AKRISIOS

IMO 9953456

Vessel information

Vessel Name AKRISIOS
IMO Number 9953456
MMSI 538012909
Vessel Type Tanker
Flag 🇲🇭 MARSHALL ISLANDS
Call Sign V7B3480
Length 183 m
Beam 32 m

Detected Events (100)

Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 19, 2026 05:02 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 1h 15m
  • Data Points: 6 AIS positions
  • Period: 2026-08-19T05:02:25+00:00 to 2026-08-19T06:17:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 75,
    "points_in_zone": 6,
    "first_point": {
        "ts": "2026-08-19T05:02:25+00:00",
        "lat": 34.70804170000000254958649748004972934722900390625,
        "lon": 33.31994670000000269283191300928592681884765625
    },
    "last_point": {
        "ts": "2026-08-19T06:17:27+00:00",
        "lat": 34.70811330000000083373379311524331569671630859375,
        "lon": 33.31991500000000172576619661413133144378662109375
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 19, 2026 04:20 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 1h 57m
  • Data Points: 11 AIS positions
  • Period: 2026-08-19T04:20:26+00:00 to 2026-08-19T06:17:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 117,
    "points_in_zone": 11,
    "first_point": {
        "ts": "2026-08-19T04:20:26+00:00",
        "lat": 34.7081366999999971767465467564761638641357421875,
        "lon": 33.319923299999999244391801767051219940185546875
    },
    "last_point": {
        "ts": "2026-08-19T06:17:27+00:00",
        "lat": 34.70811330000000083373379311524331569671630859375,
        "lon": 33.31991500000000172576619661413133144378662109375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 19, 2026 04:20 UTC 75.0% ▼
  • Duration: 1h 57m
  • Radius: 8 meters
  • Data Points: 11 AIS positions
  • Centroid: 34.7081, 33.3199
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 7.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 117,
    "points": 11,
    "centroid": {
        "lat": 34.70806621818181980643203132785856723785400390625,
        "lon": 33.3199375818181806607753969728946685791015625
    },
    "bbox": {
        "min_lat": 34.7080083000000030324372346512973308563232421875,
        "min_lon": 33.31989329999999682740963180549442768096923828125,
        "max_lat": 34.7081366999999971767465467564761638641357421875,
        "max_lon": 33.3199800000000010413714335300028324127197265625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 19, 2026 03:14 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 3h 3m
  • Data Points: 17 AIS positions
  • Period: 2026-08-19T03:14:26+00:00 to 2026-08-19T06:17:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 183,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-08-19T03:14:26+00:00",
        "lat": 34.70811499999999938381733954884111881256103515625,
        "lon": 33.31994670000000269283191300928592681884765625
    },
    "last_point": {
        "ts": "2026-08-19T06:17:27+00:00",
        "lat": 34.70811330000000083373379311524331569671630859375,
        "lon": 33.31991500000000172576619661413133144378662109375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 19, 2026 03:14 UTC 75.0% ▼
  • Duration: 3h 3m
  • Radius: 10 meters
  • Data Points: 17 AIS positions
  • Centroid: 34.7081, 33.3199
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 9.699999999999999289457264239899814128875732421875,
    "duration_minutes": 183,
    "points": 17,
    "centroid": {
        "lat": 34.70808637647058958464185707271099090576171875,
        "lon": 33.319940394117651294436655007302761077880859375
    },
    "bbox": {
        "min_lat": 34.7080083000000030324372346512973308563232421875,
        "min_lon": 33.31989329999999682740963180549442768096923828125,
        "max_lat": 34.708138300000001663647708483040332794189453125,
        "max_lon": 33.3199800000000010413714335300028324127197265625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 19, 2026 02:11 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 4h 6m
  • Data Points: 22 AIS positions
  • Period: 2026-08-19T02:11:26+00:00 to 2026-08-19T06:17:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 246,
    "points_in_zone": 22,
    "first_point": {
        "ts": "2026-08-19T02:11:26+00:00",
        "lat": 34.70806999999999931105776340700685977935791015625,
        "lon": 33.3199249999999977944753482006490230560302734375
    },
    "last_point": {
        "ts": "2026-08-19T06:17:27+00:00",
        "lat": 34.70811330000000083373379311524331569671630859375,
        "lon": 33.31991500000000172576619661413133144378662109375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 19, 2026 02:11 UTC 75.0% ▼
  • Duration: 4h 6m
  • Radius: 10 meters
  • Data Points: 22 AIS positions
  • Centroid: 34.7081, 33.3199
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 9.800000000000000710542735760100185871124267578125,
    "duration_minutes": 246,
    "points": 22,
    "centroid": {
        "lat": 34.708086972727272723204805515706539154052734375,
        "lon": 33.31994189999999633755578543059527873992919921875
    },
    "bbox": {
        "min_lat": 34.7080083000000030324372346512973308563232421875,
        "min_lon": 33.31989329999999682740963180549442768096923828125,
        "max_lat": 34.708138300000001663647708483040332794189453125,
        "max_lon": 33.3199800000000010413714335300028324127197265625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 19, 2026 01:38 UTC 75/100 ▼
Vessel A: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 321 meters
  • Average Distance: 323 meters
  • Duration: 1h 39m
  • Period: 2026-08-19T01:38:18+00:00 to 2026-08-19T03:17:17+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 321m, avg 323m) for 99 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 321m, avg 323m
Duration20/25Duration 99 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-19T03:45:04.169412+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 320.80000000000001136868377216160297393798828125,
    "avg_distance_m": 323,
    "distance_consistency_m": 3.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 99,
    "overlap_duration_s": 5939,
    "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": "2026-08-19T01:38:18+00:00",
        "end": "2026-08-19T03:17:17+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 321m, avg 323m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 99 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 321m, avg 323m) for 99 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70912460000000265836206381209194660186767578125,
            "lon": 33.321179999999998244675225578248500823974609375
        },
        "time_window": {
            "start_ts": "2026-08-19T01:38:18+00:00",
            "end_ts": "2026-08-19T03:17:17+00:00"
        },
        "searched_at": "2026-08-19T03:45:04.169412+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 19, 2026 01:08 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 5h 9m
  • Data Points: 29 AIS positions
  • Period: 2026-08-19T01:08:27+00:00 to 2026-08-19T06:17:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 309,
    "points_in_zone": 29,
    "first_point": {
        "ts": "2026-08-19T01:08:27+00:00",
        "lat": 34.70809669999999869105522520840167999267578125,
        "lon": 33.31992670000000344998625223524868488311767578125
    },
    "last_point": {
        "ts": "2026-08-19T06:17:27+00:00",
        "lat": 34.70811330000000083373379311524331569671630859375,
        "lon": 33.31991500000000172576619661413133144378662109375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 19, 2026 01:08 UTC 75.0% ▼
  • Duration: 5h 9m
  • Radius: 10 meters
  • Data Points: 29 AIS positions
  • Centroid: 34.7081, 33.3199
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 9.699999999999999289457264239899814128875732421875,
    "duration_minutes": 309,
    "points": 29,
    "centroid": {
        "lat": 34.70808626551723818920436315238475799560546875,
        "lon": 33.31994005862069485601750784553587436676025390625
    },
    "bbox": {
        "min_lat": 34.7080083000000030324372346512973308563232421875,
        "min_lon": 33.31989329999999682740963180549442768096923828125,
        "max_lat": 34.708138300000001663647708483040332794189453125,
        "max_lon": 33.3199800000000010413714335300028324127197265625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 19, 2026 00:14 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 3m
  • Data Points: 35 AIS positions
  • Period: 2026-08-19T00:14:23+00:00 to 2026-08-19T06:17:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 363.1000000000000227373675443232059478759765625,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-08-19T00:14:23+00:00",
        "lat": 34.708106700000001865191734395921230316162109375,
        "lon": 33.3199766999999980043867253698408603668212890625
    },
    "last_point": {
        "ts": "2026-08-19T06:17:27+00:00",
        "lat": 34.70811330000000083373379311524331569671630859375,
        "lon": 33.31991500000000172576619661413133144378662109375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 19, 2026 00:14 UTC 75.0% ▼
  • Duration: 6h 3m
  • Radius: 10 meters
  • Data Points: 35 AIS positions
  • Centroid: 34.7081, 33.3199
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 10.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 363.1000000000000227373675443232059478759765625,
    "points": 35,
    "centroid": {
        "lat": 34.7080901942857025233024614863097667694091796875,
        "lon": 33.319941860000000133368303067982196807861328125
    },
    "bbox": {
        "min_lat": 34.7080083000000030324372346512973308563232421875,
        "min_lon": 33.31989329999999682740963180549442768096923828125,
        "max_lat": 34.708138300000001663647708483040332794189453125,
        "max_lon": 33.3199800000000010413714335300028324127197265625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 23:02 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 36 AIS positions
  • Period: 2026-08-18T23:44:27+00:00 to 2026-08-19T06:17:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-08-18T23:44:27+00:00",
        "lat": 34.70811830000000242080204770900309085845947265625,
        "lon": 33.3199733000000009042196325026452541351318359375
    },
    "last_point": {
        "ts": "2026-08-19T06:17:27+00:00",
        "lat": 34.70811330000000083373379311524331569671630859375,
        "lon": 33.31991500000000172576619661413133144378662109375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 23:02 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 10 meters
  • Data Points: 36 AIS positions
  • Centroid: 34.7081, 33.3199
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 10.199999999999999289457264239899814128875732421875,
    "duration_minutes": 393,
    "points": 36,
    "centroid": {
        "lat": 34.70809097499998330249582068063318729400634765625,
        "lon": 33.31994273333333467235206626355648040771484375
    },
    "bbox": {
        "min_lat": 34.7080083000000030324372346512973308563232421875,
        "min_lon": 33.31989329999999682740963180549442768096923828125,
        "max_lat": 34.708138300000001663647708483040332794189453125,
        "max_lon": 33.3199800000000010413714335300028324127197265625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 22:02 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 39 AIS positions
