HORIZON ARMONIA

IMO 9407354

Vessel information

Vessel Name HORIZON ARMONIA
IMO Number 9407354
MMSI 636013938
Vessel Type Tanker
Flag 🇱🇷 LIBERIA
Call Sign A8QI9
Length 183 m
Beam 32 m

Detected Events (100)

Zone Dwell Central Atlantic Monitoring Zone
Sep 9, 2026 04:25 UTC 80.0% ▼
  • Zone: Central Atlantic Monitoring Zone
  • Duration: 1h 40m
  • Data Points: 24 AIS positions
  • Period: 2026-09-09T04:25:49+00:00 to 2026-09-09T06:06:05+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_155",
    "zone_name": "Central Atlantic Monitoring Zone",
    "dwell_minutes": 100.2999999999999971578290569595992565155029296875,
    "points_in_zone": 24,
    "first_point": {
        "ts": "2026-09-09T04:25:49+00:00",
        "lat": 37.892733300000003282548277638852596282958984375,
        "lon": 7.4949332999999995763573679141700267791748046875
    },
    "last_point": {
        "ts": "2026-09-09T06:06:05+00:00",
        "lat": 37.8711332999999967796611599624156951904296875,
        "lon": 6.98036670000000025737563191796652972698211669921875
    }
}
Methodology: 2026.01.18
Zone Dwell Central Mediterranean Monitoring Zone
Sep 9, 2026 02:49 UTC 80.0% ▼
  • Zone: Central Mediterranean Monitoring Zone
  • Duration: 2h 16m
  • Data Points: 15 AIS positions
  • Period: 2026-09-09T02:49:52+00:00 to 2026-09-09T05:06:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_011",
    "zone_name": "Central Mediterranean Monitoring Zone",
    "dwell_minutes": 136.5,
    "points_in_zone": 15,
    "first_point": {
        "ts": "2026-09-09T02:49:52+00:00",
        "lat": 37.9209833000000031688614399172365665435791015625,
        "lon": 7.96301669999999983673433234798721969127655029296875
    },
    "last_point": {
        "ts": "2026-09-09T05:06:24+00:00",
        "lat": 37.88586670000000111713234218768775463104248046875,
        "lon": 7.2883332999999996815176928066648542881011962890625
    }
}
Methodology: 2026.01.18
Zone Dwell Central Mediterranean Monitoring Zone
Sep 9, 2026 01:12 UTC 80.0% ▼
  • Zone: Central Mediterranean Monitoring Zone
  • Duration: 3h 53m
  • Data Points: 16 AIS positions
  • Period: 2026-09-09T01:12:34+00:00 to 2026-09-09T05:06:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_011",
    "zone_name": "Central Mediterranean Monitoring Zone",
    "dwell_minutes": 233.80000000000001136868377216160297393798828125,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-09-09T01:12:34+00:00",
        "lat": 37.9455166999999988775016390718519687652587890625,
        "lon": 8.437966700000000486170392832718789577484130859375
    },
    "last_point": {
        "ts": "2026-09-09T05:06:24+00:00",
        "lat": 37.88586670000000111713234218768775463104248046875,
        "lon": 7.2883332999999996815176928066648542881011962890625
    }
}
Methodology: 2026.01.18
Zone Dwell Central Mediterranean Monitoring Zone
Sep 9, 2026 00:52 UTC 80.0% ▼
  • Zone: Central Mediterranean Monitoring Zone
  • Duration: 4h 14m
  • Data Points: 18 AIS positions
  • Period: 2026-09-09T00:52:10+00:00 to 2026-09-09T05:06:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_011",
    "zone_name": "Central Mediterranean Monitoring Zone",
    "dwell_minutes": 254.19999999999998863131622783839702606201171875,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-09-09T00:52:10+00:00",
        "lat": 37.94553330000000102018020697869360446929931640625,
        "lon": 8.54118330000000014479155652225017547607421875
    },
    "last_point": {
        "ts": "2026-09-09T05:06:24+00:00",
        "lat": 37.88586670000000111713234218768775463104248046875,
        "lon": 7.2883332999999996815176928066648542881011962890625
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Sep 8, 2026 21:15 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 1h 44m
  • Data Points: 19 AIS positions
  • Period: 2026-09-08T21:15:40+00:00 to 2026-09-08T23:00:22+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_138",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 104.7000000000000028421709430404007434844970703125,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-09-08T21:15:40+00:00",
        "lat": 37.77398329999999759820639155805110931396484375,
        "lon": 9.5949000000000008725464795134030282497406005859375
    },
    "last_point": {
        "ts": "2026-09-08T23:00:22+00:00",
        "lat": 37.9243000000000023419488570652902126312255859375,
        "lon": 9.1026000000000006906475391588173806667327880859375
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Sep 8, 2026 20:44 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 2h 16m
  • Data Points: 31 AIS positions
  • Period: 2026-09-08T20:44:07+00:00 to 2026-09-08T23:00:22+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_138",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 136.19999999999998863131622783839702606201171875,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-09-08T20:44:07+00:00",
        "lat": 37.72991669999999686524461139924824237823486328125,
        "lon": 9.738466700000000031423041946254670619964599609375
    },
    "last_point": {
        "ts": "2026-09-08T23:00:22+00:00",
        "lat": 37.9243000000000023419488570652902126312255859375,
        "lon": 9.1026000000000006906475391588173806667327880859375
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Sep 8, 2026 19:54 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 3h 6m
  • Data Points: 32 AIS positions
  • Period: 2026-09-08T19:54:04+00:00 to 2026-09-08T23:00:22+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_138",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 186.30000000000001136868377216160297393798828125,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-09-08T19:54:04+00:00",
        "lat": 37.6660667000000017878846847452223300933837890625,
        "lon": 9.97064999999999912461134954355657100677490234375
    },
    "last_point": {
        "ts": "2026-09-08T23:00:22+00:00",
        "lat": 37.9243000000000023419488570652902126312255859375,
        "lon": 9.1026000000000006906475391588173806667327880859375
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Surveillance Zone
Sep 8, 2026 18:00 UTC 80.0% ▼
  • Zone: Central Atlantic Surveillance Zone
  • Duration: 1h 2m
  • Data Points: 8 AIS positions
  • Period: 2026-09-08T18:00:55+00:00 to 2026-09-08T19:03:14+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_014",
    "zone_name": "Central Atlantic Surveillance Zone",
    "dwell_minutes": 62.2999999999999971578290569595992565155029296875,
    "points_in_zone": 8,
    "first_point": {
        "ts": "2026-09-08T18:00:55+00:00",
        "lat": 37.62866669999999658102751709520816802978515625,
        "lon": 10.5142833000000006649088390986435115337371826171875
    },
    "last_point": {
        "ts": "2026-09-08T19:03:14+00:00",
        "lat": 37.642983299999997370832716114819049835205078125,
        "lon": 10.21348330000000004247340257279574871063232421875
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Surveillance Zone
Sep 8, 2026 17:00 UTC 80.0% ▼
  • Zone: Central Atlantic Surveillance Zone
  • Duration: 2h 2m
  • Data Points: 37 AIS positions
  • Period: 2026-09-08T17:00:26+00:00 to 2026-09-08T19:03:14+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_014",
    "zone_name": "Central Atlantic Surveillance Zone",
    "dwell_minutes": 122.7999999999999971578290569595992565155029296875,
    "points_in_zone": 37,
    "first_point": {
        "ts": "2026-09-08T17:00:26+00:00",
        "lat": 37.56873329999999810979716130532324314117431640625,
        "lon": 10.7944332999999996758333509205840528011322021484375
    },
    "last_point": {
        "ts": "2026-09-08T19:03:14+00:00",
        "lat": 37.642983299999997370832716114819049835205078125,
        "lon": 10.21348330000000004247340257279574871063232421875
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Surveillance Zone
Sep 8, 2026 16:00 UTC 80.0% ▼
  • Zone: Central Atlantic Surveillance Zone
  • Duration: 3h 3m
  • Data Points: 40 AIS positions
  • Period: 2026-09-08T16:00:06+00:00 to 2026-09-08T19:03:14+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_014",
    "zone_name": "Central Atlantic Surveillance Zone",
    "dwell_minutes": 183.099999999999994315658113919198513031005859375,
    "points_in_zone": 40,
    "first_point": {
        "ts": "2026-09-08T16:00:06+00:00",
        "lat": 37.489266700000001719672582112252712249755859375,
        "lon": 11.0707000000000004291678123991005122661590576171875
    },
    "last_point": {
        "ts": "2026-09-08T19:03:14+00:00",
        "lat": 37.642983299999997370832716114819049835205078125,
        "lon": 10.21348330000000004247340257279574871063232421875
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Surveillance Zone
Sep 8, 2026 15:19 UTC 80.0% ▼
  • Zone: Central Atlantic Surveillance Zone
  • Duration: 3h 43m
  • Data Points: 45 AIS positions
  • Period: 2026-09-08T15:19:24+00:00 to 2026-09-08T19:03:14+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_014",
    "zone_name": "Central Atlantic Surveillance Zone",
    "dwell_minutes": 223.80000000000001136868377216160297393798828125,
    "points_in_zone": 45,
    "first_point": {
        "ts": "2026-09-08T15:19:24+00:00",
        "lat": 37.4234000000000008867573342286050319671630859375,
        "lon": 11.257600000000000051159076974727213382720947265625
    },
    "last_point": {
        "ts": "2026-09-08T19:03:14+00:00",
        "lat": 37.642983299999997370832716114819049835205078125,
        "lon": 10.21348330000000004247340257279574871063232421875
    }
}
Methodology: 2026.01.18
Zone Dwell Central Atlantic Surveillance Zone
Sep 8, 2026 14:28 UTC 80.0% ▼
  • Zone: Central Atlantic Surveillance Zone
  • Duration: 4h 34m
  • Data Points: 46 AIS positions
  • Period: 2026-09-08T14:28:24+00:00 to 2026-09-08T19:03:14+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_014",
    "zone_name": "Central Atlantic Surveillance Zone",
    "dwell_minutes": 274.80000000000001136868377216160297393798828125,
    "points_in_zone": 46,
    "first_point": {
        "ts": "2026-09-08T14:28:24+00:00",
        "lat": 37.3150667000000026973793865181505680084228515625,
        "lon": 11.476883300000000787122189649380743503570556640625
    },
    "last_point": {
        "ts": "2026-09-08T19:03:14+00:00",
        "lat": 37.642983299999997370832716114819049835205078125,
        "lon": 10.21348330000000004247340257279574871063232421875
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Sep 7, 2026 22:36 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 1h 9m
  • Data Points: 24 AIS positions
  • Period: 2026-09-07T22:36:05+00:00 to 2026-09-07T23:45:05+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Istanbul Black Sea Surveillance Zone",
    "dwell_minutes": 69,
    "points_in_zone": 24,
    "first_point": {
        "ts": "2026-09-07T22:36:05+00:00",
        "lat": 35.9251000000000004774847184307873249053955078125,
        "lon": 15.5138332999999999373130776803009212017059326171875
    },
    "last_point": {
        "ts": "2026-09-07T23:45:05+00:00",
        "lat": 36.04298330000000305517460219562053680419921875,
        "lon": 15.239083300000000775753505877219140529632568359375
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Sep 7, 2026 21:01 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 2h 43m
  • Data Points: 50 AIS positions
  • Period: 2026-09-07T21:01:44+00:00 to 2026-09-07T23:45:05+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Istanbul Black Sea Surveillance Zone",
    "dwell_minutes": 163.30000000000001136868377216160297393798828125,
    "points_in_zone": 50,
    "first_point": {
        "ts": "2026-09-07T21:01:44+00:00",
        "lat": 35.7879166999999966947143548168241977691650390625,
        "lon": 15.9064166999999994089876054204069077968597412109375
    },
    "last_point": {
        "ts": "2026-09-07T23:45:05+00:00",
        "lat": 36.04298330000000305517460219562053680419921875,
        "lon": 15.239083300000000775753505877219140529632568359375
    }
}
Methodology: 2026.01.18
Zone Dwell Istanbul Black Sea Surveillance Zone
Sep 7, 2026 20:58 UTC 80.0% ▼
  • Zone: Istanbul Black Sea Surveillance Zone
  • Duration: 2h 46m
  • Data Points: 51 AIS positions
