NORTHERN OSPREY

IMO 9283459

Vessel information

Vessel Name NORTHERN OSPREY
IMO Number 9283459
MMSI 352005487
Vessel Type Tanker
Flag 🇵🇦 Panama
Call Sign 3E8741
Length 116 m
Beam 15 m

Detected Events (100)

Zone Dwell English Channel Surveillance Zone
Jul 27, 2026 00:04 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 1h 36m
  • Data Points: 16 AIS positions
  • Period: 2026-07-27T00:04:27+00:00 to 2026-07-27T01:40:46+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 96.2999999999999971578290569595992565155029296875,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-07-27T00:04:27+00:00",
        "lat": 51.8372200000000020736479200422763824462890625,
        "lon": 2.915021700000000048902393245953135192394256591796875
    },
    "last_point": {
        "ts": "2026-07-27T01:40:46+00:00",
        "lat": 51.90587500000000176214598468504846096038818359375,
        "lon": 3.301586700000000096366647994727827608585357666015625
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 26, 2026 23:01 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 2h 39m
  • Data Points: 22 AIS positions
  • Period: 2026-07-26T23:01:27+00:00 to 2026-07-27T01:40:46+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 159.30000000000001136868377216160297393798828125,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-07-26T23:01:27+00:00",
        "lat": 51.7656582999999983485395205207169055938720703125,
        "lon": 2.65233499999999988716581356129609048366546630859375
    },
    "last_point": {
        "ts": "2026-07-27T01:40:46+00:00",
        "lat": 51.90587500000000176214598468504846096038818359375,
        "lon": 3.301586700000000096366647994727827608585357666015625
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 26, 2026 19:01 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 13m
  • Data Points: 23 AIS positions
  • Period: 2026-07-26T19:27:48+00:00 to 2026-07-27T01:40:46+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 373,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-07-26T19:27:48+00:00",
        "lat": 51.358963299999999208012013696134090423583984375,
        "lon": 2.12386169999999996349515640758909285068511962890625
    },
    "last_point": {
        "ts": "2026-07-27T01:40:46+00:00",
        "lat": 51.90587500000000176214598468504846096038818359375,
        "lon": 3.301586700000000096366647994727827608585357666015625
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 26, 2026 18:03 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 21 AIS positions
  • Period: 2026-07-26T18:56:07+00:00 to 2026-07-27T01:20:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 384.30000000000001136868377216160297393798828125,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-07-26T18:56:07+00:00",
        "lat": 51.2884983000000005404217517934739589691162109375,
        "lon": 2.110873300000000174492242877022363245487213134765625
    },
    "last_point": {
        "ts": "2026-07-27T01:20:26+00:00",
        "lat": 51.89700169999999701531123719178140163421630859375,
        "lon": 3.23050499999999995992538970313034951686859130859375
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 26, 2026 17:13 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 37m
  • Data Points: 30 AIS positions
  • Period: 2026-07-26T17:51:25+00:00 to 2026-07-27T00:28:46+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 397.3999999999999772626324556767940521240234375,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-07-26T17:51:25+00:00",
        "lat": 51.1896550000000019053914002142846584320068359375,
        "lon": 1.97216170000000001749640432535670697689056396484375
    },
    "last_point": {
        "ts": "2026-07-27T00:28:46+00:00",
        "lat": 51.858609999999998763087205588817596435546875,
        "lon": 3.02062499999999989341858963598497211933135986328125
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 26, 2026 16:00 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 19m
  • Data Points: 29 AIS positions
  • Period: 2026-07-26T16:42:08+00:00 to 2026-07-26T23:01:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 379.30000000000001136868377216160297393798828125,
    "points_in_zone": 29,
    "first_point": {
        "ts": "2026-07-26T16:42:08+00:00",
        "lat": 51.10489830000000210930011235177516937255859375,
        "lon": 1.7670033000000000544815748071414418518543243408203125
    },
    "last_point": {
        "ts": "2026-07-26T23:01:27+00:00",
        "lat": 51.7656582999999983485395205207169055938720703125,
        "lon": 2.65233499999999988716581356129609048366546630859375
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 26, 2026 15:46 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 3h 41m
  • Data Points: 32 AIS positions
  • Period: 2026-07-26T15:46:27+00:00 to 2026-07-26T19:27:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 221.30000000000001136868377216160297393798828125,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-07-26T15:46:27+00:00",
        "lat": 51.01663330000000229347278946079313755035400390625,
        "lon": 1.624646699999999999164401742746122181415557861328125
    },
    "last_point": {
        "ts": "2026-07-26T19:27:48+00:00",
        "lat": 51.358963299999999208012013696134090423583984375,
        "lon": 2.12386169999999996349515640758909285068511962890625
    }
}
Methodology: 2026.01.18
Ais Gap🛰️✗ English Channel Monitoring Zone
Jul 26, 2026 11:40 UTC 70.0% ▼
  • Gap Duration: 4h 5m
  • Last Seen: 2026-07-26T11:40:41+00:00 at 50.5620, 1.0910 (Zone: English Channel Monitoring Zone)
  • Next Seen: 2026-07-26T15:46:27+00:00 at 51.0166, 1.6246

🛰️ Gap Corroboration

✗ No Imagery

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

SAR Imagery (Sentinel-1)

