lon": 129.346215000000000827640178613364696502685546875
    },
    "last_point": {
        "ts": "2026-07-22T08:27:19+00:00",
        "lat": 35.1843649999999996680344338528811931610107421875,
        "lon": 129.245463300000011486190487630665302276611328125
    }
}
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 02:01 UTC 72/100
Vessel A: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
Vessel B: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
  • Minimum Distance: 54 meters
  • Average Distance: 60 meters
  • Duration: 30 minutes
  • Period: 2026-07-16T02:01:33+00:00 to 2026-07-16T02:31:53+00:00
  • Vessel A Avg Speed: 0.4 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 72/100

Moderate-confidence STS candidate. Two tankers (KUKDONG3HO and SUNGJIN ACE) maintained close proximity (min 54m, avg 60m) for 30 minutes. Both vessels were slow-moving (avg speeds 0.4 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 54m, avg 60m
Duration5/25Duration 30 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: 2026-07-16T08:45:12.149112+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440156960,
        "name": "SUNGJIN ACE",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 54.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 60.10000000000000142108547152020037174224853515625,
    "distance_consistency_m": 4.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 30.300000000000000710542735760100185871124267578125,
    "overlap_duration_s": 1820,
    "speed_a_avg": 0.440000000000000002220446049250313080847263336181640625,
    "speed_a_std": 0.450000000000000011102230246251565404236316680908203125,
    "speed_b_avg": 0.11999999999999999555910790149937383830547332763671875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.440000000000000002220446049250313080847263336181640625,
            "max_sog": 1.5
        },
        "vessel_b": {
            "avg_sog": 0.11999999999999999555910790149937383830547332763671875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-16T02:01:33+00:00",
        "end": "2026-07-16T02:31:53+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 72,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 54m, avg 60m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 30 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": "Moderate-confidence STS candidate. Two tankers (KUKDONG3HO and SUNGJIN ACE) maintained close proximity (min 54m, avg 60m) for 30 minutes. Both vessels were slow-moving (avg speeds 0.4 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": 35.02952959999999649198798579163849353790283203125,
            "lon": 129.07322149999998828207026235759258270263671875
        },
        "time_window": {
            "start_ts": "2026-07-16T02:01:33+00:00",
            "end_ts": "2026-07-16T02:31:53+00:00"
        },
        "searched_at": "2026-07-16T08:45:12.149112+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 01:22 UTC 79/100
Vessel A: MMSI 440156960 (SUNGJIN ACE) REPUBLIC OF KOREA
Vessel B: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
  • Minimum Distance: 55 meters
  • Average Distance: 66 meters
  • Duration: 1h 11m
  • Period: 2026-07-16T01:27:48+00:00 to 2026-07-16T02:39:29+00:00
  • Vessel A Avg Speed: 0.4 knots
  • Vessel B Avg Speed: 0.5 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 79/100

Moderate-confidence STS candidate. Two tankers (SUNGJIN ACE and KUKDONG3HO) maintained close proximity (min 55m, avg 66m) for 72 minutes. Both vessels were slow-moving (avg speeds 0.4 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 55m, avg 66m
Duration15/25Duration 72 minutes
Speed Stability14/20both nearly stationary; somewhat variable speeds
Distance Consistency15/15Distance variance ±14m
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": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 55.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 65.7000000000000028421709430404007434844970703125,
    "distance_consistency_m": 14.5,
    "duration_minutes": 71.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 4301,
    "speed_a_avg": 0.38000000000000000444089209850062616169452667236328125,
    "speed_a_std": 0.5300000000000000266453525910037569701671600341796875,
    "speed_b_avg": 0.4899999999999999911182158029987476766109466552734375,
    "speed_b_std": 0.479999999999999982236431605997495353221893310546875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.38000000000000000444089209850062616169452667236328125,
            "max_sog": 1.899999999999999911182158029987476766109466552734375
        },
        "vessel_b": {
            "avg_sog": 0.4899999999999999911182158029987476766109466552734375,
            "max_sog": 1.5
        }
    },
    "time_window": {
        "start": "2026-07-16T01:27:48+00:00",
        "end": "2026-07-16T02:39:29+00:00"
    },
    "points_count": {
        "vessel_a": 18,
        "vessel_b": 18
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 79,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 55m, avg 66m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 72 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b114m"
            },
            "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 (SUNGJIN ACE and KUKDONG3HO) maintained close proximity (min 55m, avg 66m) for 72 minutes. Both vessels were slow-moving (avg speeds 0.4 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."