  • Period: 2026-08-18T22:53:27+00:00 to 2026-08-19T05:26:30+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 393.1000000000000227373675443232059478759765625,
    "points_in_zone": 39,
    "first_point": {
        "ts": "2026-08-18T22:53:27+00:00",
        "lat": 34.70806830000000076097421697340905666351318359375,
        "lon": 33.31996500000000338559402734972536563873291015625
    },
    "last_point": {
        "ts": "2026-08-19T05:26:30+00:00",
        "lat": 34.708093300000001590888132341206073760986328125,
        "lon": 33.31996170000000034860931918956339359283447265625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 22:02 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 10 meters
  • Data Points: 39 AIS positions
  • Centroid: 34.7081, 33.3199
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 10.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 393.1000000000000227373675443232059478759765625,
    "points": 39,
    "centroid": {
        "lat": 34.7080885487179529036438907496631145477294921875,
        "lon": 33.31994542820513061087694950401782989501953125
    },
    "bbox": {
        "min_lat": 34.7080083000000030324372346512973308563232421875,
        "min_lon": 33.31989329999999682740963180549442768096923828125,
        "max_lat": 34.708138300000001663647708483040332794189453125,
        "max_lon": 33.3199766999999980043867253698408603668212890625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 21:29 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 34 AIS positions
  • Period: 2026-08-18T21:56:26+00:00 to 2026-08-19T04:20:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 384,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-08-18T21:56:26+00:00",
        "lat": 34.7081433000000032507159630768001079559326171875,
        "lon": 33.31994499999999703732100897468626499176025390625
    },
    "last_point": {
        "ts": "2026-08-19T04:20:26+00:00",
        "lat": 34.7081366999999971767465467564761638641357421875,
        "lon": 33.319923299999999244391801767051219940185546875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 21:29 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 5 meters
  • Data Points: 34 AIS positions
  • Centroid: 34.7081, 33.3199
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 384,
    "points": 34,
    "centroid": {
        "lat": 34.70810009705883203423582017421722412109375,
        "lon": 33.31994730294118056690422235988080501556396484375
    },
    "bbox": {
        "min_lat": 34.70805829999999758683770778588950634002685546875,
        "min_lon": 33.31991330000000317568265018053352832794189453125,
        "max_lat": 34.7081433000000032507159630768001079559326171875,
        "max_lon": 33.3199766999999980043867253698408603668212890625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 20:11 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 30 AIS positions
  • Period: 2026-08-18T20:20:19+00:00 to 2026-08-19T02:56:26+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-08-18T20:20:19+00:00",
        "lat": 34.7080567000000002053639036603271961212158203125,
        "lon": 33.31995169999999717447281000204384326934814453125
    },
    "last_point": {
        "ts": "2026-08-19T02:56:26+00:00",
        "lat": 34.70811499999999938381733954884111881256103515625,
        "lon": 33.31995169999999717447281000204384326934814453125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 20:11 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 6 meters
  • Data Points: 30 AIS positions
  • Centroid: 34.7081, 33.3199
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 30,
    "centroid": {
        "lat": 34.7080931100000071864997153170406818389892578125,
        "lon": 33.31994905666666539900688803754746913909912109375
    },
    "bbox": {
        "min_lat": 34.7080567000000002053639036603271961212158203125,
        "min_lon": 33.31991330000000317568265018053352832794189453125,
        "max_lat": 34.7081433000000032507159630768001079559326171875,
        "max_lon": 33.3199766999999980043867253698408603668212890625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 19:02 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 31 AIS positions
  • Period: 2026-08-18T19:41:26+00:00 to 2026-08-19T02:14:28+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-08-18T19:41:26+00:00",
        "lat": 34.70808000000000248519427259452641010284423828125,
        "lon": 33.31995330000000166137397172860801219940185546875
    },
    "last_point": {
        "ts": "2026-08-19T02:14:28+00:00",
        "lat": 34.7080600000000032423486118204891681671142578125,
        "lon": 33.319936699999999518695403821766376495361328125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 19:02 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 6 meters
  • Data Points: 31 AIS positions
  • Centroid: 34.7081, 33.3199
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 6.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 393,
    "points": 31,
    "centroid": {
        "lat": 34.7080877935483869123345357365906238555908203125,
        "lon": 33.3199473645161248214208171702921390533447265625
    },
    "bbox": {
        "min_lat": 34.70803500000000241243469645269215106964111328125,
        "min_lon": 33.31991330000000317568265018053352832794189453125,
        "max_lat": 34.7081433000000032507159630768001079559326171875,
        "max_lon": 33.3199766999999980043867253698408603668212890625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 18:32 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 30 AIS positions
  • Period: 2026-08-18T18:56:25+00:00 to 2026-08-19T01:29:23+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-08-18T18:56:25+00:00",
        "lat": 34.708134999999998626663000322878360748291015625,
        "lon": 33.3199283000000008314600563608109951019287109375
    },
    "last_point": {
        "ts": "2026-08-19T01:29:23+00:00",
        "lat": 34.708061700000001792432158254086971282958984375,
        "lon": 33.31991500000000172576619661413133144378662109375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 18:32 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 7 meters
  • Data Points: 30 AIS positions
  • Centroid: 34.7081, 33.3199
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 6.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 393,
    "points": 30,
    "centroid": {
        "lat": 34.7080952200000041329985833726823329925537109375,
        "lon": 33.31994905666666539900688803754746913909912109375
    },
    "bbox": {
        "min_lat": 34.70803500000000241243469645269215106964111328125,
        "min_lon": 33.31991330000000317568265018053352832794189453125,
        "max_lat": 34.7081433000000032507159630768001079559326171875,
        "max_lon": 33.319985000000002628439688123762607574462890625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 17:05 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 27 AIS positions
  • Period: 2026-08-18T17:11:23+00:00 to 2026-08-18T23:44:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 393.1000000000000227373675443232059478759765625,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-08-18T17:11:23+00:00",
        "lat": 34.7080782999999968296833685599267482757568359375,
        "lon": 33.319933300000002418528310954570770263671875
    },
    "last_point": {
        "ts": "2026-08-18T23:44:27+00:00",
        "lat": 34.70811830000000242080204770900309085845947265625,
        "lon": 33.3199733000000009042196325026452541351318359375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 17:05 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 7 meters
  • Data Points: 27 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 6.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 393.1000000000000227373675443232059478759765625,
    "points": 27,
    "centroid": {
        "lat": 34.70809234444444513201233348809182643890380859375,
        "lon": 33.319951233333341633624513633549213409423828125
    },
    "bbox": {
        "min_lat": 34.70803500000000241243469645269215106964111328125,
        "min_lon": 33.31991670000000027584974304772913455963134765625,
        "max_lat": 34.7081433000000032507159630768001079559326171875,
        "max_lon": 33.319985000000002628439688123762607574462890625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 18, 2026 16:19 UTC 80/100 ▼
Vessel A: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 317 meters
  • Average Distance: 322 meters
  • Duration: 4h 24m
  • Period: 2026-08-18T16:19:23+00:00 to 2026-08-18T20:44:14+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 317m, avg 322m) for 265 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 322m
Duration25/25Duration 265 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-18T22:00:21.070019+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 316.80000000000001136868377216160297393798828125,
    "avg_distance_m": 321.5,
    "distance_consistency_m": 3.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 264.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 15891,
    "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": "2026-08-18T16:19:23+00:00",
        "end": "2026-08-18T20:44:14+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 322m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 265 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 317m, avg 322m) for 265 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70914570000000054506017477251589298248291015625,
            "lon": 33.3211814000000003943569026887416839599609375
        },
        "time_window": {
            "start_ts": "2026-08-18T16:19:23+00:00",
            "end_ts": "2026-08-18T20:44:14+00:00"
        },
        "searched_at": "2026-08-18T22:00:21.070019+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 16:06 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 39m
  • Data Points: 31 AIS positions
  • Period: 2026-08-18T16:50:03+00:00 to 2026-08-18T23:29:27+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 399.3999999999999772626324556767940521240234375,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-08-18T16:50:03+00:00",
        "lat": 34.70807330000000234804247156716883182525634765625,
        "lon": 33.32019170000000229947545449249446392059326171875
    },
    "last_point": {
        "ts": "2026-08-18T23:29:27+00:00",
        "lat": 34.70808000000000248519427259452641010284423828125,
        "lon": 33.31995669999999876154106459580361843109130859375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 16:06 UTC 75.0% ▼
  • Duration: 6h 39m
  • Radius: 22 meters
  • Data Points: 31 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 21.699999999999999289457264239899814128875732421875,
    "duration_minutes": 399.3999999999999772626324556767940521240234375,
    "points": 31,
    "centroid": {
        "lat": 34.70808548387096692522391094826161861419677734375,
        "lon": 33.31995478387097620043277856893837451934814453125
    },
    "bbox": {
        "min_lat": 34.70800669999999854553607292473316192626953125,
        "min_lon": 33.31989999999999696456143283285200595855712890625,
        "max_lat": 34.7081433000000032507159630768001079559326171875,