Status: ✗ No SAR coverage

No Sentinel-1 scenes covering corridor and time window

VIIRS Thermal Anomaly

Status: ✗ No detections

No VIIRS thermal/light detections in corridor

Searched: 2026-07-26T16:00:01.534674+00:00

Show Raw Evidence JSON
{
    "gap_minutes": 245.80000000000001136868377216160297393798828125,
    "last_seen": {
        "ts": "2026-07-26T11:40:41+00:00",
        "lat": 50.56199670000000168101905728690326213836669921875,
        "lon": 1.0909999999999999698019337301957421004772186279296875,
        "sog": 8.699999999999999289457264239899814128875732421875,
        "zone_id": "discovered_143"
    },
    "next_seen": {
        "ts": "2026-07-26T15:46:27+00:00",
        "lat": 51.01663330000000229347278946079313755035400390625,
        "lon": 1.624646699999999999164401742746122181415557861328125,
        "zone_ids": [
            "discovered_004"
        ]
    },
    "gap_enrichment": {
        "status": "not_found",
        "corridor": {
            "start": {
                "lat": 50.56199670000000168101905728690326213836669921875,
                "lon": 1.0909999999999999698019337301957421004772186279296875,
                "ts": "2026-07-26T11:40:41+00:00"
            },
            "end": {
                "lat": 51.01663330000000229347278946079313755035400390625,
                "lon": 1.624646699999999999164401742746122181415557861328125,
                "ts": "2026-07-26T15:46:27+00:00"
            },
            "bbox": {
                "min_lat": 50.3818169999999980745997163467109203338623046875,
                "min_lon": 0.80598300000000000498090457767830230295658111572265625,
                "max_lat": 51.19681299999999879446477279998362064361572265625,
                "max_lon": 1.9096640000000000281232814813847653567790985107421875
            },
            "buffer_km": 20
        },
        "sar": {
            "status": "not_found",
            "notes": "No Sentinel-1 scenes covering corridor and time window"
        },
        "viirs": {
            "status": "not_found",
            "notes": "No VIIRS thermal\/light detections in corridor"
        },
        "searched_at": "2026-07-26T16:00:01.534674+00:00"
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Monitoring Zone
Jul 26, 2026 10:08 UTC 80.0% ▼
  • Zone: English Channel Monitoring Zone
  • Duration: 1h 32m
  • Data Points: 4 AIS positions
  • Period: 2026-07-26T10:08:29+00:00 to 2026-07-26T11:40:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_143",
    "zone_name": "English Channel Monitoring Zone",
    "dwell_minutes": 92.2000000000000028421709430404007434844970703125,
    "points_in_zone": 4,
    "first_point": {
        "ts": "2026-07-26T10:08:29+00:00",
        "lat": 50.4724250000000012050804798491299152374267578125,
        "lon": 0.771651700000000051460347094689495861530303955078125
    },
    "last_point": {
        "ts": "2026-07-26T11:40:41+00:00",
        "lat": 50.56199670000000168101905728690326213836669921875,
        "lon": 1.0909999999999999698019337301957421004772186279296875
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Monitoring Zone
Jul 26, 2026 09:02 UTC 80.0% ▼
  • Zone: English Channel Monitoring Zone
  • Duration: 2h 38m
  • Data Points: 17 AIS positions
  • Period: 2026-07-26T09:02:19+00:00 to 2026-07-26T11:40:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_143",
    "zone_name": "English Channel Monitoring Zone",
    "dwell_minutes": 158.400000000000005684341886080801486968994140625,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-07-26T09:02:19+00:00",
        "lat": 50.4284099999999995134203345514833927154541015625,
        "lon": 0.5225699999999999789679350215010344982147216796875
    },
    "last_point": {
        "ts": "2026-07-26T11:40:41+00:00",
        "lat": 50.56199670000000168101905728690326213836669921875,
        "lon": 1.0909999999999999698019337301957421004772186279296875
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Monitoring Zone
Jul 26, 2026 08:08 UTC 80.0% ▼
  • Zone: English Channel Monitoring Zone
  • Duration: 3h 31m
  • Data Points: 36 AIS positions
  • Period: 2026-07-26T08:08:57+00:00 to 2026-07-26T11:40:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_143",
    "zone_name": "English Channel Monitoring Zone",
    "dwell_minutes": 211.69999999999998863131622783839702606201171875,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-07-26T08:08:57+00:00",
        "lat": 50.39415999999999939973349682986736297607421875,
        "lon": 0.318043299999999973248776541367988102138042449951171875
    },
    "last_point": {
        "ts": "2026-07-26T11:40:41+00:00",
        "lat": 50.56199670000000168101905728690326213836669921875,
        "lon": 1.0909999999999999698019337301957421004772186279296875
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Monitoring Zone
Jul 26, 2026 07:54 UTC 80.0% ▼
  • Zone: English Channel Monitoring Zone
  • Duration: 3h 46m
  • Data Points: 39 AIS positions
  • Period: 2026-07-26T07:54:25+00:00 to 2026-07-26T11:40:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_143",
    "zone_name": "English Channel Monitoring Zone",
    "dwell_minutes": 226.30000000000001136868377216160297393798828125,
    "points_in_zone": 39,
    "first_point": {
        "ts": "2026-07-26T07:54:25+00:00",
        "lat": 50.384624999999999772626324556767940521240234375,
        "lon": 0.262018299999999981775289370489190332591533660888671875
    },
    "last_point": {
        "ts": "2026-07-26T11:40:41+00:00",
        "lat": 50.56199670000000168101905728690326213836669921875,
        "lon": 1.0909999999999999698019337301957421004772186279296875
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 26, 2026 06:02 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 1h 55m
  • Data Points: 49 AIS positions
  • Period: 2026-07-26T06:02:18+00:00 to 2026-07-26T07:57:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 115.2000000000000028421709430404007434844970703125,
    "points_in_zone": 49,
    "first_point": {
        "ts": "2026-07-26T06:02:18+00:00",
        "lat": 50.3017482999999998583007254637777805328369140625,
        "lon": -0.228654999999999997140065488565596751868724822998046875
    },
    "last_point": {
        "ts": "2026-07-26T07:57:27+00:00",
        "lat": 50.3866282999999981484506861306726932525634765625,
        "lon": 0.273444999999999993622878946553100831806659698486328125
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 26, 2026 05:02 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 2h 54m
  • Data Points: 75 AIS positions
  • Period: 2026-07-26T05:02:45+00:00 to 2026-07-26T07:57:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 174.69999999999998863131622783839702606201171875,
    "points_in_zone": 75,
    "first_point": {
        "ts": "2026-07-26T05:02:45+00:00",
        "lat": 50.2533949999999975943865138106048107147216796875,
        "lon": -0.50898670000000001412132633049623109400272369384765625
    },
    "last_point": {
        "ts": "2026-07-26T07:57:27+00:00",
        "lat": 50.3866282999999981484506861306726932525634765625,
        "lon": 0.273444999999999993622878946553100831806659698486328125
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 26, 2026 04:02 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 3h 54m
  • Data Points: 92 AIS positions
  • Period: 2026-07-26T04:02:36+00:00 to 2026-07-26T07:57:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 234.80000000000001136868377216160297393798828125,
    "points_in_zone": 92,
    "first_point": {
        "ts": "2026-07-26T04:02:36+00:00",
        "lat": 50.2042466999999987820046953856945037841796875,
        "lon": -0.7843267000000000432891056334483437240123748779296875
    },
    "last_point": {
        "ts": "2026-07-26T07:57:27+00:00",
        "lat": 50.3866282999999981484506861306726932525634765625,
        "lon": 0.273444999999999993622878946553100831806659698486328125
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 26, 2026 03:40 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 4h 17m
  • Data Points: 98 AIS positions
  • Period: 2026-07-26T03:40:16+00:00 to 2026-07-26T07:57:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 257.19999999999998863131622783839702606201171875,
    "points_in_zone": 98,
    "first_point": {
        "ts": "2026-07-26T03:40:16+00:00",
        "lat": 50.1868649999999973942976794205605983734130859375,
        "lon": -0.883326700000000020196466721245087683200836181640625
    },
    "last_point": {
        "ts": "2026-07-26T07:57:27+00:00",
        "lat": 50.3866282999999981484506861306726932525634765625,
        "lon": 0.273444999999999993622878946553100831806659698486328125
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 24, 2026 02:00 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 1h 31m
  • Data Points: 23 AIS positions
  • Period: 2026-07-24T02:00:29+00:00 to 2026-07-24T03:31:40+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 91.2000000000000028421709430404007434844970703125,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-07-24T02:00:29+00:00",
        "lat": 50.34195170000000274512785836122930049896240234375,
        "lon": -1.3936732999999998927620481481426395475864410400390625
    },
    "last_point": {
        "ts": "2026-07-24T03:31:40+00:00",
        "lat": 50.35178830000000260724846157245337963104248046875,
        "lon": -1.6657116999999999062964661789010278880596160888671875
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 24, 2026 01:01 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 2h 30m
  • Data Points: 35 AIS positions
  • Period: 2026-07-24T01:01:20+00:00 to 2026-07-24T03:31:40+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 150.30000000000001136868377216160297393798828125,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-07-24T01:01:20+00:00",
        "lat": 50.338200000000000500222085975110530853271484375,
        "lon": -1.2299466999999999483605961358989588916301727294921875
    },
    "last_point": {
        "ts": "2026-07-24T03:31:40+00:00",
        "lat": 50.35178830000000260724846157245337963104248046875,
        "lon": -1.6657116999999999062964661789010278880596160888671875
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 24, 2026 00:02 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 3h 29m
  • Data Points: 51 AIS positions
  • Period: 2026-07-24T00:02:28+00:00 to 2026-07-24T03:31:40+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 209.19999999999998863131622783839702606201171875,
    "points_in_zone": 51,
    "first_point": {
        "ts": "2026-07-24T00:02:28+00:00",
        "lat": 50.36539499999999947021933621726930141448974609375,
        "lon": -1.0666583000000000591711568631581030786037445068359375
    },
    "last_point": {
        "ts": "2026-07-24T03:31:40+00:00",
        "lat": 50.35178830000000260724846157245337963104248046875,
        "lon": -1.6657116999999999062964661789010278880596160888671875
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 23, 2026 23:02 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 4h 29m
  • Data Points: 64 AIS positions
  • Period: 2026-07-23T23:02:29+00:00 to 2026-07-24T03:31:40+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 269.19999999999998863131622783839702606201171875,
    "points_in_zone": 64,
    "first_point": {
        "ts": "2026-07-23T23:02:29+00:00",
        "lat": 50.3915300000000030422597774304449558258056640625,
        "lon": -0.90014000000000005119460411151521839201450347900390625
    },
    "last_point": {
        "ts": "2026-07-24T03:31:40+00:00",
        "lat": 50.35178830000000260724846157245337963104248046875,
        "lon": -1.6657116999999999062964661789010278880596160888671875
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 23, 2026 22:03 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 5h 28m
  • Data Points: 78 AIS positions
  • Period: 2026-07-23T22:03:30+00:00 to 2026-07-24T03:31:40+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 328.19999999999998863131622783839702606201171875,