    }
}
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 01:07 UTC 70/100
Vessel A: MMSI 440192560 (JINSUNG) REPUBLIC OF KOREA
Vessel B: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
  • Minimum Distance: 43 meters
  • Average Distance: 55 meters
  • Duration: 39 minutes
  • Period: 2026-07-16T01:07:05+00:00 to 2026-07-16T01:46:52+00:00
  • Vessel A Avg Speed: 0.5 knots
  • Vessel B Avg Speed: 0.3 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (JINSUNG and KUKDONG3HO) maintained close proximity (min 43m, avg 55m) for 40 minutes. Both vessels were slow-moving (avg speeds 0.5 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 43m, avg 55m
Duration5/25Duration 40 minutes
Speed Stability15/20both very slow; 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: 2026-07-16T07:45:08.950745+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440192560,
        "name": "JINSUNG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 42.89999999999999857891452847979962825775146484375,
    "avg_distance_m": 55.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 6,
    "duration_minutes": 39.7999999999999971578290569595992565155029296875,
    "overlap_duration_s": 2387,
    "speed_a_avg": 0.5100000000000000088817841970012523233890533447265625,
    "speed_a_std": 0.330000000000000015543122344752191565930843353271484375,
    "speed_b_avg": 0.2800000000000000266453525910037569701671600341796875,
    "speed_b_std": 0.190000000000000002220446049250313080847263336181640625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.5100000000000000088817841970012523233890533447265625,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0.2800000000000000266453525910037569701671600341796875,
            "max_sog": 0.59999999999999997779553950749686919152736663818359375
        }
    },
    "time_window": {
        "start": "2026-07-16T01:07:05+00:00",
        "end": "2026-07-16T01:46:52+00:00"
    },
    "points_count": {
        "vessel_a": 10,
        "vessel_b": 10
    },
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 43m, avg 55m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 40 minutes"
            },
            "speed_stability": {
                "score": 15,
                "max": 20,
                "detail": "both very slow; 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": "Moderate-confidence STS candidate. Two tankers (JINSUNG and KUKDONG3HO) maintained close proximity (min 43m, avg 55m) for 40 minutes. Both vessels were slow-moving (avg speeds 0.5 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": 35.02953480000000041627572500146925449371337890625,
            "lon": 129.072809400000011237352737225592136383056640625
        },
        "time_window": {
            "start_ts": "2026-07-16T01:07:05+00:00",
            "end_ts": "2026-07-16T01:46:52+00:00"
        },
        "searched_at": "2026-07-16T07:45:08.950745+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 01:06 UTC 80.0%
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 1h 25m
  • Data Points: 21 AIS positions
  • Period: 2026-07-16T01:06:13+00:00 to 2026-07-16T02:31:53+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 85.7000000000000028421709430404007434844970703125,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-07-16T01:06:13+00:00",
        "lat": 35.02976170000000166737663676030933856964111328125,
        "lon": 129.07225329999999985375325195491313934326171875
    },
    "last_point": {
        "ts": "2026-07-16T02:31:53+00:00",
        "lat": 35.02951329999999785513864480890333652496337890625,
        "lon": 129.07302329999998846687958575785160064697265625
    }
}
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 00:02 UTC 82/100
Vessel A: MMSI 440192560 (JINSUNG) REPUBLIC OF KOREA
Vessel B: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
  • Minimum Distance: 37 meters
  • Average Distance: 55 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: 0.3 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 82/100

High-confidence STS candidate. Two tankers (JINSUNG and KUKDONG3HO) maintained close proximity (min 37m, avg 55m) for 72 minutes. Both vessels were slow-moving (avg speeds 0.4 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 37m, avg 55m
Duration15/25Duration 72 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±8m
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": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 36.7999999999999971578290569595992565155029296875,
    "avg_distance_m": 54.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 7.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 72.5,
    "overlap_duration_s": 4348,
    "speed_a_avg": 0.38000000000000000444089209850062616169452667236328125,
    "speed_a_std": 0.330000000000000015543122344752191565930843353271484375,
    "speed_b_avg": 0.340000000000000024424906541753443889319896697998046875,
