HISTRIA TIGER

IMO 9396335

Vessel information

Vessel Name HISTRIA TIGER
IMO Number 9396335
MMSI 636013848
Vessel Type Tanker
Flag 🇱🇷 LIBERIA
Call Sign A8PW3
Length 180 m
Beam 32 m

Detected Events (100)

Zone Dwell Central Atlantic Monitoring Zone
Oct 26, 2026 13:26 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 4h 19m
  • Data Points: 3 AIS positions
  • Period: 2026-10-26T13:26:11+00:00 to 2026-10-26T17:45:13+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 259,
    "points_in_zone": 3,
    "first_point": {
        "ts": "2026-10-26T13:26:11+00:00",
        "lat": 35.1766367000000030884621082805097103118896484375,
        "lon": 35.894436699999999973442754708230495452880859375
    },
    "last_point": {
        "ts": "2026-10-26T17:45:13+00:00",
        "lat": 35.17685829999999924666553852148354053497314453125,
        "lon": 35.8940266999999977315383148379623889923095703125
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 26, 2026 09:56 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 3h 30m
  • Data Points: 2 AIS positions
  • Period: 2026-10-26T09:56:11+00:00 to 2026-10-26T13:26:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 210,
    "points_in_zone": 2,
    "first_point": {
        "ts": "2026-10-26T09:56:11+00:00",
        "lat": 35.17655830000000349855326930992305278778076171875,
        "lon": 35.89328830000000181144059752114117145538330078125
    },
    "last_point": {
        "ts": "2026-10-26T13:26:11+00:00",
        "lat": 35.1766367000000030884621082805097103118896484375,
        "lon": 35.894436699999999973442754708230495452880859375
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 26, 2026 08:38 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 4h 48m
  • Data Points: 3 AIS positions
  • Period: 2026-10-26T08:38:12+00:00 to 2026-10-26T13:26:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 288,
    "points_in_zone": 3,
    "first_point": {
        "ts": "2026-10-26T08:38:12+00:00",
        "lat": 35.17655500000000046156856114976108074188232421875,
        "lon": 35.8933032999999994672180037014186382293701171875
    },
    "last_point": {
        "ts": "2026-10-26T13:26:11+00:00",
        "lat": 35.1766367000000030884621082805097103118896484375,
        "lon": 35.894436699999999973442754708230495452880859375
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 26, 2026 06:14 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 3h 42m
  • Data Points: 8 AIS positions
  • Period: 2026-10-26T06:14:12+00:00 to 2026-10-26T09:56:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 222,
    "points_in_zone": 8,
    "first_point": {
        "ts": "2026-10-26T06:14:12+00:00",
        "lat": 35.17700669999999973924786900170147418975830078125,
        "lon": 35.89217500000000171667124959640204906463623046875
    },
    "last_point": {
        "ts": "2026-10-26T09:56:11+00:00",
        "lat": 35.17655830000000349855326930992305278778076171875,
        "lon": 35.89328830000000181144059752114117145538330078125
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 26, 2026 05:14 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 4h 42m
  • Data Points: 9 AIS positions
  • Period: 2026-10-26T05:14:12+00:00 to 2026-10-26T09:56:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 282,
    "points_in_zone": 9,
    "first_point": {
        "ts": "2026-10-26T05:14:12+00:00",
        "lat": 35.1768550000000033151081879623234272003173828125,
        "lon": 35.892771699999997281338437460362911224365234375
    },
    "last_point": {
        "ts": "2026-10-26T09:56:11+00:00",
        "lat": 35.17655830000000349855326930992305278778076171875,
        "lon": 35.89328830000000181144059752114117145538330078125
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 26, 2026 00:08 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 20m
  • Data Points: 8 AIS positions
  • Period: 2026-10-26T00:23:16+00:00 to 2026-10-26T06:44:13+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 380.8999999999999772626324556767940521240234375,
    "points_in_zone": 8,
    "first_point": {
        "ts": "2026-10-26T00:23:16+00:00",
        "lat": 35.17653829999999715028025093488395214080810546875,
        "lon": 35.89278999999999797410055180080235004425048828125
    },
    "last_point": {
        "ts": "2026-10-26T06:44:13+00:00",
        "lat": 35.17695330000000097925294539891183376312255859375,
        "lon": 35.89226169999999882520569371990859508514404296875
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 23:11 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 29m
  • Data Points: 6 AIS positions
  • Period: 2026-10-25T23:50:14+00:00 to 2026-10-26T06:20:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 389.8999999999999772626324556767940521240234375,
    "points_in_zone": 6,
    "first_point": {
        "ts": "2026-10-25T23:50:14+00:00",
        "lat": 35.17676000000000158252078108489513397216796875,
        "lon": 35.8925033000000013316821423359215259552001953125
    },
    "last_point": {
        "ts": "2026-10-26T06:20:11+00:00",
        "lat": 35.1770250000000004320099833421409130096435546875,
        "lon": 35.89216830000000157951944856904447078704833984375
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 22:05 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 32m
  • Data Points: 13 AIS positions
  • Period: 2026-10-25T22:41:16+00:00 to 2026-10-26T05:14:12+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 392.8999999999999772626324556767940521240234375,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-10-25T22:41:16+00:00",
        "lat": 35.177328299999999217106960713863372802734375,
        "lon": 35.8918182999999970661519910208880901336669921875
    },
    "last_point": {
        "ts": "2026-10-26T05:14:12+00:00",
        "lat": 35.1768550000000033151081879623234272003173828125,
        "lon": 35.892771699999997281338437460362911224365234375
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 22:05 UTC 75.0% ▼
  • Duration: 6h 32m
  • Radius: 71 meters
  • Data Points: 13 AIS positions
  • Centroid: 35.1769, 35.8924
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 71.2000000000000028421709430404007434844970703125,
    "duration_minutes": 392.8999999999999772626324556767940521240234375,
    "points": 13,
    "centroid": {
        "lat": 35.1768722999999994272002368234097957611083984375,
        "lon": 35.89236756923076399061756092123687267303466796875
    },
    "bbox": {
        "min_lat": 35.17653829999999715028025093488395214080810546875,
        "min_lon": 35.8918182999999970661519910208880901336669921875,
        "max_lat": 35.177328299999999217106960713863372802734375,
        "max_lon": 35.89278999999999797410055180080235004425048828125
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 21:41 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 2h 42m
  • Data Points: 21 AIS positions
  • Period: 2026-10-25T21:41:13+00:00 to 2026-10-26T00:23:16+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 162.099999999999994315658113919198513031005859375,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-10-25T21:41:13+00:00",
        "lat": 35.17734999999999701003616792149841785430908203125,
        "lon": 35.891891700000002174419932998716831207275390625
    },
    "last_point": {
        "ts": "2026-10-26T00:23:16+00:00",
        "lat": 35.17653829999999715028025093488395214080810546875,
        "lon": 35.89278999999999797410055180080235004425048828125
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 21:41 UTC 75.0% ▼
  • Duration: 2h 42m
  • Radius: 92 meters
  • Data Points: 21 AIS positions
  • Centroid: 35.1772, 35.8921
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 92,
    "duration_minutes": 162.099999999999994315658113919198513031005859375,
    "points": 21,
    "centroid": {
        "lat": 35.17716348571428852665121667087078094482421875,
        "lon": 35.8921258809523777699723723344504833221435546875
    },
    "bbox": {
        "min_lat": 35.17653829999999715028025093488395214080810546875,
        "min_lon": 35.89181169999999809760993230156600475311279296875,
        "max_lat": 35.17766499999999751935320091433823108673095703125,
        "max_lon": 35.89278999999999797410055180080235004425048828125
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Sts Central Atlantic Monitoring Zone
Oct 25, 2026 20:17 UTC 65/100 ▼
Vessel A: IMO 9396335 (HISTRIA TIGER) LIBERIA
Vessel B: IMO 9288772 (DIDIMON) Liberia
  • Minimum Distance: 444 meters
  • Average Distance: 459 meters
  • Duration: 1h 27m
  • Period: 2026-10-25T20:17:15+00:00 to 2026-10-25T21:44:17+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (HISTRIA TIGER and DIDIMON) maintained close proximity (min 444m, avg 459m) for 87 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 444m, avg 459m
Duration15/25Duration 87 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±19m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "min_distance_m": 444.1000000000000227373675443232059478759765625,
    "avg_distance_m": 459.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 18.89999999999999857891452847979962825775146484375,
    "duration_minutes": 87,
    "overlap_duration_s": 5222,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-25T20:17:15+00:00",
        "end": "2026-10-25T21:44:17+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 444m, avg 459m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 87 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b119m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (HISTRIA TIGER and DIDIMON) maintained close proximity (min 444m, avg 459m) for 87 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 20:11 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 4h 12m
  • Data Points: 29 AIS positions
  • Period: 2026-10-25T20:11:13+00:00 to 2026-10-26T00:23:16+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 252.099999999999994315658113919198513031005859375,
    "points_in_zone": 29,
    "first_point": {
        "ts": "2026-10-25T20:11:13+00:00",
        "lat": 35.176698299999998198472894728183746337890625,
        "lon": 35.8932317000000011830707080662250518798828125
    },
    "last_point": {
        "ts": "2026-10-26T00:23:16+00:00",
        "lat": 35.17653829999999715028025093488395214080810546875,
        "lon": 35.89278999999999797410055180080235004425048828125
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 20:11 UTC 75.0% ▼
  • Duration: 4h 12m
  • Radius: 88 meters
  • Data Points: 29 AIS positions
  • Centroid: 35.1770, 35.8924
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 88.2999999999999971578290569595992565155029296875,
    "duration_minutes": 252.099999999999994315658113919198513031005859375,
    "points": 29,
    "centroid": {
        "lat": 35.1770439620689643334117135964334011077880859375,
        "lon": 35.8924320172413757745744078420102596282958984375
    },
    "bbox": {
        "min_lat": 35.17653829999999715028025093488395214080810546875,
        "min_lon": 35.89181169999999809760993230156600475311279296875,
        "max_lat": 35.17766499999999751935320091433823108673095703125,
        "max_lon": 35.89328499999999877445588936097919940948486328125
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Sts🛰️✗ Central Atlantic Monitoring Zone
Oct 25, 2026 19:51 UTC 65/100 ▼
Vessel A: IMO 9288772 (DIDIMON) Liberia
Vessel B: IMO 9396335 (HISTRIA TIGER) LIBERIA
  • Minimum Distance: 444 meters
  • Average Distance: 452 meters
  • Duration: 1h 3m
  • Period: 2026-10-25T19:51:55+00:00 to 2026-10-25T20:54:55+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 444m, avg 452m) for 63 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 444m, avg 452m