    "points_in_zone": 78,
    "first_point": {
        "ts": "2026-07-23T22:03:30+00:00",
        "lat": 50.42258170000000205845935852266848087310791015625,
        "lon": -0.706045000000000033679725675028748810291290283203125
    },
    "last_point": {
        "ts": "2026-07-24T03:31:40+00:00",
        "lat": 50.35178830000000260724846157245337963104248046875,
        "lon": -1.6657116999999999062964661789010278880596160888671875
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 23, 2026 21:01 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 6h 30m
  • Data Points: 96 AIS positions
  • Period: 2026-07-23T21:01:09+00:00 to 2026-07-24T03:31:40+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 390.5,
    "points_in_zone": 96,
    "first_point": {
        "ts": "2026-07-23T21:01:09+00:00",
        "lat": 50.45695330000000211612132261507213115692138671875,
        "lon": -0.50234670000000003486917421469115652143955230712890625
    },
    "last_point": {
        "ts": "2026-07-24T03:31:40+00:00",
        "lat": 50.35178830000000260724846157245337963104248046875,
        "lon": -1.6657116999999999062964661789010278880596160888671875
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 23, 2026 20:03 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 6h 34m
  • Data Points: 98 AIS positions
  • Period: 2026-07-23T20:50:40+00:00 to 2026-07-24T03:25:00+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 394.30000000000001136868377216160297393798828125,
    "points_in_zone": 98,
    "first_point": {
        "ts": "2026-07-23T20:50:40+00:00",
        "lat": 50.46202170000000108984750113449990749359130859375,
        "lon": -0.468625000000000013766765505351941101253032684326171875
    },
    "last_point": {
        "ts": "2026-07-24T03:25:00+00:00",
        "lat": 50.350363299999997934719431214034557342529296875,
        "lon": -1.6444199999999999928235183688229881227016448974609375
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 23, 2026 19:02 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 6h 30m
  • Data Points: 101 AIS positions
  • Period: 2026-07-23T19:42:20+00:00 to 2026-07-24T02:13:00+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 390.69999999999998863131622783839702606201171875,
    "points_in_zone": 101,
    "first_point": {
        "ts": "2026-07-23T19:42:20+00:00",
        "lat": 50.49547170000000306799847749061882495880126953125,
        "lon": -0.260583300000000017693224663162254728376865386962890625
    },
    "last_point": {
        "ts": "2026-07-24T02:13:00+00:00",
        "lat": 50.34157499999999885176293901167809963226318359375,
        "lon": -1.4305033000000000331652927343384362757205963134765625
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 23, 2026 18:00 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 6h 34m
  • Data Points: 106 AIS positions
  • Period: 2026-07-23T18:51:29+00:00 to 2026-07-24T01:25:49+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 394.30000000000001136868377216160297393798828125,
    "points_in_zone": 106,
    "first_point": {
        "ts": "2026-07-23T18:51:29+00:00",
        "lat": 50.52249330000000071549948188476264476776123046875,
        "lon": -0.11253670000000000339657191261721891351044178009033203125
    },
    "last_point": {
        "ts": "2026-07-24T01:25:49+00:00",
        "lat": 50.34103669999999652873157174326479434967041015625,
        "lon": -1.2966800000000000547828449271037243306636810302734375
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 23, 2026 17:01 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 6h 35m
  • Data Points: 110 AIS positions
  • Period: 2026-07-23T17:51:20+00:00 to 2026-07-24T00:26:19+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 395,
    "points_in_zone": 110,
    "first_point": {
        "ts": "2026-07-23T17:51:20+00:00",
        "lat": 50.5553799999999995407051756046712398529052734375,
        "lon": 0.0716916999999999970949460248448303900659084320068359375
    },
    "last_point": {
        "ts": "2026-07-24T00:26:19+00:00",
        "lat": 50.35571999999999803776518092490732669830322265625,
        "lon": -1.132698299999999935749883661628700792789459228515625
    }
}
Methodology: 2026.01.18
Zone Dwell Malacca Strait Sanctioned Vessel Zone
Jul 23, 2026 16:40 UTC 80.0% ▼
  • Zone: Malacca Strait Sanctioned Vessel Zone
  • Duration: 6h 37m
  • Data Points: 110 AIS positions
  • Period: 2026-07-23T16:51:50+00:00 to 2026-07-23T23:29:08+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_131",
    "zone_name": "Malacca Strait Sanctioned Vessel Zone",
    "dwell_minutes": 397.30000000000001136868377216160297393798828125,
    "points_in_zone": 110,
    "first_point": {
        "ts": "2026-07-23T16:51:50+00:00",
        "lat": 50.58257669999999706078597228042781352996826171875,
        "lon": 0.248989999999999989110932574476464651525020599365234375
    },
    "last_point": {
        "ts": "2026-07-23T23:29:08+00:00",
        "lat": 50.37902170000000268146322923712432384490966796875,
        "lon": -0.9751417000000000001591615728102624416351318359375
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Monitoring Zone
Jul 23, 2026 15:03 UTC 80.0% ▼
  • Zone: English Channel Monitoring Zone
  • Duration: 1h 55m
  • Data Points: 30 AIS positions
  • Period: 2026-07-23T15:03:00+00:00 to 2026-07-23T16:58:49+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_143",
    "zone_name": "English Channel Monitoring Zone",
    "dwell_minutes": 115.7999999999999971578290569595992565155029296875,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-07-23T15:03:00+00:00",
        "lat": 50.64792829999999668189047952182590961456298828125,
        "lon": 0.597304999999999974846787154092453420162200927734375
    },
    "last_point": {
        "ts": "2026-07-23T16:58:49+00:00",
        "lat": 50.5793383000000034144250093959271907806396484375,
        "lon": 0.2289316999999999879822354387215455062687397003173828125
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Monitoring Zone
Jul 23, 2026 14:01 UTC 80.0% ▼
  • Zone: English Channel Monitoring Zone
  • Duration: 2h 57m
  • Data Points: 50 AIS positions
  • Period: 2026-07-23T14:01:50+00:00 to 2026-07-23T16:58:49+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_143",
    "zone_name": "English Channel Monitoring Zone",
    "dwell_minutes": 177,
    "points_in_zone": 50,
    "first_point": {
        "ts": "2026-07-23T14:01:50+00:00",
        "lat": 50.72961670000000111713234218768775463104248046875,
        "lon": 0.7731500000000000039079850466805510222911834716796875
    },
    "last_point": {
        "ts": "2026-07-23T16:58:49+00:00",
        "lat": 50.5793383000000034144250093959271907806396484375,
        "lon": 0.2289316999999999879822354387215455062687397003173828125
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Monitoring Zone
Jul 23, 2026 13:05 UTC 80.0% ▼
  • Zone: English Channel Monitoring Zone
  • Duration: 3h 53m
  • Data Points: 67 AIS positions
  • Period: 2026-07-23T13:05:19+00:00 to 2026-07-23T16:58:49+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_143",
    "zone_name": "English Channel Monitoring Zone",
    "dwell_minutes": 233.5,
    "points_in_zone": 67,
    "first_point": {
        "ts": "2026-07-23T13:05:19+00:00",
        "lat": 50.7995216999999996687620296142995357513427734375,
        "lon": 0.9323683000000000387075260732672177255153656005859375
    },
    "last_point": {
        "ts": "2026-07-23T16:58:49+00:00",
        "lat": 50.5793383000000034144250093959271907806396484375,
        "lon": 0.2289316999999999879822354387215455062687397003173828125
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Monitoring Zone
Jul 23, 2026 12:15 UTC 80.0% ▼
  • Zone: English Channel Monitoring Zone
  • Duration: 4h 43m
  • Data Points: 82 AIS positions
  • Period: 2026-07-23T12:15:09+00:00 to 2026-07-23T16:58:49+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_143",
    "zone_name": "English Channel Monitoring Zone",
    "dwell_minutes": 283.69999999999998863131622783839702606201171875,
    "points_in_zone": 82,
    "first_point": {
        "ts": "2026-07-23T12:15:09+00:00",
        "lat": 50.8721249999999969304553815163671970367431640625,
        "lon": 1.08538669999999992654693414806388318538665771484375
    },
    "last_point": {
        "ts": "2026-07-23T16:58:49+00:00",
        "lat": 50.5793383000000034144250093959271907806396484375,
        "lon": 0.2289316999999999879822354387215455062687397003173828125
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 22, 2026 07:01 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 1h 35m
  • Data Points: 69 AIS positions
  • Period: 2026-07-22T07:01:06+00:00 to 2026-07-22T08:36:47+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 95.7000000000000028421709430404007434844970703125,
    "points_in_zone": 69,
    "first_point": {
        "ts": "2026-07-22T07:01:06+00:00",
        "lat": 51.36504000000000047521098167635500431060791015625,
        "lon": 3.030738299999999885159240875509567558765411376953125
    },
    "last_point": {
        "ts": "2026-07-22T08:36:47+00:00",
        "lat": 51.378316699999999173087417148053646087646484375,
        "lon": 2.6432117000000001638682078919373452663421630859375
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 22, 2026 06:01 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 2h 35m
  • Data Points: 115 AIS positions
  • Period: 2026-07-22T06:01:26+00:00 to 2026-07-22T08:36:47+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 155.30000000000001136868377216160297393798828125,
    "points_in_zone": 115,
    "first_point": {
        "ts": "2026-07-22T06:01:26+00:00",
        "lat": 51.34431000000000011596057447604835033416748046875,
        "lon": 3.195345000000000101891828307998366653919219970703125
    },
    "last_point": {
        "ts": "2026-07-22T08:36:47+00:00",
        "lat": 51.378316699999999173087417148053646087646484375,
        "lon": 2.6432117000000001638682078919373452663421630859375
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 22, 2026 05:03 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 3h 33m
  • Data Points: 128 AIS positions
  • Period: 2026-07-22T05:03:04+00:00 to 2026-07-22T08:36:47+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 213.69999999999998863131622783839702606201171875,
    "points_in_zone": 128,
    "first_point": {
        "ts": "2026-07-22T05:03:04+00:00",
        "lat": 51.3444132999999993671735865063965320587158203125,
        "lon": 3.195238300000000197798044609953649342060089111328125
    },
    "last_point": {
        "ts": "2026-07-22T08:36:47+00:00",
        "lat": 51.378316699999999173087417148053646087646484375,
        "lon": 2.6432117000000001638682078919373452663421630859375
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 22, 2026 04:51 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 3h 45m
  • Data Points: 131 AIS positions
  • Period: 2026-07-22T04:51:04+00:00 to 2026-07-22T08:36:47+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 225.69999999999998863131622783839702606201171875,
    "points_in_zone": 131,
    "first_point": {
        "ts": "2026-07-22T04:51:04+00:00",
        "lat": 51.3443917000000027428541216067969799041748046875,
        "lon": 3.195234999999999825348595550167374312877655029296875
    },
    "last_point": {
        "ts": "2026-07-22T08:36:47+00:00",
        "lat": 51.378316699999999173087417148053646087646484375,
        "lon": 2.6432117000000001638682078919373452663421630859375
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 22, 2026 04:51 UTC 75.0% ▼
  • Duration: 1h 30m
  • Radius: 1,055 meters
  • Data Points: 27 AIS positions
  • Centroid: 51.3450, 3.1968
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 1054.59999999999990905052982270717620849609375,
    "duration_minutes": 90.7000000000000028421709430404007434844970703125,
    "points": 27,
    "centroid": {