  • Period: 2026-09-07T20:58:44+00:00 to 2026-09-07T23:45:05+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_029",
    "zone_name": "Istanbul Black Sea Surveillance Zone",
    "dwell_minutes": 166.30000000000001136868377216160297393798828125,
    "points_in_zone": 51,
    "first_point": {
        "ts": "2026-09-07T20:58:44+00:00",
        "lat": 35.78358329999999654091880074702203273773193359375,
        "lon": 15.9187667000000008243887350545264780521392822265625
    },
    "last_point": {
        "ts": "2026-09-07T23:45:05+00:00",
        "lat": 36.04298330000000305517460219562053680419921875,
        "lon": 15.239083300000000775753505877219140529632568359375
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 5, 2026 01:01 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 1h 1m
  • Data Points: 32 AIS positions
  • Period: 2026-09-05T01:01:30+00:00 to 2026-09-05T02:02:44+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 61.2000000000000028421709430404007434844970703125,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-09-05T01:01:30+00:00",
        "lat": 34.67901669999999825222403160296380519866943359375,
        "lon": 33.36408329999999722303982707671821117401123046875
    },
    "last_point": {
        "ts": "2026-09-05T02:02:44+00:00",
        "lat": 34.4658332999999998946805135346949100494384765625,
        "lon": 33.2928332999999980756911099888384342193603515625
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 5, 2026 00:02 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 1h 59m
  • Data Points: 47 AIS positions
  • Period: 2026-09-05T00:02:56+00:00 to 2026-09-05T02:02:44+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 119.7999999999999971578290569595992565155029296875,
    "points_in_zone": 47,
    "first_point": {
        "ts": "2026-09-05T00:02:56+00:00",
        "lat": 34.709800000000001318767317570745944976806640625,
        "lon": 33.32294999999999873807610129006206989288330078125
    },
    "last_point": {
        "ts": "2026-09-05T02:02:44+00:00",
        "lat": 34.4658332999999998946805135346949100494384765625,
        "lon": 33.2928332999999980756911099888384342193603515625
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Sep 4, 2026 23:14 UTC 80/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 65 meters
  • Average Distance: 69 meters
  • Duration: 54 minutes
  • Period: 2026-09-04T23:14:31+00:00 to 2026-09-05T00:08:28+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 69m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 69m
Duration10/25Duration 54 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-05T05:45:05.498602+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.5,
    "avg_distance_m": 69,
    "distance_consistency_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 54,
    "overlap_duration_s": 3237,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T23:14:31+00:00",
        "end": "2026-09-05T00:08:28+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 69m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 54 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 69m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70993010000000111858753371052443981170654296875,
            "lon": 33.32266010000000022728272597305476665496826171875
        },
        "time_window": {
            "start_ts": "2026-09-04T23:14:31+00:00",
            "end_ts": "2026-09-05T00:08:28+00:00"
        },
        "searched_at": "2026-09-05T05:45:05.498602+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 23:08 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 2h 53m
  • Data Points: 58 AIS positions
  • Period: 2026-09-04T23:08:58+00:00 to 2026-09-05T02:02:44+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 173.80000000000001136868377216160297393798828125,
    "points_in_zone": 58,
    "first_point": {
        "ts": "2026-09-04T23:08:58+00:00",
        "lat": 34.70973330000000345307853422127664089202880859375,
        "lon": 33.3229333000000025322151486761868000030517578125
    },
    "last_point": {
        "ts": "2026-09-05T02:02:44+00:00",
        "lat": 34.4658332999999998946805135346949100494384765625,
        "lon": 33.2928332999999980756911099888384342193603515625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 23:08 UTC 75.0% ▼
  • Duration: 1h 39m
  • Radius: 754 meters
  • Data Points: 21 AIS positions
  • Centroid: 34.7095, 33.3239
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 753.5,
    "duration_minutes": 99.5,
    "points": 21,
    "centroid": {
        "lat": 34.70946109523809042229913757182657718658447265625,
        "lon": 33.32386508571428151981308474205434322357177734375
    },
    "bbox": {
        "min_lat": 34.70686669999999907076926319859921932220458984375,
        "min_lon": 33.3229333000000025322151486761868000030517578125,
        "max_lat": 34.709800000000001318767317570745944976806640625,
        "max_lon": 33.33146670000000000300133251585066318511962890625
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Sep 4, 2026 22:20 UTC 90/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 65 meters
  • Average Distance: 69 meters
  • Duration: 1h 48m
  • Period: 2026-09-04T22:20:27+00:00 to 2026-09-05T00:08:28+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 69m) for 108 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 69m
Duration20/25Duration 108 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-05T04:45:12.094782+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.5,
    "avg_distance_m": 68.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 2.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 108,
    "overlap_duration_s": 6481,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T22:20:27+00:00",
        "end": "2026-09-05T00:08:28+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 69m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 108 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 69m) for 108 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70992749999999915644366410560905933380126953125,
            "lon": 33.32265830000000050858943723142147064208984375
        },
        "time_window": {
            "start_ts": "2026-09-04T22:20:27+00:00",
            "end_ts": "2026-09-05T00:08:28+00:00"
        },
        "searched_at": "2026-09-05T04:45:12.094782+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 22:02 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 3h 59m
  • Data Points: 64 AIS positions
  • Period: 2026-09-04T22:02:56+00:00 to 2026-09-05T02:02:44+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 239.80000000000001136868377216160297393798828125,
    "points_in_zone": 64,
    "first_point": {
        "ts": "2026-09-04T22:02:56+00:00",
        "lat": 34.70971670000000131039996631443500518798828125,
        "lon": 33.32294999999999873807610129006206989288330078125
    },
    "last_point": {
        "ts": "2026-09-05T02:02:44+00:00",
        "lat": 34.4658332999999998946805135346949100494384765625,
        "lon": 33.2928332999999980756911099888384342193603515625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 22:02 UTC 75.0% ▼
  • Duration: 2h 45m
  • Radius: 773 meters
  • Data Points: 27 AIS positions
  • Centroid: 34.7095, 33.3237
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 773.1000000000000227373675443232059478759765625,
    "duration_minutes": 165.5,
    "points": 27,
    "centroid": {
        "lat": 34.7095191259259223670596838928759098052978515625,
        "lon": 33.3236629666666743787573068402707576751708984375
    },
    "bbox": {
        "min_lat": 34.70686669999999907076926319859921932220458984375,
        "min_lon": 33.3229333000000025322151486761868000030517578125,
        "max_lat": 34.709800000000001318767317570745944976806640625,
        "max_lon": 33.33146670000000000300133251585066318511962890625
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Sep 4, 2026 21:08 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 65 meters
  • Average Distance: 69 meters
  • Duration: 3 hours
  • Period: 2026-09-04T21:08:28+00:00 to 2026-09-05T00:08:28+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 69m) for 180 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 69m
Duration25/25Duration 180 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-05T03:45:02.132269+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.5,
    "avg_distance_m": 69.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 2.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 180,
    "overlap_duration_s": 10800,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T21:08:28+00:00",
        "end": "2026-09-05T00:08:28+00:00"
    },
    "points_count": {
        "vessel_a": 25,
        "vessel_b": 25
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 69m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 180 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 69m) for 180 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70992609999999700676198699511587619781494140625,
            "lon": 33.32265989999999789006324135698378086090087890625
        },
        "time_window": {
            "start_ts": "2026-09-04T21:08:28+00:00",
            "end_ts": "2026-09-05T00:08:28+00:00"
        },
        "searched_at": "2026-09-05T03:45:02.132269+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 21:02 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 4h 59m
  • Data Points: 72 AIS positions
  • Period: 2026-09-04T21:02:56+00:00 to 2026-09-05T02:02:44+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 299.80000000000001136868377216160297393798828125,
    "points_in_zone": 72,
    "first_point": {
        "ts": "2026-09-04T21:02:56+00:00",
        "lat": 34.709800000000001318767317570745944976806640625,
        "lon": 33.32298329999999708661562181077897548675537109375
    },
    "last_point": {
        "ts": "2026-09-05T02:02:44+00:00",
        "lat": 34.4658332999999998946805135346949100494384765625,
        "lon": 33.2928332999999980756911099888384342193603515625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 21:02 UTC 75.0% ▼
  • Duration: 3h 45m
  • Radius: 789 meters
  • Data Points: 35 AIS positions
  • Centroid: 34.7096, 33.3235
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 788.799999999999954525264911353588104248046875,
    "duration_minutes": 225.5,
    "points": 35,
    "centroid": {
        "lat": 34.7095699942857294217901653610169887542724609375,
        "lon": 33.32350333714285994801684864796698093414306640625
    },
    "bbox": {
        "min_lat": 34.70686669999999907076926319859921932220458984375,
        "min_lon": 33.3229333000000025322151486761868000030517578125,
        "max_lat": 34.709800000000001318767317570745944976806640625,
        "max_lon": 33.33146670000000000300133251585066318511962890625
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 20:08 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 5h 53m
  • Data Points: 80 AIS positions
  • Period: 2026-09-04T20:08:57+00:00 to 2026-09-05T02:02:44+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 353.80000000000001136868377216160297393798828125,
    "points_in_zone": 80,
    "first_point": {
        "ts": "2026-09-04T20:08:57+00:00",
        "lat": 34.70971670000000131039996631443500518798828125,
        "lon": 33.32296670000000204936441150493919849395751953125
    },
    "last_point": {
        "ts": "2026-09-05T02:02:44+00:00",
        "lat": 34.4658332999999998946805135346949100494384765625,
        "lon": 33.2928332999999980756911099888384342193603515625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 20:08 UTC 75.0% ▼
  • Duration: 4h 39m
  • Radius: 799 meters
  • Data Points: 43 AIS positions
  • Centroid: 34.7096, 33.3234
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 798.799999999999954525264911353588104248046875,
    "duration_minutes": 279.5,
    "points": 43,
    "centroid": {
        "lat": 34.70960658372093377010969561524689197540283203125,
        "lon": 33.32340349069767881928783026523888111114501953125
    },
    "bbox": {
        "min_lat": 34.70686669999999907076926319859921932220458984375,
        "min_lon": 33.3229333000000025322151486761868000030517578125,
        "max_lat": 34.70986669999999918445610092021524906158447265625,