        "max_lon": 33.32019170000000229947545449249446392059326171875
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 18, 2026 15:22 UTC 80/100 ▼
Vessel A: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 317 meters
  • Average Distance: 321 meters
  • Duration: 4h 42m
  • Period: 2026-08-18T15:22:20+00:00 to 2026-08-18T20:05:15+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 317m, avg 321m) for 283 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 321m
Duration25/25Duration 283 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 316.80000000000001136868377216160297393798828125,
    "avg_distance_m": 321.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 282.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 16975,
    "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": "2026-08-18T15:22:20+00:00",
        "end": "2026-08-18T20:05:15+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 321m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 283 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 317m, avg 321m) for 283 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 15:00 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 16m
  • Data Points: 34 AIS positions
  • Period: 2026-08-18T15:45:59+00:00 to 2026-08-18T22:02:23+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 376.3999999999999772626324556767940521240234375,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-08-18T15:45:59+00:00",
        "lat": 34.7081400000000002137312549166381359100341796875,
        "lon": 33.31995330000000166137397172860801219940185546875
    },
    "last_point": {
        "ts": "2026-08-18T22:02:23+00:00",
        "lat": 34.7081017000000002781234798021614551544189453125,
        "lon": 33.31992670000000344998625223524868488311767578125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 15:00 UTC 75.0% ▼
  • Duration: 6h 16m
  • Radius: 107 meters
  • Data Points: 34 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 107.2000000000000028421709430404007434844970703125,
    "duration_minutes": 376.3999999999999772626324556767940521240234375,
    "points": 34,
    "centroid": {
        "lat": 34.70813210882352706221354310400784015655517578125,
        "lon": 33.31997881764706193052916205488145351409912109375
    },
    "bbox": {
        "min_lat": 34.70800669999999854553607292473316192626953125,
        "min_lon": 33.31989999999999696456143283285200595855712890625,
        "max_lat": 34.70896330000000062909748521633446216583251953125,
        "max_lon": 33.32057499999999805595507496036589145660400390625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 14:00 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 37m
  • Data Points: 36 AIS positions
  • Period: 2026-08-18T14:51:53+00:00 to 2026-08-18T21:29:24+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 397.5,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-08-18T14:51:53+00:00",
        "lat": 34.7080832999999984167516231536865234375,
        "lon": 33.31996170000000034860931918956339359283447265625
    },
    "last_point": {
        "ts": "2026-08-18T21:29:24+00:00",
        "lat": 34.70812000000000097088559414260089397430419921875,
        "lon": 33.31995330000000166137397172860801219940185546875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 14:00 UTC 75.0% ▼
  • Duration: 6h 37m
  • Radius: 108 meters
  • Data Points: 36 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 107.5,
    "duration_minutes": 397.5,
    "points": 36,
    "centroid": {
        "lat": 34.70812851944445043272935436107218265533447265625,
        "lon": 33.31997860555555490691403974778950214385986328125
    },
    "bbox": {
        "min_lat": 34.70800669999999854553607292473316192626953125,
        "min_lon": 33.31989999999999696456143283285200595855712890625,
        "max_lat": 34.70896330000000062909748521633446216583251953125,
        "max_lon": 33.32057499999999805595507496036589145660400390625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 13:12 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 25m
  • Data Points: 38 AIS positions
  • Period: 2026-08-18T13:54:58+00:00 to 2026-08-18T20:20:19+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 385.3999999999999772626324556767940521240234375,
    "points_in_zone": 38,
    "first_point": {
        "ts": "2026-08-18T13:54:58+00:00",
        "lat": 34.7080849999999969668351695872843265533447265625,
        "lon": 33.31992670000000344998625223524868488311767578125
    },
    "last_point": {
        "ts": "2026-08-18T20:20:19+00:00",
        "lat": 34.7080567000000002053639036603271961212158203125,
        "lon": 33.31995169999999717447281000204384326934814453125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 13:12 UTC 75.0% ▼
  • Duration: 6h 25m
  • Radius: 108 meters
  • Data Points: 38 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 108,
    "duration_minutes": 385.3999999999999772626324556767940521240234375,
    "points": 38,
    "centroid": {
        "lat": 34.70812460526317266840123920701444149017333984375,
        "lon": 33.31997639999999449855749844573438167572021484375
    },
    "bbox": {
        "min_lat": 34.70800669999999854553607292473316192626953125,
        "min_lon": 33.31989999999999696456143283285200595855712890625,
        "max_lat": 34.70896330000000062909748521633446216583251953125,
        "max_lon": 33.32057499999999805595507496036589145660400390625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 18, 2026 12:43 UTC 75/100 ▼
Vessel A: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 318 meters
  • Average Distance: 322 meters
  • Duration: 1h 33m
  • Period: 2026-08-18T12:43:20+00:00 to 2026-08-18T14:16:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 318m, avg 322m) for 93 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 318m, avg 322m
Duration20/25Duration 93 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-18T18:30:04.072820+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 317.80000000000001136868377216160297393798828125,
    "avg_distance_m": 321.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 3.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 93.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 5586,
    "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": "2026-08-18T12:43:20+00:00",
        "end": "2026-08-18T14:16:26+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 318m, avg 322m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 93 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 318m, avg 322m) for 93 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70913110000000045829438022337853908538818359375,
            "lon": 33.3211778000000009569703252054750919342041015625
        },
        "time_window": {
            "start_ts": "2026-08-18T12:43:20+00:00",
            "end_ts": "2026-08-18T14:16:26+00:00"
        },
        "searched_at": "2026-08-18T18:30:04.072820+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 12:33 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 34m
  • Data Points: 38 AIS positions
  • Period: 2026-08-18T12:51:54+00:00 to 2026-08-18T19:26:21+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 394.3999999999999772626324556767940521240234375,
    "points_in_zone": 38,
    "first_point": {
        "ts": "2026-08-18T12:51:54+00:00",
        "lat": 34.708138300000001663647708483040332794189453125,
        "lon": 33.31996000000000179852577275596559047698974609375
    },
    "last_point": {
        "ts": "2026-08-18T19:26:21+00:00",
        "lat": 34.70810329999999765959728392772376537322998046875,
        "lon": 33.319985000000002628439688123762607574462890625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 12:33 UTC 75.0% ▼
  • Duration: 6h 34m
  • Radius: 108 meters
  • Data Points: 38 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 107.5,
    "duration_minutes": 394.3999999999999772626324556767940521240234375,
    "points": 38,
    "centroid": {
        "lat": 34.708129907894743837459827773272991180419921875,
        "lon": 33.31997688157894543792281183414161205291748046875
    },
    "bbox": {
        "min_lat": 34.70800669999999854553607292473316192626953125,
        "min_lon": 33.31989999999999696456143283285200595855712890625,
        "max_lat": 34.70896330000000062909748521633446216583251953125,
        "max_lon": 33.32057499999999805595507496036589145660400390625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 11:36 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 5h 49m
  • Data Points: 37 AIS positions
  • Period: 2026-08-18T11:36:55+00:00 to 2026-08-18T17:26:18+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 349.3999999999999772626324556767940521240234375,
    "points_in_zone": 37,
    "first_point": {
        "ts": "2026-08-18T11:36:55+00:00",
        "lat": 34.708089999999998553903424181044101715087890625,
        "lon": 33.31994499999999703732100897468626499176025390625
    },
    "last_point": {
        "ts": "2026-08-18T17:26:18+00:00",
        "lat": 34.70807169999999786114130984060466289520263671875,
        "lon": 33.31995169999999717447281000204384326934814453125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 11:36 UTC 75.0% ▼
  • Duration: 5h 49m
  • Radius: 108 meters
  • Data Points: 37 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 107.599999999999994315658113919198513031005859375,
    "duration_minutes": 349.3999999999999772626324556767940521240234375,
    "points": 37,
    "centroid": {
        "lat": 34.7081267513513438416339340619742870330810546875,
        "lon": 33.31998004054054263178841210901737213134765625
    },
    "bbox": {
        "min_lat": 34.70800669999999854553607292473316192626953125,
        "min_lon": 33.31989999999999696456143283285200595855712890625,
        "max_lat": 34.70896330000000062909748521633446216583251953125,
        "max_lon": 33.32057499999999805595507496036589145660400390625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 18, 2026 11:07 UTC 80/100 ▼
Vessel A: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 318 meters
  • Average Distance: 322 meters
  • Duration: 3h 9m
  • Period: 2026-08-18T11:07:25+00:00 to 2026-08-18T14:16:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 318m, avg 322m) for 189 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 318m, avg 322m
Duration25/25Duration 189 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-18T17:45:01.542728+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 317.80000000000001136868377216160297393798828125,
    "avg_distance_m": 321.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 2.5,
    "duration_minutes": 189,
    "overlap_duration_s": 11341,
    "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": "2026-08-18T11:07:25+00:00",
        "end": "2026-08-18T14:16:26+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 318m, avg 322m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 189 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 318m, avg 322m) for 189 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70913469999999989568095770664513111114501953125,
            "lon": 33.32117759999999861975084058940410614013671875
        },
        "time_window": {
            "start_ts": "2026-08-18T11:07:25+00:00",