        "lat": 51.34496901111111100135531160049140453338623046875,
        "lon": 3.196816418518518165825526011758483946323394775390625
    },
    "bbox": {
        "min_lat": 51.343795000000000072759576141834259033203125,
        "min_lon": 3.195218300000000066773964135791175067424774169921875,
        "max_lat": 51.35303499999999843339537619613111019134521484375,
        "max_lon": 3.2068633000000001942453309311531484127044677734375
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 17, 2026 06:01 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 1h 3m
  • Data Points: 23 AIS positions
  • Period: 2026-07-17T06:01:25+00:00 to 2026-07-17T07:04:45+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 63.2999999999999971578290569595992565155029296875,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-07-17T06:01:25+00:00",
        "lat": 52.75679000000000229420038522221148014068603515625,
        "lon": 2.6944900000000000517275111633352935314178466796875
    },
    "last_point": {
        "ts": "2026-07-17T07:04:45+00:00",
        "lat": 52.97325000000000017053025658242404460906982421875,
        "lon": 2.69433170000000021815367290400899946689605712890625
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 17, 2026 05:45 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 1h 19m
  • Data Points: 27 AIS positions
  • Period: 2026-07-17T05:45:14+00:00 to 2026-07-17T07:04:45+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 79.5,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-07-17T05:45:14+00:00",
        "lat": 52.69863000000000141653799801133573055267333984375,
        "lon": 2.69771669999999996747419572784565389156341552734375
    },
    "last_point": {
        "ts": "2026-07-17T07:04:45+00:00",
        "lat": 52.97325000000000017053025658242404460906982421875,
        "lon": 2.69433170000000021815367290400899946689605712890625
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 17, 2026 04:08 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 2h 56m
  • Data Points: 28 AIS positions
  • Period: 2026-07-17T04:08:15+00:00 to 2026-07-17T07:04:45+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 176.5,
    "points_in_zone": 28,
    "first_point": {
        "ts": "2026-07-17T04:08:15+00:00",
        "lat": 52.344515000000001236912794411182403564453125,
        "lon": 2.71305830000000014479155652225017547607421875
    },
    "last_point": {
        "ts": "2026-07-17T07:04:45+00:00",
        "lat": 52.97325000000000017053025658242404460906982421875,
        "lon": 2.69433170000000021815367290400899946689605712890625
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 17, 2026 03:19 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 3h 45m
  • Data Points: 30 AIS positions
  • Period: 2026-07-17T03:19:17+00:00 to 2026-07-17T07:04:45+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 225.5,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-07-17T03:19:17+00:00",
        "lat": 52.1652916999999973768353811465203762054443359375,
        "lon": 2.691511699999999951415929899667389690876007080078125
    },
    "last_point": {
        "ts": "2026-07-17T07:04:45+00:00",
        "lat": 52.97325000000000017053025658242404460906982421875,
        "lon": 2.69433170000000021815367290400899946689605712890625
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 17, 2026 02:00 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 5h 4m
  • Data Points: 34 AIS positions
  • Period: 2026-07-17T02:00:25+00:00 to 2026-07-17T07:04:45+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 304.30000000000001136868377216160297393798828125,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-07-17T02:00:25+00:00",
        "lat": 51.9477499999999992041921359486877918243408203125,
        "lon": 2.455403299999999955360863168607465922832489013671875
    },
    "last_point": {
        "ts": "2026-07-17T07:04:45+00:00",
        "lat": 52.97325000000000017053025658242404460906982421875,
        "lon": 2.69433170000000021815367290400899946689605712890625
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 17, 2026 01:39 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 5h 25m
  • Data Points: 40 AIS positions
  • Period: 2026-07-17T01:39:25+00:00 to 2026-07-17T07:04:45+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 325.30000000000001136868377216160297393798828125,
    "points_in_zone": 40,
    "first_point": {
        "ts": "2026-07-17T01:39:25+00:00",
        "lat": 51.890850000000000363797880709171295166015625,
        "lon": 2.3828466999999999842430042917840182781219482421875
    },
    "last_point": {
        "ts": "2026-07-17T07:04:45+00:00",
        "lat": 52.97325000000000017053025658242404460906982421875,
        "lon": 2.69433170000000021815367290400899946689605712890625
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 17, 2026 00:02 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 29m
  • Data Points: 46 AIS positions
  • Period: 2026-07-17T00:34:54+00:00 to 2026-07-17T07:04:45+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 389.8999999999999772626324556767940521240234375,
    "points_in_zone": 46,
    "first_point": {
        "ts": "2026-07-17T00:34:54+00:00",
        "lat": 51.72350000000000136424205265939235687255859375,
        "lon": 2.177325000000000176925141204264946281909942626953125
    },
    "last_point": {
        "ts": "2026-07-17T07:04:45+00:00",
        "lat": 52.97325000000000017053025658242404460906982421875,
        "lon": 2.69433170000000021815367290400899946689605712890625
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 23:00 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 46 AIS positions
  • Period: 2026-07-16T23:55:27+00:00 to 2026-07-17T06:28:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 46,
    "first_point": {
        "ts": "2026-07-16T23:55:27+00:00",
        "lat": 51.63864670000000245408955379389226436614990234375,
        "lon": 2.049514999999999975699438437004573643207550048828125
    },
    "last_point": {
        "ts": "2026-07-17T06:28:25+00:00",
        "lat": 52.851218299999999317151377908885478973388671875,
        "lon": 2.67340499999999980929032972198911011219024658203125
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 22:16 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 5h 51m
  • Data Points: 58 AIS positions
  • Period: 2026-07-16T22:16:43+00:00 to 2026-07-17T04:08:15+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 351.5,
    "points_in_zone": 58,
    "first_point": {
        "ts": "2026-07-16T22:16:43+00:00",
        "lat": 51.504473300000000790532794781029224395751953125,
        "lon": 1.7932699999999999196376165855326689779758453369140625
    },
    "last_point": {
        "ts": "2026-07-17T04:08:15+00:00",
        "lat": 52.344515000000001236912794411182403564453125,
        "lon": 2.71305830000000014479155652225017547607421875
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 21:51 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 17m
  • Data Points: 59 AIS positions
  • Period: 2026-07-16T21:51:14+00:00 to 2026-07-17T04:08:15+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 377,
    "points_in_zone": 59,
    "first_point": {
        "ts": "2026-07-16T21:51:14+00:00",
        "lat": 51.5127032999999983076122589409351348876953125,
        "lon": 1.798624999999999918287585387588478624820709228515625
    },
    "last_point": {
        "ts": "2026-07-17T04:08:15+00:00",
        "lat": 52.344515000000001236912794411182403564453125,
        "lon": 2.71305830000000014479155652225017547607421875
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 17:05 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 37m
  • Data Points: 33 AIS positions
  • Period: 2026-07-16T17:11:05+00:00 to 2026-07-16T23:48:16+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 397.19999999999998863131622783839702606201171875,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-07-16T17:11:05+00:00",
        "lat": 51.51585829999999788242348586209118366241455078125,
        "lon": 1.786788299999999996003907654085196554660797119140625
    },
    "last_point": {
        "ts": "2026-07-16T23:48:16+00:00",
        "lat": 51.62384829999999880101313465274870395660400390625,
        "lon": 2.026701699999999828349928066018037497997283935546875
    }
}
Methodology: 2026.01.18
Sts English Channel Surveillance Zone
Jul 16, 2026 16:23 UTC 80/100 ▼
Vessel A: IMO 9421324 (PRAGUE) Liberia
Vessel B: IMO 9283459 (NORTHERN OSPREY) Panama
  • Minimum Distance: 21 meters
  • Average Distance: 24 meters
  • Duration: 51 minutes
  • Period: 2026-07-16T16:34:30+00:00 to 2026-07-16T17:25:29+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: English Channel Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (PRAGUE and NORTHERN OSPREY) maintained close proximity (min 21m, avg 24m) for 51 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 English Channel Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 21m, avg 24m
Duration10/25Duration 51 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636023238,
        "imo": 9421324,
        "name": "PRAGUE",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 352005487,
        "imo": 9283459,
        "name": "NORTHERN OSPREY",
        "flag": "Panama"
    },
    "min_distance_m": 21.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 24.199999999999999289457264239899814128875732421875,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 51,
    "overlap_duration_s": 3059,
    "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": "2026-07-16T16:34:30+00:00",
        "end": "2026-07-16T17:25:29+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 21m, avg 24m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 51 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: English Channel Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (PRAGUE and NORTHERN OSPREY) maintained close proximity (min 21m, avg 24m) for 51 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 English Channel Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 16:01 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 37m
  • Data Points: 30 AIS positions
  • Period: 2026-07-16T16:41:05+00:00 to 2026-07-16T23:18:12+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 397.1000000000000227373675443232059478759765625,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-07-16T16:41:05+00:00",
        "lat": 51.5161250000000023874235921539366245269775390625,
        "lon": 1.7868432999999999122309191079693846404552459716796875
    },
    "last_point": {
        "ts": "2026-07-16T23:18:12+00:00",
        "lat": 51.56440330000000216159605770371854305267333984375,
        "lon": 1.9287449999999999317168430934543721377849578857421875
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 16, 2026 16:01 UTC 75.0% ▼
  • Duration: 5h 49m
  • Radius: 829 meters
  • Data Points: 13 AIS positions
  • Centroid: 51.5158, 1.7878
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 828.8999999999999772626324556767940521240234375,
    "duration_minutes": 349.5,
    "points": 13,
    "centroid": {
        "lat": 51.51578511538460958263385691680014133453369140625,
        "lon": 1.7877543461538463187565639600506983697414398193359375
    },
    "bbox": {
        "min_lat": 51.5127032999999983076122589409351348876953125,
        "min_lon": 1.786729999999999929372052065446041524410247802734375,
        "max_lat": 51.51619500000000329009708366356790065765380859375,
        "max_lon": 1.798624999999999918287585387588478624820709228515625
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Sts English Channel Surveillance Zone
Jul 16, 2026 15:33 UTC 84/100 ▼
Vessel A: IMO 9283459 (NORTHERN OSPREY) Panama
Vessel B: IMO 9421324 (PRAGUE) Liberia
  • Minimum Distance: 21 meters
  • Average Distance: 47 meters
  • Duration: 1h 43m
  • Period: 2026-07-16T15:33:10+00:00 to 2026-07-16T17:17:06+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: English Channel Surveillance Zone