        "max_lon": 33.33146670000000000300133251585066318511962890625
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Sep 4, 2026 20:08 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 65 meters
  • Average Distance: 69 meters
  • Duration: 4 hours
  • Period: 2026-09-04T20:08:29+00:00 to 2026-09-05T00:08:28+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 69m) for 240 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 69m
Duration25/25Duration 240 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-05T02:15:01.477915+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.5,
    "avg_distance_m": 69,
    "distance_consistency_m": 2.5,
    "duration_minutes": 240,
    "overlap_duration_s": 14399,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T20:08:29+00:00",
        "end": "2026-09-05T00:08:28+00:00"
    },
    "points_count": {
        "vessel_a": 33,
        "vessel_b": 33
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 69m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 240 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 69m) for 240 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70992729999999681922417948953807353973388671875,
            "lon": 33.322661699999997608756530098617076873779296875
        },
        "time_window": {
            "start_ts": "2026-09-04T20:08:29+00:00",
            "end_ts": "2026-09-05T00:08:28+00:00"
        },
        "searched_at": "2026-09-05T02:15:01.477915+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Sep 4, 2026 19:29 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 65 meters
  • Average Distance: 69 meters
  • Duration: 4h 39m
  • Period: 2026-09-04T19:29:27+00:00 to 2026-09-05T00:08:28+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 69m) for 279 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 69m
Duration25/25Duration 279 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-05T01:45:07.602273+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.5,
    "avg_distance_m": 68.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 2.5,
    "duration_minutes": 279,
    "overlap_duration_s": 16741,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T19:29:27+00:00",
        "end": "2026-09-05T00:08:28+00:00"
    },
    "points_count": {
        "vessel_a": 35,
        "vessel_b": 35
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 69m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 279 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 69m) for 279 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70992799999999789406501804478466510772705078125,
            "lon": 33.32266179999999877736627240665256977081298828125
        },
        "time_window": {
            "start_ts": "2026-09-04T19:29:27+00:00",
            "end_ts": "2026-09-05T00:08:28+00:00"
        },
        "searched_at": "2026-09-05T01:45:07.602273+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 19:05 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 26m
  • Data Points: 83 AIS positions
  • Period: 2026-09-04T19:35:56+00:00 to 2026-09-05T02:02:44+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 386.80000000000001136868377216160297393798828125,
    "points_in_zone": 83,
    "first_point": {
        "ts": "2026-09-04T19:35:56+00:00",
        "lat": 34.709783299999998007479007355868816375732421875,
        "lon": 33.32296670000000204936441150493919849395751953125
    },
    "last_point": {
        "ts": "2026-09-05T02:02:44+00:00",
        "lat": 34.4658332999999998946805135346949100494384765625,
        "lon": 33.2928332999999980756911099888384342193603515625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 19:05 UTC 75.0% ▼
  • Duration: 5h 42m
  • Radius: 807 meters
  • Data Points: 52 AIS positions
  • Centroid: 34.7096, 33.3233
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 806.5,
    "duration_minutes": 342.5,
    "points": 52,
    "centroid": {
        "lat": 34.709626596153839273029007017612457275390625,
        "lon": 33.3233221211538506167926243506371974945068359375
    },
    "bbox": {
        "min_lat": 34.70686669999999907076926319859921932220458984375,
        "min_lon": 33.32291670000000038953658076934516429901123046875,
        "max_lat": 34.70986669999999918445610092021524906158447265625,
        "max_lon": 33.33146670000000000300133251585066318511962890625
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 18:05 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 38m
  • Data Points: 73 AIS positions
  • Period: 2026-09-04T18:50:56+00:00 to 2026-09-05T01:28:54+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 398,
    "points_in_zone": 73,
    "first_point": {
        "ts": "2026-09-04T18:50:56+00:00",
        "lat": 34.70968330000000179325070348568260669708251953125,
        "lon": 33.32291670000000038953658076934516429901123046875
    },
    "last_point": {
        "ts": "2026-09-05T01:28:54+00:00",
        "lat": 34.581400000000002137312549166381359100341796875,
        "lon": 33.33465000000000344471118296496570110321044921875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 18:05 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 812 meters
  • Data Points: 62 AIS positions
  • Centroid: 34.7096, 33.3233
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 812,
    "duration_minutes": 396.5,
    "points": 62,
    "centroid": {
        "lat": 34.70963897096772399208930437453091144561767578125,
        "lon": 33.32326344677420593143324367702007293701171875
    },
    "bbox": {
        "min_lat": 34.70686669999999907076926319859921932220458984375,
        "min_lon": 33.32291670000000038953658076934516429901123046875,
        "max_lat": 34.70986669999999918445610092021524906158447265625,
        "max_lon": 33.33146670000000000300133251585066318511962890625
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Sep 4, 2026 18:02 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 65 meters
  • Average Distance: 69 meters
  • Duration: 6h 5m
  • Period: 2026-09-04T18:02:31+00:00 to 2026-09-05T00:08:28+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 69m) for 366 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 69m
Duration25/25Duration 366 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-05T00:30:01.482321+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.5,
    "avg_distance_m": 69.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 2.5,
    "duration_minutes": 365.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 21957,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T18:02:31+00:00",
        "end": "2026-09-05T00:08:28+00:00"
    },
    "points_count": {
        "vessel_a": 43,
        "vessel_b": 43
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 69m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 366 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 69m) for 366 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70992369999999738183760200627148151397705078125,
            "lon": 33.32266030000000256450221058912575244903564453125
        },
        "time_window": {
            "start_ts": "2026-09-04T18:02:31+00:00",
            "end_ts": "2026-09-05T00:08:28+00:00"
        },
        "searched_at": "2026-09-05T00:30:01.482321+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 17:56 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 65 meters
  • Average Distance: 69 meters
  • Duration: 6h 33m
  • Period: 2026-09-04T17:35:29+00:00 to 2026-09-05T00:08:28+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 69m) for 393 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 69m
Duration25/25Duration 393 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.5,
    "avg_distance_m": 69.2999999999999971578290569595992565155029296875,
    "distance_consistency_m": 2.5,
    "duration_minutes": 393,
    "overlap_duration_s": 23579,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T17:35:29+00:00",
        "end": "2026-09-05T00:08:28+00:00"
    },
    "points_count": {
        "vessel_a": 44,
        "vessel_b": 44
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 69m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 393 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 69m) for 393 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 17:02 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 64 AIS positions
  • Period: 2026-09-04T17:41:57+00:00 to 2026-09-05T00:17:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 396,
    "points_in_zone": 64,
    "first_point": {
        "ts": "2026-09-04T17:41:57+00:00",
        "lat": 34.70971670000000131039996631443500518798828125,
        "lon": 33.32294999999999873807610129006206989288330078125
    },
    "last_point": {
        "ts": "2026-09-05T00:17:57+00:00",
        "lat": 34.7097499999999996589394868351519107818603515625,
        "lon": 33.32296670000000204936441150493919849395751953125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 17:02 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 15 meters
  • Data Points: 64 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 15.300000000000000710542735760100185871124267578125,
    "duration_minutes": 396,
    "points": 64,
    "centroid": {
        "lat": 34.709730723437502319939085282385349273681640625,
        "lon": 33.3229570359375060206730267964303493499755859375
    },
    "bbox": {
        "min_lat": 34.70963330000000013342287275008857250213623046875,
        "min_lon": 33.32291670000000038953658076934516429901123046875,
        "max_lat": 34.70986669999999918445610092021524906158447265625,
        "max_lon": 33.32300000000000039790393202565610408782958984375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 16:11 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 65 meters
  • Average Distance: 70 meters
  • Duration: 6h 30m
  • Period: 2026-09-04T16:56:29+00:00 to 2026-09-04T23:26:30+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 65m, avg 70m) for 390 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 65m, avg 70m
Duration25/25Duration 390 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 65,
    "avg_distance_m": 69.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 2.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 390,
    "overlap_duration_s": 23401,
    "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": "2026-09-04T16:56:29+00:00",
        "end": "2026-09-04T23:26:30+00:00"
    },
    "points_count": {
        "vessel_a": 45,
        "vessel_b": 45
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 65m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 390 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 65m, avg 70m) for 390 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 16:02 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 63 AIS positions
  • Period: 2026-09-04T16:50:57+00:00 to 2026-09-04T23:26:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 396,
    "points_in_zone": 63,
    "first_point": {
        "ts": "2026-09-04T16:50:57+00:00",
        "lat": 34.70971670000000131039996631443500518798828125,
        "lon": 33.32296670000000204936441150493919849395751953125
    },
    "last_point": {
        "ts": "2026-09-04T23:26:57+00:00",
        "lat": 34.70973330000000345307853422127664089202880859375,
        "lon": 33.32294999999999873807610129006206989288330078125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 16:02 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 16 meters
  • Data Points: 63 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 15.800000000000000710542735760100185871124267578125,
    "duration_minutes": 396,
    "points": 63,
    "centroid": {
        "lat": 34.709726187301583877342636696994304656982421875,
        "lon": 33.32295714761905713885425939224660396575927734375
    },
    "bbox": {
        "min_lat": 34.70963330000000013342287275008857250213623046875,
        "min_lon": 33.32291670000000038953658076934516429901123046875,
        "max_lat": 34.70986669999999918445610092021524906158447265625,
        "max_lon": 33.32300000000000039790393202565610408782958984375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 15:11 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 65 meters