            "end_ts": "2026-08-18T14:16:26+00:00"
        },
        "searched_at": "2026-08-18T17:45:01.542728+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 18, 2026 10:03 UTC 80/100 ▼
Vessel A: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 318 meters
  • Average Distance: 322 meters
  • Duration: 4h 12m
  • Period: 2026-08-18T10:04:25+00:00 to 2026-08-18T14:16:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 318m, avg 322m) for 252 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 318m, avg 322m
Duration25/25Duration 252 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-18T16:15:04.702257+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 317.80000000000001136868377216160297393798828125,
    "avg_distance_m": 321.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 2.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 252,
    "overlap_duration_s": 15121,
    "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": "2026-08-18T10:04:25+00:00",
        "end": "2026-08-18T14:16:26+00:00"
    },
    "points_count": {
        "vessel_a": 14,
        "vessel_b": 14
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 318m, avg 322m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 252 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 318m, avg 322m) for 252 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70914119999999769561327411793172359466552734375,
            "lon": 33.321175699999997732447809539735317230224609375
        },
        "time_window": {
            "start_ts": "2026-08-18T10:03:53+00:00",
            "end_ts": "2026-08-18T14:16:26+00:00"
        },
        "searched_at": "2026-08-18T16:15:04.702257+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 10:03 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 28m
  • Data Points: 38 AIS positions
  • Period: 2026-08-18T10:57:54+00:00 to 2026-08-18T17:26:18+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 388.3999999999999772626324556767940521240234375,
    "points_in_zone": 38,
    "first_point": {
        "ts": "2026-08-18T10:57:54+00:00",
        "lat": 34.708089999999998553903424181044101715087890625,
        "lon": 33.31994999999999862438926356844604015350341796875
    },
    "last_point": {
        "ts": "2026-08-18T17:26:18+00:00",
        "lat": 34.70807169999999786114130984060466289520263671875,
        "lon": 33.31995169999999717447281000204384326934814453125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 10:03 UTC 75.0% ▼
  • Duration: 6h 28m
  • Radius: 108 meters
  • Data Points: 38 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 107.7999999999999971578290569595992565155029296875,
    "duration_minutes": 388.3999999999999772626324556767940521240234375,
    "points": 38,
    "centroid": {
        "lat": 34.70812578421051597388213849626481533050537109375,
        "lon": 33.31997924999999582951204502023756504058837890625
    },
    "bbox": {
        "min_lat": 34.70800669999999854553607292473316192626953125,
        "min_lon": 33.31989999999999696456143283285200595855712890625,
        "max_lat": 34.70896330000000062909748521633446216583251953125,
        "max_lon": 33.32057499999999805595507496036589145660400390625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 18, 2026 09:21 UTC 80/100 ▼
Vessel A: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 318 meters
  • Average Distance: 322 meters
  • Duration: 4h 21m
  • Period: 2026-08-18T09:55:23+00:00 to 2026-08-18T14:16:26+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 318m, avg 322m) for 261 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 318m, avg 322m
Duration25/25Duration 261 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 317.80000000000001136868377216160297393798828125,
    "avg_distance_m": 322,
    "distance_consistency_m": 2.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 261.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 15663,
    "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": "2026-08-18T09:55:23+00:00",
        "end": "2026-08-18T14:16:26+00:00"
    },
    "points_count": {
        "vessel_a": 15,
        "vessel_b": 15
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 318m, avg 322m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 261 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 318m, avg 322m) for 261 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 09:21 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 30 AIS positions
  • Period: 2026-08-18T09:21:51+00:00 to 2026-08-18T15:57:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-08-18T09:21:51+00:00",
        "lat": 34.70811330000000083373379311524331569671630859375,
        "lon": 33.3199632999999977300831233151257038116455078125
    },
    "last_point": {
        "ts": "2026-08-18T15:57:57+00:00",
        "lat": 34.708128299999998489511199295520782470703125,
        "lon": 33.31998829999999855999703868292272090911865234375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 09:21 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 4 meters
  • Data Points: 30 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 30,
    "centroid": {
        "lat": 34.70810215666666209699542378075420856475830078125,
        "lon": 33.31995499666665949689559056423604488372802734375
    },
    "bbox": {
        "min_lat": 34.70807330000000234804247156716883182525634765625,
        "min_lon": 33.31992670000000344998625223524868488311767578125,
        "max_lat": 34.7081400000000002137312549166381359100341796875,
        "max_lon": 33.31998829999999855999703868292272090911865234375
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 08:09 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 27 AIS positions
  • Period: 2026-08-18T08:39:47+00:00 to 2026-08-18T15:09:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 390.19999999999998863131622783839702606201171875,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-08-18T08:39:47+00:00",
        "lat": 34.70809669999999869105522520840167999267578125,
        "lon": 33.31996500000000338559402734972536563873291015625
    },
    "last_point": {
        "ts": "2026-08-18T15:09:57+00:00",
        "lat": 34.7081017000000002781234798021614551544189453125,
        "lon": 33.31995169999999717447281000204384326934814453125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 08:09 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 4 meters
  • Data Points: 27 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 390.19999999999998863131622783839702606201171875,
    "points": 27,
    "centroid": {
        "lat": 34.70809900370370115751939010806381702423095703125,
        "lon": 33.31995321111111252321279607713222503662109375
    },
    "bbox": {
        "min_lat": 34.70807330000000234804247156716883182525634765625,
        "min_lon": 33.31992670000000344998625223524868488311767578125,
        "max_lat": 34.708138300000001663647708483040332794189453125,
        "max_lon": 33.31996670000000193567757378332316875457763671875
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 18, 2026 07:18 UTC 70/100 ▼
Vessel A: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
Vessel B: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
  • Minimum Distance: 320 meters
  • Average Distance: 322 meters
  • Duration: 1h 6m
  • Period: 2026-08-18T07:18:51+00:00 to 2026-08-18T08:24:52+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (AKRISIOS and VELOS AQUARIUS) maintained close proximity (min 320m, avg 322m) for 66 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 320m, avg 322m
Duration15/25Duration 66 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 319.6000000000000227373675443232059478759765625,
    "avg_distance_m": 321.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 3.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 66,
    "overlap_duration_s": 3961,
    "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": "2026-08-18T07:18:51+00:00",
        "end": "2026-08-18T08:24:52+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 320m, avg 322m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 66 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AKRISIOS and VELOS AQUARIUS) maintained close proximity (min 320m, avg 322m) for 66 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 07:15 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 21m
  • Data Points: 27 AIS positions
  • Period: 2026-08-18T07:54:56+00:00 to 2026-08-18T14:15:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 381.1000000000000227373675443232059478759765625,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-08-18T07:54:56+00:00",
        "lat": 34.70805829999999758683770778588950634002685546875,
        "lon": 33.31994329999999848723746254108846187591552734375
    },
    "last_point": {
        "ts": "2026-08-18T14:15:59+00:00",
        "lat": 34.7080832999999984167516231536865234375,
        "lon": 33.31994999999999862438926356844604015350341796875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 07:15 UTC 75.0% ▼
  • Duration: 6h 21m
  • Radius: 5 meters
  • Data Points: 27 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 4.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 381.1000000000000227373675443232059478759765625,
    "points": 27,
    "centroid": {
        "lat": 34.70809912592591928159890812821686267852783203125,
        "lon": 33.319954566666666551100206561386585235595703125
    },
    "bbox": {
        "min_lat": 34.70805829999999758683770778588950634002685546875,
        "min_lon": 33.31992670000000344998625223524868488311767578125,
        "max_lat": 34.708138300000001663647708483040332794189453125,
        "max_lon": 33.3199749999999994543031789362430572509765625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 06:39 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 27 AIS positions
  • Period: 2026-08-18T06:51:52+00:00 to 2026-08-18T13:27:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-08-18T06:51:52+00:00",
        "lat": 34.708138300000001663647708483040332794189453125,
        "lon": 33.31995830000000324844222632236778736114501953125
    },
    "last_point": {
        "ts": "2026-08-18T13:27:57+00:00",
        "lat": 34.70807500000000089812601800076663494110107421875,
        "lon": 33.319936699999999518695403821766376495361328125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 06:39 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 9 meters
  • Data Points: 27 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8.800000000000000710542735760100185871124267578125,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 27,
    "centroid": {
        "lat": 34.70809931111110557822030386887490749359130859375,
        "lon": 33.31995345555555587679918971844017505645751953125
    },
    "bbox": {
        "min_lat": 34.70802330000000068821464083157479763031005859375,
        "min_lon": 33.319923299999999244391801767051219940185546875,
        "max_lat": 34.70814829999999773235686006955802440643310546875,
        "max_lon": 33.3199749999999994543031789362430572509765625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 05:09 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 25 AIS positions