Duration15/25Duration 63 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±10m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-25T21:45:02.166181+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 444.1000000000000227373675443232059478759765625,
    "avg_distance_m": 451.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 9.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 63,
    "overlap_duration_s": 3780,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-25T19:51:55+00:00",
        "end": "2026-10-25T20:54:55+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 444m, avg 452m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 63 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 444m, avg 452m) for 63 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.17872369999999904166543274186551570892333984375,
            "lon": 35.8938801999999981262590154074132442474365234375
        },
        "time_window": {
            "start_ts": "2026-10-25T19:51:55+00:00",
            "end_ts": "2026-10-25T20:54:55+00:00"
        },
        "searched_at": "2026-10-25T21:45:02.166181+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 19:32 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 4h 51m
  • Data Points: 33 AIS positions
  • Period: 2026-10-25T19:32:13+00:00 to 2026-10-26T00:23:16+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 291.1000000000000227373675443232059478759765625,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-10-25T19:32:13+00:00",
        "lat": 35.1767167000000000598447513766586780548095703125,
        "lon": 35.89347670000000078971424954943358898162841796875
    },
    "last_point": {
        "ts": "2026-10-26T00:23:16+00:00",
        "lat": 35.17653829999999715028025093488395214080810546875,
        "lon": 35.89278999999999797410055180080235004425048828125
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 19:32 UTC 75.0% ▼
  • Duration: 4h 51m
  • Radius: 98 meters
  • Data Points: 33 AIS positions
  • Centroid: 35.1770, 35.8926
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 98.400000000000005684341886080801486968994140625,
    "duration_minutes": 291.1000000000000227373675443232059478759765625,
    "points": 33,
    "centroid": {
        "lat": 35.177003581818183874929673038423061370849609375,
        "lon": 35.89255798484848725138363079167902469635009765625
    },
    "bbox": {
        "min_lat": 35.17653829999999715028025093488395214080810546875,
        "min_lon": 35.89181169999999809760993230156600475311279296875,
        "max_lat": 35.17766499999999751935320091433823108673095703125,
        "max_lon": 35.89348830000000134532456286251544952392578125
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 18:50 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 5h 33m
  • Data Points: 34 AIS positions
  • Period: 2026-10-25T18:50:16+00:00 to 2026-10-26T00:23:16+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 333,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-10-25T18:50:16+00:00",
        "lat": 35.176766700000001719672582112252712249755859375,
        "lon": 35.89356169999999934816514723934233188629150390625
    },
    "last_point": {
        "ts": "2026-10-26T00:23:16+00:00",
        "lat": 35.17653829999999715028025093488395214080810546875,
        "lon": 35.89278999999999797410055180080235004425048828125
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 18:50 UTC 75.0% ▼
  • Duration: 5h 33m
  • Radius: 101 meters
  • Data Points: 34 AIS positions
  • Centroid: 35.1770, 35.8926
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 100.7999999999999971578290569595992565155029296875,
    "duration_minutes": 333,
    "points": 34,
    "centroid": {
        "lat": 35.17699661470587813028032542206346988677978515625,
        "lon": 35.8925875058823606877922429703176021575927734375
    },
    "bbox": {
        "min_lat": 35.17653829999999715028025093488395214080810546875,
        "min_lon": 35.89181169999999809760993230156600475311279296875,
        "max_lat": 35.17766499999999751935320091433823108673095703125,
        "max_lon": 35.89356169999999934816514723934233188629150390625
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 17:50 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 33m
  • Data Points: 35 AIS positions
  • Period: 2026-10-25T17:50:15+00:00 to 2026-10-26T00:23:16+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-10-25T17:50:15+00:00",
        "lat": 35.17659669999999749734342913143336772918701171875,
        "lon": 35.89323999999999870169631321914494037628173828125
    },
    "last_point": {
        "ts": "2026-10-26T00:23:16+00:00",
        "lat": 35.17653829999999715028025093488395214080810546875,
        "lon": 35.89278999999999797410055180080235004425048828125
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 17:50 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 103 meters
  • Data Points: 35 AIS positions
  • Centroid: 35.1770, 35.8926
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 102.900000000000005684341886080801486968994140625,
    "duration_minutes": 393,
    "points": 35,
    "centroid": {
        "lat": 35.1769851885714359696066821925342082977294921875,
        "lon": 35.89260614857142428490988095290958881378173828125
    },
    "bbox": {
        "min_lat": 35.17653829999999715028025093488395214080810546875,
        "min_lon": 35.89181169999999809760993230156600475311279296875,
        "max_lat": 35.17766499999999751935320091433823108673095703125,
        "max_lon": 35.89356169999999934816514723934233188629150390625
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Sts🛰️✗ Central Atlantic Monitoring Zone
Oct 25, 2026 15:00 UTC 75/100 ▼
Vessel A: IMO 9288772 (DIDIMON) Liberia
Vessel B: IMO 9396335 (HISTRIA TIGER) LIBERIA
  • Minimum Distance: 445 meters
  • Average Distance: 455 meters
  • Duration: 5h 54m
  • Period: 2026-10-25T15:00:53+00:00 to 2026-10-25T20:54:55+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 445m, avg 455m) for 354 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 445m, avg 455m
Duration25/25Duration 354 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-25T21:15:03.734319+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 445.19999999999998863131622783839702606201171875,
    "avg_distance_m": 454.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 9.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 354,
    "overlap_duration_s": 21242,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-25T15:00:53+00:00",
        "end": "2026-10-25T20:54:55+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 445m, avg 455m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 354 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 445m, avg 455m) for 354 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.17866500000000229420038522221148014068603515625,
            "lon": 35.89396359999999930323610897175967693328857421875
        },
        "time_window": {
            "start_ts": "2026-10-25T15:00:53+00:00",
            "end_ts": "2026-10-25T20:54:55+00:00"
        },
        "searched_at": "2026-10-25T21:15:03.734319+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Central Atlantic Monitoring Zone
Oct 25, 2026 14:06 UTC 60/100 ▼
Vessel A: IMO 9288772 (DIDIMON) Liberia
Vessel B: IMO 9396335 (HISTRIA TIGER) LIBERIA
  • Minimum Distance: 456 meters
  • Average Distance: 461 meters
  • Duration: 54 minutes
  • Period: 2026-10-25T14:06:52+00:00 to 2026-10-25T15:00:53+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 456m, avg 461m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 456m, avg 461m
Duration10/25Duration 54 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-25T19:15:01.847144+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 456.1000000000000227373675443232059478759765625,
    "avg_distance_m": 460.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 4.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 54,
    "overlap_duration_s": 3241,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T14:06:52+00:00",
        "end": "2026-10-25T15:00:53+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 456m, avg 461m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 54 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 456m, avg 461m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.1783731000000017274942365474998950958251953125,
            "lon": 35.89433840000000230929799727164208889007568359375
        },
        "time_window": {
            "start_ts": "2026-10-25T14:06:52+00:00",
            "end_ts": "2026-10-25T15:00:53+00:00"
        },
        "searched_at": "2026-10-25T19:15:01.847144+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 14:05 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 21m
  • Data Points: 17 AIS positions
  • Period: 2026-10-25T14:35:12+00:00 to 2026-10-25T20:56:17+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 381.1000000000000227373675443232059478759765625,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-10-25T14:35:12+00:00",
        "lat": 35.1763882999999992762241163291037082672119140625,
        "lon": 35.89367829999999770507201901637017726898193359375
    },
    "last_point": {
        "ts": "2026-10-25T20:56:17+00:00",
        "lat": 35.17686499999999938381733954884111881256103515625,
        "lon": 35.89314329999999841902535990811884403228759765625
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 14:05 UTC 75.0% ▼
  • Duration: 6h 21m
  • Radius: 40 meters
  • Data Points: 17 AIS positions
  • Centroid: 35.1767, 35.8934
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 40.2999999999999971578290569595992565155029296875,
    "duration_minutes": 381.1000000000000227373675443232059478759765625,
    "points": 17,
    "centroid": {
        "lat": 35.17665980588235896675541880540549755096435546875,
        "lon": 35.89338431176469867978084948845207691192626953125
    },
    "bbox": {
        "min_lat": 35.17638500000000334466676576994359493255615234375,
        "min_lon": 35.89314329999999841902535990811884403228759765625,
        "max_lat": 35.17686499999999938381733954884111881256103515625,
        "max_lon": 35.89367829999999770507201901637017726898193359375
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 12:08 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 21m
  • Data Points: 9 AIS positions
  • Period: 2026-10-25T12:29:12+00:00 to 2026-10-25T18:50:16+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 381.1000000000000227373675443232059478759765625,
    "points_in_zone": 9,
    "first_point": {
        "ts": "2026-10-25T12:29:12+00:00",
        "lat": 35.17649829999999866458892938680946826934814453125,
        "lon": 35.89324830000000332574927597306668758392333984375
    },
    "last_point": {
        "ts": "2026-10-25T18:50:16+00:00",
        "lat": 35.176766700000001719672582112252712249755859375,
        "lon": 35.89356169999999934816514723934233188629150390625
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 12:08 UTC 75.0% ▼
  • Duration: 5h 42m
  • Radius: 26 meters
  • Data Points: 11 AIS positions
  • Centroid: 35.1765, 35.8934
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 26.199999999999999289457264239899814128875732421875,
    "duration_minutes": 342.1000000000000227373675443232059478759765625,
    "points": 11,
    "centroid": {
        "lat": 35.17645666363636536289050127379596233367919921875,
        "lon": 35.8934031636363641837306204251945018768310546875
    },
    "bbox": {
        "min_lat": 35.17636999999999858346200198866426944732666015625,