  • Average Distance: 70 meters
  • Duration: 6h 14m
  • Period: 2026-09-04T15:41:29+00:00 to 2026-09-04T21:56:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 65m, avg 70m) for 375 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 65m, avg 70m
Duration25/25Duration 375 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 65,
    "avg_distance_m": 69.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 374.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 22496,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T15:41:29+00:00",
        "end": "2026-09-04T21:56:25+00:00"
    },
    "points_count": {
        "vessel_a": 45,
        "vessel_b": 45
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 65m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 375 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 65m, avg 70m) for 375 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 15:02 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 67 AIS positions
  • Period: 2026-09-04T15:56:57+00:00 to 2026-09-04T22:26:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 67,
    "first_point": {
        "ts": "2026-09-04T15:56:57+00:00",
        "lat": 34.7097499999999996589394868351519107818603515625,
        "lon": 33.32294999999999873807610129006206989288330078125
    },
    "last_point": {
        "ts": "2026-09-04T22:26:57+00:00",
        "lat": 34.7097499999999996589394868351519107818603515625,
        "lon": 33.32294999999999873807610129006206989288330078125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 15:02 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 16 meters
  • Data Points: 67 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 15.699999999999999289457264239899814128875732421875,
    "duration_minutes": 390,
    "points": 67,
    "centroid": {
        "lat": 34.70972686268657270147741655819118022918701171875,
        "lon": 33.32295647164181673360872082412242889404296875
    },
    "bbox": {
        "min_lat": 34.70963330000000013342287275008857250213623046875,
        "min_lon": 33.32291670000000038953658076934516429901123046875,
        "max_lat": 34.70986669999999918445610092021524906158447265625,
        "max_lon": 33.32300000000000039790393202565610408782958984375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Sep 4, 2026 14:09 UTC 70/100 ▼
Vessel A: IMO 9422639 (TWIST) Liberia
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 318 meters
  • Average Distance: 325 meters
  • Duration: 1h 15m
  • Period: 2026-09-04T14:09:46+00:00 to 2026-09-04T15:24:47+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 318m, avg 325m) for 75 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 318m, avg 325m
Duration15/25Duration 75 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-04T20:45:15.256305+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021552,
        "imo": 9422639,
        "name": "TWIST",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 318,
    "avg_distance_m": 324.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 4.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 75,
    "overlap_duration_s": 4501,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T14:09:46+00:00",
        "end": "2026-09-04T15:24:47+00:00"
    },
    "points_count": {
        "vessel_a": 15,
        "vessel_b": 15
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 318m, avg 325m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 75 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 318m, avg 325m) for 75 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7089660999999978230334818363189697265625,
            "lon": 33.321436599999998406929080374538898468017578125
        },
        "time_window": {
            "start_ts": "2026-09-04T14:09:46+00:00",
            "end_ts": "2026-09-04T15:24:47+00:00"
        },
        "searched_at": "2026-09-04T20:45:15.256305+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 14:05 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 70 AIS positions
  • Period: 2026-09-04T14:44:58+00:00 to 2026-09-04T21:17:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 70,
    "first_point": {
        "ts": "2026-09-04T14:44:58+00:00",
        "lat": 34.70971670000000131039996631443500518798828125,
        "lon": 33.32298329999999708661562181077897548675537109375
    },
    "last_point": {
        "ts": "2026-09-04T21:17:57+00:00",
        "lat": 34.7097499999999996589394868351519107818603515625,
        "lon": 33.32296670000000204936441150493919849395751953125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 14:05 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 16 meters
  • Data Points: 70 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 16,
    "duration_minutes": 393,
    "points": 70,
    "centroid": {
        "lat": 34.70972428428571987524264841340482234954833984375,
        "lon": 33.3229559571428666231440729461610317230224609375
    },
    "bbox": {
        "min_lat": 34.70963330000000013342287275008857250213623046875,
        "min_lon": 33.32291670000000038953658076934516429901123046875,
        "max_lat": 34.70986669999999918445610092021524906158447265625,
        "max_lon": 33.32300000000000039790393202565610408782958984375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 14:02 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 65 meters
  • Average Distance: 70 meters
  • Duration: 6h 20m
  • Period: 2026-09-04T14:53:29+00:00 to 2026-09-04T21:14:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 65m, avg 70m) for 381 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 65m, avg 70m
Duration25/25Duration 381 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 65,
    "avg_distance_m": 69.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 380.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 22857,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T14:53:29+00:00",
        "end": "2026-09-04T21:14:26+00:00"
    },
    "points_count": {
        "vessel_a": 44,
        "vessel_b": 44
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 65m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 381 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 65m, avg 70m) for 381 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 13:26 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 66 meters
  • Average Distance: 70 meters
  • Duration: 6h 18m
  • Period: 2026-09-04T13:53:24+00:00 to 2026-09-04T20:11:31+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 66m, avg 70m) for 378 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 66m, avg 70m
Duration25/25Duration 378 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 66,
    "avg_distance_m": 70.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 2,
    "duration_minutes": 378.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 22687,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T13:53:24+00:00",
        "end": "2026-09-04T20:11:31+00:00"
    },
    "points_count": {
        "vessel_a": 42,
        "vessel_b": 42
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 66m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 378 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 66m, avg 70m) for 378 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Sep 4, 2026 13:06 UTC 80/100 ▼
Vessel A: IMO 9422639 (TWIST) Liberia
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 318 meters
  • Average Distance: 324 meters
  • Duration: 2h 18m
  • Period: 2026-09-04T13:06:45+00:00 to 2026-09-04T15:24:47+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 318m, avg 324m) for 138 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 318m, avg 324m
Duration25/25Duration 138 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-04T19:45:07.417969+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021552,
        "imo": 9422639,
        "name": "TWIST",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 318,
    "avg_distance_m": 324.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 3.5,
    "duration_minutes": 138,
    "overlap_duration_s": 8282,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T13:06:45+00:00",
        "end": "2026-09-04T15:24:47+00:00"
    },
    "points_count": {
        "vessel_a": 24,
        "vessel_b": 24
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 318m, avg 324m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 138 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 318m, avg 324m) for 138 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70895440000000320424078381620347499847412109375,
            "lon": 33.321453800000000455838744528591632843017578125
        },
        "time_window": {
            "start_ts": "2026-09-04T13:06:45+00:00",
            "end_ts": "2026-09-04T15:24:47+00:00"
        },
        "searched_at": "2026-09-04T19:45:07.417969+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 13:05 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 27m
  • Data Points: 69 AIS positions
  • Period: 2026-09-04T13:53:59+00:00 to 2026-09-04T20:20:58+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 387,
    "points_in_zone": 69,
    "first_point": {
        "ts": "2026-09-04T13:53:59+00:00",
        "lat": 34.7097499999999996589394868351519107818603515625,
        "lon": 33.32296670000000204936441150493919849395751953125
    },
    "last_point": {
        "ts": "2026-09-04T20:20:58+00:00",
        "lat": 34.70973330000000345307853422127664089202880859375,
        "lon": 33.3229333000000025322151486761868000030517578125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 13:05 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 10 meters
  • Data Points: 69 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 9.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 387,
    "points": 69,
    "centroid": {
        "lat": 34.70971932173912222197031951509416103363037109375,
        "lon": 33.32295338840581422346076578833162784576416015625
    },
    "bbox": {
        "min_lat": 34.70963330000000013342287275008857250213623046875,
        "min_lon": 33.32289999999999707824827055446803569793701171875,
        "max_lat": 34.709800000000001318767317570745944976806640625,
        "max_lon": 33.32300000000000039790393202565610408782958984375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 12:23 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 72 AIS positions
  • Period: 2026-09-04T12:50:57+00:00 to 2026-09-04T19:23:56+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 72,
    "first_point": {
        "ts": "2026-09-04T12:50:57+00:00",
        "lat": 34.70968330000000179325070348568260669708251953125,
        "lon": 33.32298329999999708661562181077897548675537109375
    },
    "last_point": {
        "ts": "2026-09-04T19:23:56+00:00",
        "lat": 34.7097499999999996589394868351519107818603515625,
        "lon": 33.32296670000000204936441150493919849395751953125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 12:23 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 9 meters
  • Data Points: 72 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 9.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 393,
    "points": 72,
    "centroid": {
        "lat": 34.70971735972221239308055373840034008026123046875,
        "lon": 33.32295579444445365879801101982593536376953125
    },
    "bbox": {
        "min_lat": 34.70963330000000013342287275008857250213623046875,
        "min_lon": 33.32289999999999707824827055446803569793701171875,
        "max_lat": 34.709800000000001318767317570745944976806640625,
        "max_lon": 33.32300000000000039790393202565610408782958984375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 12:18 UTC 80/100 ▼
Vessel A: IMO 9422639 (TWIST) Liberia
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 317 meters
  • Average Distance: 324 meters
  • Duration: 3h 6m
  • Period: 2026-09-04T12:18:46+00:00 to 2026-09-04T15:24:47+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 317m, avg 324m) for 186 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 324m
Duration25/25Duration 186 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021552,