  • Period: 2026-08-18T05:09:52+00:00 to 2026-08-18T11:39:54+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-08-18T05:09:52+00:00",
        "lat": 34.708048300000001518128556199371814727783203125,
        "lon": 33.31994499999999703732100897468626499176025390625
    },
    "last_point": {
        "ts": "2026-08-18T11:39:54+00:00",
        "lat": 34.70809669999999869105522520840167999267578125,
        "lon": 33.31995830000000324844222632236778736114501953125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 05:09 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 9 meters
  • Data Points: 25 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8.5,
    "duration_minutes": 390,
    "points": 25,
    "centroid": {
        "lat": 34.70809605999999547520928899757564067840576171875,
        "lon": 33.3199543280000085587744251824915409088134765625
    },
    "bbox": {
        "min_lat": 34.70802330000000068821464083157479763031005859375,
        "min_lon": 33.319923299999999244391801767051219940185546875,
        "max_lat": 34.70814829999999773235686006955802440643310546875,
        "max_lon": 33.3199749999999994543031789362430572509765625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 18, 2026 04:18 UTC 65/100 ▼
Vessel A: IMO 9517288 (ALFA SEA) Panama
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 362 meters
  • Average Distance: 362 meters
  • Duration: 54 minutes
  • Period: 2026-08-18T04:18:30+00:00 to 2026-08-18T05:12:32+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 362m, avg 362m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 362m, avg 362m
Duration10/25Duration 54 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-18T10:00:08.129535+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 361.69999999999998863131622783839702606201171875,
    "avg_distance_m": 362.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 0.90000000000000002220446049250313080847263336181640625,
    "duration_minutes": 54,
    "overlap_duration_s": 3242,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-18T04:18:30+00:00",
        "end": "2026-08-18T05:12:32+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 362m, avg 362m"
            },
            "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 \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 362m, avg 362m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7089811999999966474206303246319293975830078125,
            "lon": 33.3215713000000022248059394769370555877685546875
        },
        "time_window": {
            "start_ts": "2026-08-18T04:18:30+00:00",
            "end_ts": "2026-08-18T05:12:32+00:00"
        },
        "searched_at": "2026-08-18T10:00:08.129535+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 04:09 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 25 AIS positions
  • Period: 2026-08-18T04:24:51+00:00 to 2026-08-18T10:57:54+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 393.1000000000000227373675443232059478759765625,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-08-18T04:24:51+00:00",
        "lat": 34.70805169999999861829564906656742095947265625,
        "lon": 33.319940000000002555680111981928348541259765625
    },
    "last_point": {
        "ts": "2026-08-18T10:57:54+00:00",
        "lat": 34.708089999999998553903424181044101715087890625,
        "lon": 33.31994999999999862438926356844604015350341796875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 04:09 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 8 meters
  • Data Points: 25 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8,
    "duration_minutes": 393.1000000000000227373675443232059478759765625,
    "points": 25,
    "centroid": {
        "lat": 34.70809245999999603782271151430904865264892578125,
        "lon": 33.31995312800000874631223268806934356689453125
    },
    "bbox": {
        "min_lat": 34.70802330000000068821464083157479763031005859375,
        "min_lon": 33.319923299999999244391801767051219940185546875,
        "max_lat": 34.70814829999999773235686006955802440643310546875,
        "max_lon": 33.3199749999999994543031789362430572509765625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 18, 2026 03:10 UTC 80/100 ▼
Vessel A: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 316 meters
  • Average Distance: 321 meters
  • Duration: 5h 6m
  • Period: 2026-08-18T03:10:16+00:00 to 2026-08-18T08:16:19+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 316m, avg 321m) for 306 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 316m, avg 321m
Duration25/25Duration 306 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-18T10:00:10.524836+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 315.5,
    "avg_distance_m": 321.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 3.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 306.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 18363,
    "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": "2026-08-18T03:10:16+00:00",
        "end": "2026-08-18T08:16:19+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 316m, avg 321m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 306 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 316m, avg 321m) for 306 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.709128800000002001979737542569637298583984375,
            "lon": 33.3211782999999996945916791446506977081298828125
        },
        "time_window": {
            "start_ts": "2026-08-18T03:10:16+00:00",
            "end_ts": "2026-08-18T08:16:19+00:00"
        },
        "searched_at": "2026-08-18T10:00:10.524836+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 03:06 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 25 AIS positions
  • Period: 2026-08-18T03:51:54+00:00 to 2026-08-18T10:24:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 25,
    "first_point": {
        "ts": "2026-08-18T03:51:54+00:00",
        "lat": 34.70810329999999765959728392772376537322998046875,
        "lon": 33.31995830000000324844222632236778736114501953125
    },
    "last_point": {
        "ts": "2026-08-18T10:24:52+00:00",
        "lat": 34.70811499999999938381733954884111881256103515625,
        "lon": 33.31995500000000021145751816220581531524658203125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 03:06 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 8 meters
  • Data Points: 25 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8,
    "duration_minutes": 393,
    "points": 25,
    "centroid": {
        "lat": 34.70809279200000929677116801030933856964111328125,
        "lon": 33.31995106400000850044307298958301544189453125
    },
    "bbox": {
        "min_lat": 34.70802330000000068821464083157479763031005859375,
        "min_lon": 33.319923299999999244391801767051219940185546875,
        "max_lat": 34.708151700000001937951310537755489349365234375,
        "max_lon": 33.3199749999999994543031789362430572509765625
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 18, 2026 02:57 UTC 80/100 ▼
Vessel A: IMO 9517288 (ALFA SEA) Panama
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 359 meters
  • Average Distance: 361 meters
  • Duration: 2h 15m
  • Period: 2026-08-18T02:57:31+00:00 to 2026-08-18T05:12:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 359m, avg 361m) for 135 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 359m, avg 361m
Duration25/25Duration 135 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-18T07:45:07.158687+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 358.6000000000000227373675443232059478759765625,
    "avg_distance_m": 361.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 135,
    "overlap_duration_s": 8101,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-18T02:57:31+00:00",
        "end": "2026-08-18T05:12:32+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 359m, avg 361m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 135 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 359m, avg 361m) for 135 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7090007999999983212546794675290584564208984375,
            "lon": 33.32157190000000213103703572414815425872802734375
        },
        "time_window": {
            "start_ts": "2026-08-18T02:57:31+00:00",
            "end_ts": "2026-08-18T05:12:32+00:00"
        },
        "searched_at": "2026-08-18T07:45:07.158687+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 18, 2026 02:46 UTC 80/100 ▼
Vessel A: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 316 meters
  • Average Distance: 321 meters
  • Duration: 5h 30m
  • Period: 2026-08-18T02:46:14+00:00 to 2026-08-18T08:16:19+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 316m, avg 320m) for 330 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 316m, avg 320m
Duration25/25Duration 330 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-18T08:45:01.907518+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 315.5,
    "avg_distance_m": 320.5,
    "distance_consistency_m": 3.5,
    "duration_minutes": 330.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 19805,
    "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": "2026-08-18T02:46:14+00:00",
        "end": "2026-08-18T08:16:19+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 316m, avg 320m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 330 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 316m, avg 320m) for 330 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70912969999999830861270311288535594940185546875,
            "lon": 33.3211763999999988072886480949819087982177734375
        },
        "time_window": {
            "start_ts": "2026-08-18T02:46:14+00:00",
            "end_ts": "2026-08-18T08:16:19+00:00"
        },
        "searched_at": "2026-08-18T08:45:01.907518+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 02:27 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 11m
  • Data Points: 30 AIS positions
  • Period: 2026-08-18T02:27:52+00:00 to 2026-08-18T08:39:47+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 371.8999999999999772626324556767940521240234375,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-08-18T02:27:52+00:00",
        "lat": 34.70806499999999772398950881324708461761474609375,
        "lon": 33.31995169999999717447281000204384326934814453125
    },
    "last_point": {
        "ts": "2026-08-18T08:39:47+00:00",
        "lat": 34.70809669999999869105522520840167999267578125,
        "lon": 33.31996500000000338559402734972536563873291015625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 02:27 UTC 75.0% ▼
  • Duration: 6h 11m
  • Radius: 8 meters
  • Data Points: 30 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 371.8999999999999772626324556767940521240234375,
    "points": 30,
    "centroid": {
        "lat": 34.7080968300000023418760974891483783721923828125,
        "lon": 33.31995038666666886228995281271636486053466796875
    },
    "bbox": {
        "min_lat": 34.70802330000000068821464083157479763031005859375,
        "min_lon": 33.319923299999999244391801767051219940185546875,
        "max_lat": 34.708151700000001937951310537755489349365234375,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 18, 2026 01:33 UTC 80/100 ▼
Vessel A: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 316 meters