        "min_lon": 35.89315830000000318023012368939816951751708984375,
        "max_lat": 35.17659669999999749734342913143336772918701171875,
        "max_lon": 35.89367829999999770507201901637017726898193359375
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Sts Central Atlantic Monitoring Zone
Oct 25, 2026 11:27 UTC 75/100 ▼
Vessel A: IMO 9288772 (DIDIMON) Liberia
Vessel B: IMO 9396335 (HISTRIA TIGER) LIBERIA
  • Minimum Distance: 456 meters
  • Average Distance: 464 meters
  • Duration: 3h 21m
  • Period: 2026-10-25T11:39:55+00:00 to 2026-10-25T15:00:53+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 456m, avg 464m) for 201 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 456m, avg 464m
Duration25/25Duration 201 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 456.1000000000000227373675443232059478759765625,
    "avg_distance_m": 463.5,
    "distance_consistency_m": 5.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 201,
    "overlap_duration_s": 12058,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T11:39:55+00:00",
        "end": "2026-10-25T15:00:53+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 456m, avg 464m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 201 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 456m, avg 464m) for 201 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 11:17 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 21m
  • Data Points: 14 AIS positions
  • Period: 2026-10-25T11:29:10+00:00 to 2026-10-25T17:50:15+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 381.1000000000000227373675443232059478759765625,
    "points_in_zone": 14,
    "first_point": {
        "ts": "2026-10-25T11:29:10+00:00",
        "lat": 35.17642169999999879337337915785610675811767578125,
        "lon": 35.893225000000001045918907038867473602294921875
    },
    "last_point": {
        "ts": "2026-10-25T17:50:15+00:00",
        "lat": 35.17659669999999749734342913143336772918701171875,
        "lon": 35.89323999999999870169631321914494037628173828125
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 11:17 UTC 75.0% ▼
  • Duration: 6h 21m
  • Radius: 29 meters
  • Data Points: 14 AIS positions
  • Centroid: 35.1765, 35.8934
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 29.300000000000000710542735760100185871124267578125,
    "duration_minutes": 381.1000000000000227373675443232059478759765625,
    "points": 14,
    "centroid": {
        "lat": 35.17645559285714540465050959028303623199462890625,
        "lon": 35.8933667714285746797031606547534465789794921875
    },
    "bbox": {
        "min_lat": 35.17636999999999858346200198866426944732666015625,
        "min_lon": 35.89315830000000318023012368939816951751708984375,
        "max_lat": 35.17659669999999749734342913143336772918701171875,
        "max_lon": 35.89367829999999770507201901637017726898193359375
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 10:23 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 4h 30m
  • Data Points: 15 AIS positions
  • Period: 2026-10-25T10:23:11+00:00 to 2026-10-25T14:53:13+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 270,
    "points_in_zone": 15,
    "first_point": {
        "ts": "2026-10-25T10:23:11+00:00",
        "lat": 35.17644500000000107320374809205532073974609375,
        "lon": 35.89327829999999863730408833362162113189697265625
    },
    "last_point": {
        "ts": "2026-10-25T14:53:13+00:00",
        "lat": 35.17638500000000334466676576994359493255615234375,
        "lon": 35.89366499999999859937815926969051361083984375
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 10:23 UTC 75.0% ▼
  • Duration: 4h 30m
  • Radius: 30 meters
  • Data Points: 15 AIS positions
  • Centroid: 35.1764, 35.8934
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 29.699999999999999289457264239899814128875732421875,
    "duration_minutes": 270,
    "points": 15,
    "centroid": {
        "lat": 35.17644855333333708813370321877300739288330078125,
        "lon": 35.89336042666666770628580707125365734100341796875
    },
    "bbox": {
        "min_lat": 35.17636999999999858346200198866426944732666015625,
        "min_lon": 35.89315830000000318023012368939816951751708984375,
        "max_lat": 35.17654830000000032441676012240350246429443359375,
        "max_lon": 35.89367829999999770507201901637017726898193359375
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Sts🛰️✗ Central Atlantic Monitoring Zone
Oct 25, 2026 07:35 UTC 75/100 ▼
Vessel A: IMO 9396335 (HISTRIA TIGER) LIBERIA
Vessel B: IMO 9288772 (DIDIMON) Liberia
  • Minimum Distance: 462 meters
  • Average Distance: 463 meters
  • Duration: 2h 48m
  • Period: 2026-10-25T07:35:12+00:00 to 2026-10-25T10:23:11+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (HISTRIA TIGER and DIDIMON) maintained close proximity (min 462m, avg 463m) for 168 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 462m, avg 463m
Duration25/25Duration 168 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-25T11:30:21.919181+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "min_distance_m": 462.19999999999998863131622783839702606201171875,
    "avg_distance_m": 462.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 0.90000000000000002220446049250313080847263336181640625,
    "duration_minutes": 168,
    "overlap_duration_s": 10079,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-25T07:35:12+00:00",
        "end": "2026-10-25T10:23:11+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 462m, avg 463m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 168 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (HISTRIA TIGER and DIDIMON) maintained close proximity (min 462m, avg 463m) for 168 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.1784363000000013244061847217381000518798828125,
            "lon": 35.89384919999999823403413756750524044036865234375
        },
        "time_window": {
            "start_ts": "2026-10-25T07:35:12+00:00",
            "end_ts": "2026-10-25T10:23:11+00:00"
        },
        "searched_at": "2026-10-25T11:30:21.919181+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 07:35 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 30m
  • Data Points: 12 AIS positions
  • Period: 2026-10-25T07:35:12+00:00 to 2026-10-25T14:05:15+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 390.1000000000000227373675443232059478759765625,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-10-25T07:35:12+00:00",
        "lat": 35.17641499999999865622157813049852848052978515625,
        "lon": 35.89303000000000309910319629125297069549560546875
    },
    "last_point": {
        "ts": "2026-10-25T14:05:15+00:00",
        "lat": 35.17638170000000030768205760978162288665771484375,
        "lon": 35.89361999999999852661858312785625457763671875
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 07:35 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 36 meters
  • Data Points: 12 AIS positions
  • Centroid: 35.1765, 35.8932
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 36,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "points": 12,
    "centroid": {
        "lat": 35.176467083333335494899074546992778778076171875,
        "lon": 35.89323831666666109185825916938483715057373046875
    },
    "bbox": {
        "min_lat": 35.17638170000000030768205760978162288665771484375,
        "min_lon": 35.89303000000000309910319629125297069549560546875,
        "max_lat": 35.17654830000000032441676012240350246429443359375,
        "max_lon": 35.89361999999999852661858312785625457763671875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 06:20 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 21m
  • Data Points: 15 AIS positions
  • Period: 2026-10-25T06:20:10+00:00 to 2026-10-25T12:41:15+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 381.1000000000000227373675443232059478759765625,
    "points_in_zone": 15,
    "first_point": {
        "ts": "2026-10-25T06:20:10+00:00",
        "lat": 35.17655500000000046156856114976108074188232421875,
        "lon": 35.8925550000000015415935195051133632659912109375
    },
    "last_point": {
        "ts": "2026-10-25T12:41:15+00:00",
        "lat": 35.17654830000000032441676012240350246429443359375,
        "lon": 35.89315830000000318023012368939816951751708984375
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 06:20 UTC 75.0% ▼
  • Duration: 6h 21m
  • Radius: 46 meters
  • Data Points: 15 AIS positions
  • Centroid: 35.1765, 35.8931
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 45.7999999999999971578290569595992565155029296875,
    "duration_minutes": 381.1000000000000227373675443232059478759765625,
    "points": 15,
    "centroid": {
        "lat": 35.17649644000000108690073830075562000274658203125,
        "lon": 35.893052326666662565912702120840549468994140625
    },
    "bbox": {
        "min_lat": 35.17641499999999865622157813049852848052978515625,
        "min_lon": 35.8925550000000015415935195051133632659912109375,
        "max_lat": 35.1765649999999965302777127362787723541259765625,
        "max_lon": 35.89327829999999863730408833362162113189697265625
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 05:08 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 33m
  • Data Points: 12 AIS positions
  • Period: 2026-10-25T05:35:12+00:00 to 2026-10-25T12:08:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-10-25T05:35:12+00:00",
        "lat": 35.1766649999999998499333742074668407440185546875,
        "lon": 35.89233999999999724650479038245975971221923828125
    },
    "last_point": {
        "ts": "2026-10-25T12:08:11+00:00",
        "lat": 35.1764916999999996960468706674873828887939453125,
        "lon": 35.89323499999999711462805862538516521453857421875
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 05:08 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 58 meters
  • Data Points: 12 AIS positions
  • Centroid: 35.1765, 35.8929
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 58,
    "duration_minutes": 393,
    "points": 12,
    "centroid": {
        "lat": 35.17650805833333294003750779666006565093994140625,
        "lon": 35.892946808333334729468333534896373748779296875
    },
    "bbox": {
        "min_lat": 35.17641499999999865622157813049852848052978515625,
        "min_lon": 35.89233999999999724650479038245975971221923828125,
        "max_lat": 35.1766649999999998499333742074668407440185546875,
        "max_lon": 35.89327829999999863730408833362162113189697265625
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 03:05 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 4h 30m
  • Data Points: 9 AIS positions
  • Period: 2026-10-25T03:05:10+00:00 to 2026-10-25T07:35:12+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 270,
    "points_in_zone": 9,
    "first_point": {
        "ts": "2026-10-25T03:05:10+00:00",
        "lat": 35.1765266999999965946699376218020915985107421875,
        "lon": 35.892411699999996699261828325688838958740234375
    },
    "last_point": {
        "ts": "2026-10-25T07:35:12+00:00",
        "lat": 35.17641499999999865622157813049852848052978515625,
        "lon": 35.89303000000000309910319629125297069549560546875
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 02:11 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 5h 24m
  • Data Points: 13 AIS positions
  • Period: 2026-10-25T02:11:12+00:00 to 2026-10-25T07:35:12+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 324,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-10-25T02:11:12+00:00",
        "lat": 35.1765400000000028057911549694836139678955078125,
        "lon": 35.8926067000000017515048966743052005767822265625