        "imo": 9422639,
        "name": "TWIST",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 317.30000000000001136868377216160297393798828125,
    "avg_distance_m": 323.5,
    "distance_consistency_m": 3.5,
    "duration_minutes": 186,
    "overlap_duration_s": 11161,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T12:18:46+00:00",
        "end": "2026-09-04T15:24:47+00:00"
    },
    "points_count": {
        "vessel_a": 35,
        "vessel_b": 35
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 324m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 186 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 317m, avg 324m) for 186 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 12:17 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 67 meters
  • Average Distance: 70 meters
  • Duration: 6h 3m
  • Period: 2026-09-04T12:56:25+00:00 to 2026-09-04T18:59:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 67m, avg 70m) for 363 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 67m, avg 70m
Duration25/25Duration 363 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 66.7999999999999971578290569595992565155029296875,
    "avg_distance_m": 70.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 363,
    "overlap_duration_s": 21781,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T12:56:25+00:00",
        "end": "2026-09-04T18:59:26+00:00"
    },
    "points_count": {
        "vessel_a": 44,
        "vessel_b": 44
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 67m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 363 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 67m, avg 70m) for 363 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 11:19 UTC 95/100 ▼
Vessel A: IMO 9407354 (HORIZON ARMONIA) LIBERIA
Vessel B: IMO 9976874 (NAVIG8 EXPRESS) Singapore
  • Minimum Distance: 64 meters
  • Average Distance: 70 meters
  • Duration: 5h 54m
  • Period: 2026-09-04T11:47:58+00:00 to 2026-09-04T17:41:57+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (HORIZON ARMONIA and NAVIG8 EXPRESS) maintained close proximity (min 64m, avg 70m) for 354 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 70m
Duration25/25Duration 354 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "min_distance_m": 63.60000000000000142108547152020037174224853515625,
    "avg_distance_m": 70.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 354,
    "overlap_duration_s": 21239,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-09-04T11:47:58+00:00",
        "end": "2026-09-04T17:41:57+00:00"
    },
    "points_count": {
        "vessel_a": 57,
        "vessel_b": 57
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 354 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HORIZON ARMONIA and NAVIG8 EXPRESS) maintained close proximity (min 64m, avg 70m) for 354 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 11:03 UTC 80/100 ▼
Vessel A: IMO 9407354 (HORIZON ARMONIA) LIBERIA
Vessel B: IMO 9422639 (TWIST) Liberia
  • Minimum Distance: 317 meters
  • Average Distance: 323 meters
  • Duration: 3h 55m
  • Period: 2026-09-04T11:19:46+00:00 to 2026-09-04T15:14:57+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (HORIZON ARMONIA and TWIST) maintained close proximity (min 317m, avg 323m) for 235 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 323m
Duration25/25Duration 235 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636021552,
        "imo": 9422639,
        "name": "TWIST",
        "flag": "Liberia"
    },
    "min_distance_m": 317.30000000000001136868377216160297393798828125,
    "avg_distance_m": 323.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 3.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 235.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 14111,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-09-04T11:19:46+00:00",
        "end": "2026-09-04T15:14:57+00:00"
    },
    "points_count": {
        "vessel_a": 39,
        "vessel_b": 39
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 323m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 235 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HORIZON ARMONIA and TWIST) maintained close proximity (min 317m, avg 323m) for 235 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 11:01 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 66 AIS positions
  • Period: 2026-09-04T11:41:56+00:00 to 2026-09-04T18:17:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 396,
    "points_in_zone": 66,
    "first_point": {
        "ts": "2026-09-04T11:41:56+00:00",
        "lat": 34.70973330000000345307853422127664089202880859375,
        "lon": 33.32296670000000204936441150493919849395751953125
    },
    "last_point": {
        "ts": "2026-09-04T18:17:57+00:00",
        "lat": 34.70968330000000179325070348568260669708251953125,
        "lon": 33.32294999999999873807610129006206989288330078125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 11:01 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 10 meters
  • Data Points: 66 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 9.800000000000000710542735760100185871124267578125,
    "duration_minutes": 396,
    "points": 66,
    "centroid": {
        "lat": 34.7097214636363560202880762517452239990234375,
        "lon": 33.3229583393939492452773265540599822998046875
    },
    "bbox": {
        "min_lat": 34.70963330000000013342287275008857250213623046875,
        "min_lon": 33.32289999999999707824827055446803569793701171875,
        "max_lat": 34.709800000000001318767317570745944976806640625,
        "max_lon": 33.32298329999999708661562181077897548675537109375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 10:56 UTC 95/100 ▼
Vessel A: IMO 9407354 (HORIZON ARMONIA) LIBERIA
Vessel B: IMO 9976874 (NAVIG8 EXPRESS) Singapore
  • Minimum Distance: 63 meters
  • Average Distance: 70 meters
  • Duration: 6h 28m
  • Period: 2026-09-04T10:58:49+00:00 to 2026-09-04T17:26:56+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (HORIZON ARMONIA and NAVIG8 EXPRESS) maintained close proximity (min 63m, avg 70m) for 388 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 63m, avg 70m
Duration25/25Duration 388 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "min_distance_m": 63.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 69.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 2.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 388.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23287,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-09-04T10:58:49+00:00",
        "end": "2026-09-04T17:26:56+00:00"
    },
    "points_count": {
        "vessel_a": 67,
        "vessel_b": 67
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 63m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 388 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HORIZON ARMONIA and NAVIG8 EXPRESS) maintained close proximity (min 63m, avg 70m) for 388 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 10:42 UTC 80/100 ▼
Vessel A: IMO 9407354 (HORIZON ARMONIA) LIBERIA
Vessel B: IMO 9422639 (TWIST) Liberia
  • Minimum Distance: 317 meters
  • Average Distance: 324 meters
  • Duration: 5h 1m
  • Period: 2026-09-04T10:13:45+00:00 to 2026-09-04T15:14:57+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (HORIZON ARMONIA and TWIST) maintained close proximity (min 317m, avg 324m) for 301 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 324m
Duration25/25Duration 301 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636021552,
        "imo": 9422639,
        "name": "TWIST",
        "flag": "Liberia"
    },
    "min_distance_m": 317.30000000000001136868377216160297393798828125,
    "avg_distance_m": 323.5,
    "distance_consistency_m": 3.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 301.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 18072,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-09-04T10:13:45+00:00",
        "end": "2026-09-04T15:14:57+00:00"
    },
    "points_count": {
        "vessel_a": 47,
        "vessel_b": 47
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 324m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 301 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HORIZON ARMONIA and TWIST) maintained close proximity (min 317m, avg 324m) for 301 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 10:04 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 34m
  • Data Points: 68 AIS positions
  • Period: 2026-09-04T10:52:45+00:00 to 2026-09-04T17:26:56+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 394.19999999999998863131622783839702606201171875,
    "points_in_zone": 68,
    "first_point": {
        "ts": "2026-09-04T10:52:45+00:00",
        "lat": 34.709800000000001318767317570745944976806640625,
        "lon": 33.32296670000000204936441150493919849395751953125
    },
    "last_point": {
        "ts": "2026-09-04T17:26:56+00:00",
        "lat": 34.7096999999999979991116560995578765869140625,
        "lon": 33.32296670000000204936441150493919849395751953125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 10:04 UTC 75.0% ▼
  • Duration: 6h 34m
  • Radius: 9 meters
  • Data Points: 68 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 394.19999999999998863131622783839702606201171875,
    "points": 68,
    "centroid": {
        "lat": 34.7097274514705844694617553614079952239990234375,
        "lon": 33.3229561323529566152501502074301242828369140625
    },
    "bbox": {
        "min_lat": 34.70965000000000344471118296496570110321044921875,
        "min_lon": 33.32289999999999707824827055446803569793701171875,
        "max_lat": 34.709800000000001318767317570745944976806640625,
        "max_lon": 33.32298329999999708661562181077897548675537109375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Sep 4, 2026 09:04 UTC 80/100 ▼
Vessel A: IMO 9407354 (HORIZON ARMONIA) LIBERIA
Vessel B: IMO 9422639 (TWIST) Liberia
  • Minimum Distance: 317 meters
  • Average Distance: 323 meters
  • Duration: 6h 10m
  • Period: 2026-09-04T09:04:45+00:00 to 2026-09-04T15:14:57+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (HORIZON ARMONIA and TWIST) maintained close proximity (min 317m, avg 323m) for 370 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 323m
Duration25/25Duration 370 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-04T15:45:01.312665+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636021552,
        "imo": 9422639,
        "name": "TWIST",
        "flag": "Liberia"
    },
    "min_distance_m": 316.69999999999998863131622783839702606201171875,
    "avg_distance_m": 323.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 3.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 370.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 22212,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "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": "2026-09-04T09:04:45+00:00",
        "end": "2026-09-04T15:14:57+00:00"
    },
    "points_count": {
        "vessel_a": 59,
        "vessel_b": 59
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 323m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 370 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HORIZON ARMONIA and TWIST) maintained close proximity (min 317m, avg 323m) for 370 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7089392999999972744262777268886566162109375,
            "lon": 33.32147590000000292320692096836864948272705078125
        },
        "time_window": {
            "start_ts": "2026-09-04T09:04:45+00:00",
            "end_ts": "2026-09-04T15:14:57+00:00"
        },
        "searched_at": "2026-09-04T15:45:01.312665+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 09:01 UTC 95/100 ▼
Vessel A: IMO 9407354 (HORIZON ARMONIA) LIBERIA
Vessel B: IMO 9976874 (NAVIG8 EXPRESS) Singapore
  • Minimum Distance: 63 meters
  • Average Distance: 70 meters
  • Duration: 6h 19m
  • Period: 2026-09-04T09:28:46+00:00 to 2026-09-04T15:47:57+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (HORIZON ARMONIA and NAVIG8 EXPRESS) maintained close proximity (min 63m, avg 70m) for 379 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 63m, avg 70m