  • Average Distance: 321 meters
  • Duration: 6h 17m
  • Period: 2026-08-18T01:58:24+00:00 to 2026-08-18T08:16:19+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 316m, avg 321m) 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 316m, avg 321m
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: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 315.5,
    "avg_distance_m": 320.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 377.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 22675,
    "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": "2026-08-18T01:58:24+00:00",
        "end": "2026-08-18T08:16:19+00:00"
    },
    "points_count": {
        "vessel_a": 13,
        "vessel_b": 13
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 316m, avg 321m"
            },
            "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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 316m, avg 321m) 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 01:15 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 27m
  • Data Points: 30 AIS positions
  • Period: 2026-08-18T01:57:48+00:00 to 2026-08-18T08:24:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 387.1000000000000227373675443232059478759765625,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-08-18T01:57:48+00:00",
        "lat": 34.70808170000000103527781902812421321868896484375,
        "lon": 33.31995669999999876154106459580361843109130859375
    },
    "last_point": {
        "ts": "2026-08-18T08:24:52+00:00",
        "lat": 34.7080983000000031779563869349658489227294921875,
        "lon": 33.31997170000000352274582837708294391632080078125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 01:15 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 8 meters
  • Data Points: 30 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 387.1000000000000227373675443232059478759765625,
    "points": 30,
    "centroid": {
        "lat": 34.70809632999999649882738594897091388702392578125,
        "lon": 33.319950110000007725830073468387126922607421875
    },
    "bbox": {
        "min_lat": 34.70802330000000068821464083157479763031005859375,
        "min_lon": 33.319923299999999244391801767051219940185546875,
        "max_lat": 34.708151700000001937951310537755489349365234375,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 18, 2026 00:18 UTC 80/100 ▼
Vessel A: IMO 9517288 (ALFA SEA) Panama
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 356 meters
  • Average Distance: 359 meters
  • Duration: 4h 54m
  • Period: 2026-08-18T00:18:32+00:00 to 2026-08-18T05:12:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 356m, avg 359m) for 294 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 356m, avg 359m
Duration25/25Duration 294 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-18T05:45:04.888075+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 355.8999999999999772626324556767940521240234375,
    "avg_distance_m": 359.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 294,
    "overlap_duration_s": 17640,
    "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": "2026-08-18T00:18:32+00:00",
        "end": "2026-08-18T05:12:32+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 356m, avg 359m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 294 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 356m, avg 359m) for 294 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7090271000000001322405296377837657928466796875,
            "lon": 33.3215833000000003494278644211590290069580078125
        },
        "time_window": {
            "start_ts": "2026-08-18T00:18:32+00:00",
            "end_ts": "2026-08-18T05:12:32+00:00"
        },
        "searched_at": "2026-08-18T05:45:04.888075+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 18, 2026 00:13 UTC 80/100 ▼
Vessel A: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 316 meters
  • Average Distance: 320 meters
  • Duration: 3h 56m
  • Period: 2026-08-18T00:13:21+00:00 to 2026-08-18T04:10:17+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 316m, avg 320m) for 237 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 316m, avg 320m
Duration25/25Duration 237 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 315.5,
    "avg_distance_m": 320.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 3,
    "duration_minutes": 236.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 14216,
    "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": "2026-08-18T00:13:21+00:00",
        "end": "2026-08-18T04:10:17+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 316m, avg 320m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 237 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 316m, avg 320m) for 237 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 18, 2026 00:03 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 35m
  • Data Points: 33 AIS positions
  • Period: 2026-08-18T00:42:57+00:00 to 2026-08-18T07:18:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 395.8999999999999772626324556767940521240234375,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-08-18T00:42:57+00:00",
        "lat": 34.7080950000000001409716787748038768768310546875,
        "lon": 33.31996170000000034860931918956339359283447265625
    },
    "last_point": {
        "ts": "2026-08-18T07:18:51+00:00",
        "lat": 34.70802499999999923829818726517260074615478515625,
        "lon": 33.3199249999999977944753482006490230560302734375
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 18, 2026 00:03 UTC 75.0% ▼
  • Duration: 6h 35m
  • Radius: 8 meters
  • Data Points: 33 AIS positions
  • Centroid: 34.7081, 33.3199
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 395.8999999999999772626324556767940521240234375,
    "points": 33,
    "centroid": {
        "lat": 34.7080935848484699590699165128171443939208984375,
        "lon": 33.31994908787878983957853051833808422088623046875
    },
    "bbox": {
        "min_lat": 34.70802330000000068821464083157479763031005859375,
        "min_lon": 33.319923299999999244391801767051219940185546875,
        "max_lat": 34.708151700000001937951310537755489349365234375,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 17, 2026 23:06 UTC 80/100 ▼
Vessel A: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
Vessel B: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
  • Minimum Distance: 317 meters
  • Average Distance: 320 meters
  • Duration: 2h 9m
  • Period: 2026-08-17T23:06:52+00:00 to 2026-08-18T01:15:52+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AKRISIOS and VELOS AQUARIUS) maintained close proximity (min 317m, avg 320m) for 129 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 320m
Duration25/25Duration 129 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 317.19999999999998863131622783839702606201171875,
    "avg_distance_m": 320.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 129,
    "overlap_duration_s": 7740,
    "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": "2026-08-17T23:06:52+00:00",
        "end": "2026-08-18T01:15:52+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 320m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 129 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AKRISIOS and VELOS AQUARIUS) maintained close proximity (min 317m, avg 320m) for 129 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 17, 2026 23:06 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 27m
  • Data Points: 35 AIS positions
  • Period: 2026-08-17T23:15:52+00:00 to 2026-08-18T05:42:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 387.1000000000000227373675443232059478759765625,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-08-17T23:15:52+00:00",
        "lat": 34.70806329999999917390596237964928150177001953125,
        "lon": 33.31995330000000166137397172860801219940185546875
    },
    "last_point": {
        "ts": "2026-08-18T05:42:57+00:00",
        "lat": 34.70808000000000248519427259452641010284423828125,
        "lon": 33.31997170000000352274582837708294391632080078125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 17, 2026 23:06 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 7 meters
  • Data Points: 35 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 6.5,
    "duration_minutes": 387.1000000000000227373675443232059478759765625,
    "points": 35,
    "centroid": {
        "lat": 34.708096048571434266705182380974292755126953125,
        "lon": 33.31995304571429272755267447791993618011474609375
    },
    "bbox": {
        "min_lat": 34.708044999999998481143848039209842681884765625,
        "min_lon": 33.3199249999999977944753482006490230560302734375,
        "max_lat": 34.708151700000001937951310537755489349365234375,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 17, 2026 23:00 UTC 80/100 ▼
Vessel A: IMO 9517288 (ALFA SEA) Panama
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 356 meters
  • Average Distance: 361 meters
  • Duration: 5h 17m
  • Period: 2026-08-17T23:00:33+00:00 to 2026-08-18T04:18:30+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 356m, avg 361m) for 318 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 356m, avg 361m
Duration25/25Duration 318 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-18T04:45:07.613379+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 355.8999999999999772626324556767940521240234375,
    "avg_distance_m": 360.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 5.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 317.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 19077,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-17T23:00:33+00:00",
        "end": "2026-08-18T04:18:30+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 356m, avg 361m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 318 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 356m, avg 361m) for 318 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7090333000000015317709767259657382965087890625,
            "lon": 33.3215856999999999743522494100034236907958984375
        },
        "time_window": {
            "start_ts": "2026-08-17T23:00:33+00:00",
            "end_ts": "2026-08-18T04:18:30+00:00"
        },
        "searched_at": "2026-08-18T04:45:07.613379+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 17, 2026 22:24 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 35 AIS positions
  • Period: 2026-08-17T22:36:50+00:00 to 2026-08-18T05:09:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-08-17T22:36:50+00:00",
        "lat": 34.7080667000000033795004128478467464447021484375,
        "lon": 33.31995500000000021145751816220581531524658203125
    },
    "last_point": {
        "ts": "2026-08-18T05:09:52+00:00",
        "lat": 34.708048300000001518128556199371814727783203125,
        "lon": 33.31994499999999703732100897468626499176025390625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 17, 2026 22:24 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 7 meters
  • Data Points: 35 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 6.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 393,
    "points": 35,
    "centroid": {
        "lat": 34.70809424000000120713593787513673305511474609375,
