CHEM RANGER

IMO 9490296

Vessel information

Vessel Name CHEM RANGER
IMO Number 9490296
MMSI 538004628
Vessel Type Tanker
Flag 🇲🇭 MARSHALL ISLANDS
Call Sign V7YC8
Length 159 m
Beam 27 m

Detected Events (100)

Sts Eastern Mediterranean Monitoring Zone
Nov 1, 2026 12:05 UTC 85/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
  • Minimum Distance: 51 meters
  • Average Distance: 54 meters
  • Duration: 1h 11m
  • Period: 2026-11-01T12:05:36+00:00 to 2026-11-01T13:17:30+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 51m, avg 54m) for 72 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 51m, avg 54m
Duration15/25Duration 72 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 Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 51,
    "avg_distance_m": 54,
    "distance_consistency_m": 3,
    "duration_minutes": 71.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 4314,
    "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": "2026-11-01T12:05:36+00:00",
        "end": "2026-11-01T13:17:30+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 51m, avg 54m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 72 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 Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 51m, avg 54m) for 72 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 Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Monitoring Zone
Nov 1, 2026 11:08 UTC 65/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9973913 (NAVIG8 EXCEED) Singapore
  • Minimum Distance: 323 meters
  • Average Distance: 325 meters
  • Duration: 57 minutes
  • Period: 2026-11-01T11:08:36+00:00 to 2026-11-01T12:05:36+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (CHEM RANGER and NAVIG8 EXCEED) maintained close proximity (min 323m, avg 325m) for 57 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 323m, avg 325m
Duration10/25Duration 57 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 Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 563257500,
        "imo": 9973913,
        "name": "NAVIG8 EXCEED",
        "flag": "Singapore"
    },
    "min_distance_m": 322.69999999999998863131622783839702606201171875,
    "avg_distance_m": 324.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.5,
    "duration_minutes": 57,
    "overlap_duration_s": 3420,
    "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": "2026-11-01T11:08:36+00:00",
        "end": "2026-11-01T12:05:36+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 323m, avg 325m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 57 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 Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (CHEM RANGER and NAVIG8 EXCEED) maintained close proximity (min 323m, avg 325m) for 57 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 Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Monitoring Zone
Nov 1, 2026 09:17 UTC 85/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
  • Minimum Distance: 51 meters
  • Average Distance: 56 meters
  • Duration: 1h 21m
  • Period: 2026-11-01T09:17:33+00:00 to 2026-11-01T10:38:31+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 51m, avg 56m) for 81 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 51m, avg 56m
Duration15/25Duration 81 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 Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 50.7999999999999971578290569595992565155029296875,
    "avg_distance_m": 56.39999999999999857891452847979962825775146484375,
    "distance_consistency_m": 2.5,
    "duration_minutes": 81,
    "overlap_duration_s": 4858,
    "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": "2026-11-01T09:17:33+00:00",
        "end": "2026-11-01T10:38:31+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 51m, avg 56m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 81 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 Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 51m, avg 56m) for 81 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 Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Monitoring Zone
Nov 1, 2026 08:17 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Monitoring Zone
  • Duration: 6 hours
  • Data Points: 27 AIS positions
  • Period: 2026-11-01T08:17:30+00:00 to 2026-11-01T14:17:28+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "dwell_minutes": 360,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-11-01T08:17:30+00:00",
        "lat": 34.71016670000000203799572773277759552001953125,
        "lon": 33.322616699999997535996953956782817840576171875
    },
    "last_point": {
        "ts": "2026-11-01T14:17:28+00:00",
        "lat": 34.71008330000000086101863416843116283416748046875,
        "lon": 33.322616699999997535996953956782817840576171875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Monitoring Zone
Nov 1, 2026 08:17 UTC 75.0% ▼
  • Duration: 6 hours
  • Radius: 6 meters
  • Data Points: 27 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Eastern Mediterranean Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 5.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 360,
    "points": 27,
    "centroid": {
        "lat": 34.71012221851851364817775902338325977325439453125,
        "lon": 33.32261111481481208329569199122488498687744140625
    },
    "bbox": {
        "min_lat": 34.71008330000000086101863416843116283416748046875,
        "min_lon": 33.32256670000000298159648082219064235687255859375,
        "max_lat": 34.71016670000000203799572773277759552001953125,
        "max_lon": 33.3226666999999991958247846923768520355224609375