Duration25/25Duration 379 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "min_distance_m": 63.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 69.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 2,
    "duration_minutes": 379.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 22751,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "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": "2026-09-04T09:28:46+00:00",
        "end": "2026-09-04T15:47:57+00:00"
    },
    "points_count": {
        "vessel_a": 59,
        "vessel_b": 59
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 63m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 379 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HORIZON ARMONIA and NAVIG8 EXPRESS) maintained close proximity (min 63m, avg 70m) for 379 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 09:01 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 34m
  • Data Points: 64 AIS positions
  • Period: 2026-09-04T09:55:43+00:00 to 2026-09-04T16:29:58+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 394.19999999999998863131622783839702606201171875,
    "points_in_zone": 64,
    "first_point": {
        "ts": "2026-09-04T09:55:43+00:00",
        "lat": 34.70971670000000131039996631443500518798828125,
        "lon": 33.32298329999999708661562181077897548675537109375
    },
    "last_point": {
        "ts": "2026-09-04T16:29:58+00:00",
        "lat": 34.7096999999999979991116560995578765869140625,
        "lon": 33.32294999999999873807610129006206989288330078125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 09:01 UTC 75.0% ▼
  • Duration: 6h 34m
  • Radius: 8 meters
  • Data Points: 64 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 394.19999999999998863131622783839702606201171875,
    "points": 64,
    "centroid": {
        "lat": 34.70972942968749208603185252286493778228759765625,
        "lon": 33.32295729375001513972165412269532680511474609375
    },
    "bbox": {
        "min_lat": 34.70968330000000179325070348568260669708251953125,
        "min_lon": 33.32289999999999707824827055446803569793701171875,
        "max_lat": 34.709800000000001318767317570745944976806640625,
        "max_lon": 33.32298329999999708661562181077897548675537109375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 08:07 UTC 95/100 ▼
Vessel A: IMO 9407354 (HORIZON ARMONIA) LIBERIA
Vessel B: IMO 9976874 (NAVIG8 EXPRESS) Singapore
  • Minimum Distance: 63 meters
  • Average Distance: 70 meters
  • Duration: 6h 28m
  • Period: 2026-09-04T08:25:42+00:00 to 2026-09-04T14:53:56+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (HORIZON ARMONIA and NAVIG8 EXPRESS) maintained close proximity (min 63m, avg 70m) for 388 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 63m, avg 70m
Duration25/25Duration 388 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "min_distance_m": 63.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 69.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 2.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 388.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 23294,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "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": "2026-09-04T08:25:42+00:00",
        "end": "2026-09-04T14:53:56+00:00"
    },
    "points_count": {
        "vessel_a": 62,
        "vessel_b": 62
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 63m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 388 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HORIZON ARMONIA and NAVIG8 EXPRESS) maintained close proximity (min 63m, avg 70m) for 388 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 08:03 UTC 80/100 ▼
Vessel A: IMO 9407354 (HORIZON ARMONIA) LIBERIA
Vessel B: IMO 9422639 (TWIST) Liberia
  • Minimum Distance: 317 meters
  • Average Distance: 323 meters
  • Duration: 6h 25m
  • Period: 2026-09-04T08:49:43+00:00 to 2026-09-04T15:14:57+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (HORIZON ARMONIA and TWIST) maintained close proximity (min 317m, avg 323m) for 385 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 323m
Duration25/25Duration 385 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636021552,
        "imo": 9422639,
        "name": "TWIST",
        "flag": "Liberia"
    },
    "min_distance_m": 316.69999999999998863131622783839702606201171875,
    "avg_distance_m": 323,
    "distance_consistency_m": 3.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 385.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 23114,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "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": "2026-09-04T08:49:43+00:00",
        "end": "2026-09-04T15:14:57+00:00"
    },
    "points_count": {
        "vessel_a": 63,
        "vessel_b": 63
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 323m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 385 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HORIZON ARMONIA and TWIST) maintained close proximity (min 317m, avg 323m) for 385 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 08:01 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 34m
  • Data Points: 64 AIS positions
  • Period: 2026-09-04T08:40:48+00:00 to 2026-09-04T15:14:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 394.1000000000000227373675443232059478759765625,
    "points_in_zone": 64,
    "first_point": {
        "ts": "2026-09-04T08:40:48+00:00",
        "lat": 34.70971670000000131039996631443500518798828125,
        "lon": 33.32294999999999873807610129006206989288330078125
    },
    "last_point": {
        "ts": "2026-09-04T15:14:57+00:00",
        "lat": 34.7097499999999996589394868351519107818603515625,
        "lon": 33.32294999999999873807610129006206989288330078125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 08:01 UTC 75.0% ▼
  • Duration: 6h 34m
  • Radius: 12 meters
  • Data Points: 64 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 12.300000000000000710542735760100185871124267578125,
    "duration_minutes": 394.1000000000000227373675443232059478759765625,
    "points": 64,
    "centroid": {
        "lat": 34.7097270859374731344360043294727802276611328125,
        "lon": 33.32295703281251775251803337596356868743896484375
    },
    "bbox": {
        "min_lat": 34.709616699999997990744304843246936798095703125,
        "min_lon": 33.32289999999999707824827055446803569793701171875,
        "max_lat": 34.709800000000001318767317570745944976806640625,
        "max_lon": 33.32298329999999708661562181077897548675537109375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 07:06 UTC 80/100 ▼
Vessel A: IMO 9407354 (HORIZON ARMONIA) LIBERIA
Vessel B: IMO 9422639 (TWIST) Liberia
  • Minimum Distance: 317 meters
  • Average Distance: 323 meters
  • Duration: 6h 22m
  • Period: 2026-09-04T07:58:42+00:00 to 2026-09-04T14:20:58+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (HORIZON ARMONIA and TWIST) maintained close proximity (min 317m, avg 323m) for 382 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 323m
Duration25/25Duration 382 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 636021552,
        "imo": 9422639,
        "name": "TWIST",
        "flag": "Liberia"
    },
    "min_distance_m": 316.69999999999998863131622783839702606201171875,
    "avg_distance_m": 322.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 2.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 382.30000000000001136868377216160297393798828125,
    "overlap_duration_s": 22936,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "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": "2026-09-04T07:58:42+00:00",
        "end": "2026-09-04T14:20:58+00:00"
    },
    "points_count": {
        "vessel_a": 66,
        "vessel_b": 66
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 323m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 382 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HORIZON ARMONIA and TWIST) maintained close proximity (min 317m, avg 323m) for 382 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 07:04 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 28m
  • Data Points: 67 AIS positions
  • Period: 2026-09-04T07:52:44+00:00 to 2026-09-04T14:20:58+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 388.19999999999998863131622783839702606201171875,
    "points_in_zone": 67,
    "first_point": {
        "ts": "2026-09-04T07:52:44+00:00",
        "lat": 34.70973330000000345307853422127664089202880859375,
        "lon": 33.32296670000000204936441150493919849395751953125
    },
    "last_point": {
        "ts": "2026-09-04T14:20:58+00:00",
        "lat": 34.70971670000000131039996631443500518798828125,
        "lon": 33.32289999999999707824827055446803569793701171875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 07:04 UTC 75.0% ▼
  • Duration: 6h 28m
  • Radius: 13 meters
  • Data Points: 67 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 12.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 388.19999999999998863131622783839702606201171875,
    "points": 67,
    "centroid": {
        "lat": 34.70972985074626393497965182177722454071044921875,
        "lon": 33.32295821044777284214433166198432445526123046875
    },
    "bbox": {
        "min_lat": 34.709616699999997990744304843246936798095703125,
        "min_lon": 33.32289999999999707824827055446803569793701171875,
        "max_lat": 34.709800000000001318767317570745944976806640625,
        "max_lon": 33.32300000000000039790393202565610408782958984375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 07:02 UTC 95/100 ▼
Vessel A: IMO 9407354 (HORIZON ARMONIA) LIBERIA
Vessel B: IMO 9976874 (NAVIG8 EXPRESS) Singapore
  • Minimum Distance: 63 meters
  • Average Distance: 70 meters
  • Duration: 6h 16m
  • Period: 2026-09-04T07:52:44+00:00 to 2026-09-04T14:08:56+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (HORIZON ARMONIA and NAVIG8 EXPRESS) maintained close proximity (min 63m, avg 70m) for 376 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 63m, avg 70m
Duration25/25Duration 376 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "vessel_b": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "min_distance_m": 63.2000000000000028421709430404007434844970703125,
    "avg_distance_m": 69.5,
    "distance_consistency_m": 2.5,
    "duration_minutes": 376.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 22572,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-09-04T07:52:44+00:00",
        "end": "2026-09-04T14:08:56+00:00"
    },
    "points_count": {
        "vessel_a": 65,
        "vessel_b": 65
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 63m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 376 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (HORIZON ARMONIA and NAVIG8 EXPRESS) maintained close proximity (min 63m, avg 70m) for 376 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Sep 4, 2026 06:03 UTC 80/100 ▼
Vessel A: IMO 9422639 (TWIST) Liberia
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 317 meters
  • Average Distance: 324 meters
  • Duration: 4h 27m
  • Period: 2026-09-04T06:03:42+00:00 to 2026-09-04T10:30:41+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 317m, avg 324m) for 267 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 324m
Duration25/25Duration 267 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-04T12:45:09.184726+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021552,
        "imo": 9422639,
        "name": "TWIST",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 316.69999999999998863131622783839702606201171875,
    "avg_distance_m": 323.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 267,
    "overlap_duration_s": 16019,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T06:03:42+00:00",
        "end": "2026-09-04T10:30:41+00:00"
    },
    "points_count": {
        "vessel_a": 51,
        "vessel_b": 51
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 324m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 267 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 317m, avg 324m) for 267 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7089280000000002246451913379132747650146484375,