    },
    "last_point": {
        "ts": "2026-10-25T07:35:12+00:00",
        "lat": 35.17641499999999865622157813049852848052978515625,
        "lon": 35.89303000000000309910319629125297069549560546875
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 02:11 UTC 75.0% ▼
  • Duration: 5h 24m
  • Radius: 40 meters
  • Data Points: 13 AIS positions
  • Centroid: 35.1765, 35.8926
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 40.10000000000000142108547152020037174224853515625,
    "duration_minutes": 324,
    "points": 13,
    "centroid": {
        "lat": 35.17653345384615448665499570779502391815185546875,
        "lon": 35.89261423846154031025434960611164569854736328125
    },
    "bbox": {
        "min_lat": 35.17641499999999865622157813049852848052978515625,
        "min_lon": 35.89233999999999724650479038245975971221923828125,
        "max_lat": 35.1766649999999998499333742074668407440185546875,
        "max_lon": 35.89303000000000309910319629125297069549560546875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 01:22 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 12m
  • Data Points: 16 AIS positions
  • Period: 2026-10-25T01:22:16+00:00 to 2026-10-25T07:35:12+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 372.8999999999999772626324556767940521240234375,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-10-25T01:22:16+00:00",
        "lat": 35.17649329999999707752067479304969310760498046875,
        "lon": 35.89278829999999942401700536720454692840576171875
    },
    "last_point": {
        "ts": "2026-10-25T07:35:12+00:00",
        "lat": 35.17641499999999865622157813049852848052978515625,
        "lon": 35.89303000000000309910319629125297069549560546875
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 01:22 UTC 75.0% ▼
  • Duration: 6h 12m
  • Radius: 39 meters
  • Data Points: 16 AIS positions
  • Centroid: 35.1765, 35.8926
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 39.10000000000000142108547152020037174224853515625,
    "duration_minutes": 372.8999999999999772626324556767940521240234375,
    "points": 16,
    "centroid": {
        "lat": 35.17653207500000434038156527094542980194091796875,
        "lon": 35.89262542500000563450157642364501953125
    },
    "bbox": {
        "min_lat": 35.17641499999999865622157813049852848052978515625,
        "min_lon": 35.89233999999999724650479038245975971221923828125,
        "max_lat": 35.1766649999999998499333742074668407440185546875,
        "max_lon": 35.89303000000000309910319629125297069549560546875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 25, 2026 00:44 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 12m
  • Data Points: 19 AIS positions
  • Period: 2026-10-25T00:44:09+00:00 to 2026-10-25T06:56:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 372,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-10-25T00:44:09+00:00",
        "lat": 35.17638329999999768915586173534393310546875,
        "lon": 35.8925832999999983030647854320704936981201171875
    },
    "last_point": {
        "ts": "2026-10-25T06:56:11+00:00",
        "lat": 35.17654329999999873734850552864372730255126953125,
        "lon": 35.8926967000000018970240489579737186431884765625
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 25, 2026 00:44 UTC 75.0% ▼
  • Duration: 6h 12m
  • Radius: 31 meters
  • Data Points: 19 AIS positions
  • Centroid: 35.1765, 35.8926
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 30.60000000000000142108547152020037174224853515625,
    "duration_minutes": 372,
    "points": 19,
    "centroid": {
        "lat": 35.176497268421059061438427306711673736572265625,
        "lon": 35.89260666842105962359710247255861759185791015625
    },
    "bbox": {
        "min_lat": 35.176299999999997680788510479032993316650390625,
        "min_lon": 35.89233999999999724650479038245975971221923828125,
        "max_lat": 35.1766649999999998499333742074668407440185546875,
        "max_lon": 35.89278829999999942401700536720454692840576171875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 23:14 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 30m
  • Data Points: 18 AIS positions
  • Period: 2026-10-24T23:50:12+00:00 to 2026-10-25T06:20:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 390,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-10-24T23:50:12+00:00",
        "lat": 35.1764500000000026602720026858150959014892578125,
        "lon": 35.89240000000000208046913030557334423065185546875
    },
    "last_point": {
        "ts": "2026-10-25T06:20:10+00:00",
        "lat": 35.17655500000000046156856114976108074188232421875,
        "lon": 35.8925550000000015415935195051133632659912109375
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 24, 2026 23:14 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 29 meters
  • Data Points: 18 AIS positions
  • Centroid: 35.1765, 35.8926
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 29.300000000000000710542735760100185871124267578125,
    "duration_minutes": 390,
    "points": 18,
    "centroid": {
        "lat": 35.17648406111110404026476317085325717926025390625,
        "lon": 35.89257425555555158780407509766519069671630859375
    },
    "bbox": {
        "min_lat": 35.176299999999997680788510479032993316650390625,
        "min_lon": 35.89233999999999724650479038245975971221923828125,
        "max_lat": 35.1766649999999998499333742074668407440185546875,
        "max_lon": 35.89278829999999942401700536720454692840576171875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 22:05 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 5 hours
  • Data Points: 17 AIS positions
  • Period: 2026-10-24T22:05:10+00:00 to 2026-10-25T03:05:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 300,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-10-24T22:05:10+00:00",
        "lat": 35.1763499999999993406163412146270275115966796875,
        "lon": 35.89271670000000113986970973201096057891845703125
    },
    "last_point": {
        "ts": "2026-10-25T03:05:10+00:00",
        "lat": 35.1765266999999965946699376218020915985107421875,
        "lon": 35.892411699999996699261828325688838958740234375
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 24, 2026 22:05 UTC 75.0% ▼
  • Duration: 5 hours
  • Radius: 27 meters
  • Data Points: 17 AIS positions
  • Centroid: 35.1765, 35.8926
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 26.699999999999999289457264239899814128875732421875,
    "duration_minutes": 300,
    "points": 17,
    "centroid": {
        "lat": 35.176453317647059293449274264276027679443359375,
        "lon": 35.8925748999999996158294379711151123046875
    },
    "bbox": {
        "min_lat": 35.176299999999997680788510479032993316650390625,
        "min_lon": 35.892283300000002554952516220510005950927734375,
        "max_lat": 35.17656170000000059872036217711865901947021484375,
        "max_lon": 35.89278829999999942401700536720454692840576171875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 21:40 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 5h 25m
  • Data Points: 19 AIS positions
  • Period: 2026-10-24T21:40:11+00:00 to 2026-10-25T03:05:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 325,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-10-24T21:40:11+00:00",
        "lat": 35.17641669999999720630512456409633159637451171875,
        "lon": 35.8925832999999983030647854320704936981201171875
    },
    "last_point": {
        "ts": "2026-10-25T03:05:10+00:00",
        "lat": 35.1765266999999965946699376218020915985107421875,
        "lon": 35.892411699999996699261828325688838958740234375
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 24, 2026 21:40 UTC 75.0% ▼
  • Duration: 5h 25m
  • Radius: 27 meters
  • Data Points: 19 AIS positions
  • Centroid: 35.1764, 35.8926
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 27.300000000000000710542735760100185871124267578125,
    "duration_minutes": 325,
    "points": 19,
    "centroid": {
        "lat": 35.1764424421052552816036040894687175750732421875,
        "lon": 35.89258280526316724490243359468877315521240234375
    },
    "bbox": {
        "min_lat": 35.17628330000000147492755786515772342681884765625,
        "min_lon": 35.892283300000002554952516220510005950927734375,
        "max_lat": 35.17656170000000059872036217711865901947021484375,
        "max_lon": 35.89278829999999942401700536720454692840576171875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 20:02 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 36m
  • Data Points: 19 AIS positions
  • Period: 2026-10-24T20:02:11+00:00 to 2026-10-25T02:38:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-10-24T20:02:11+00:00",
        "lat": 35.176483300000001008811523206532001495361328125,
        "lon": 35.89240000000000208046913030557334423065185546875
    },
    "last_point": {
        "ts": "2026-10-25T02:38:11+00:00",
        "lat": 35.17654329999999873734850552864372730255126953125,
        "lon": 35.89269829999999927849785308353602886199951171875
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 24, 2026 20:02 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 27 meters
  • Data Points: 19 AIS positions
  • Centroid: 35.1764, 35.8926
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 27.199999999999999289457264239899814128875732421875,
    "duration_minutes": 396,
    "points": 19,
    "centroid": {
        "lat": 35.17644015789473854738389491103589534759521484375,
        "lon": 35.8925821894736856165764038451015949249267578125
    },
    "bbox": {
        "min_lat": 35.17628330000000147492755786515772342681884765625,
        "min_lon": 35.892283300000002554952516220510005950927734375,
        "max_lat": 35.17656170000000059872036217711865901947021484375,
        "max_lon": 35.89278829999999942401700536720454692840576171875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 19:44 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 30m
  • Data Points: 19 AIS positions
  • Period: 2026-10-24T19:50:11+00:00 to 2026-10-25T02:20:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 390,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-10-24T19:50:11+00:00",
        "lat": 35.17649999999999721467247582040727138519287109375,
        "lon": 35.89233329999999710935298935510218143463134765625
    },
    "last_point": {
        "ts": "2026-10-25T02:20:11+00:00",
        "lat": 35.176434999999997899067238904535770416259765625,
        "lon": 35.8926467000000002371962182223796844482421875
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 24, 2026 19:44 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 26 meters
  • Data Points: 19 AIS positions
  • Centroid: 35.1764, 35.8926
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 25.5,
    "duration_minutes": 390,
    "points": 19,
    "centroid": {
        "lat": 35.1764378789473681763411150313913822174072265625,
        "lon": 35.89256297894737457454539253376424312591552734375
    },
    "bbox": {
        "min_lat": 35.17628330000000147492755786515772342681884765625,
        "min_lon": 35.892283300000002554952516220510005950927734375,
        "max_lat": 35.17656170000000059872036217711865901947021484375,
        "max_lon": 35.89278829999999942401700536720454692840576171875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 18:47 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 9m
  • Data Points: 16 AIS positions
  • Period: 2026-10-24T18:47:12+00:00 to 2026-10-25T00:56:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 369,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-10-24T18:47:12+00:00",