    },
    "zone_id": "discovered_037"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Monitoring Zone
Nov 1, 2026 08:17 UTC 80/100 ▼
Vessel A: IMO 9973913 (NAVIG8 EXCEED) Singapore
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 322 meters
  • Average Distance: 326 meters
  • Duration: 2h 15m
  • Period: 2026-11-01T08:17:02+00:00 to 2026-11-01T10:32:05+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 326m) 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 322m, avg 326m
Duration25/25Duration 135 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 Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T14:00:01.593834+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563257500,
        "imo": 9973913,
        "name": "NAVIG8 EXCEED",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 321.69999999999998863131622783839702606201171875,
    "avg_distance_m": 326.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 3.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 135.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 8103,
    "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": "2026-11-01T08:17:02+00:00",
        "end": "2026-11-01T10:32:05+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 322m, avg 326m"
            },
            "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 \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 326m) 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 Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7089222999999975627360981889069080352783203125,
            "lon": 33.32160859999999757974364911206066608428955078125
        },
        "time_window": {
            "start_ts": "2026-11-01T08:17:02+00:00",
            "end_ts": "2026-11-01T10:32:05+00:00"
        },
        "searched_at": "2026-11-01T14:00:01.593834+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Monitoring Zone
Nov 1, 2026 08:05 UTC 95/100 ▼
Vessel A: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 49 meters
  • Average Distance: 55 meters
  • Duration: 5h 6m
  • Period: 2026-11-01T08:05:57+00:00 to 2026-11-01T13:11:56+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 49m, avg 55m) 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 49m, avg 55m
Duration25/25Duration 306 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 Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 48.7000000000000028421709430404007434844970703125,
    "avg_distance_m": 54.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 3.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 306,
    "overlap_duration_s": 18359,
    "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": "2026-11-01T08:05:57+00:00",
        "end": "2026-11-01T13:11:56+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 49m, avg 55m"
            },
            "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 \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 49m, avg 55m) 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 Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Monitoring Zone
Nov 1, 2026 07:59 UTC 80/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
  • Minimum Distance: 49 meters
  • Average Distance: 55 meters
  • Duration: 57 minutes
  • Period: 2026-11-01T07:59:32+00:00 to 2026-11-01T08:56:33+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 49m, avg 55m) for 57 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 49m, avg 55m
Duration10/25Duration 57 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 Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T09:30:01.854574+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 48.7000000000000028421709430404007434844970703125,
    "avg_distance_m": 54.60000000000000142108547152020037174224853515625,
    "distance_consistency_m": 5.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 57,
    "overlap_duration_s": 3421,
    "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": "2026-11-01T07:59:32+00:00",
        "end": "2026-11-01T08:56:33+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 49m, avg 55m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 57 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 Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 49m, avg 55m) for 57 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 Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70992019999999911306076683104038238525390625,
            "lon": 33.32278749999999689634933019988238811492919921875
        },
        "time_window": {
            "start_ts": "2026-11-01T07:59:32+00:00",
            "end_ts": "2026-11-01T08:56:33+00:00"
        },
        "searched_at": "2026-11-01T09:30:01.854574+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Monitoring Zone
Nov 1, 2026 07:08 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Monitoring Zone
  • Duration: 6h 17m
  • Data Points: 28 AIS positions
  • Period: 2026-11-01T07:59:32+00:00 to 2026-11-01T14:17:28+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "dwell_minutes": 377.8999999999999772626324556767940521240234375,
    "points_in_zone": 28,
    "first_point": {
        "ts": "2026-11-01T07:59:32+00:00",
        "lat": 34.7101167000000003781678969971835613250732421875,
        "lon": 33.3226666999999991958247846923768520355224609375
    },
    "last_point": {
        "ts": "2026-11-01T14:17:28+00:00",
        "lat": 34.71008330000000086101863416843116283416748046875,
        "lon": 33.322616699999997535996953956782817840576171875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Monitoring Zone