            "lon": 33.32149170000000282243490801192820072174072265625
        },
        "time_window": {
            "start_ts": "2026-09-04T06:03:42+00:00",
            "end_ts": "2026-09-04T10:30:41+00:00"
        },
        "searched_at": "2026-09-04T12:45:09.184726+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Sep 4, 2026 06:02 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 64 meters
  • Average Distance: 70 meters
  • Duration: 4h 30m
  • Period: 2026-09-04T06:02:22+00:00 to 2026-09-04T10:32:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 70m) for 270 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 70m
Duration25/25Duration 270 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-04T12:45:06.467312+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.400000000000005684341886080801486968994140625,
    "avg_distance_m": 70.2999999999999971578290569595992565155029296875,
    "distance_consistency_m": 2.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 270.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 16204,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T06:02:22+00:00",
        "end": "2026-09-04T10:32:26+00:00"
    },
    "points_count": {
        "vessel_a": 41,
        "vessel_b": 41
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 270 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 70m) for 270 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7099232999999998128259903751313686370849609375,
            "lon": 33.32266829999999657729858881793916225433349609375
        },
        "time_window": {
            "start_ts": "2026-09-04T06:02:22+00:00",
            "end_ts": "2026-09-04T10:32:26+00:00"
        },
        "searched_at": "2026-09-04T12:45:06.467312+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 06:01 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 31m
  • Data Points: 76 AIS positions
  • Period: 2026-09-04T06:52:44+00:00 to 2026-09-04T13:23:56+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 391.19999999999998863131622783839702606201171875,
    "points_in_zone": 76,
    "first_point": {
        "ts": "2026-09-04T06:52:44+00:00",
        "lat": 34.70971670000000131039996631443500518798828125,
        "lon": 33.32303329999999874644345254637300968170166015625
    },
    "last_point": {
        "ts": "2026-09-04T13:23:56+00:00",
        "lat": 34.70971670000000131039996631443500518798828125,
        "lon": 33.32298329999999708661562181077897548675537109375
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 06:01 UTC 75.0% ▼
  • Duration: 6h 31m
  • Radius: 13 meters
  • Data Points: 76 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 12.699999999999999289457264239899814128875732421875,
    "duration_minutes": 391.19999999999998863131622783839702606201171875,
    "points": 76,
    "centroid": {
        "lat": 34.70973091973684176991810090839862823486328125,
        "lon": 33.32296271842107415750433574430644512176513671875
    },
    "bbox": {
        "min_lat": 34.709616699999997990744304843246936798095703125,
        "min_lon": 33.32289999999999707824827055446803569793701171875,
        "max_lat": 34.709800000000001318767317570745944976806640625,
        "max_lon": 33.32303329999999874644345254637300968170166015625
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Sep 4, 2026 05:06 UTC 80/100 ▼
Vessel A: IMO 9422639 (TWIST) Liberia
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 317 meters
  • Average Distance: 324 meters
  • Duration: 5h 23m
  • Period: 2026-09-04T05:06:46+00:00 to 2026-09-04T10:30:41+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 317m, avg 324m) for 324 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 324m
Duration25/25Duration 324 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-09-04T11:45:04.543040+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021552,
        "imo": 9422639,
        "name": "TWIST",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 316.69999999999998863131622783839702606201171875,
    "avg_distance_m": 323.5,
    "distance_consistency_m": 3,
    "duration_minutes": 323.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 19435,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T05:06:46+00:00",
        "end": "2026-09-04T10:30:41+00:00"
    },
    "points_count": {
        "vessel_a": 67,
        "vessel_b": 67
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 324m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 324 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 317m, avg 324m) for 324 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70892380000000088102751760743558406829833984375,
            "lon": 33.32149259999999912906787358224391937255859375
        },
        "time_window": {
            "start_ts": "2026-09-04T05:06:46+00:00",
            "end_ts": "2026-09-04T10:30:41+00:00"
        },
        "searched_at": "2026-09-04T11:45:04.543040+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 05:04 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 64 meters
  • Average Distance: 71 meters
  • Duration: 5h 24m
  • Period: 2026-09-04T05:08:24+00:00 to 2026-09-04T10:32:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 70m) for 324 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 70m
Duration25/25Duration 324 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.400000000000005684341886080801486968994140625,
    "avg_distance_m": 70.5,
    "distance_consistency_m": 2.5,
    "duration_minutes": 324,
    "overlap_duration_s": 19442,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T05:08:24+00:00",
        "end": "2026-09-04T10:32:26+00:00"
    },
    "points_count": {
        "vessel_a": 47,
        "vessel_b": 47
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 324 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 70m) for 324 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 05:04 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 34m
  • Data Points: 77 AIS positions
  • Period: 2026-09-04T05:55:46+00:00 to 2026-09-04T12:29:58+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 394.19999999999998863131622783839702606201171875,
    "points_in_zone": 77,
    "first_point": {
        "ts": "2026-09-04T05:55:46+00:00",
        "lat": 34.70971670000000131039996631443500518798828125,
        "lon": 33.32296670000000204936441150493919849395751953125
    },
    "last_point": {
        "ts": "2026-09-04T12:29:58+00:00",
        "lat": 34.7097499999999996589394868351519107818603515625,
        "lon": 33.32294999999999873807610129006206989288330078125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 05:04 UTC 75.0% ▼
  • Duration: 6h 34m
  • Radius: 13 meters
  • Data Points: 77 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 12.699999999999999289457264239899814128875732421875,
    "duration_minutes": 394.19999999999998863131622783839702606201171875,
    "points": 77,
    "centroid": {
        "lat": 34.7097313844155763717935769818723201751708984375,
        "lon": 33.32296363376625691898880177177488803863525390625
    },
    "bbox": {
        "min_lat": 34.709616699999997990744304843246936798095703125,
        "min_lon": 33.32289999999999707824827055446803569793701171875,
        "max_lat": 34.709800000000001318767317570745944976806640625,
        "max_lon": 33.32303329999999874644345254637300968170166015625
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 04:03 UTC 80/100 ▼
Vessel A: IMO 9422639 (TWIST) Liberia
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 317 meters
  • Average Distance: 324 meters
  • Duration: 6h 11m
  • Period: 2026-09-04T04:18:48+00:00 to 2026-09-04T10:30:41+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 317m, avg 324m) for 372 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 324m
Duration25/25Duration 372 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021552,
        "imo": 9422639,
        "name": "TWIST",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 316.69999999999998863131622783839702606201171875,
    "avg_distance_m": 323.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 3,
    "duration_minutes": 371.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 22313,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T04:18:48+00:00",
        "end": "2026-09-04T10:30:41+00:00"
    },
    "points_count": {
        "vessel_a": 77,
        "vessel_b": 77
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 324m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 372 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 317m, avg 324m) for 372 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 04:02 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 64 meters
  • Average Distance: 70 meters
  • Duration: 6 hours
  • Period: 2026-09-04T04:32:20+00:00 to 2026-09-04T10:32:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 70m) for 360 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 70m
Duration25/25Duration 360 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.400000000000005684341886080801486968994140625,
    "avg_distance_m": 70.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 2.5,
    "duration_minutes": 360.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 21606,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T04:32:20+00:00",
        "end": "2026-09-04T10:32:26+00:00"
    },
    "points_count": {
        "vessel_a": 49,
        "vessel_b": 49
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 360 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 70m) for 360 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 04:01 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 34m
  • Data Points: 81 AIS positions
  • Period: 2026-09-04T04:55:43+00:00 to 2026-09-04T11:29:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 394.19999999999998863131622783839702606201171875,
    "points_in_zone": 81,
    "first_point": {
        "ts": "2026-09-04T04:55:43+00:00",
        "lat": 34.70973330000000345307853422127664089202880859375,
        "lon": 33.32294999999999873807610129006206989288330078125
    },
    "last_point": {
        "ts": "2026-09-04T11:29:57+00:00",
        "lat": 34.70973330000000345307853422127664089202880859375,
        "lon": 33.3229333000000025322151486761868000030517578125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 04:01 UTC 75.0% ▼
  • Duration: 6h 34m
  • Radius: 12 meters
  • Data Points: 81 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 12.199999999999999289457264239899814128875732421875,
    "duration_minutes": 394.19999999999998863131622783839702606201171875,
    "points": 81,
    "centroid": {
        "lat": 34.70972654320987516030072583816945552825927734375,
        "lon": 33.322965018518544866310548968613147735595703125
    },
    "bbox": {
        "min_lat": 34.709616699999997990744304843246936798095703125,
        "min_lon": 33.32289999999999707824827055446803569793701171875,
        "max_lat": 34.709800000000001318767317570745944976806640625,
        "max_lon": 33.32303329999999874644345254637300968170166015625
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 03:05 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 64 meters
  • Average Distance: 70 meters
  • Duration: 6h 21m
  • Period: 2026-09-04T03:59:20+00:00 to 2026-09-04T10:20:23+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 70m) for 381 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 70m
Duration25/25Duration 381 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.400000000000005684341886080801486968994140625,
    "avg_distance_m": 70.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 2.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 381.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 22863,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T03:59:20+00:00",
        "end": "2026-09-04T10:20:23+00:00"
    },
    "points_count": {
        "vessel_a": 51,
        "vessel_b": 51
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 381 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 70m) for 381 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 03:04 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 26m