Confidence Analysis

Score: 84/100

High-confidence STS candidate. Two tankers (NORTHERN OSPREY and PRAGUE) maintained close proximity (min 21m, avg 47m) for 104 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in English Channel Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 21m, avg 47m
Duration20/25Duration 104 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency12/15Distance variance ±50m
Isolation5/10Isolation data not available
Context5/5In monitored zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352005487,
        "imo": 9283459,
        "name": "NORTHERN OSPREY",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636023238,
        "imo": 9421324,
        "name": "PRAGUE",
        "flag": "Liberia"
    },
    "min_distance_m": 21.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 46.7000000000000028421709430404007434844970703125,
    "distance_consistency_m": 49.7999999999999971578290569595992565155029296875,
    "duration_minutes": 103.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 6236,
    "speed_a_avg": 0.1700000000000000122124532708767219446599483489990234375,
    "speed_a_std": 0.38000000000000000444089209850062616169452667236328125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1700000000000000122124532708767219446599483489990234375,
            "max_sog": 1.399999999999999911182158029987476766109466552734375
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-07-16T15:33:10+00:00",
        "end": "2026-07-16T17:17:06+00:00"
    },
    "points_count": {
        "vessel_a": 20,
        "vessel_b": 20
    },
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "score": {
        "value": 84,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 21m, avg 47m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 104 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; stable speeds"
            },
            "distance_consistency": {
                "score": 12,
                "max": 15,
                "detail": "Distance variance \u00b150m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: English Channel Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NORTHERN OSPREY and PRAGUE) maintained close proximity (min 21m, avg 47m) for 104 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in English Channel Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 16, 2026 15:19 UTC 75.0% ▼
  • Duration: 6h 29m
  • Radius: 839 meters
  • Data Points: 24 AIS positions
  • Centroid: 51.5167, 1.7883
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 839.1000000000000227373675443232059478759765625,
    "duration_minutes": 389.19999999999998863131622783839702606201171875,
    "points": 24,
    "centroid": {
        "lat": 51.51665290833333443742958479560911655426025390625,
        "lon": 1.7883278375000000171013425642740912735462188720703125
    },
    "bbox": {
        "min_lat": 51.5127032999999983076122589409351348876953125,
        "min_lon": 1.786729999999999929372052065446041524410247802734375,
        "max_lat": 51.5209899999999976216713548637926578521728515625,
        "max_lon": 1.798624999999999918287585387588478624820709228515625
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 15:05 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 21 AIS positions
  • Period: 2026-07-16T15:56:19+00:00 to 2026-07-16T22:29:46+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 393.3999999999999772626324556767940521240234375,
    "points_in_zone": 21,
    "first_point": {
        "ts": "2026-07-16T15:56:19+00:00",
        "lat": 51.51626999999999867441147216595709323883056640625,
        "lon": 1.7869099999999999983657517077517695724964141845703125
    },
    "last_point": {
        "ts": "2026-07-16T22:29:46+00:00",
        "lat": 51.5011233000000032689058571122586727142333984375,
        "lon": 1.7922867000000000103909769677557051181793212890625
    }
}
Methodology: 2026.01.18
Sts🛰️✗ English Channel Surveillance Zone
Jul 16, 2026 14:10 UTC 75/100 ▼
Vessel A: IMO 9953432 (ATROTOS) Marshall Is
Vessel B: IMO 9283459 (NORTHERN OSPREY) Panama
  • Minimum Distance: 35 meters
  • Average Distance: 40 meters
  • Duration: 32 minutes
  • Period: 2026-07-16T14:10:05+00:00 to 2026-07-16T14:42:56+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: English Channel Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (ATROTOS and NORTHERN OSPREY) maintained close proximity (min 35m, avg 40m) for 33 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 English Channel Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 35m, avg 40m
Duration5/25Duration 33 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: English Channel Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-16T15:00:02.138492+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010234,
        "imo": 9953432,
        "name": "ATROTOS",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 352005487,
        "imo": 9283459,
        "name": "NORTHERN OSPREY",
        "flag": "Panama"
    },
    "min_distance_m": 34.89999999999999857891452847979962825775146484375,
    "avg_distance_m": 39.60000000000000142108547152020037174224853515625,
    "distance_consistency_m": 5.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 32.89999999999999857891452847979962825775146484375,
    "overlap_duration_s": 1971,
    "speed_a_avg": 0.1700000000000000122124532708767219446599483489990234375,
    "speed_a_std": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_b_avg": 0.1700000000000000122124532708767219446599483489990234375,
    "speed_b_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1700000000000000122124532708767219446599483489990234375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0.1700000000000000122124532708767219446599483489990234375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-16T14:10:05+00:00",
        "end": "2026-07-16T14:42:56+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 35m, avg 40m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 33 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: English Channel Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ATROTOS and NORTHERN OSPREY) maintained close proximity (min 35m, avg 40m) for 33 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 English Channel Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 51.46980169999999787933120387606322765350341796875,
            "lon": 1.765458600000000100038732853136025369167327880859375
        },
        "time_window": {
            "start_ts": "2026-07-16T14:10:05+00:00",
            "end_ts": "2026-07-16T14:42:56+00:00"
        },
        "searched_at": "2026-07-16T15:00:02.138492+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 14:02 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 3h 14m
  • Data Points: 45 AIS positions
  • Period: 2026-07-16T14:02:10+00:00 to 2026-07-16T17:17:06+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 194.900000000000005684341886080801486968994140625,
    "points_in_zone": 45,
    "first_point": {
        "ts": "2026-07-16T14:02:10+00:00",
        "lat": 51.46909000000000133923094836063683032989501953125,
        "lon": 1.76372499999999998721023075631819665431976318359375
    },
    "last_point": {
        "ts": "2026-07-16T17:17:06+00:00",
        "lat": 51.51581329999999780966390972025692462921142578125,
        "lon": 1.7868283000000000360074636773788370192050933837890625
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 13:50 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 3h 26m
  • Data Points: 48 AIS positions
  • Period: 2026-07-16T13:50:09+00:00 to 2026-07-16T17:17:06+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 206.900000000000005684341886080801486968994140625,
    "points_in_zone": 48,
    "first_point": {
        "ts": "2026-07-16T13:50:09+00:00",
        "lat": 51.4684316999999964536982588469982147216796875,
        "lon": 1.763149999999999995026200849679298698902130126953125
    },
    "last_point": {
        "ts": "2026-07-16T17:17:06+00:00",
        "lat": 51.51581329999999780966390972025692462921142578125,
        "lon": 1.7868283000000000360074636773788370192050933837890625
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 12:15 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 5h 1m
  • Data Points: 51 AIS positions
  • Period: 2026-07-16T12:15:22+00:00 to 2026-07-16T17:17:06+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 301.69999999999998863131622783839702606201171875,
    "points_in_zone": 51,
    "first_point": {
        "ts": "2026-07-16T12:15:22+00:00",
        "lat": 51.46680330000000225254552788101136684417724609375,
        "lon": 1.7636016999999999388393234767136164009571075439453125
    },
    "last_point": {
        "ts": "2026-07-16T17:17:06+00:00",
        "lat": 51.51581329999999780966390972025692462921142578125,
        "lon": 1.7868283000000000360074636773788370192050933837890625
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 16, 2026 12:15 UTC 75.0% ▼
  • Duration: 2h 36m
  • Radius: 930 meters
  • Data Points: 20 AIS positions
  • Centroid: 51.4698, 1.7646
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 930.1000000000000227373675443232059478759765625,
    "duration_minutes": 156.599999999999994315658113919198513031005859375,
    "points": 20,
    "centroid": {
        "lat": 51.4697950900000051888127927668392658233642578125,
        "lon": 1.7645603399999998384117816385696642100811004638671875
    },
    "bbox": {
        "min_lat": 51.46680330000000225254552788101136684417724609375,
        "min_lon": 1.762203299999999916991555437562055885791778564453125,
        "max_lat": 51.47788669999999910942278802394866943359375,
        "max_lon": 1.7679249999999999687361196265555918216705322265625
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 11:21 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 5h 55m
  • Data Points: 52 AIS positions
  • Period: 2026-07-16T11:21:16+00:00 to 2026-07-16T17:17:06+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 355.80000000000001136868377216160297393798828125,
    "points_in_zone": 52,
    "first_point": {
        "ts": "2026-07-16T11:21:16+00:00",
        "lat": 51.4666117000000014058969100005924701690673828125,
        "lon": 1.7639682999999999335472011807723902165889739990234375
    },
    "last_point": {
        "ts": "2026-07-16T17:17:06+00:00",
        "lat": 51.51581329999999780966390972025692462921142578125,
        "lon": 1.7868283000000000360074636773788370192050933837890625
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 16, 2026 11:21 UTC 75.0% ▼
  • Duration: 3h 30m
  • Radius: 947 meters
  • Data Points: 21 AIS positions
  • Centroid: 51.4696, 1.7645
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 946.8999999999999772626324556767940521240234375,
    "duration_minutes": 210.69999999999998863131622783839702606201171875,
    "points": 21,
    "centroid": {
        "lat": 51.469643499999989444404491223394870758056640625,
        "lon": 1.76453214761904764174005322274751961231231689453125
    },
    "bbox": {
        "min_lat": 51.4666117000000014058969100005924701690673828125,
        "min_lon": 1.762203299999999916991555437562055885791778564453125,
        "max_lat": 51.47788669999999910942278802394866943359375,
        "max_lon": 1.7679249999999999687361196265555918216705322265625
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Sts🛰️✗ English Channel Surveillance Zone
Jul 16, 2026 10:00 UTC 75/100 ▼
Vessel A: IMO 9283459 (NORTHERN OSPREY) Panama
Vessel B: IMO 9953432 (ATROTOS) Marshall Is
  • Minimum Distance: 29 meters
  • Average Distance: 39 meters
  • Duration: 39 minutes
  • Period: 2026-07-16T10:00:21+00:00 to 2026-07-16T10:39:24+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: English Channel Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (NORTHERN OSPREY and ATROTOS) maintained close proximity (min 29m, avg 39m) for 39 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 English Channel Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 29m, avg 39m
Duration5/25Duration 39 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: English Channel Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-16T14:00:02.028293+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352005487,
        "imo": 9283459,
        "name": "NORTHERN OSPREY",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 538010234,
        "imo": 9953432,
        "name": "ATROTOS",
        "flag": "Marshall Is"
    },
    "min_distance_m": 28.800000000000000710542735760100185871124267578125,
    "avg_distance_m": 38.60000000000000142108547152020037174224853515625,
    "distance_consistency_m": 8.699999999999999289457264239899814128875732421875,
    "duration_minutes": 39,
    "overlap_duration_s": 2343,
    "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": "2026-07-16T10:00:21+00:00",
        "end": "2026-07-16T10:39:24+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 29m, avg 39m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 39 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: English Channel Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (NORTHERN OSPREY and ATROTOS) maintained close proximity (min 29m, avg 39m) for 39 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 English Channel Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 51.4665863999999970701537677086889743804931640625,
            "lon": 1.76372470000000003409468263271264731884002685546875
        },
        "time_window": {
            "start_ts": "2026-07-16T10:00:21+00:00",
            "end_ts": "2026-07-16T10:39:24+00:00"
        },
        "searched_at": "2026-07-16T14:00:02.028293+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 10:00 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 25m
  • Data Points: 50 AIS positions
  • Period: 2026-07-16T10:39:24+00:00 to 2026-07-16T17:05:07+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 385.69999999999998863131622783839702606201171875,
    "points_in_zone": 50,
    "first_point": {
        "ts": "2026-07-16T10:39:24+00:00",
        "lat": 51.46656829999999871461113798432052135467529296875,
        "lon": 1.763994999999999979678477757261134684085845947265625
    },
    "last_point": {
        "ts": "2026-07-16T17:05:07+00:00",
        "lat": 51.51590329999999795518306200392544269561767578125,
        "lon": 1.786729999999999929372052065446041524410247802734375
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 16, 2026 10:00 UTC 75.0% ▼
  • Duration: 4h 51m
  • Radius: 989 meters
  • Data Points: 24 AIS positions
  • Centroid: 51.4693, 1.7645
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 989.3999999999999772626324556767940521240234375,
    "duration_minutes": 291.6000000000000227373675443232059478759765625,
    "points": 24,
    "centroid": {
        "lat": 51.46925979583333088385188602842390537261962890625,
        "lon": 1.76446576666666654631399069330655038356781005859375
    },
    "bbox": {
        "min_lat": 51.46656329999999712754288339056074619293212890625,
        "min_lon": 1.762203299999999916991555437562055885791778564453125,
        "max_lat": 51.47788669999999910942278802394866943359375,
        "max_lon": 1.7679249999999999687361196265555918216705322265625
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Sts English Channel Surveillance Zone
Jul 16, 2026 07:10 UTC 95/100 ▼
Vessel A: IMO 9283459 (NORTHERN OSPREY) Panama
Vessel B: IMO 9953432 (ATROTOS) Marshall Is
  • Minimum Distance: 12 meters
  • Average Distance: 32 meters
  • Duration: 3h 28m
  • Period: 2026-07-16T07:10:50+00:00 to 2026-07-16T10:39:24+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: English Channel Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NORTHERN OSPREY and ATROTOS) maintained close proximity (min 12m, avg 32m) for 209 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in English Channel Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 12m, avg 32m
Duration25/25Duration 209 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±13m
Isolation5/10Isolation data not available
Context5/5In monitored zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352005487,
        "imo": 9283459,
        "name": "NORTHERN OSPREY",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 538010234,
        "imo": 9953432,
        "name": "ATROTOS",
        "flag": "Marshall Is"
    },
    "min_distance_m": 12.300000000000000710542735760100185871124267578125,
    "avg_distance_m": 32,
    "distance_consistency_m": 12.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 208.599999999999994315658113919198513031005859375,
    "overlap_duration_s": 12514,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_std": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-16T07:10:50+00:00",
        "end": "2026-07-16T10:39:24+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 12m, avg 32m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 209 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very 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: English Channel Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NORTHERN OSPREY and ATROTOS) maintained close proximity (min 12m, avg 32m) for 209 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in English Channel Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 07:10 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 5h 37m
  • Data Points: 9 AIS positions
  • Period: 2026-07-16T07:10:50+00:00 to 2026-07-16T12:48:19+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 337.5,
    "points_in_zone": 9,
    "first_point": {
        "ts": "2026-07-16T07:10:50+00:00",
        "lat": 51.4668182999999999083229340612888336181640625,
        "lon": 1.7637167000000000260939714280539192259311676025390625
    },
    "last_point": {
        "ts": "2026-07-16T12:48:19+00:00",
        "lat": 51.4669166999999987410774338059127330780029296875,
        "lon": 1.7632350000000001077893330148071981966495513916015625
    }
}
Methodology: 2026.01.18
Sts🛰️✗ English Channel Surveillance Zone
Jul 16, 2026 06:25 UTC 57/100 ▼
Vessel A: IMO 9953432 (ATROTOS) Marshall Is
Vessel B: IMO 9283459 (NORTHERN OSPREY) Panama
  • Minimum Distance: 22 meters
  • Average Distance: 121 meters
  • Duration: 44 minutes
  • Period: 2026-07-16T06:25:11+00:00 to 2026-07-16T07:09:57+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.9 knots
  • Zone: English Channel Surveillance Zone