        "lat": 35.1763499999999993406163412146270275115966796875,
        "lon": 35.892533299999996643236954696476459503173828125
    },
    "last_point": {
        "ts": "2026-10-25T00:56:11+00:00",
        "lat": 35.176299999999997680788510479032993316650390625,
        "lon": 35.892733300000003282548277638852596282958984375
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 24, 2026 18:47 UTC 75.0% ▼
  • Duration: 6h 9m
  • Radius: 24 meters
  • Data Points: 16 AIS positions
  • Centroid: 35.1764, 35.8925
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 24.10000000000000142108547152020037174224853515625,
    "duration_minutes": 369,
    "points": 16,
    "centroid": {
        "lat": 35.17640831874999918227331363596022129058837890625,
        "lon": 35.89250415625000556474333279766142368316650390625
    },
    "bbox": {
        "min_lat": 35.17628330000000147492755786515772342681884765625,
        "min_lon": 35.892283300000002554952516220510005950927734375,
        "max_lat": 35.17649999999999721467247582040727138519287109375,
        "max_lon": 35.892733300000003282548277638852596282958984375
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 14:04 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 5h 57m
  • Data Points: 7 AIS positions
  • Period: 2026-10-24T14:04:24+00:00 to 2026-10-24T20:02:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 357.80000000000001136868377216160297393798828125,
    "points_in_zone": 7,
    "first_point": {
        "ts": "2026-10-24T14:04:24+00:00",
        "lat": 35.17644829999999700476109865121543407440185546875,
        "lon": 35.8935450000000031423041946254670619964599609375
    },
    "last_point": {
        "ts": "2026-10-24T20:02:11+00:00",
        "lat": 35.176483300000001008811523206532001495361328125,
        "lon": 35.89240000000000208046913030557334423065185546875
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Central Atlantic Monitoring Zone
Oct 24, 2026 11:13 UTC 75/100 ▼
Vessel A: IMO 9396335 (HISTRIA TIGER) LIBERIA
Vessel B: IMO 9288772 (DIDIMON) Liberia
  • Minimum Distance: 430 meters
  • Average Distance: 447 meters
  • Duration: 3h 3m
  • Period: 2026-10-24T11:13:20+00:00 to 2026-10-24T14:16:22+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (HISTRIA TIGER and DIDIMON) maintained close proximity (min 430m, avg 447m) for 183 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 430m, avg 447m
Duration25/25Duration 183 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±21m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-24T15:30:01.617886+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "min_distance_m": 430.3999999999999772626324556767940521240234375,
    "avg_distance_m": 447.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 21,
    "duration_minutes": 183,
    "overlap_duration_s": 10982,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-24T11:13:20+00:00",
        "end": "2026-10-24T14:16:22+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 430m, avg 447m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 183 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b121m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (HISTRIA TIGER and DIDIMON) maintained close proximity (min 430m, avg 447m) for 183 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.1790457999999972571458783932030200958251953125,
            "lon": 35.89503810000000072477632784284651279449462890625
        },
        "time_window": {
            "start_ts": "2026-10-24T11:13:20+00:00",
            "end_ts": "2026-10-24T14:16:22+00:00"
        },
        "searched_at": "2026-10-24T15:30:01.617886+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 11:13 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 3h 3m
  • Data Points: 6 AIS positions
  • Period: 2026-10-24T11:13:20+00:00 to 2026-10-24T14:16:22+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 183,
    "points_in_zone": 6,
    "first_point": {
        "ts": "2026-10-24T11:13:20+00:00",
        "lat": 35.17753830000000192512743524275720119476318359375,
        "lon": 35.89493499999999670535544282756745815277099609375
    },
    "last_point": {
        "ts": "2026-10-24T14:16:22+00:00",
        "lat": 35.17638170000000030768205760978162288665771484375,
        "lon": 35.8935383000000030051523935981094837188720703125
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 10:04 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 4h 12m
  • Data Points: 7 AIS positions
  • Period: 2026-10-24T10:04:24+00:00 to 2026-10-24T14:16:22+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 252,
    "points_in_zone": 7,
    "first_point": {
        "ts": "2026-10-24T10:04:24+00:00",
        "lat": 35.17790169999999960737113724462687969207763671875,
        "lon": 35.89510829999999685924194636754691600799560546875
    },
    "last_point": {
        "ts": "2026-10-24T14:16:22+00:00",
        "lat": 35.17638170000000030768205760978162288665771484375,
        "lon": 35.8935383000000030051523935981094837188720703125
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 09:19 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 4h 57m
  • Data Points: 9 AIS positions
  • Period: 2026-10-24T09:19:22+00:00 to 2026-10-24T14:16:22+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 297,
    "points_in_zone": 9,
    "first_point": {
        "ts": "2026-10-24T09:19:22+00:00",
        "lat": 35.1776832999999982121153152547776699066162109375,
        "lon": 35.89500170000000167647158377803862094879150390625
    },
    "last_point": {
        "ts": "2026-10-24T14:16:22+00:00",
        "lat": 35.17638170000000030768205760978162288665771484375,
        "lon": 35.8935383000000030051523935981094837188720703125
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 05:10 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 17m
  • Data Points: 9 AIS positions
  • Period: 2026-10-24T05:10:25+00:00 to 2026-10-24T11:28:20+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 377.8999999999999772626324556767940521240234375,
    "points_in_zone": 9,
    "first_point": {
        "ts": "2026-10-24T05:10:25+00:00",
        "lat": 35.1766750000000030240698833949863910675048828125,
        "lon": 35.8939850000000006957634468562901020050048828125
    },
    "last_point": {
        "ts": "2026-10-24T11:28:20+00:00",
        "lat": 35.17736330000000322115738526917994022369384765625,
        "lon": 35.894818299999997179838828742504119873046875
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 24, 2026 04:55 UTC 75.0% ▼
  • Duration: 6h 32m
  • Radius: 104 meters
  • Data Points: 10 AIS positions
  • Centroid: 35.1773, 35.8947
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 104.2999999999999971578290569595992565155029296875,
    "duration_minutes": 392.8999999999999772626324556767940521240234375,
    "points": 10,
    "centroid": {
        "lat": 35.1773258200000071838076109997928142547607421875,
        "lon": 35.8946676700000040227678255178034305572509765625
    },
    "bbox": {
        "min_lat": 35.1766233000000028141585062257945537567138671875,
        "min_lon": 35.8939067000000022744643501937389373779296875,
        "max_lat": 35.17790169999999960737113724462687969207763671875,
        "max_lon": 35.89510829999999685924194636754691600799560546875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Sts Central Atlantic Monitoring Zone
Oct 24, 2026 04:25 UTC 62/100 ▼
Vessel A: IMO 9288772 (DIDIMON) Liberia
Vessel B: IMO 9396335 (HISTRIA TIGER) LIBERIA
  • Minimum Distance: 442 meters
  • Average Distance: 462 meters
  • Duration: 1h 7m
  • Period: 2026-10-24T04:25:40+00:00 to 2026-10-24T05:33:34+00:00
  • Vessel A Avg Speed: 0.3 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 62/100

Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 442m, avg 462m) for 68 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 Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 442m, avg 462m
Duration15/25Duration 68 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±13m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 441.69999999999998863131622783839702606201171875,
    "avg_distance_m": 461.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 12.800000000000000710542735760100185871124267578125,
    "duration_minutes": 67.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 4074,
    "speed_a_avg": 0.270000000000000017763568394002504646778106689453125,
    "speed_a_std": 0.40000000000000002220446049250313080847263336181640625,
    "speed_b_avg": 0.200000000000000011102230246251565404236316680908203125,
    "speed_b_std": 0.190000000000000002220446049250313080847263336181640625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.270000000000000017763568394002504646778106689453125,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0.200000000000000011102230246251565404236316680908203125,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-10-24T04:25:40+00:00",
        "end": "2026-10-24T05:33:34+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 62,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 442m, avg 462m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 68 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b113m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 442m, avg 462m) for 68 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 Central Atlantic Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 04:25 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 32m
  • Data Points: 10 AIS positions
  • Period: 2026-10-24T04:55:23+00:00 to 2026-10-24T11:28:20+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 392.8999999999999772626324556767940521240234375,
    "points_in_zone": 10,
    "first_point": {
        "ts": "2026-10-24T04:55:23+00:00",
        "lat": 35.1766233000000028141585062257945537567138671875,
        "lon": 35.8939067000000022744643501937389373779296875
    },
    "last_point": {
        "ts": "2026-10-24T11:28:20+00:00",
        "lat": 35.17736330000000322115738526917994022369384765625,
        "lon": 35.894818299999997179838828742504119873046875
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 03:27 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 33m
  • Data Points: 10 AIS positions
  • Period: 2026-10-24T03:30:38+00:00 to 2026-10-24T10:04:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 393.80000000000001136868377216160297393798828125,
    "points_in_zone": 10,
    "first_point": {
        "ts": "2026-10-24T03:30:38+00:00",
        "lat": 35.17639170000000348181856679730117321014404296875,
        "lon": 35.8928717000000006009940989315509796142578125
    },
    "last_point": {
        "ts": "2026-10-24T10:04:24+00:00",
        "lat": 35.17790169999999960737113724462687969207763671875,
        "lon": 35.89510829999999685924194636754691600799560546875
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 24, 2026 03:27 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 154 meters
  • Data Points: 10 AIS positions
  • Centroid: 35.1769, 35.8939
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 153.69999999999998863131622783839702606201171875,
    "duration_minutes": 393.80000000000001136868377216160297393798828125,
    "points": 10,
    "centroid": {
        "lat": 35.17690400000000039426595321856439113616943359375,
        "lon": 35.8939381800000063549305195920169353485107421875
    },
    "bbox": {
        "min_lat": 35.1763566999999994777681422419846057891845703125,
        "min_lon": 35.89278999999999797410055180080235004425048828125,
        "max_lat": 35.17790169999999960737113724462687969207763671875,