Nov 1, 2026 07:08 UTC 75.0% ▼
  • Duration: 6h 17m
  • Radius: 6 meters
  • Data Points: 28 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Eastern Mediterranean Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 5.5,
    "duration_minutes": 377.8999999999999772626324556767940521240234375,
    "points": 28,
    "centroid": {
        "lat": 34.71012202142856750697319512255489826202392578125,
        "lon": 33.3226130999999980986103764735162258148193359375
    },
    "bbox": {
        "min_lat": 34.71008330000000086101863416843116283416748046875,
        "min_lon": 33.32256670000000298159648082219064235687255859375,
        "max_lat": 34.71016670000000203799572773277759552001953125,
        "max_lon": 33.3226666999999991958247846923768520355224609375
    },
    "zone_id": "discovered_037"
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Monitoring Zone
Nov 1, 2026 07:04 UTC 80/100 ▼
Vessel A: IMO 9973913 (NAVIG8 EXCEED) Singapore
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 322 meters
  • Average Distance: 327 meters
  • Duration: 3h 27m
  • Period: 2026-11-01T07:04:59+00:00 to 2026-11-01T10:32:05+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 327m) for 207 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 322m, avg 327m
Duration25/25Duration 207 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 Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T13:15:01.607028+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563257500,
        "imo": 9973913,
        "name": "NAVIG8 EXCEED",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 321.69999999999998863131622783839702606201171875,
    "avg_distance_m": 327.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 2.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 207.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 12426,
    "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": "2026-11-01T07:04:59+00:00",
        "end": "2026-11-01T10:32:05+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 322m, avg 327m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 207 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 Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 327m) for 207 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 Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7089165000000008376446203328669071197509765625,
            "lon": 33.32160830000000117934177978895604610443115234375
        },
        "time_window": {
            "start_ts": "2026-11-01T07:04:59+00:00",
            "end_ts": "2026-11-01T10:32:05+00:00"
        },
        "searched_at": "2026-11-01T13:15:01.607028+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Monitoring Zone
Nov 1, 2026 06:50 UTC 80/100 ▼
Vessel A: IMO 9973913 (NAVIG8 EXCEED) Singapore
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 322 meters
  • Average Distance: 327 meters
  • Duration: 3h 45m
  • Period: 2026-11-01T06:46:58+00:00 to 2026-11-01T10:32:05+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 327m) for 225 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 322m, avg 327m
Duration25/25Duration 225 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 Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563257500,
        "imo": 9973913,
        "name": "NAVIG8 EXCEED",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 321.69999999999998863131622783839702606201171875,
    "avg_distance_m": 326.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 2.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 225.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 13507,
    "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": "2026-11-01T06:46:58+00:00",
        "end": "2026-11-01T10:32:05+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 322m, avg 327m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 225 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 Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 327m) for 225 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 Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Monitoring Zone
Nov 1, 2026 06:14 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Monitoring Zone
  • Duration: 6h 36m
  • Data Points: 27 AIS positions
  • Period: 2026-11-01T06:50:31+00:00 to 2026-11-01T13:26:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 27,
    "first_point": {
        "ts": "2026-11-01T06:50:31+00:00",
        "lat": 34.71008330000000086101863416843116283416748046875,
        "lon": 33.32260000000000133013600134290754795074462890625
    },
    "last_point": {
        "ts": "2026-11-01T13:26:33+00:00",
        "lat": 34.7100999999999970668795867823064327239990234375,
        "lon": 33.322616699999997535996953956782817840576171875
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Monitoring Zone
Nov 1, 2026 06:14 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 6 meters
  • Data Points: 27 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Eastern Mediterranean Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 5.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 396,
    "points": 27,
    "centroid": {
        "lat": 34.71012345555555356213517370633780956268310546875,
        "lon": 33.32261235185185199725310667417943477630615234375
    },
    "bbox": {
        "min_lat": 34.71008330000000086101863416843116283416748046875,
        "min_lon": 33.32256670000000298159648082219064235687255859375,
        "max_lat": 34.71016670000000203799572773277759552001953125,
        "max_lon": 33.3226666999999991958247846923768520355224609375
    },