Confidence Analysis

Score: 57/100

Low-confidence STS candidate - may warrant review. Two tankers (ATROTOS and NORTHERN OSPREY) maintained close proximity (min 22m, avg 121m) for 45 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.8 knots). Event occurred in English Channel Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 22m, avg 121m
Duration5/25Duration 45 minutes
Speed Stability12/20both very slow; somewhat variable speeds
Distance Consistency5/15Distance variance ±119m
Isolation5/10Isolation data not available
Context5/5In monitored zone: English Channel Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-16T07:45:01.482655+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538010234,
        "imo": 9953432,
        "name": "ATROTOS",
        "flag": "Marshall Is"
    },
    "vessel_b": {
        "mmsi": 352005487,
        "imo": 9283459,
        "name": "NORTHERN OSPREY",
        "flag": "Panama"
    },
    "min_distance_m": 22.300000000000000710542735760100185871124267578125,
    "avg_distance_m": 120.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 118.900000000000005684341886080801486968994140625,
    "duration_minutes": 44.7999999999999971578290569595992565155029296875,
    "overlap_duration_s": 2686,
    "speed_a_avg": 0.2200000000000000011102230246251565404236316680908203125,
    "speed_a_std": 0.13000000000000000444089209850062616169452667236328125,
    "speed_b_avg": 0.84999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.7800000000000000266453525910037569701671600341796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.2200000000000000011102230246251565404236316680908203125,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0.84999999999999997779553950749686919152736663818359375,
            "max_sog": 1.8000000000000000444089209850062616169452667236328125
        }
    },
    "time_window": {
        "start": "2026-07-16T06:25:11+00:00",
        "end": "2026-07-16T07:09:57+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "score": {
        "value": 57,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 22m, avg 121m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 45 minutes"
            },
            "speed_stability": {
                "score": 12,
                "max": 20,
                "detail": "both very slow; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 5,
                "max": 15,
                "detail": "Distance variance \u00b1119m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: English Channel Surveillance Zone"
            }
        },
        "summary": "Low-confidence STS candidate - may warrant review. Two tankers (ATROTOS and NORTHERN OSPREY) maintained close proximity (min 22m, avg 121m) for 45 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.8 knots). Event occurred in English Channel Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 51.46635870000000068102963268756866455078125,
            "lon": 1.763783600000000006957634468562901020050048828125
        },
        "time_window": {
            "start_ts": "2026-07-16T06:25:11+00:00",
            "end_ts": "2026-07-16T07:09:57+00:00"
        },
        "searched_at": "2026-07-16T07:45:01.482655+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 16, 2026 06:23 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 595 meters
  • Data Points: 13 AIS positions
  • Centroid: 51.4661, 1.7636
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 595.3999999999999772626324556767940521240234375,
    "duration_minutes": 384.5,
    "points": 13,
    "centroid": {
        "lat": 51.4660773076923163671381189487874507904052734375,
        "lon": 1.763589615384615338911089565954171121120452880859375
    },
    "bbox": {
        "min_lat": 51.4609583000000014862962416373193264007568359375,
        "min_lon": 1.7610916999999999266179884216398932039737701416015625,
        "max_lat": 51.4669200000000017780621419660747051239013671875,
        "max_lon": 1.764828300000000016467538443976081907749176025390625
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 06:11 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 37m
  • Data Points: 15 AIS positions
  • Period: 2026-07-16T06:11:11+00:00 to 2026-07-16T12:48:19+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 397.1000000000000227373675443232059478759765625,
    "points_in_zone": 15,
    "first_point": {
        "ts": "2026-07-16T06:11:11+00:00",
        "lat": 51.48034830000000283689587377011775970458984375,
        "lon": 1.757178300000000081837470133905299007892608642578125
    },
    "last_point": {
        "ts": "2026-07-16T12:48:19+00:00",
        "lat": 51.4669166999999987410774338059127330780029296875,
        "lon": 1.7632350000000001077893330148071981966495513916015625
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 05:11 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 10m
  • Data Points: 13 AIS positions
  • Period: 2026-07-16T05:11:15+00:00 to 2026-07-16T11:21:16+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 370,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-07-16T05:11:15+00:00",
        "lat": 51.495346699999998918428900651633739471435546875,
        "lon": 1.759563299999999941292117000557482242584228515625
    },
    "last_point": {
        "ts": "2026-07-16T11:21:16+00:00",
        "lat": 51.4666117000000014058969100005924701690673828125,
        "lon": 1.7639682999999999335472011807723902165889739990234375
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 04:08 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 31m
  • Data Points: 14 AIS positions
  • Period: 2026-07-16T04:50:13+00:00 to 2026-07-16T11:21:16+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 391.1000000000000227373675443232059478759765625,
    "points_in_zone": 14,
    "first_point": {
        "ts": "2026-07-16T04:50:13+00:00",
        "lat": 51.4952516999999971858414937742054462432861328125,
        "lon": 1.759935000000000027142732506035827100276947021484375
    },
    "last_point": {
        "ts": "2026-07-16T11:21:16+00:00",
        "lat": 51.4666117000000014058969100005924701690673828125,
        "lon": 1.7639682999999999335472011807723902165889739990234375
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 03:35 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 28m
  • Data Points: 15 AIS positions
  • Period: 2026-07-16T03:35:12+00:00 to 2026-07-16T10:03:18+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 388.1000000000000227373675443232059478759765625,
    "points_in_zone": 15,
    "first_point": {
        "ts": "2026-07-16T03:35:12+00:00",
        "lat": 51.4953100000000034697222872637212276458740234375,
        "lon": 1.7601682999999999079676626934087835252285003662109375
    },
    "last_point": {
        "ts": "2026-07-16T10:03:18+00:00",
        "lat": 51.46656329999999712754288339056074619293212890625,
        "lon": 1.7640949999999999686650653529795818030834197998046875
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 02:05 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 5h 8m
  • Data Points: 15 AIS positions
  • Period: 2026-07-16T02:05:13+00:00 to 2026-07-16T07:14:06+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 308.8999999999999772626324556767940521240234375,
    "points_in_zone": 15,
    "first_point": {
        "ts": "2026-07-16T02:05:13+00:00",
        "lat": 51.49539999999999650981408194638788700103759765625,
        "lon": 1.759994999999999976125764078460633754730224609375
    },
    "last_point": {
        "ts": "2026-07-16T07:14:06+00:00",
        "lat": 51.46676670000000086702129920013248920440673828125,
        "lon": 1.7634250000000000202504679691628552973270416259765625
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 01:35 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 5h 38m
  • Data Points: 18 AIS positions
  • Period: 2026-07-16T01:35:11+00:00 to 2026-07-16T07:14:06+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 338.8999999999999772626324556767940521240234375,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-07-16T01:35:11+00:00",
        "lat": 51.49536330000000106110746855847537517547607421875,
        "lon": 1.759819999999999939888084554695524275302886962890625
    },
    "last_point": {
        "ts": "2026-07-16T07:14:06+00:00",
        "lat": 51.46676670000000086702129920013248920440673828125,
        "lon": 1.7634250000000000202504679691628552973270416259765625
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 16, 2026 01:35 UTC 75.0% ▼
  • Duration: 3h 36m
  • Radius: 28 meters
  • Data Points: 10 AIS positions
  • Centroid: 51.4954, 1.7600
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 27.699999999999999289457264239899814128875732421875,
    "duration_minutes": 216.099999999999994315658113919198513031005859375,
    "points": 10,
    "centroid": {
        "lat": 51.4953574999999972305886331014335155487060546875,
        "lon": 1.759962500000000318323145620524883270263671875
    },
    "bbox": {
        "min_lat": 51.4952516999999971858414937742054462432861328125,
        "min_lon": 1.759563299999999941292117000557482242584228515625,
        "max_lat": 51.49550169999999837955328985117375850677490234375,
        "max_lon": 1.7601682999999999079676626934087835252285003662109375
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 16, 2026 00:32 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 19m
  • Data Points: 17 AIS positions
  • Period: 2026-07-16T00:32:10+00:00 to 2026-07-16T06:51:58+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 379.80000000000001136868377216160297393798828125,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-07-16T00:32:10+00:00",
        "lat": 51.49340169999999972105797496624290943145751953125,
        "lon": 1.7552049999999999041477849459624849259853363037109375
    },
    "last_point": {
        "ts": "2026-07-16T06:51:58+00:00",
        "lat": 51.4669200000000017780621419660747051239013671875,
        "lon": 1.763500000000000067501559897209517657756805419921875
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 16, 2026 00:32 UTC 75.0% ▼
  • Duration: 4h 39m
  • Radius: 360 meters
  • Data Points: 11 AIS positions
  • Centroid: 51.4952, 1.7595
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 359.69999999999998863131622783839702606201171875,
    "duration_minutes": 279.1000000000000227373675443232059478759765625,
    "points": 11,
    "centroid": {
        "lat": 51.49517970000000133268258650787174701690673828125,
        "lon": 1.7595300000000000384403620046214200556278228759765625
    },
    "bbox": {
        "min_lat": 51.49340169999999972105797496624290943145751953125,
        "min_lon": 1.7552049999999999041477849459624849259853363037109375,
        "max_lat": 51.49550169999999837955328985117375850677490234375,
        "max_lon": 1.7601682999999999079676626934087835252285003662109375
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 15, 2026 22:20 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 11 AIS positions
  • Period: 2026-07-15T22:20:15+00:00 to 2026-07-16T04:50:13+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 11,
    "first_point": {
        "ts": "2026-07-15T22:20:15+00:00",
        "lat": 51.49246169999999978017513058148324489593505859375,
        "lon": 1.7561400000000000343192141372128389775753021240234375
    },
    "last_point": {
        "ts": "2026-07-16T04:50:13+00:00",
        "lat": 51.4952516999999971858414937742054462432861328125,
        "lon": 1.759935000000000027142732506035827100276947021484375
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 15, 2026 22:20 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 347 meters
  • Data Points: 11 AIS positions
  • Centroid: 51.4949, 1.7592
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 346.8999999999999772626324556767940521240234375,
    "duration_minutes": 390,
    "points": 11,
    "centroid": {
        "lat": 51.49491742727273191349013359285891056060791015625,
        "lon": 1.75921879090909083487304087611846625804901123046875
    },
    "bbox": {
        "min_lat": 51.49246169999999978017513058148324489593505859375,
        "min_lon": 1.7552049999999999041477849459624849259853363037109375,
        "max_lat": 51.49550169999999837955328985117375850677490234375,
        "max_lon": 1.7601682999999999079676626934087835252285003662109375
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 15, 2026 21:17 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 18m
  • Data Points: 9 AIS positions
  • Period: 2026-07-15T21:17:13+00:00 to 2026-07-16T03:35:12+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 378,
    "points_in_zone": 9,
    "first_point": {
        "ts": "2026-07-15T21:17:13+00:00",
        "lat": 51.492400000000003501554601825773715972900390625,
        "lon": 1.75629830000000008993765732157044112682342529296875
    },
    "last_point": {
        "ts": "2026-07-16T03:35:12+00:00",
        "lat": 51.4953100000000034697222872637212276458740234375,
        "lon": 1.7601682999999999079676626934087835252285003662109375
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 15, 2026 20:14 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 15m
  • Data Points: 12 AIS positions
  • Period: 2026-07-15T20:14:10+00:00 to 2026-07-16T02:29:14+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 375.1000000000000227373675443232059478759765625,
    "points_in_zone": 12,
    "first_point": {
        "ts": "2026-07-15T20:14:10+00:00",
        "lat": 51.4922566999999986592229106463491916656494140625,
        "lon": 1.7573266999999999082859858390293084084987640380859375
    },
    "last_point": {
        "ts": "2026-07-16T02:29:14+00:00",
        "lat": 51.49537670000000133541107061319053173065185546875,
        "lon": 1.7601416999999999202231037997989915311336517333984375
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 15, 2026 20:14 UTC 75.0% ▼
  • Duration: 6h 15m
  • Radius: 240 meters
  • Data Points: 12 AIS positions
  • Centroid: 51.4937, 1.7579
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 240,
    "duration_minutes": 375.1000000000000227373675443232059478759765625,
    "points": 12,
    "centroid": {
        "lat": 51.49371778333333082855460816062986850738525390625,
        "lon": 1.75793958333333311117030461900867521762847900390625
    },
    "bbox": {
        "min_lat": 51.4922499999999985220711096189916133880615234375,
        "min_lon": 1.7552049999999999041477849459624849259853363037109375,
        "max_lat": 51.49550169999999837955328985117375850677490234375,
        "max_lon": 1.7601416999999999202231037997989915311336517333984375
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 15, 2026 19:11 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 13 AIS positions
  • Period: 2026-07-15T19:53:12+00:00 to 2026-07-16T02:29:14+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 396,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-07-15T19:53:12+00:00",
        "lat": 51.4922949999999985948306857608258724212646484375,
        "lon": 1.756853299999999951097606754046864807605743408203125
    },
    "last_point": {
        "ts": "2026-07-16T02:29:14+00:00",
        "lat": 51.49537670000000133541107061319053173065185546875,
        "lon": 1.7601416999999999202231037997989915311336517333984375
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 15, 2026 19:11 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 253 meters
  • Data Points: 13 AIS positions
  • Centroid: 51.4936, 1.7579
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 253.30000000000001136868377216160297393798828125,
    "duration_minutes": 396,
    "points": 13,
    "centroid": {
        "lat": 51.493608338461541507058427669107913970947265625,
        "lon": 1.7578560230769231242931027736631222069263458251953125
    },
    "bbox": {
        "min_lat": 51.4922499999999985220711096189916133880615234375,
        "min_lon": 1.7552049999999999041477849459624849259853363037109375,
        "max_lat": 51.49550169999999837955328985117375850677490234375,
        "max_lon": 1.7601416999999999202231037997989915311336517333984375
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 15, 2026 18:21 UTC 75.0% ▼
  • Duration: 6h 11m
  • Radius: 418 meters
  • Data Points: 20 AIS positions
  • Centroid: 51.4927, 1.7567
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 418,
    "duration_minutes": 371,
    "points": 20,
    "centroid": {
        "lat": 51.49266941500000172027284861542284488677978515625,
        "lon": 1.756703659999999889151922616292722523212432861328125
    },
    "bbox": {
        "min_lat": 51.49224000000000245336195803247392177581787109375,
        "min_lon": 1.7543683000000001026563722916762344539165496826171875,
        "max_lat": 51.49613169999999939818735583685338497161865234375,
        "max_lon": 1.7573266999999999082859858390293084084987640380859375
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 15, 2026 18:02 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 29m
  • Data Points: 25 AIS positions
  • Period: 2026-07-15T18:02:44+00:00 to 2026-07-16T00:32:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 389.3999999999999772626324556767940521240234375,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-07-15T18:02:44+00:00",
        "lat": 51.51641000000000047975845518521964550018310546875,
        "lon": 1.7510232999999999492501956410706043243408203125
    },
    "last_point": {
        "ts": "2026-07-16T00:32:10+00:00",
        "lat": 51.49340169999999972105797496624290943145751953125,
        "lon": 1.7552049999999999041477849459624849259853363037109375
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 15, 2026 17:03 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 5h 16m
  • Data Points: 36 AIS positions
  • Period: 2026-07-15T17:03:56+00:00 to 2026-07-15T22:20:15+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 316.30000000000001136868377216160297393798828125,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-07-15T17:03:56+00:00",
        "lat": 51.52083830000000119753167382441461086273193359375,
        "lon": 1.7532449999999999423749841298558749258518218994140625
    },
    "last_point": {
        "ts": "2026-07-15T22:20:15+00:00",
        "lat": 51.49246169999999978017513058148324489593505859375,
        "lon": 1.7561400000000000343192141372128389775753021240234375
    }
}
Methodology: 2026.01.18
Sts English Channel Surveillance Zone
Jul 15, 2026 17:00 UTC 72/100 ▼
Vessel A: IMO 9283459 (NORTHERN OSPREY) Panama
Vessel B: IMO 9826720 (ALEXANDER) Liberia
  • Minimum Distance: 11 meters
  • Average Distance: 56 meters
  • Duration: 39 minutes
  • Period: 2026-07-15T17:23:15+00:00 to 2026-07-15T18:02:44+00:00
  • Vessel A Avg Speed: 0.3 knots
  • Vessel B Avg Speed: 0.3 knots
  • Zone: English Channel Surveillance Zone