    "speed_b_std": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.38000000000000000444089209850062616169452667236328125,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0.340000000000000024424906541753443889319896697998046875,
            "max_sog": 0.6999999999999999555910790149937383830547332763671875
        }
    },
    "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 37m, avg 55m"
            },
            "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 \u00b18m"
            },
            "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 KUKDONG3HO) maintained close proximity (min 37m, avg 55m) for 72 minutes. Both vessels were slow-moving (avg speeds 0.4 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
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 16, 2026 00:00 UTC 80.0%
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 2h 31m
  • Data Points: 39 AIS positions
  • Period: 2026-07-16T00:00:42+00:00 to 2026-07-16T02:31:53+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 151.19999999999998863131622783839702606201171875,
    "points_in_zone": 39,
    "first_point": {
        "ts": "2026-07-16T00:00:42+00:00",
        "lat": 35.02948169999999805668267072178423404693603515625,
        "lon": 129.07288829999998824860085733234882354736328125
    },
    "last_point": {
        "ts": "2026-07-16T02:31:53+00:00",
        "lat": 35.02951329999999785513864480890333652496337890625,
        "lon": 129.07302329999998846687958575785160064697265625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 16, 2026 00:00 UTC 75.0%
  • Duration: 2h 31m
  • Radius: 49 meters
  • Data Points: 39 AIS positions
  • Centroid: 35.0296, 129.0728
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 48.7000000000000028421709430404007434844970703125,
    "duration_minutes": 151.19999999999998863131622783839702606201171875,
    "points": 39,
    "centroid": {
        "lat": 35.02960893846153567210421897470951080322265625,
        "lon": 129.072753410256410688816686160862445831298828125
    },
    "bbox": {
        "min_lat": 35.02938329999999922392817097716033458709716796875,
        "min_lon": 129.07225329999999985375325195491313934326171875,
        "max_lat": 35.02979500000000001591615728102624416351318359375,
        "max_lon": 129.073074999999988676790962927043437957763671875
    },
    "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: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
  • Minimum Distance: 34 meters
  • Average Distance: 53 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: 0.3 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (JINSUNG and KUKDONG3HO) maintained close proximity (min 34m, avg 53m) for 151 minutes. Both vessels were slow-moving (avg speeds 0.3 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 34m, avg 53m
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: 2026-07-16T05:45:04.233612+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440192560,
        "name": "JINSUNG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 34.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 53.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 7.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 150.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 9047,
    "speed_a_avg": 0.309999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.270000000000000017763568394002504646778106689453125,
    "speed_b_avg": 0.309999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.2399999999999999911182158029987476766109466552734375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.309999999999999997779553950749686919152736663818359375,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0.309999999999999997779553950749686919152736663818359375,
            "max_sog": 1
        }
    },
    "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 34m, avg 53m"
            },
            "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 KUKDONG3HO) maintained close proximity (min 34m, avg 53m) for 151 minutes. Both vessels were slow-moving (avg speeds 0.3 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": 35.02939549999999968576958053745329380035400390625,
            "lon": 129.07292929999999842038960196077823638916015625
        },
        "time_window": {
            "start_ts": "2026-07-15T23:16:05+00:00",
            "end_ts": "2026-07-16T01:46:52+00:00"
        },
        "searched_at": "2026-07-16T05:45:04.233612+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 23:02 UTC 80.0%
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 3h 29m
  • Data Points: 52 AIS positions
  • Period: 2026-07-15T23:02:52+00:00 to 2026-07-16T02:31:53+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 209,
    "points_in_zone": 52,
    "first_point": {
        "ts": "2026-07-15T23:02:52+00:00",
        "lat": 35.02961169999999668789314455352723598480224609375,
        "lon": 129.072546700000003738750820048153400421142578125
    },
    "last_point": {
        "ts": "2026-07-16T02:31:53+00:00",
        "lat": 35.02951329999999785513864480890333652496337890625,