        "lon": 33.31995218857142759816269972361624240875244140625
    },
    "bbox": {
        "min_lat": 34.708044999999998481143848039209842681884765625,
        "min_lon": 33.3199249999999977944753482006490230560302734375,
        "max_lat": 34.708151700000001937951310537755489349365234375,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 17, 2026 22:18 UTC 80/100 ▼
Vessel A: IMO 9517288 (ALFA SEA) Panama
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 356 meters
  • Average Distance: 362 meters
  • Duration: 6 hours
  • Period: 2026-08-17T22:18:30+00:00 to 2026-08-18T04:18:30+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 356m, avg 362m) for 360 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 356m, avg 362m
Duration25/25Duration 360 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 355.8999999999999772626324556767940521240234375,
    "avg_distance_m": 361.5,
    "distance_consistency_m": 5.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 360,
    "overlap_duration_s": 21600,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-17T22:18:30+00:00",
        "end": "2026-08-18T04:18:30+00:00"
    },
    "points_count": {
        "vessel_a": 10,
        "vessel_b": 10
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 356m, avg 362m"
            },
            "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 \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 356m, avg 362m) for 360 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 17, 2026 22:04 UTC 70/100 ▼
Vessel A: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 318 meters
  • Average Distance: 322 meters
  • Duration: 1h 24m
  • Period: 2026-08-17T22:04:25+00:00 to 2026-08-17T23:28:22+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 318m, avg 322m) for 84 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 318m, avg 322m
Duration15/25Duration 84 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-18T04:30:02.159620+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 318.1000000000000227373675443232059478759765625,
    "avg_distance_m": 321.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 2,
    "duration_minutes": 84,
    "overlap_duration_s": 5037,
    "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": "2026-08-17T22:04:25+00:00",
        "end": "2026-08-17T23:28:22+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 318m, avg 322m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 84 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 318m, avg 322m) for 84 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7091278999999985899194143712520599365234375,
            "lon": 33.32118439999999992551238392479717731475830078125
        },
        "time_window": {
            "start_ts": "2026-08-17T22:04:25+00:00",
            "end_ts": "2026-08-17T23:28:22+00:00"
        },
        "searched_at": "2026-08-18T04:30:02.159620+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 17, 2026 21:39 UTC 80/100 ▼
Vessel A: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 317 meters
  • Average Distance: 321 meters
  • Duration: 2h 18m
  • Period: 2026-08-17T21:10:12+00:00 to 2026-08-17T23:28:22+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 316m, avg 321m) for 138 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 316m, avg 321m
Duration25/25Duration 138 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 316.5,
    "avg_distance_m": 320.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.5,
    "duration_minutes": 138.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 8290,
    "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": "2026-08-17T21:10:12+00:00",
        "end": "2026-08-17T23:28:22+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 316m, avg 321m"
            },
            "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 \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 316m, avg 321m) for 138 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 17, 2026 21:27 UTC 80/100 ▼
Vessel A: IMO 9517288 (ALFA SEA) Panama
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 356 meters
  • Average Distance: 361 meters
  • Duration: 5h 21m
  • Period: 2026-08-17T21:36:29+00:00 to 2026-08-18T02:57:31+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 356m, avg 361m) for 321 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 356m, avg 361m
Duration25/25Duration 321 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 355.8999999999999772626324556767940521240234375,
    "avg_distance_m": 361.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 5,
    "duration_minutes": 321,
    "overlap_duration_s": 19262,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-17T21:36:29+00:00",
        "end": "2026-08-18T02:57:31+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 356m, avg 361m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 321 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 356m, avg 361m) for 321 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 17, 2026 21:03 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 27m
  • Data Points: 35 AIS positions
  • Period: 2026-08-17T21:57:51+00:00 to 2026-08-18T04:24:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 387,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-08-17T21:57:51+00:00",
        "lat": 34.7081433000000032507159630768001079559326171875,
        "lon": 33.3199632999999977300831233151257038116455078125
    },
    "last_point": {
        "ts": "2026-08-18T04:24:51+00:00",
        "lat": 34.70805169999999861829564906656742095947265625,
        "lon": 33.319940000000002555680111981928348541259765625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 17, 2026 21:03 UTC 75.0% ▼
  • Duration: 6h 27m
  • Radius: 6 meters
  • Data Points: 35 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 6.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 387,
    "points": 35,
    "centroid": {
        "lat": 34.708097431428569734634947963058948516845703125,
        "lon": 33.3199534257142886417568661272525787353515625
    },
    "bbox": {
        "min_lat": 34.708044999999998481143848039209842681884765625,
        "min_lon": 33.3199249999999977944753482006490230560302734375,
        "max_lat": 34.708151700000001937951310537755489349365234375,
        "max_lon": 33.31998329999999697292878408916294574737548828125
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 17, 2026 20:34 UTC 80/100 ▼
Vessel A: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 317 meters
  • Average Distance: 321 meters
  • Duration: 2h 54m
  • Period: 2026-08-17T20:34:17+00:00 to 2026-08-17T23:28:22+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 316m, avg 321m) for 174 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 316m, avg 321m
Duration25/25Duration 174 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 316.5,
    "avg_distance_m": 320.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 174.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 10445,
    "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": "2026-08-17T20:34:17+00:00",
        "end": "2026-08-17T23:28:22+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 316m, avg 321m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 174 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VELOS AQUARIUS and AKRISIOS) maintained close proximity (min 316m, avg 321m) for 174 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 17, 2026 20:18 UTC 80/100 ▼
Vessel A: IMO 9517288 (ALFA SEA) Panama
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 358 meters
  • Average Distance: 363 meters
  • Duration: 4h 33m
  • Period: 2026-08-17T20:18:22+00:00 to 2026-08-18T00:51:25+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 358m, avg 362m) for 273 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 358m, avg 362m
Duration25/25Duration 273 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 358.19999999999998863131622783839702606201171875,
    "avg_distance_m": 362.5,
    "distance_consistency_m": 4.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 273.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 16383,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-17T20:18:22+00:00",
        "end": "2026-08-18T00:51:25+00:00"
    },
    "points_count": {
        "vessel_a": 10,
        "vessel_b": 10
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 358m, avg 362m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 273 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b15m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 358m, avg 362m) for 273 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 17, 2026 20:00 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 32 AIS positions
  • Period: 2026-08-17T20:54:49+00:00 to 2026-08-18T03:24:50+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-08-17T20:54:49+00:00",
        "lat": 34.7081117000000034522599889896810054779052734375,
        "lon": 33.319981699999999591454979963600635528564453125
    },
    "last_point": {
        "ts": "2026-08-18T03:24:50+00:00",
        "lat": 34.70812000000000097088559414260089397430419921875,
        "lon": 33.319940000000002555680111981928348541259765625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 17, 2026 20:00 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 6 meters
  • Data Points: 32 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 390,
    "points": 32,
    "centroid": {
        "lat": 34.70809614687500044283297029323875904083251953125,
        "lon": 33.3199545843749973528247210197150707244873046875
    },
    "bbox": {
        "min_lat": 34.708044999999998481143848039209842681884765625,
        "min_lon": 33.3199249999999977944753482006490230560302734375,
        "max_lat": 34.7081433000000032507159630768001079559326171875,
        "max_lon": 33.319981699999999591454979963600635528564453125
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Surveillance Zone
Aug 17, 2026 19:04 UTC 75/100 ▼
Vessel A: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
Vessel B: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
  • Minimum Distance: 317 meters
  • Average Distance: 322 meters
  • Duration: 1h 54m
  • Period: 2026-08-17T19:09:56+00:00 to 2026-08-17T21:03:54+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (AKRISIOS and VELOS AQUARIUS) maintained close proximity (min 317m, avg 322m) for 114 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 322m
Duration20/25Duration 114 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-08-18T01:45:02.092145+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 317.3999999999999772626324556767940521240234375,
    "avg_distance_m": 321.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 2.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 114,
    "overlap_duration_s": 6838,
    "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": "2026-08-17T19:09:56+00:00",
        "end": "2026-08-17T21:03:54+00:00"
    },
    "points_count": {
        "vessel_a": 13,
        "vessel_b": 13
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 322m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 114 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (AKRISIOS and VELOS AQUARIUS) maintained close proximity (min 317m, avg 322m) for 114 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7091228999999970028511597774922847747802734375,