    "zone_id": "discovered_037"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Nov 1, 2026 06:04 UTC 65/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9363780 (TWINKLE STAR) MARSHALL ISLANDS
  • Minimum Distance: 325 meters
  • Average Distance: 329 meters
  • Duration: 54 minutes
  • Period: 2026-11-01T06:14:32+00:00 to 2026-11-01T07:08:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 325m, avg 328m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 325m, avg 328m
Duration10/25Duration 54 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538005294,
        "imo": 9363780,
        "name": "TWINKLE STAR",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 325.1000000000000227373675443232059478759765625,
    "avg_distance_m": 328.5,
    "distance_consistency_m": 3.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 54,
    "overlap_duration_s": 3240,
    "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": "2026-11-01T06:14:32+00:00",
        "end": "2026-11-01T07:08:32+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 325m, avg 328m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 54 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 325m, avg 328m) for 54 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Monitoring Zone
Nov 1, 2026 06:04 UTC 70/100 ▼
Vessel A: IMO 9363780 (TWINKLE STAR) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 325 meters
  • Average Distance: 330 meters
  • Duration: 1h 9m
  • Period: 2026-11-01T06:04:44+00:00 to 2026-11-01T07:13:43+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (TWINKLE STAR and CHEM RANGER) maintained close proximity (min 325m, avg 330m) for 69 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 325m, avg 330m
Duration15/25Duration 69 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 Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T08:30:05.426095+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005294,
        "imo": 9363780,
        "name": "TWINKLE STAR",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 325.1000000000000227373675443232059478759765625,
    "avg_distance_m": 329.5,
    "distance_consistency_m": 2.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 69,
    "overlap_duration_s": 4139,
    "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": "2026-11-01T06:04:44+00:00",
        "end": "2026-11-01T07:13:43+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 325m, avg 330m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 69 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 Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (TWINKLE STAR and CHEM RANGER) maintained close proximity (min 325m, avg 330m) for 69 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 Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70912630000000120844561024568974971771240234375,
            "lon": 33.32128780000000034533513826318085193634033203125
        },
        "time_window": {
            "start_ts": "2026-11-01T06:04:44+00:00",
            "end_ts": "2026-11-01T07:13:43+00:00"
        },
        "searched_at": "2026-11-01T08:30:05.426095+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Nov 1, 2026 05:26 UTC 80/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
  • Minimum Distance: 62 meters
  • Average Distance: 62 meters
  • Duration: 48 minutes
  • Period: 2026-11-01T05:26:32+00:00 to 2026-11-01T06:14:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 62m, avg 62m) for 48 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 62m, avg 62m
Duration10/25Duration 48 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±0m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T07:00:08.818278+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 61.7999999999999971578290569595992565155029296875,
    "avg_distance_m": 61.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 0.1000000000000000055511151231257827021181583404541015625,
    "duration_minutes": 48,
    "overlap_duration_s": 2880,
    "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": "2026-11-01T05:26:32+00:00",
        "end": "2026-11-01T06:14:32+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 62m, avg 62m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 48 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b10m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 62m, avg 62m) for 48 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7098979000000014139004633761942386627197265625,
            "lon": 33.32277119999999825949998921714723110198974609375
        },
        "time_window": {
            "start_ts": "2026-11-01T05:26:32+00:00",
            "end_ts": "2026-11-01T06:14:32+00:00"
        },
        "searched_at": "2026-11-01T07:00:08.818278+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Monitoring Zone
Nov 1, 2026 05:26 UTC 80/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
  • Minimum Distance: 62 meters
  • Average Distance: 62 meters
  • Duration: 48 minutes
  • Period: 2026-11-01T05:26:32+00:00 to 2026-11-01T06:14:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 62m, avg 62m) for 48 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 62m, avg 62m
Duration10/25Duration 48 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±0m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T09:15:01.947698+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 61.7999999999999971578290569595992565155029296875,
    "avg_distance_m": 61.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 0.1000000000000000055511151231257827021181583404541015625,
    "duration_minutes": 48,