  • Data Points: 77 AIS positions
  • Period: 2026-09-04T03:55:47+00:00 to 2026-09-04T10:22:44+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 386.8999999999999772626324556767940521240234375,
    "points_in_zone": 77,
    "first_point": {
        "ts": "2026-09-04T03:55:47+00:00",
        "lat": 34.70971670000000131039996631443500518798828125,
        "lon": 33.32294999999999873807610129006206989288330078125
    },
    "last_point": {
        "ts": "2026-09-04T10:22:44+00:00",
        "lat": 34.70971670000000131039996631443500518798828125,
        "lon": 33.32298329999999708661562181077897548675537109375
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 03:04 UTC 75.0% ▼
  • Duration: 6h 26m
  • Radius: 12 meters
  • Data Points: 77 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 12.300000000000000710542735760100185871124267578125,
    "duration_minutes": 386.8999999999999772626324556767940521240234375,
    "points": 77,
    "centroid": {
        "lat": 34.70972792207792423369028256274759769439697265625,
        "lon": 33.3229660168831429700730950571596622467041015625
    },
    "bbox": {
        "min_lat": 34.709616699999997990744304843246936798095703125,
        "min_lon": 33.3229333000000025322151486761868000030517578125,
        "max_lat": 34.7097667000000029702277970500290393829345703125,
        "max_lon": 33.32303329999999874644345254637300968170166015625
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 03:03 UTC 80/100 ▼
Vessel A: IMO 9422639 (TWIST) Liberia
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 317 meters
  • Average Distance: 324 meters
  • Duration: 6h 17m
  • Period: 2026-09-04T03:51:46+00:00 to 2026-09-04T10:09:43+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 317m, avg 324m) for 378 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 324m
Duration25/25Duration 378 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021552,
        "imo": 9422639,
        "name": "TWIST",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 316.69999999999998863131622783839702606201171875,
    "avg_distance_m": 323.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 2.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 377.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 22677,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T03:51:46+00:00",
        "end": "2026-09-04T10:09:43+00:00"
    },
    "points_count": {
        "vessel_a": 81,
        "vessel_b": 81
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 324m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 378 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 317m, avg 324m) for 378 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 02:03 UTC 80/100 ▼
Vessel A: IMO 9422639 (TWIST) Liberia
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 317 meters
  • Average Distance: 324 meters
  • Duration: 6h 24m
  • Period: 2026-09-04T02:48:45+00:00 to 2026-09-04T09:12:44+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 317m, avg 324m) for 384 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 324m
Duration25/25Duration 384 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021552,
        "imo": 9422639,
        "name": "TWIST",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 317.19999999999998863131622783839702606201171875,
    "avg_distance_m": 323.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 2.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 384,
    "overlap_duration_s": 23039,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T02:48:45+00:00",
        "end": "2026-09-04T09:12:44+00:00"
    },
    "points_count": {
        "vessel_a": 82,
        "vessel_b": 82
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 324m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 384 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 317m, avg 324m) for 384 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 02:02 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 64 meters
  • Average Distance: 71 meters
  • Duration: 6h 27m
  • Period: 2026-09-04T02:47:24+00:00 to 2026-09-04T09:14:27+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 70m) for 387 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 64m, avg 70m
Duration25/25Duration 387 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 64.400000000000005684341886080801486968994140625,
    "avg_distance_m": 70.5,
    "distance_consistency_m": 3,
    "duration_minutes": 387.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23223,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T02:47:24+00:00",
        "end": "2026-09-04T09:14:27+00:00"
    },
    "points_count": {
        "vessel_a": 50,
        "vessel_b": 50
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 64m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 387 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 64m, avg 70m) for 387 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 02:01 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 78 AIS positions
  • Period: 2026-09-04T02:58:45+00:00 to 2026-09-04T09:28:46+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 78,
    "first_point": {
        "ts": "2026-09-04T02:58:45+00:00",
        "lat": 34.70971670000000131039996631443500518798828125,
        "lon": 33.32298329999999708661562181077897548675537109375
    },
    "last_point": {
        "ts": "2026-09-04T09:28:46+00:00",
        "lat": 34.7096999999999979991116560995578765869140625,
        "lon": 33.32296670000000204936441150493919849395751953125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 02:01 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 12 meters
  • Data Points: 78 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 12.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 390,
    "points": 78,
    "centroid": {
        "lat": 34.7097260692307685303603648208081722259521484375,
        "lon": 33.32296645256413825109120807610452175140380859375
    },
    "bbox": {
        "min_lat": 34.709616699999997990744304843246936798095703125,
        "min_lon": 33.32291670000000038953658076934516429901123046875,
        "max_lat": 34.7097667000000029702277970500290393829345703125,
        "max_lon": 33.32303329999999874644345254637300968170166015625
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 01:06 UTC 80/100 ▼
Vessel A: IMO 9422639 (TWIST) Liberia
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 317 meters
  • Average Distance: 324 meters
  • Duration: 6h 24m
  • Period: 2026-09-04T01:54:44+00:00 to 2026-09-04T08:18:44+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 317m, avg 324m) for 384 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 324m
Duration25/25Duration 384 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 636021552,
        "imo": 9422639,
        "name": "TWIST",
        "flag": "Liberia"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 317.19999999999998863131622783839702606201171875,
    "avg_distance_m": 323.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 2.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 384,
    "overlap_duration_s": 23040,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T01:54:44+00:00",
        "end": "2026-09-04T08:18:44+00:00"
    },
    "points_count": {
        "vessel_a": 87,
        "vessel_b": 87
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 324m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 384 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (TWIST and HORIZON ARMONIA) maintained close proximity (min 317m, avg 324m) for 384 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Sep 4, 2026 01:05 UTC 95/100 ▼
Vessel A: IMO 9976874 (NAVIG8 EXPRESS) Singapore
Vessel B: IMO 9407354 (HORIZON ARMONIA) LIBERIA
  • Minimum Distance: 65 meters
  • Average Distance: 70 meters
  • Duration: 6h 30m
  • Period: 2026-09-04T01:53:22+00:00 to 2026-09-04T08:23:25+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 65m, avg 70m) for 390 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 65m, avg 70m
Duration25/25Duration 390 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563261400,
        "imo": 9976874,
        "name": "NAVIG8 EXPRESS",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 636013938,
        "imo": 9407354,
        "name": "HORIZON ARMONIA",
        "flag": "LIBERIA"
    },
    "min_distance_m": 65.400000000000005684341886080801486968994140625,
    "avg_distance_m": 70.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 2.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 23403,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-09-04T01:53:22+00:00",
        "end": "2026-09-04T08:23:25+00:00"
    },
    "points_count": {
        "vessel_a": 57,
        "vessel_b": 57
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 65m, avg 70m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 390 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXPRESS and HORIZON ARMONIA) maintained close proximity (min 65m, avg 70m) for 390 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Sep 4, 2026 01:01 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 78 AIS positions
  • Period: 2026-09-04T01:52:43+00:00 to 2026-09-04T08:28:46+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 78,
    "first_point": {
        "ts": "2026-09-04T01:52:43+00:00",
        "lat": 34.7097499999999996589394868351519107818603515625,
        "lon": 33.32296670000000204936441150493919849395751953125
    },
    "last_point": {
        "ts": "2026-09-04T08:28:46+00:00",
        "lat": 34.7097499999999996589394868351519107818603515625,
        "lon": 33.32294999999999873807610129006206989288330078125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Sep 4, 2026 01:01 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 11 meters
  • Data Points: 78 AIS positions
  • Centroid: 34.7097, 33.3230
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 10.800000000000000710542735760100185871124267578125,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 78,
    "centroid": {
        "lat": 34.7097267102564188689939328469336032867431640625,
        "lon": 33.3229681641025905491915182210505008697509765625
    },
    "bbox": {
        "min_lat": 34.70963330000000013342287275008857250213623046875,
        "min_lon": 33.32291670000000038953658076934516429901123046875,
        "max_lat": 34.7097667000000029702277970500290393829345703125,
        "max_lon": 33.32303329999999874644345254637300968170166015625
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Sep 9 07:40 37.8583 6.5007 14.6 kn 265.0° Sierra de Huelva Monitoring Zone
Sep 9 07:39 37.8587 6.5064 14.5 kn 265.0° Sierra de Huelva Monitoring Zone
Sep 9 07:34 37.8605 6.5338 14.5 kn 264.0° Sierra de Huelva Monitoring Zone
Sep 9 07:33 37.8609 6.5387 14.5 kn 265.0° Sierra de Huelva Monitoring Zone
Sep 9 07:31 37.8612 6.5444 14.5 kn 265.0° Sierra de Huelva Monitoring Zone
Sep 9 07:30 37.8615 6.5495 14.6 kn 265.0° Sierra de Huelva Monitoring Zone
Sep 9 07:29 37.8620 6.5560 14.6 kn 265.0° Sierra de Huelva Monitoring Zone
Sep 9 07:28 37.8623 6.5617 14.6 kn 265.0° Sierra de Huelva Monitoring Zone
Sep 9 07:26 37.8630 6.5723 14.7 kn 265.0° Sierra de Huelva Monitoring Zone
Sep 9 07:25 37.8634 6.5786 14.7 kn 264.0° Sierra de Huelva Monitoring Zone
Sep 9 07:23 37.8643 6.5899 14.7 kn 264.0° Sierra de Huelva Monitoring Zone
Sep 9 07:17 37.8663 6.6176 14.7 kn 264.0° Sierra de Huelva Monitoring Zone
Sep 9 07:15 37.8671 6.6284 14.7 kn 264.0° Sierra de Huelva Monitoring Zone
Sep 9 06:06 37.8711 6.9804 14.7 kn 265.0° Central Atlantic Monitoring Zone
Sep 9 06:04 37.8716 6.9865 14.7 kn 265.0° Central Atlantic Monitoring Zone
Sep 9 05:54 37.8750 7.0392 14.6 kn 265.0° Central Atlantic Monitoring Zone
Sep 9 05:50 37.8757 7.0582 14.7 kn 267.0° Central Atlantic Monitoring Zone
Sep 9 05:49 37.8759 7.0638 14.7 kn 267.0° Central Atlantic Monitoring Zone
Sep 9 05:46 37.8765 7.0789 14.7 kn 267.0° Central Atlantic Monitoring Zone
Sep 9 05:45 37.8769 7.0871 14.7 kn 266.0° Central Atlantic Monitoring Zone

Showing 20 of 100 recent positions.

Data Source

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

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