        "max_lon": 35.89510829999999685924194636754691600799560546875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 02:03 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 3h 27m
  • Data Points: 10 AIS positions
  • Period: 2026-10-24T02:03:29+00:00 to 2026-10-24T05:31:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 207.900000000000005684341886080801486968994140625,
    "points_in_zone": 10,
    "first_point": {
        "ts": "2026-10-24T02:03:29+00:00",
        "lat": 35.17644500000000107320374809205532073974609375,
        "lon": 35.89308330000000069048837758600711822509765625
    },
    "last_point": {
        "ts": "2026-10-24T05:31:24+00:00",
        "lat": 35.1770082999999971207216731272637844085693359375,
        "lon": 35.89420499999999947249307297170162200927734375
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 24, 2026 02:03 UTC 75.0% ▼
  • Duration: 3h 27m
  • Radius: 96 meters
  • Data Points: 10 AIS positions
  • Centroid: 35.1765, 35.8933
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 96.2999999999999971578290569595992565155029296875,
    "duration_minutes": 207.900000000000005684341886080801486968994140625,
    "points": 10,
    "centroid": {
        "lat": 35.17651067000000608686605119146406650543212890625,
        "lon": 35.8933388399999984130772645585238933563232421875
    },
    "bbox": {
        "min_lat": 35.1763566999999994777681422419846057891845703125,
        "min_lon": 35.89278999999999797410055180080235004425048828125,
        "max_lat": 35.1770082999999971207216731272637844085693359375,
        "max_lon": 35.89420499999999947249307297170162200927734375
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 01:23 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 4h 7m
  • Data Points: 14 AIS positions
  • Period: 2026-10-24T01:23:27+00:00 to 2026-10-24T05:31:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 247.900000000000005684341886080801486968994140625,
    "points_in_zone": 14,
    "first_point": {
        "ts": "2026-10-24T01:23:27+00:00",
        "lat": 35.17659669999999749734342913143336772918701171875,
        "lon": 35.89388000000000289446688839234411716461181640625
    },
    "last_point": {
        "ts": "2026-10-24T05:31:24+00:00",
        "lat": 35.1770082999999971207216731272637844085693359375,
        "lon": 35.89420499999999947249307297170162200927734375
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 24, 2026 01:23 UTC 75.0% ▼
  • Duration: 4h 7m
  • Radius: 93 meters
  • Data Points: 14 AIS positions
  • Centroid: 35.1765, 35.8934
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 92.900000000000005684341886080801486968994140625,
    "duration_minutes": 247.900000000000005684341886080801486968994140625,
    "points": 14,
    "centroid": {
        "lat": 35.17650429285713897797904792241752147674560546875,
        "lon": 35.89339095714285576832480728626251220703125
    },
    "bbox": {
        "min_lat": 35.17634170000000182199073606170713901519775390625,
        "min_lon": 35.89278999999999797410055180080235004425048828125,
        "max_lat": 35.1770082999999971207216731272637844085693359375,
        "max_lon": 35.89420499999999947249307297170162200927734375
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Sts Central Atlantic Monitoring Zone
Oct 24, 2026 00:26 UTC 67/100 ▼
Vessel A: IMO 9288772 (DIDIMON) Liberia
Vessel B: IMO 9396335 (HISTRIA TIGER) LIBERIA
  • Minimum Distance: 442 meters
  • Average Distance: 457 meters
  • Duration: 1h 48m
  • Period: 2026-10-24T00:26:47+00:00 to 2026-10-24T02:15:21+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 67/100

Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 442m, avg 456m) for 109 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 442m, avg 456m
Duration20/25Duration 109 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±11m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 442.30000000000001136868377216160297393798828125,
    "avg_distance_m": 456.5,
    "distance_consistency_m": 11.199999999999999289457264239899814128875732421875,
    "duration_minutes": 108.599999999999994315658113919198513031005859375,
    "overlap_duration_s": 6514,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.1700000000000000122124532708767219446599483489990234375,
    "speed_b_std": 0.35999999999999998667732370449812151491641998291015625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0.1700000000000000122124532708767219446599483489990234375,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        }
    },
    "time_window": {
        "start": "2026-10-24T00:26:47+00:00",
        "end": "2026-10-24T02:15:21+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 67,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 442m, avg 456m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 109 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b111m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 442m, avg 456m) for 109 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 24, 2026 00:04 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 5h 26m
  • Data Points: 22 AIS positions
  • Period: 2026-10-24T00:04:35+00:00 to 2026-10-24T05:31:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 326.80000000000001136868377216160297393798828125,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-10-24T00:04:35+00:00",
        "lat": 35.176569999999998117345967330038547515869140625,
        "lon": 35.8935383000000030051523935981094837188720703125
    },
    "last_point": {
        "ts": "2026-10-24T05:31:24+00:00",
        "lat": 35.1770082999999971207216731272637844085693359375,
        "lon": 35.89420499999999947249307297170162200927734375
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 24, 2026 00:04 UTC 75.0% ▼
  • Duration: 5h 26m
  • Radius: 77 meters
  • Data Points: 22 AIS positions
  • Centroid: 35.1766, 35.8936
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 77.400000000000005684341886080801486968994140625,
    "duration_minutes": 326.80000000000001136868377216160297393798828125,
    "points": 22,
    "centroid": {
        "lat": 35.17655144999999805577317602001130580902099609375,
        "lon": 35.893563263636366400533006526529788970947265625
    },
    "bbox": {
        "min_lat": 35.17634170000000182199073606170713901519775390625,
        "min_lon": 35.89278999999999797410055180080235004425048828125,
        "max_lat": 35.1770082999999971207216731272637844085693359375,
        "max_lon": 35.89420499999999947249307297170162200927734375
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Sts🛰️✗ Central Atlantic Monitoring Zone
Oct 23, 2026 23:10 UTC 67/100 ▼
Vessel A: IMO 9396335 (HISTRIA TIGER) LIBERIA
Vessel B: IMO 9288772 (DIDIMON) Liberia
  • Minimum Distance: 450 meters
  • Average Distance: 460 meters
  • Duration: 1h 33m
  • Period: 2026-10-23T23:22:37+00:00 to 2026-10-24T00:56:23+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 67/100

Moderate-confidence STS candidate. Two tankers (HISTRIA TIGER and DIDIMON) maintained close proximity (min 450m, avg 460m) for 94 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 450m, avg 460m
Duration20/25Duration 94 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±8m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-24T05:45:01.590318+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "min_distance_m": 449.69999999999998863131622783839702606201171875,
    "avg_distance_m": 460.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 7.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 93.7999999999999971578290569595992565155029296875,
    "overlap_duration_s": 5626,
    "speed_a_avg": 0.13000000000000000444089209850062616169452667236328125,
    "speed_a_std": 0.309999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.13000000000000000444089209850062616169452667236328125,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-23T23:22:37+00:00",
        "end": "2026-10-24T00:56:23+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 67,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 450m, avg 460m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 94 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: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (HISTRIA TIGER and DIDIMON) maintained close proximity (min 450m, avg 460m) for 94 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.178470099999998410567059181630611419677734375,
            "lon": 35.8941616999999979498170432634651660919189453125
        },
        "time_window": {
            "start_ts": "2026-10-23T23:10:49+00:00",
            "end_ts": "2026-10-24T00:56:23+00:00"
        },
        "searched_at": "2026-10-24T05:45:01.590318+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 23, 2026 23:07 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 23m
  • Data Points: 27 AIS positions
  • Period: 2026-10-23T23:07:34+00:00 to 2026-10-24T05:31:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 383.80000000000001136868377216160297393798828125,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-10-23T23:07:34+00:00",
        "lat": 35.1763432999999992034645401872694492340087890625,
        "lon": 35.89309829999999834626578376628458499908447265625
    },
    "last_point": {
        "ts": "2026-10-24T05:31:24+00:00",
        "lat": 35.1770082999999971207216731272637844085693359375,
        "lon": 35.89420499999999947249307297170162200927734375
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 23, 2026 23:07 UTC 75.0% ▼
  • Duration: 6h 23m
  • Radius: 80 meters
  • Data Points: 27 AIS positions
  • Centroid: 35.1765, 35.8935
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 80.099999999999994315658113919198513031005859375,
    "duration_minutes": 383.80000000000001136868377216160297393798828125,
    "points": 27,
    "centroid": {
        "lat": 35.17653482222221583697319147177040576934814453125,
        "lon": 35.89354136296297070884975255466997623443603515625
    },
    "bbox": {
        "min_lat": 35.17634170000000182199073606170713901519775390625,
        "min_lon": 35.89278999999999797410055180080235004425048828125,
        "max_lat": 35.1770082999999971207216731272637844085693359375,
        "max_lon": 35.89420499999999947249307297170162200927734375
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Sts Central Atlantic Monitoring Zone
Oct 23, 2026 22:34 UTC 75/100 ▼
Vessel A: IMO 9396335 (HISTRIA TIGER) LIBERIA
Vessel B: IMO 9288772 (DIDIMON) Liberia
  • Minimum Distance: 448 meters
  • Average Distance: 461 meters
  • Duration: 2 hours
  • Period: 2026-10-23T22:55:37+00:00 to 2026-10-24T00:56:23+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (HISTRIA TIGER and DIDIMON) maintained close proximity (min 448m, avg 461m) for 121 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 448m, avg 461m
Duration25/25Duration 121 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±10m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "min_distance_m": 448.30000000000001136868377216160297393798828125,
    "avg_distance_m": 460.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 10.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 120.7999999999999971578290569595992565155029296875,
    "overlap_duration_s": 7246,
    "speed_a_avg": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.289999999999999980015985556747182272374629974365234375,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11000000000000000055511151231257827021181583404541015625,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-23T22:55:37+00:00",
        "end": "2026-10-24T00:56:23+00:00"
    },
    "points_count": {
        "vessel_a": 14,
        "vessel_b": 14