        "lon": 129.07302329999998846687958575785160064697265625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 15, 2026 23:02 UTC 75.0%
  • Duration: 3h 29m
  • Radius: 53 meters
  • Data Points: 52 AIS positions
  • Centroid: 35.0296, 129.0728
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 52.89999999999999857891452847979962825775146484375,
    "duration_minutes": 209,
    "points": 52,
    "centroid": {
        "lat": 35.02957801923076175398819032125174999237060546875,
        "lon": 129.0727877519231014957767911255359649658203125
    },
    "bbox": {
        "min_lat": 35.029283300000003009699867106974124908447265625,
        "min_lon": 129.07225329999999985375325195491313934326171875,
        "max_lat": 35.02979500000000001591615728102624416351318359375,
        "max_lon": 129.07311329999998861239873804152011871337890625
    },
    "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: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
  • Minimum Distance: 34 meters
  • Average Distance: 53 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: 0.3 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (JINSUNG and KUKDONG3HO) maintained close proximity (min 34m, avg 53m) for 218 minutes. Both vessels were slow-moving (avg speeds 0.3 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 34m, avg 53m
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: 2026-07-16T04:45:04.648112+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 440192560,
        "name": "JINSUNG",
        "flag": "REPUBLIC OF KOREA"
    },
    "vessel_b": {
        "mmsi": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 34.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 52.60000000000000142108547152020037174224853515625,
    "distance_consistency_m": 6.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 218.5,
    "overlap_duration_s": 13109,
    "speed_a_avg": 0.309999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.2399999999999999911182158029987476766109466552734375,
    "speed_b_avg": 0.299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.309999999999999997779553950749686919152736663818359375,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0.299999999999999988897769753748434595763683319091796875,
            "max_sog": 1
        }
    },
    "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 34m, avg 53m"
            },
            "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 KUKDONG3HO) maintained close proximity (min 34m, avg 53m) for 218 minutes. Both vessels were slow-moving (avg speeds 0.3 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": 35.029413599999998041312210261821746826171875,
            "lon": 129.07284789999999929932528175413608551025390625
        },
        "time_window": {
            "start_ts": "2026-07-15T22:08:23+00:00",
            "end_ts": "2026-07-16T01:46:52+00:00"
        },
        "searched_at": "2026-07-16T04:45:04.648112+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 22:06 UTC 80.0%
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 4h 24m
  • Data Points: 67 AIS positions
  • Period: 2026-07-15T22:06:59+00:00 to 2026-07-16T02:31:53+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 264.8999999999999772626324556767940521240234375,
    "points_in_zone": 67,
    "first_point": {
        "ts": "2026-07-15T22:06:59+00:00",
        "lat": 35.0296282999999988305717124603688716888427734375,
        "lon": 129.07246670000000676736817695200443267822265625
    },
    "last_point": {
        "ts": "2026-07-16T02:31:53+00:00",
        "lat": 35.02951329999999785513864480890333652496337890625,
        "lon": 129.07302329999998846687958575785160064697265625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 15, 2026 22:06 UTC 75.0%
  • Duration: 4h 24m
  • Radius: 50 meters
  • Data Points: 67 AIS positions
  • Centroid: 35.0296, 129.0727
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 49.89999999999999857891452847979962825775146484375,
    "duration_minutes": 264.8999999999999772626324556767940521240234375,
    "points": 67,
    "centroid": {
        "lat": 35.02959062388060118564681033603847026824951171875,
        "lon": 129.072709249253790630973526276648044586181640625
    },
    "bbox": {
        "min_lat": 35.029283300000003009699867106974124908447265625,
        "min_lon": 129.07225329999999985375325195491313934326171875,
        "max_lat": 35.02979500000000001591615728102624416351318359375,
        "max_lon": 129.07311329999998861239873804152011871337890625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18
Sts Strait of Gibraltar Surveillance Zone
Jul 15, 2026 21:40 UTC 95/100
Vessel A: MMSI 440192560 (JINSUNG) REPUBLIC OF KOREA
Vessel B: MMSI 440112380 (KUKDONG3HO) REPUBLIC OF KOREA
  • Minimum Distance: 34 meters
  • Average Distance: 53 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: 0.3 knots