            "lon": 33.3211782999999996945916791446506977081298828125
        },
        "time_window": {
            "start_ts": "2026-08-17T19:04:13+00:00",
            "end_ts": "2026-08-17T21:03:54+00:00"
        },
        "searched_at": "2026-08-18T01:45:02.092145+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 17, 2026 19:00 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 36m
  • Data Points: 33 AIS positions
  • Period: 2026-08-17T19:51:47+00:00 to 2026-08-18T02:27:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 396.1000000000000227373675443232059478759765625,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-08-17T19:51:47+00:00",
        "lat": 34.70802669999999778838173369877040386199951171875,
        "lon": 33.319933300000002418528310954570770263671875
    },
    "last_point": {
        "ts": "2026-08-18T02:27:52+00:00",
        "lat": 34.70806499999999772398950881324708461761474609375,
        "lon": 33.31995169999999717447281000204384326934814453125
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 17, 2026 19:00 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 7 meters
  • Data Points: 33 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 7.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 396.1000000000000227373675443232059478759765625,
    "points": 33,
    "centroid": {
        "lat": 34.708088542424235356520512141287326812744140625,
        "lon": 33.31995686666666500741484924219548702239990234375
    },
    "bbox": {
        "min_lat": 34.70802669999999778838173369877040386199951171875,
        "min_lon": 33.3199283000000008314600563608109951019287109375,
        "max_lat": 34.7081433000000032507159630768001079559326171875,
        "max_lon": 33.319981699999999591454979963600635528564453125
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 17, 2026 18:40 UTC 80/100 ▼
Vessel A: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
Vessel B: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
  • Minimum Distance: 317 meters
  • Average Distance: 322 meters
  • Duration: 2h 21m
  • Period: 2026-08-17T18:42:51+00:00 to 2026-08-17T21:03:54+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AKRISIOS and VELOS AQUARIUS) maintained close proximity (min 317m, avg 322m) for 141 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 322m
Duration25/25Duration 141 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 317.3999999999999772626324556767940521240234375,
    "avg_distance_m": 321.5,
    "distance_consistency_m": 2.5,
    "duration_minutes": 141.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 8463,
    "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": "2026-08-17T18:42:51+00:00",
        "end": "2026-08-17T21:03:54+00:00"
    },
    "points_count": {
        "vessel_a": 18,
        "vessel_b": 18
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 322m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 141 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AKRISIOS and VELOS AQUARIUS) maintained close proximity (min 317m, avg 322m) for 141 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 17, 2026 18:09 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 36 AIS positions
  • Period: 2026-08-17T18:54:48+00:00 to 2026-08-18T01:24:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 390.1000000000000227373675443232059478759765625,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-08-17T18:54:48+00:00",
        "lat": 34.70809669999999869105522520840167999267578125,
        "lon": 33.31994329999999848723746254108846187591552734375
    },
    "last_point": {
        "ts": "2026-08-18T01:24:52+00:00",
        "lat": 34.70805500000000165528035722672939300537109375,
        "lon": 33.3199350000000009686118573881685733795166015625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 17, 2026 18:09 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 8 meters
  • Data Points: 36 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 7.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 390.1000000000000227373675443232059478759765625,
    "points": 36,
    "centroid": {
        "lat": 34.70809458888889054151150048710405826568603515625,
        "lon": 33.3199551333333374714129604399204254150390625
    },
    "bbox": {
        "min_lat": 34.70802669999999778838173369877040386199951171875,
        "min_lon": 33.31992000000000331283445120789110660552978515625,
        "max_lat": 34.7081433000000032507159630768001079559326171875,
        "max_lon": 33.319981699999999591454979963600635528564453125
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 17, 2026 17:34 UTC 80/100 ▼
Vessel A: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
Vessel B: IMO 9381756 (VELOS AQUARIUS) MARSHALL ISLANDS
  • Minimum Distance: 317 meters
  • Average Distance: 322 meters
  • Duration: 3h 33m
  • Period: 2026-08-17T17:30:50+00:00 to 2026-08-17T21:03:54+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (AKRISIOS and VELOS AQUARIUS) maintained close proximity (min 317m, avg 322m) for 213 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 317m, avg 322m
Duration25/25Duration 213 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538008652,
        "imo": 9381756,
        "name": "VELOS AQUARIUS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 317.3999999999999772626324556767940521240234375,
    "avg_distance_m": 322,
    "distance_consistency_m": 2.5,
    "duration_minutes": 213.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 12784,
    "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": "2026-08-17T17:30:50+00:00",
        "end": "2026-08-17T21:03:54+00:00"
    },
    "points_count": {
        "vessel_a": 25,
        "vessel_b": 25
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 317m, avg 322m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 213 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (AKRISIOS and VELOS AQUARIUS) maintained close proximity (min 317m, avg 322m) for 213 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Surveillance Zone
Aug 17, 2026 17:03 UTC 80/100 ▼
Vessel A: IMO 9517288 (ALFA SEA) Panama
Vessel B: IMO 9953456 (AKRISIOS) MARSHALL ISLANDS
  • Minimum Distance: 353 meters
  • Average Distance: 359 meters
  • Duration: 2h 5m
  • Period: 2026-08-17T17:12:33+00:00 to 2026-08-17T19:18:29+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 353m, avg 359m) for 126 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 Eastern Mediterranean Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 353m, avg 359m
Duration25/25Duration 126 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 353657000,
        "imo": 9517288,
        "name": "ALFA SEA",
        "flag": "Panama"
    },
    "vessel_b": {
        "mmsi": 538012909,
        "imo": 9953456,
        "name": "AKRISIOS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 353.19999999999998863131622783839702606201171875,
    "avg_distance_m": 359.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 125.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 7556,
    "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": "2026-08-17T17:12:33+00:00",
        "end": "2026-08-17T19:18:29+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 353m, avg 359m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 126 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: Eastern Mediterranean Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (ALFA SEA and AKRISIOS) maintained close proximity (min 353m, avg 359m) for 126 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 Eastern Mediterranean Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Surveillance Zone
Aug 17, 2026 17:00 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Surveillance Zone
  • Duration: 6h 29m
  • Data Points: 36 AIS positions
  • Period: 2026-08-17T17:51:54+00:00 to 2026-08-18T00:21:50+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_041",
    "zone_name": "Eastern Mediterranean Surveillance Zone",
    "dwell_minutes": 389.8999999999999772626324556767940521240234375,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-08-17T17:51:54+00:00",
        "lat": 34.70807669999999944820956443436443805694580078125,
        "lon": 33.31995500000000021145751816220581531524658203125
    },
    "last_point": {
        "ts": "2026-08-18T00:21:50+00:00",
        "lat": 34.70812500000000255795384873636066913604736328125,
        "lon": 33.31996500000000338559402734972536563873291015625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Surveillance Zone
Aug 17, 2026 17:00 UTC 75.0% ▼
  • Duration: 6h 29m
  • Radius: 8 meters
  • Data Points: 36 AIS positions
  • Centroid: 34.7081, 33.3200
  • Zone: Eastern Mediterranean Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 8,
    "duration_minutes": 389.8999999999999772626324556767940521240234375,
    "points": 36,
    "centroid": {
        "lat": 34.7080975055555569497300893999636173248291015625,
        "lon": 33.31995166111111217333018430508673191070556640625
    },
    "bbox": {
        "min_lat": 34.70802669999999778838173369877040386199951171875,
        "min_lon": 33.31990669999999710171323386020958423614501953125,
        "max_lat": 34.7081433000000032507159630768001079559326171875,
        "max_lon": 33.319981699999999591454979963600635528564453125
    },
    "zone_id": "discovered_041"
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Aug 19 06:17 34.7081 33.3199 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 05:47 34.7081 33.3200 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 05:26 34.7081 33.3200 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 05:11 34.7080 33.3200 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 05:08 34.7080 33.3199 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 05:02 34.7080 33.3199 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 04:53 34.7081 33.3199 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 04:50 34.7080 33.3199 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 04:47 34.7080 33.3199 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 04:35 34.7080 33.3199 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 04:20 34.7081 33.3199 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 03:50 34.7081 33.3200 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 03:32 34.7081 33.3199 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 03:29 34.7081 33.3199 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 03:26 34.7081 33.3199 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 03:20 34.7081 33.3199 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 03:14 34.7081 33.3199 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 02:56 34.7081 33.3200 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 02:41 34.7081 33.3200 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone
Aug 19 02:38 34.7081 33.3200 0.0 kn 283.0° Eastern Mediterranean Surveillance Zone

Showing 20 of 100 recent positions.

Data Source

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

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