    "overlap_duration_s": 2880,
    "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": "2026-11-01T05:26:32+00:00",
        "end": "2026-11-01T06:14:32+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 62m, avg 62m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 48 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b10m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 62m, avg 62m) for 48 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 Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7098979000000014139004633761942386627197265625,
            "lon": 33.32277119999999825949998921714723110198974609375
        },
        "time_window": {
            "start_ts": "2026-11-01T05:26:32+00:00",
            "end_ts": "2026-11-01T06:14:32+00:00"
        },
        "searched_at": "2026-11-01T09:15:01.947698+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Monitoring Zone
Nov 1, 2026 05:11 UTC 80/100 ▼
Vessel A: IMO 9973913 (NAVIG8 EXCEED) Singapore
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 322 meters
  • Average Distance: 327 meters
  • Duration: 5h 21m
  • Period: 2026-11-01T05:11:00+00:00 to 2026-11-01T10:32:05+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 327m) for 321 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 322m, avg 327m
Duration25/25Duration 321 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 Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T11:45:01.476749+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563257500,
        "imo": 9973913,
        "name": "NAVIG8 EXCEED",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 321.69999999999998863131622783839702606201171875,
    "avg_distance_m": 326.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.5,
    "duration_minutes": 321.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 19265,
    "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": "2026-11-01T05:11:00+00:00",
        "end": "2026-11-01T10:32:05+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 322m, avg 327m"
            },
            "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 \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 327m) for 321 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 Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7089126999999990630385582335293292999267578125,
            "lon": 33.321598399999999173815012909471988677978515625
        },
        "time_window": {
            "start_ts": "2026-11-01T05:11:00+00:00",
            "end_ts": "2026-11-01T10:32:05+00:00"
        },
        "searched_at": "2026-11-01T11:45:01.476749+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Monitoring Zone
Nov 1, 2026 05:05 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Monitoring Zone
  • Duration: 6h 36m
  • Data Points: 26 AIS positions
  • Period: 2026-11-01T05:20:33+00:00 to 2026-11-01T11:56:31+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "dwell_minutes": 396,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-11-01T05:20:33+00:00",
        "lat": 34.7101167000000003781678969971835613250732421875,
        "lon": 33.32260000000000133013600134290754795074462890625
    },
    "last_point": {
        "ts": "2026-11-01T11:56:31+00:00",
        "lat": 34.71016670000000203799572773277759552001953125,
        "lon": 33.32260000000000133013600134290754795074462890625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Monitoring Zone
Nov 1, 2026 05:05 UTC 75.0% ▼
  • Duration: 6h 36m
  • Radius: 6 meters
  • Data Points: 26 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Eastern Mediterranean Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 5.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 396,
    "points": 26,
    "centroid": {
        "lat": 34.71012691923078108402478392235934734344482421875,
        "lon": 33.32261218461538732071858248673379421234130859375
    },
    "bbox": {
        "min_lat": 34.71008330000000086101863416843116283416748046875,
        "min_lon": 33.32258329999999801884769112803041934967041015625,
        "max_lat": 34.71016670000000203799572773277759552001953125,
        "max_lon": 33.3226666999999991958247846923768520355224609375
    },
    "zone_id": "discovered_037"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Nov 1, 2026 04:40 UTC 80/100 ▼
Vessel A: IMO 9973913 (NAVIG8 EXCEED) Singapore
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 324 meters
  • Average Distance: 325 meters
  • Duration: 2h 6m
  • Period: 2026-11-01T04:40:56+00:00 to 2026-11-01T06:46:58+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 324m, avg 325m) 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 324m, avg 325m
Duration25/25Duration 126 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563257500,
        "imo": 9973913,
        "name": "NAVIG8 EXCEED",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 323.6000000000000227373675443232059478759765625,
    "avg_distance_m": 325.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 1,
    "duration_minutes": 126,
    "overlap_duration_s": 7562,
    "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": "2026-11-01T04:40:56+00:00",
        "end": "2026-11-01T06:46:58+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 324m, avg 325m"
            },
            "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 \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 324m, avg 325m) 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Eastern Mediterranean Monitoring Zone
Nov 1, 2026 04:40 UTC 80/100 ▼
Vessel A: IMO 9973913 (NAVIG8 EXCEED) Singapore