Confidence Analysis

Score: 72/100

Moderate-confidence STS candidate. Two tankers (NORTHERN OSPREY and ALEXANDER) maintained close proximity (min 11m, avg 56m) for 40 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in English Channel Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 11m, avg 56m
Duration5/25Duration 40 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency12/15Distance variance ±34m
Isolation5/10Isolation data not available
Context5/5In monitored zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352005487,
        "imo": 9283459,
        "name": "NORTHERN OSPREY",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636018682,
        "imo": 9826720,
        "name": "ALEXANDER",
        "flag": "Liberia"
    },
    "min_distance_m": 11.300000000000000710542735760100185871124267578125,
    "avg_distance_m": 56.2999999999999971578290569595992565155029296875,
    "distance_consistency_m": 34.2000000000000028421709430404007434844970703125,
    "duration_minutes": 39.5,
    "overlap_duration_s": 2369,
    "speed_a_avg": 0.270000000000000017763568394002504646778106689453125,
    "speed_a_std": 0.14000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0.340000000000000024424906541753443889319896697998046875,
    "speed_b_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.270000000000000017763568394002504646778106689453125,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.340000000000000024424906541753443889319896697998046875,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-07-15T17:23:15+00:00",
        "end": "2026-07-15T18:02:44+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "score": {
        "value": 72,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 56m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 40 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 12,
                "max": 15,
                "detail": "Distance variance \u00b134m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: English Channel Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (NORTHERN OSPREY and ALEXANDER) maintained close proximity (min 11m, avg 56m) for 40 minutes. Both vessels were slow-moving (avg speeds 0.3 and 0.3 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in English Channel Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts English Channel Surveillance Zone
Jul 15, 2026 16:43 UTC 85/100 ▼
Vessel A: IMO 9283459 (NORTHERN OSPREY) Panama
Vessel B: IMO 9826720 (ALEXANDER) Liberia
  • Minimum Distance: 11 meters
  • Average Distance: 48 meters
  • Duration: 1h 19m
  • Period: 2026-07-15T16:43:09+00:00 to 2026-07-15T18:02:44+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: English Channel Surveillance Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (NORTHERN OSPREY and ALEXANDER) maintained close proximity (min 11m, avg 48m) for 80 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 English Channel Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 11m, avg 48m
Duration15/25Duration 80 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±28m
Isolation5/10Isolation data not available
Context5/5In monitored zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 352005487,
        "imo": 9283459,
        "name": "NORTHERN OSPREY",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 636018682,
        "imo": 9826720,
        "name": "ALEXANDER",
        "flag": "Liberia"
    },
    "min_distance_m": 11.300000000000000710542735760100185871124267578125,
    "avg_distance_m": 48,
    "distance_consistency_m": 28.10000000000000142108547152020037174224853515625,
    "duration_minutes": 79.599999999999994315658113919198513031005859375,
    "overlap_duration_s": 4775,
    "speed_a_avg": 0.179999999999999993338661852249060757458209991455078125,
    "speed_a_std": 0.14000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0.200000000000000011102230246251565404236316680908203125,
    "speed_b_std": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.179999999999999993338661852249060757458209991455078125,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.200000000000000011102230246251565404236316680908203125,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-07-15T16:43:09+00:00",
        "end": "2026-07-15T18:02:44+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 48m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 80 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b128m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: English Channel Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NORTHERN OSPREY and ALEXANDER) maintained close proximity (min 11m, avg 48m) for 80 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 English Channel Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 15, 2026 16:02 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 17m
  • Data Points: 45 AIS positions
  • Period: 2026-07-15T16:02:40+00:00 to 2026-07-15T22:20:15+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 377.6000000000000227373675443232059478759765625,
    "points_in_zone": 45,
    "first_point": {
        "ts": "2026-07-15T16:02:40+00:00",
        "lat": 51.52159000000000332875060848891735076904296875,
        "lon": 1.7527083000000001078433342627249658107757568359375
    },
    "last_point": {
        "ts": "2026-07-15T22:20:15+00:00",
        "lat": 51.49246169999999978017513058148324489593505859375,
        "lon": 1.7561400000000000343192141372128389775753021240234375
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 15, 2026 16:02 UTC 75.0% ▼
  • Duration: 2h 10m
  • Radius: 1,135 meters
  • Data Points: 25 AIS positions
  • Centroid: 51.5193, 1.7531
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 1134.59999999999990905052982270717620849609375,
    "duration_minutes": 130.19999999999998863131622783839702606201171875,
    "points": 25,
    "centroid": {
        "lat": 51.519284128000009559400496073067188262939453125,
        "lon": 1.7531060559999998016422750879428349435329437255859375
    },
    "bbox": {
        "min_lat": 51.5091632999999973208105075173079967498779296875,
        "min_lon": 1.7510232999999999492501956410706043243408203125,
        "max_lat": 51.52159000000000332875060848891735076904296875,
        "max_lon": 1.7551067000000000195569782590609975159168243408203125
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Sts English Channel Surveillance Zone
Jul 15, 2026 15:24 UTC 95/100 ▼
Vessel A: IMO 9826720 (ALEXANDER) Liberia
Vessel B: IMO 9283459 (NORTHERN OSPREY) Panama
  • Minimum Distance: 11 meters
  • Average Distance: 45 meters
  • Duration: 2h 51m
  • Period: 2026-07-15T15:03:38+00:00 to 2026-07-15T17:54:38+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: English Channel Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (ALEXANDER and NORTHERN OSPREY) maintained close proximity (min 11m, avg 45m) for 171 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in English Channel Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 11m, avg 45m
Duration25/25Duration 171 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±27m
Isolation5/10Isolation data not available
Context5/5In monitored zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636018682,
        "imo": 9826720,
        "name": "ALEXANDER",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 352005487,
        "imo": 9283459,
        "name": "NORTHERN OSPREY",
        "flag": "Panama"
    },
    "min_distance_m": 11.300000000000000710542735760100185871124267578125,
    "avg_distance_m": 45,
    "distance_consistency_m": 27,
    "duration_minutes": 171,
    "overlap_duration_s": 10260,
    "speed_a_avg": 0.11999999999999999555910790149937383830547332763671875,
    "speed_a_std": 0.1700000000000000122124532708767219446599483489990234375,
    "speed_b_avg": 0.11999999999999999555910790149937383830547332763671875,
    "speed_b_std": 0.1600000000000000033306690738754696212708950042724609375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11999999999999999555910790149937383830547332763671875,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.11999999999999999555910790149937383830547332763671875,
            "max_sog": 0.5
        }
    },
    "time_window": {
        "start": "2026-07-15T15:03:38+00:00",
        "end": "2026-07-15T17:54:38+00:00"
    },
    "points_count": {
        "vessel_a": 21,
        "vessel_b": 21
    },
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 45m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 171 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b127m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: English Channel Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALEXANDER and NORTHERN OSPREY) maintained close proximity (min 11m, avg 45m) for 171 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in English Channel Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 15, 2026 15:03 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 29m
  • Data Points: 47 AIS positions
  • Period: 2026-07-15T15:51:05+00:00 to 2026-07-15T22:20:15+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 389.19999999999998863131622783839702606201171875,
    "points_in_zone": 47,
    "first_point": {
        "ts": "2026-07-15T15:51:05+00:00",
        "lat": 51.521718300000003409877535887062549591064453125,
        "lon": 1.752748299999999925802285360987298190593719482421875
    },
    "last_point": {
        "ts": "2026-07-15T22:20:15+00:00",
        "lat": 51.49246169999999978017513058148324489593505859375,
        "lon": 1.7561400000000000343192141372128389775753021240234375
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 15, 2026 15:03 UTC 75.0% ▼
  • Duration: 2h 21m
  • Radius: 1,155 meters
  • Data Points: 27 AIS positions
  • Centroid: 51.5195, 1.7531
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 1154.5,
    "duration_minutes": 141.69999999999998863131622783839702606201171875,
    "points": 27,
    "centroid": {
        "lat": 51.5194628962963037110966979525983333587646484375,
        "lon": 1.7530792481481480837857134247315116226673126220703125
    },
    "bbox": {
        "min_lat": 51.5091632999999973208105075173079967498779296875,
        "min_lon": 1.7510232999999999492501956410706043243408203125,
        "max_lat": 51.521718300000003409877535887062549591064453125,
        "max_lon": 1.7551067000000000195569782590609975159168243408203125
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Sts🛰️? English Channel Surveillance Zone
Jul 15, 2026 14:06 UTC 95/100 ▼
Vessel A: IMO 9826720 (ALEXANDER) Liberia
Vessel B: IMO 9283459 (NORTHERN OSPREY) Panama
  • Minimum Distance: 11 meters
  • Average Distance: 43 meters
  • Duration: 3h 48m
  • Period: 2026-07-15T14:06:38+00:00 to 2026-07-15T17:54:38+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: English Channel Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (ALEXANDER and NORTHERN OSPREY) maintained close proximity (min 11m, avg 43m) for 228 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in English Channel Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 11m, avg 43m
Duration25/25Duration 228 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±24m
Isolation5/10Isolation data not available
Context5/5In monitored zone: English Channel Surveillance Zone