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 448m, avg 461m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 121 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (HISTRIA TIGER and DIDIMON) maintained close proximity (min 448m, avg 461m) for 121 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 23, 2026 22:03 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 29m
  • Data Points: 29 AIS positions
  • Period: 2026-10-23T22:40:38+00:00 to 2026-10-24T05:10:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 389.80000000000001136868377216160297393798828125,
    "points_in_zone": 29,
    "first_point": {
        "ts": "2026-10-23T22:40:38+00:00",
        "lat": 35.17651330000000342579369316808879375457763671875,
        "lon": 35.89282999999999645979187334887683391571044921875
    },
    "last_point": {
        "ts": "2026-10-24T05:10:25+00:00",
        "lat": 35.1766750000000030240698833949863910675048828125,
        "lon": 35.8939850000000006957634468562901020050048828125
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 23, 2026 22:03 UTC 75.0% ▼
  • Duration: 6h 29m
  • Radius: 73 meters
  • Data Points: 29 AIS positions
  • Centroid: 35.1765, 35.8934
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 72.7000000000000028421709430404007434844970703125,
    "duration_minutes": 389.80000000000001136868377216160297393798828125,
    "points": 29,
    "centroid": {
        "lat": 35.17651287931033721179119311273097991943359375,
        "lon": 35.89344178620689262970699928700923919677734375
    },
    "bbox": {
        "min_lat": 35.17634170000000182199073606170713901519775390625,
        "min_lon": 35.8927316999999987956471159122884273529052734375,
        "max_lat": 35.1767516999999969584678183309733867645263671875,
        "max_lon": 35.89418500000000022964741219766438007354736328125
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Sts Central Atlantic Monitoring Zone
Oct 23, 2026 21:23 UTC 72/100 ▼
Vessel A: IMO 9396335 (HISTRIA TIGER) LIBERIA
Vessel B: IMO 9288772 (DIDIMON) Liberia
  • Minimum Distance: 444 meters
  • Average Distance: 465 meters
  • Duration: 3h 33m
  • Period: 2026-10-23T21:23:05+00:00 to 2026-10-24T00:56:23+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 72/100

Moderate-confidence STS candidate. Two tankers (HISTRIA TIGER and DIDIMON) maintained close proximity (min 444m, avg 465m) for 213 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 444m, avg 465m
Duration25/25Duration 213 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±14m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "min_distance_m": 444,
    "avg_distance_m": 465,
    "distance_consistency_m": 14,
    "duration_minutes": 213.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 12798,
    "speed_a_avg": 0.179999999999999993338661852249060757458209991455078125,
    "speed_a_std": 0.2800000000000000266453525910037569701671600341796875,
    "speed_b_avg": 0.200000000000000011102230246251565404236316680908203125,
    "speed_b_std": 0.40000000000000002220446049250313080847263336181640625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.179999999999999993338661852249060757458209991455078125,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0.200000000000000011102230246251565404236316680908203125,
            "max_sog": 1.600000000000000088817841970012523233890533447265625
        }
    },
    "time_window": {
        "start": "2026-10-23T21:23:05+00:00",
        "end": "2026-10-24T00:56:23+00:00"
    },
    "points_count": {
        "vessel_a": 26,
        "vessel_b": 26
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 72,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 444m, avg 465m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 213 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable 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: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (HISTRIA TIGER and DIDIMON) maintained close proximity (min 444m, avg 465m) for 213 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 23, 2026 21:11 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 36m
  • Data Points: 33 AIS positions
  • Period: 2026-10-23T21:51:38+00:00 to 2026-10-24T04:27:45+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-10-23T21:51:38+00:00",
        "lat": 35.1764366999999964491507853381335735321044921875,
        "lon": 35.8938167000000021289451979100704193115234375
    },
    "last_point": {
        "ts": "2026-10-24T04:27:45+00:00",
        "lat": 35.17639669999999796345946379005908966064453125,
        "lon": 35.8933549999999996771293808706104755401611328125
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 23, 2026 21:11 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 285 meters
  • Data Points: 33 AIS positions
  • Centroid: 35.1765, 35.8936
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 284.5,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 33,
    "centroid": {
        "lat": 35.17646925151515091556575498543679714202880859375,
        "lon": 35.893573287878780320170335471630096435546875
    },
    "bbox": {
        "min_lat": 35.17586000000000012732925824820995330810546875,
        "min_lon": 35.8927316999999987956471159122884273529052734375,
        "max_lat": 35.1767516999999969584678183309733867645263671875,
        "max_lon": 35.89660669999999953461156110279262065887451171875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Sts🛰️✗ Central Atlantic Monitoring Zone
Oct 23, 2026 20:31 UTC 54/100 ▼
Vessel A: IMO 9396335 (HISTRIA TIGER) LIBERIA
Vessel B: IMO 9288772 (DIDIMON) Liberia
  • Minimum Distance: 462 meters
  • Average Distance: 472 meters
  • Duration: 47 minutes
  • Period: 2026-10-23T20:31:44+00:00 to 2026-10-23T21:18:45+00:00
  • Vessel A Avg Speed: 0.4 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 54/100

Low-confidence STS candidate - may warrant review. Two tankers (HISTRIA TIGER and DIDIMON) maintained close proximity (min 462m, avg 472m) for 47 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 Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 462m, avg 472m
Duration10/25Duration 47 minutes
Speed Stability14/20both nearly stationary; somewhat variable speeds
Distance Consistency15/15Distance variance ±11m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-23T21:45:01.854271+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "min_distance_m": 461.80000000000001136868377216160297393798828125,
    "avg_distance_m": 472.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 10.800000000000000710542735760100185871124267578125,
    "duration_minutes": 47,
    "overlap_duration_s": 2821,
    "speed_a_avg": 0.38000000000000000444089209850062616169452667236328125,
    "speed_a_std": 0.68000000000000004884981308350688777863979339599609375,
    "speed_b_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_std": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.38000000000000000444089209850062616169452667236328125,
            "max_sog": 1.399999999999999911182158029987476766109466552734375
        },
        "vessel_b": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-10-23T20:31:44+00:00",
        "end": "2026-10-23T21:18:45+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 54,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 462m, avg 472m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 47 minutes"
            },
            "speed_stability": {
                "score": 14,
                "max": 20,
                "detail": "both nearly stationary; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b111m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Low-confidence STS candidate - may warrant review. Two tankers (HISTRIA TIGER and DIDIMON) maintained close proximity (min 462m, avg 472m) for 47 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 Central Atlantic Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.17836390000000079680830822326242923736572265625,
            "lon": 35.89399230000000073914634413085877895355224609375
        },
        "time_window": {
            "start_ts": "2026-10-23T20:31:44+00:00",
            "end_ts": "2026-10-23T21:18:45+00:00"
        },
        "searched_at": "2026-10-23T21:45:01.854271+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 23, 2026 20:07 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 5h 58m
  • Data Points: 39 AIS positions
  • Period: 2026-10-23T20:07:42+00:00 to 2026-10-24T02:06:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 358.80000000000001136868377216160297393798828125,
    "points_in_zone": 39,
    "first_point": {
        "ts": "2026-10-23T20:07:42+00:00",
        "lat": 35.17637500000000017053025658242404460906982421875,
        "lon": 35.89300999999999675083017791621387004852294921875
    },
    "last_point": {
        "ts": "2026-10-24T02:06:32+00:00",
        "lat": 35.1764466999999996232872945256531238555908203125,
        "lon": 35.89302500000000151203494169749319553375244140625
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 23, 2026 20:07 UTC 75.0% ▼
  • Duration: 5h 58m
  • Radius: 284 meters
  • Data Points: 39 AIS positions
  • Centroid: 35.1765, 35.8936
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 284.19999999999998863131622783839702606201171875,
    "duration_minutes": 358.80000000000001136868377216160297393798828125,
    "points": 39,
    "centroid": {
        "lat": 35.1764668000000000347426976077258586883544921875,
        "lon": 35.8935750846153922566372784785926342010498046875
    },
    "bbox": {
        "min_lat": 35.17586000000000012732925824820995330810546875,
        "min_lon": 35.8927316999999987956471159122884273529052734375,
        "max_lat": 35.1767516999999969584678183309733867645263671875,
        "max_lon": 35.89660669999999953461156110279262065887451171875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 23, 2026 19:04 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 16m
  • Data Points: 41 AIS positions
  • Period: 2026-10-23T19:49:44+00:00 to 2026-10-24T02:06:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 376.80000000000001136868377216160297393798828125,
    "points_in_zone": 41,
    "first_point": {
        "ts": "2026-10-23T19:49:44+00:00",
        "lat": 35.17627829999999988785930327139794826507568359375,
        "lon": 35.8929983000000021320374798960983753204345703125
    },
    "last_point": {
        "ts": "2026-10-24T02:06:32+00:00",
        "lat": 35.1764466999999996232872945256531238555908203125,
        "lon": 35.89302500000000151203494169749319553375244140625
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 23, 2026 19:04 UTC 75.0% ▼
  • Duration: 6h 16m
  • Radius: 287 meters
  • Data Points: 41 AIS positions
  • Centroid: 35.1765, 35.8935
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 286.6000000000000227373675443232059478759765625,
    "duration_minutes": 376.80000000000001136868377216160297393798828125,
    "points": 41,
    "centroid": {
        "lat": 35.1764578487804868700550287030637264251708984375,
        "lon": 35.89354532439025291523648775182664394378662109375
    },
    "bbox": {
        "min_lat": 35.17586000000000012732925824820995330810546875,
        "min_lon": 35.8927316999999987956471159122884273529052734375,
        "max_lat": 35.1767516999999969584678183309733867645263671875,
        "max_lon": 35.89660669999999953461156110279262065887451171875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Sts🛰️✗ Central Atlantic Monitoring Zone
Oct 23, 2026 19:00 UTC 70/100 ▼
Vessel A: IMO 9288772 (DIDIMON) Liberia
Vessel B: IMO 9396335 (HISTRIA TIGER) LIBERIA
  • Minimum Distance: 458 meters