  • Zone: Strait of Gibraltar Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (JINSUNG and KUKDONG3HO) maintained close proximity (min 34m, avg 53m) for 244 minutes. Both vessels were slow-moving (avg speeds 0.3 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 34m, avg 53m
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": 440112380,
        "name": "KUKDONG3HO",
        "flag": "REPUBLIC OF KOREA"
    },
    "min_distance_m": 34.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 53.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 7.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 244.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 14643,
    "speed_a_avg": 0.330000000000000015543122344752191565930843353271484375,
    "speed_a_std": 0.289999999999999980015985556747182272374629974365234375,
    "speed_b_avg": 0.2800000000000000266453525910037569701671600341796875,
    "speed_b_std": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.330000000000000015543122344752191565930843353271484375,
            "max_sog": 1.5
        },
        "vessel_b": {
            "avg_sog": 0.2800000000000000266453525910037569701671600341796875,
            "max_sog": 1
        }
    },
    "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 34m, avg 53m"
            },
            "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 KUKDONG3HO) maintained close proximity (min 34m, avg 53m) for 244 minutes. Both vessels were slow-moving (avg speeds 0.3 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 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
Zone Dwell Strait of Gibraltar Surveillance Zone
Jul 15, 2026 21:15 UTC 80.0%
  • Zone: Strait of Gibraltar Surveillance Zone
  • Duration: 5h 16m
  • Data Points: 77 AIS positions
  • Period: 2026-07-15T21:15:50+00:00 to 2026-07-16T02:31:53+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_001",
    "zone_name": "Strait of Gibraltar Surveillance Zone",
    "dwell_minutes": 316.1000000000000227373675443232059478759765625,
    "points_in_zone": 77,
    "first_point": {
        "ts": "2026-07-15T21:15:50+00:00",
        "lat": 35.0299432999999993398887454532086849212646484375,
        "lon": 129.06586329999998952189343981444835662841796875
    },
    "last_point": {
        "ts": "2026-07-16T02:31:53+00:00",
        "lat": 35.02951329999999785513864480890333652496337890625,
        "lon": 129.07302329999998846687958575785160064697265625
    }
}
Methodology: 2026.01.18
Loiter Strait of Gibraltar Surveillance Zone
Jul 15, 2026 21:15 UTC 75.0%
  • Duration: 5h 16m
  • Radius: 879 meters
  • Data Points: 77 AIS positions
  • Centroid: 35.0295, 129.0723
  • Zone: Strait of Gibraltar Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 878.6000000000000227373675443232059478759765625,
    "duration_minutes": 316.1000000000000227373675443232059478759765625,
    "points": 77,
    "centroid": {
        "lat": 35.0295187662337781375754275359213352203369140625,
        "lon": 129.072310081818187654789653606712818145751953125
    },
    "bbox": {
        "min_lat": 35.02673829999999810524968779645860195159912109375,
        "min_lon": 129.062886700000007067501428537070751190185546875,
        "max_lat": 35.0299432999999993398887454532086849212646484375,
        "max_lon": 129.07311329999998861239873804152011871337890625
    },
    "zone_id": "discovered_001"
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Jul 31 22:55 35.0095 129.0648 0.4 kn 88.2° Strait of Gibraltar Surveillance Zone
Jul 31 22:53 35.0095 129.0647 0.4 kn 145.2° Strait of Gibraltar Surveillance Zone
Jul 31 22:49 35.0095 129.0645 0.0 kn 92.4° Strait of Gibraltar Surveillance Zone
Jul 31 22:47 35.0095 129.0644 0.0 kn 138.1° Strait of Gibraltar Surveillance Zone
Jul 31 22:43 35.0095 129.0643 0.1 kn 155.8° Strait of Gibraltar Surveillance Zone
Jul 31 22:38 35.0095 129.0643 0.2 kn 297.7° Strait of Gibraltar Surveillance Zone
Jul 31 22:36 35.0095 129.0643 0.1 kn 282.8° Strait of Gibraltar Surveillance Zone
Jul 31 22:33 35.0095 129.0643 0.1 kn 270.2° Strait of Gibraltar Surveillance Zone
Jul 31 22:29 35.0095 129.0645 0.0 kn 266.1° Strait of Gibraltar Surveillance Zone
Jul 31 22:26 35.0095 129.0644 0.0 kn 96.0° Strait of Gibraltar Surveillance Zone
Jul 31 22:18 35.0094 129.0640 0.3 kn 63.3° Strait of Gibraltar Surveillance Zone
Jul 31 22:16 35.0093 129.0637 0.3 kn 69.7° Strait of Gibraltar Surveillance Zone
Jul 31 22:06 35.0094 129.0645 1.1 kn 310.6° Strait of Gibraltar Surveillance Zone
Jul 31 21:53 35.0059 129.0663 0.3 kn 343.2° Strait of Gibraltar Surveillance Zone
Jul 31 21:48 35.0053 129.0666 0.3 kn 266.8° Strait of Gibraltar Surveillance Zone
Jul 31 21:41 35.0053 129.0669 0.2 kn 275.4° Strait of Gibraltar Surveillance Zone
Jul 31 21:38 35.0052 129.0669 0.2 kn 288.4° Strait of Gibraltar Surveillance Zone
Jul 31 21:36 35.0052 129.0670 0.3 kn 359.0° Strait of Gibraltar Surveillance Zone
Jul 31 21:27 35.0052 129.0666 0.6 kn 319.2° Strait of Gibraltar Surveillance Zone
Jul 31 21:23 35.0053 129.0662 1.2 kn 129.2° 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.