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1C_IW_GRDH_1SDV_20260715T174027_20260715T174052_008557_010F0B_91FF_COG • Acquired: 2026-07-15T17:40:27.002148Z • Platform: sentinel-1c
SAR satellite preview for event 942018

Click image to view full size

Searched: 2026-07-15T20:30:17.420713+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636018682,
        "imo": 9826720,
        "name": "ALEXANDER",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 352005487,
        "imo": 9283459,
        "name": "NORTHERN OSPREY",
        "flag": "Panama"
    },
    "min_distance_m": 11.300000000000000710542735760100185871124267578125,
    "avg_distance_m": 43.2999999999999971578290569595992565155029296875,
    "distance_consistency_m": 23.5,
    "duration_minutes": 228,
    "overlap_duration_s": 13680,
    "speed_a_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_a_std": 0.1700000000000000122124532708767219446599483489990234375,
    "speed_b_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_b_std": 0.1700000000000000122124532708767219446599483489990234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.5
        }
    },
    "time_window": {
        "start": "2026-07-15T14:06:38+00:00",
        "end": "2026-07-15T17:54:38+00:00"
    },
    "points_count": {
        "vessel_a": 29,
        "vessel_b": 29
    },
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 43m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 228 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b124m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: English Channel Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALEXANDER and NORTHERN OSPREY) maintained close proximity (min 11m, avg 43m) for 228 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in English Channel Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 51.5203580000000016525518731214106082916259765625,
            "lon": 1.753244299999999977757170199765823781490325927734375
        },
        "time_window": {
            "start_ts": "2026-07-15T14:06:38+00:00",
            "end_ts": "2026-07-15T17:54:38+00:00"
        },
        "searched_at": "2026-07-15T20:30:17.420713+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260715T174027_20260715T174052_008557_010F0B_91FF_COG",
        "scene_datetime": "2026-07-15T17:40:27.002148Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": -0.30670900000000000940048039410612545907497406005859375,
            "min_lat": 50.39098700000000263798938249237835407257080078125,
            "max_lon": 3.8464369999999998839257386862300336360931396484375,
            "max_lat": 52.2957310000000035188350011594593524932861328125
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/07\/event_942018_thumbnail_20260715203021.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/07\/event_942018_thumbnail_20260715203021.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 15, 2026 14:04 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 59 AIS positions
  • Period: 2026-07-15T14:43:45+00:00 to 2026-07-15T21:17:13+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 393.5,
    "points_in_zone": 59,
    "first_point": {
        "ts": "2026-07-15T14:43:45+00:00",
        "lat": 51.520904999999999063220457173883914947509765625,
        "lon": 1.7542500000000000870414851306122727692127227783203125
    },
    "last_point": {
        "ts": "2026-07-15T21:17:13+00:00",
        "lat": 51.492400000000003501554601825773715972900390625,
        "lon": 1.75629830000000008993765732157044112682342529296875
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 15, 2026 14:04 UTC 75.0% ▼
  • Duration: 4h 5m
  • Radius: 876 meters
  • Data Points: 48 AIS positions
  • Centroid: 51.5202, 1.7534
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 875.8999999999999772626324556767940521240234375,
    "duration_minutes": 245.80000000000001136868377216160297393798828125,
    "points": 48,
    "centroid": {
        "lat": 51.52022048541666521259685396216809749603271484375,
        "lon": 1.7533506187500000894630147740826942026615142822265625
    },
    "bbox": {
        "min_lat": 51.51241830000000021527739590965211391448974609375,
        "min_lon": 1.7510232999999999492501956410706043243408203125,
        "max_lat": 51.52185829999999810979716130532324314117431640625,
        "max_lon": 1.75543329999999997426129993982613086700439453125
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Sts English Channel Surveillance Zone
Jul 15, 2026 13:02 UTC 95/100 ▼
Vessel A: IMO 9826720 (ALEXANDER) Liberia
Vessel B: IMO 9283459 (NORTHERN OSPREY) Panama
  • Minimum Distance: 11 meters
  • Average Distance: 43 meters
  • Duration: 4h 9m
  • Period: 2026-07-15T13:45:37+00:00 to 2026-07-15T17:54:38+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: English Channel Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (ALEXANDER and NORTHERN OSPREY) maintained close proximity (min 11m, avg 43m) for 249 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in English Channel Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 11m, avg 43m
Duration25/25Duration 249 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±23m
Isolation5/10Isolation data not available
Context5/5In monitored zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636018682,
        "imo": 9826720,
        "name": "ALEXANDER",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 352005487,
        "imo": 9283459,
        "name": "NORTHERN OSPREY",
        "flag": "Panama"
    },
    "min_distance_m": 11.300000000000000710542735760100185871124267578125,
    "avg_distance_m": 42.60000000000000142108547152020037174224853515625,
    "distance_consistency_m": 22.89999999999999857891452847979962825775146484375,
    "duration_minutes": 249,
    "overlap_duration_s": 14941,
    "speed_a_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_a_std": 0.1600000000000000033306690738754696212708950042724609375,
    "speed_b_avg": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_b_std": 0.1600000000000000033306690738754696212708950042724609375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.1499999999999999944488848768742172978818416595458984375,
            "max_sog": 0.5
        }
    },
    "time_window": {
        "start": "2026-07-15T13:45:37+00:00",
        "end": "2026-07-15T17:54:38+00:00"
    },
    "points_count": {
        "vessel_a": 31,
        "vessel_b": 31
    },
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 11m, avg 43m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 249 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b123m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: English Channel Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALEXANDER and NORTHERN OSPREY) maintained close proximity (min 11m, avg 43m) for 249 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in English Channel Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 15, 2026 13:02 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 32m
  • Data Points: 68 AIS positions
  • Period: 2026-07-15T13:41:16+00:00 to 2026-07-15T20:14:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 392.8999999999999772626324556767940521240234375,
    "points_in_zone": 68,
    "first_point": {
        "ts": "2026-07-15T13:41:16+00:00",
        "lat": 51.5191267000000010511939763091504573822021484375,
        "lon": 1.7530333000000000165385927175520919263362884521484375
    },
    "last_point": {
        "ts": "2026-07-15T20:14:10+00:00",
        "lat": 51.4922566999999986592229106463491916656494140625,
        "lon": 1.7573266999999999082859858390293084084987640380859375
    }
}
Methodology: 2026.01.18
Loiter English Channel Surveillance Zone
Jul 15, 2026 13:02 UTC 75.0% ▼
  • Duration: 5h 10m
  • Radius: 1,176 meters
  • Data Points: 61 AIS positions
  • Centroid: 51.5197, 1.7531
  • Zone: English Channel Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 1176.299999999999954525264911353588104248046875,
    "duration_minutes": 310.1000000000000227373675443232059478759765625,
    "points": 61,
    "centroid": {
        "lat": 51.5196645606557268592951004393398761749267578125,
        "lon": 1.7531409770491805932834949999232776463031768798828125
    },
    "bbox": {
        "min_lat": 51.5091632999999973208105075173079967498779296875,
        "min_lon": 1.750105000000000021742607714259065687656402587890625,
        "max_lat": 51.52185829999999810979716130532324314117431640625,
        "max_lon": 1.75543329999999997426129993982613086700439453125
    },
    "zone_id": "discovered_004"
}
Methodology: 2026.01.18
Zone Dwell English Channel Surveillance Zone
Jul 15, 2026 12:00 UTC 80.0% ▼
  • Zone: English Channel Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 73 AIS positions
  • Period: 2026-07-15T12:52:59+00:00 to 2026-07-15T19:29:12+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_004",
    "zone_name": "English Channel Surveillance Zone",
    "dwell_minutes": 396.19999999999998863131622783839702606201171875,
    "points_in_zone": 73,
    "first_point": {
        "ts": "2026-07-15T12:52:59+00:00",
        "lat": 51.5162150000000025329427444376051425933837890625,
        "lon": 1.7501933000000000628659790891106240451335906982421875
    },
    "last_point": {
        "ts": "2026-07-15T19:29:12+00:00",
        "lat": 51.49224000000000245336195803247392177581787109375,
        "lon": 1.75723830000000003082050170633010566234588623046875
    }
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Jul 27 01:40 51.9059 3.3016 7.8 kn 78.6° English Channel Surveillance Zone
Jul 27 01:39 51.9053 3.2970 7.8 kn 78.0° English Channel Surveillance Zone
Jul 27 01:36 51.9040 3.2866 7.8 kn 78.2° English Channel Surveillance Zone
Jul 27 01:30 51.9015 3.2668 7.9 kn 79.4° English Channel Surveillance Zone
Jul 27 01:20 51.8970 3.2305 7.9 kn 77.3° English Channel Surveillance Zone
Jul 27 00:37 51.8652 3.0569 10.1 kn 74.1° English Channel Surveillance Zone
Jul 27 00:32 51.8615 3.0366 10.1 kn 74.9° English Channel Surveillance Zone
Jul 27 00:28 51.8586 3.0206 10.1 kn 73.1° English Channel Surveillance Zone
Jul 27 00:27 51.8578 3.0163 10.1 kn 72.9° English Channel Surveillance Zone
Jul 27 00:26 51.8570 3.0120 10.1 kn 74.9° English Channel Surveillance Zone
Jul 27 00:25 51.8560 3.0062 10.2 kn 72.8° English Channel Surveillance Zone
Jul 27 00:22 51.8531 2.9918 10.1 kn 71.7° English Channel Surveillance Zone
Jul 27 00:14 51.8459 2.9571 10.2 kn 72.4° English Channel Surveillance Zone
Jul 27 00:13 51.8451 2.9528 10.2 kn 73.0° English Channel Surveillance Zone
Jul 27 00:08 51.8405 2.9310 10.4 kn 70.1° English Channel Surveillance Zone
Jul 27 00:04 51.8372 2.9150 10.2 kn 71.3° English Channel Surveillance Zone
Jul 26 23:58 51.8314 2.8907 10.3 kn 67.5° English Channel Surveillance Zone
Jul 26 23:33 51.8056 2.7808 10.2 kn 69.9° English Channel Surveillance Zone
Jul 26 23:29 51.8015 2.7636 10.2 kn 69.3° English Channel Surveillance Zone
Jul 26 23:28 51.8004 2.7594 10.2 kn 68.3° English Channel Surveillance Zone

Showing 20 of 100 recent positions.

Data Source

Vessel observed through FleetLeaks' AIS monitoring system in zones of interest. Identity and position data derived from AIS broadcasts and public maritime databases.

Disclaimer: AIS data can be spoofed or falsified. Vessel identities should be independently verified before making compliance decisions.