  • Average Distance: 464 meters
  • Duration: 1h 51m
  • Period: 2026-10-23T19:00:44+00:00 to 2026-10-23T20:52:40+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 458m, avg 464m) for 112 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 458m, avg 464m
Duration20/25Duration 112 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-24T01:15:14.063445+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 458.19999999999998863131622783839702606201171875,
    "avg_distance_m": 464.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 5.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 111.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 6716,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-10-23T19:00:44+00:00",
        "end": "2026-10-23T20:52:40+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 458m, avg 464m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 112 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 458m, avg 464m) for 112 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.17835620000000318441379931755363941192626953125,
            "lon": 35.89391669999999834317350178025662899017333984375
        },
        "time_window": {
            "start_ts": "2026-10-23T19:00:44+00:00",
            "end_ts": "2026-10-23T20:52:40+00:00"
        },
        "searched_at": "2026-10-24T01:15:14.063445+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 23, 2026 18:15 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 30m
  • Data Points: 40 AIS positions
  • Period: 2026-10-23T18:55:48+00:00 to 2026-10-24T01:26:29+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 390.69999999999998863131622783839702606201171875,
    "points_in_zone": 40,
    "first_point": {
        "ts": "2026-10-23T18:55:48+00:00",
        "lat": 35.17625670000000326353983837179839611053466796875,
        "lon": 35.8929217000000022608219296671450138092041015625
    },
    "last_point": {
        "ts": "2026-10-24T01:26:29+00:00",
        "lat": 35.176586700000001428634277544915676116943359375,
        "lon": 35.89391669999999834317350178025662899017333984375
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 23, 2026 18:15 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 286 meters
  • Data Points: 40 AIS positions
  • Centroid: 35.1764, 35.8936
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 285.6000000000000227373675443232059478759765625,
    "duration_minutes": 390.69999999999998863131622783839702606201171875,
    "points": 40,
    "centroid": {
        "lat": 35.176449254999994309400790371000766754150390625,
        "lon": 35.89355467000001453925506211817264556884765625
    },
    "bbox": {
        "min_lat": 35.17586000000000012732925824820995330810546875,
        "min_lon": 35.8927316999999987956471159122884273529052734375,
        "max_lat": 35.1767516999999969584678183309733867645263671875,
        "max_lon": 35.89660669999999953461156110279262065887451171875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Sts🛰️✗ Central Atlantic Monitoring Zone
Oct 23, 2026 17:27 UTC 70/100 ▼
Vessel A: IMO 9288772 (DIDIMON) Liberia
Vessel B: IMO 9396335 (HISTRIA TIGER) LIBERIA
  • Minimum Distance: 454 meters
  • Average Distance: 462 meters
  • Duration: 1h 33m
  • Period: 2026-10-23T17:27:43+00:00 to 2026-10-23T19:00:44+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Central Atlantic Monitoring Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 454m, avg 462m) for 93 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 454m, avg 462m
Duration20/25Duration 93 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±8m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Central Atlantic Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-23T19:15:04.838934+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636014337,
        "imo": 9288772,
        "name": "DIDIMON",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013848,
        "imo": 9396335,
        "name": "HISTRIA TIGER",
        "flag": "LIBERIA"
    },
    "min_distance_m": 453.80000000000001136868377216160297393798828125,
    "avg_distance_m": 461.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 7.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 93,
    "overlap_duration_s": 5581,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-23T17:27:43+00:00",
        "end": "2026-10-23T19:00:44+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 454m, avg 462m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 93 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very 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: Central Atlantic Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (DIDIMON and HISTRIA TIGER) maintained close proximity (min 454m, avg 462m) for 93 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Central Atlantic Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 35.1782467000000025336703401990234851837158203125,
            "lon": 35.89376279999999752590156276710331439971923828125
        },
        "time_window": {
            "start_ts": "2026-10-23T17:27:43+00:00",
            "end_ts": "2026-10-23T19:00:44+00:00"
        },
        "searched_at": "2026-10-23T19:15:04.838934+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 23, 2026 17:04 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 24m
  • Data Points: 38 AIS positions
  • Period: 2026-10-23T17:46:48+00:00 to 2026-10-24T00:10:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 384.1000000000000227373675443232059478759765625,
    "points_in_zone": 38,
    "first_point": {
        "ts": "2026-10-23T17:46:48+00:00",
        "lat": 35.1762982999999991307049640454351902008056640625,
        "lon": 35.89328330000000022437234292738139629364013671875
    },
    "last_point": {
        "ts": "2026-10-24T00:10:57+00:00",
        "lat": 35.17654999999999887450030655600130558013916015625,
        "lon": 35.8935467000000016923877410590648651123046875
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 23, 2026 17:04 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 295 meters
  • Data Points: 38 AIS positions
  • Centroid: 35.1764, 35.8934
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 295.3999999999999772626324556767940521240234375,
    "duration_minutes": 384.1000000000000227373675443232059478759765625,
    "points": 38,
    "centroid": {
        "lat": 35.17638824736841485218974412418901920318603515625,
        "lon": 35.893427894736845473744324408471584320068359375
    },
    "bbox": {
        "min_lat": 35.17586000000000012732925824820995330810546875,
        "min_lon": 35.8927316999999987956471159122884273529052734375,
        "max_lat": 35.1765917000000030157025321386754512786865234375,
        "max_lon": 35.89660669999999953461156110279262065887451171875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 23, 2026 16:01 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 20m
  • Data Points: 35 AIS positions
  • Period: 2026-10-23T16:46:48+00:00 to 2026-10-23T23:07:34+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 380.80000000000001136868377216160297393798828125,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-10-23T16:46:48+00:00",
        "lat": 35.17641830000000169320628629066050052642822265625,
        "lon": 35.89283669999999659694367437623441219329833984375
    },
    "last_point": {
        "ts": "2026-10-23T23:07:34+00:00",
        "lat": 35.1763432999999992034645401872694492340087890625,
        "lon": 35.89309829999999834626578376628458499908447265625
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 23, 2026 16:01 UTC 75.0% ▼
  • Duration: 6h 20m
  • Radius: 300 meters
  • Data Points: 35 AIS positions
  • Centroid: 35.1763, 35.8934
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 300.3999999999999772626324556767940521240234375,
    "duration_minutes": 380.80000000000001136868377216160297393798828125,
    "points": 35,
    "centroid": {
        "lat": 35.176348285714283292691106908023357391357421875,
        "lon": 35.89336314285714024663320742547512054443359375
    },
    "bbox": {
        "min_lat": 35.17586000000000012732925824820995330810546875,
        "min_lon": 35.8927316999999987956471159122884273529052734375,
        "max_lat": 35.1765917000000030157025321386754512786865234375,
        "max_lon": 35.89660669999999953461156110279262065887451171875
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Monitoring Zone
Oct 23, 2026 14:22 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 6h 22m
  • Data Points: 21 AIS positions
  • Period: 2026-10-23T14:22:45+00:00 to 2026-10-23T20:45:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_150",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 382.3999999999999772626324556767940521240234375,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-10-23T14:22:45+00:00",
        "lat": 35.17622999999999677811501896940171718597412109375,
        "lon": 35.8935383000000030051523935981094837188720703125
    },
    "last_point": {
        "ts": "2026-10-23T20:45:10+00:00",
        "lat": 35.176393300000000863292370922863483428955078125,
        "lon": 35.89312830000000076324795372784137725830078125
    }
}
Methodology: 2026.01.18
Loiter Central Atlantic Monitoring Zone
Oct 23, 2026 14:22 UTC 75.0% ▼
  • Duration: 6h 22m
  • Radius: 35 meters
  • Data Points: 21 AIS positions
  • Centroid: 35.1763, 35.8932
  • Zone: Central Atlantic Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 35,
    "duration_minutes": 382.3999999999999772626324556767940521240234375,
    "points": 21,
    "centroid": {
        "lat": 35.17629007619047598609540727920830249786376953125,
        "lon": 35.89316150476191324969477136619389057159423828125
    },
    "bbox": {
        "min_lat": 35.1761766999999991867298376746475696563720703125,
        "min_lon": 35.89283669999999659694367437623441219329833984375,
        "max_lat": 35.17641830000000169320628629066050052642822265625,
        "max_lon": 35.8935383000000030051523935981094837188720703125
    },
    "zone_id": "discovered_150"
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Oct 26 17:45 35.1769 35.8940 0.0 kn 40.0° Central Atlantic Monitoring Zone
Oct 26 17:40 35.1769 35.8941 0.0 kn 40.0° Central Atlantic Monitoring Zone
Oct 26 13:26 35.1766 35.8944 0.1 kn 40.0° Central Atlantic Monitoring Zone
Oct 26 09:56 35.1766 35.8933 0.0 kn 321.8° Central Atlantic Monitoring Zone
Oct 26 08:38 35.1766 35.8933 0.0 kn 321.8° Central Atlantic Monitoring Zone
Oct 26 06:44 35.1770 35.8923 0.0 kn 321.8° Central Atlantic Monitoring Zone
Oct 26 06:41 35.1770 35.8923 0.0 kn 321.8° Central Atlantic Monitoring Zone
Oct 26 06:38 35.1770 35.8923 0.0 kn 321.8° Central Atlantic Monitoring Zone
Oct 26 06:32 35.1770 35.8923 0.0 kn 321.8° Central Atlantic Monitoring Zone
Oct 26 06:20 35.1770 35.8922 0.0 kn 321.8° Central Atlantic Monitoring Zone
Oct 26 06:14 35.1770 35.8922 0.0 kn 321.8° Central Atlantic Monitoring Zone
Oct 26 05:14 35.1769 35.8928 0.0 kn 321.8° Central Atlantic Monitoring Zone
Oct 26 00:23 35.1765 35.8928 0.0 kn 238.8° Central Atlantic Monitoring Zone
Oct 26 00:08 35.1766 35.8927 0.0 kn 238.8° Central Atlantic Monitoring Zone
Oct 25 23:50 35.1768 35.8925 0.0 kn 238.8° Central Atlantic Monitoring Zone
Oct 25 23:47 35.1768 35.8925 0.0 kn 238.8° Central Atlantic Monitoring Zone
Oct 25 23:32 35.1768 35.8925 0.0 kn 238.8° Central Atlantic Monitoring Zone
Oct 25 23:29 35.1768 35.8925 0.0 kn 238.8° Central Atlantic Monitoring Zone
Oct 25 23:20 35.1768 35.8925 0.0 kn 238.8° Central Atlantic Monitoring Zone
Oct 25 23:11 35.1768 35.8923 0.0 kn 238.8° Central Atlantic Monitoring 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.