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 322 meters
  • Average Distance: 326 meters
  • Duration: 5h 51m
  • Period: 2026-11-01T04:40:56+00:00 to 2026-11-01T10:32:05+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 326m) for 351 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 322m, avg 326m
Duration25/25Duration 351 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 Monitoring Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563257500,
        "imo": 9973913,
        "name": "NAVIG8 EXCEED",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 321.69999999999998863131622783839702606201171875,
    "avg_distance_m": 326.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 351.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 21069,
    "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": "2026-11-01T04:40:56+00:00",
        "end": "2026-11-01T10:32:05+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 322m, avg 326m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 351 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 Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 326m) for 351 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 Monitoring Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Monitoring Zone
Nov 1, 2026 04:38 UTC 80/100 ▼
Vessel A: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 58 meters
  • Average Distance: 60 meters
  • Duration: 56 minutes
  • Period: 2026-11-01T04:38:58+00:00 to 2026-11-01T05:35:54+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 58m, avg 60m) for 57 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 58m, avg 60m
Duration10/25Duration 57 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 Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T10:45:02.073161+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 58,
    "avg_distance_m": 60,
    "distance_consistency_m": 2.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 56.89999999999999857891452847979962825775146484375,
    "overlap_duration_s": 3416,
    "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": "2026-11-01T04:38:58+00:00",
        "end": "2026-11-01T05:35:54+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 58m, avg 60m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 57 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 Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 58m, avg 60m) for 57 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 Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70990040000000220743459067307412624359130859375,
            "lon": 33.32275249999999999772626324556767940521240234375
        },
        "time_window": {
            "start_ts": "2026-11-01T04:38:58+00:00",
            "end_ts": "2026-11-01T05:35:54+00:00"
        },
        "searched_at": "2026-11-01T10:45:02.073161+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Monitoring Zone
Nov 1, 2026 04:38 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Monitoring Zone
  • Duration: 6h 21m
  • Data Points: 26 AIS positions
  • Period: 2026-11-01T04:50:34+00:00 to 2026-11-01T11:11:35+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "dwell_minutes": 381,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-11-01T04:50:34+00:00",
        "lat": 34.7101167000000003781678969971835613250732421875,
        "lon": 33.32254999999999967030817060731351375579833984375
    },
    "last_point": {
        "ts": "2026-11-01T11:11:35+00:00",
        "lat": 34.7101167000000003781678969971835613250732421875,
        "lon": 33.32260000000000133013600134290754795074462890625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Monitoring Zone
Nov 1, 2026 04:38 UTC 75.0% ▼
  • Duration: 6h 21m
  • Radius: 7 meters
  • Data Points: 26 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Eastern Mediterranean Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 7.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 381,
    "points": 26,
    "centroid": {
        "lat": 34.7101269192307739785974263213574886322021484375,
        "lon": 33.32260769615385243014316074550151824951171875
    },
    "bbox": {
        "min_lat": 34.71008330000000086101863416843116283416748046875,
        "min_lon": 33.322533300000003464447217993438243865966796875,
        "max_lat": 34.71016670000000203799572773277759552001953125,
        "max_lon": 33.3226666999999991958247846923768520355224609375
    },
    "zone_id": "discovered_037"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Nov 1, 2026 04:34 UTC 60/100 ▼
Vessel A: IMO 9363780 (TWINKLE STAR) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 324 meters
  • Average Distance: 325 meters
  • Duration: 30 minutes
  • Period: 2026-11-01T04:34:45+00:00 to 2026-11-01T05:04:47+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (TWINKLE STAR and CHEM RANGER) maintained close proximity (min 324m, avg 325m) for 30 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 324m, avg 325m
Duration5/25Duration 30 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±0m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T06:15:01.419316+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005294,
        "imo": 9363780,
        "name": "TWINKLE STAR",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 324.3999999999999772626324556767940521240234375,
    "avg_distance_m": 324.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 0.40000000000000002220446049250313080847263336181640625,
    "duration_minutes": 30,
    "overlap_duration_s": 1802,
    "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": "2026-11-01T04:34:45+00:00",
        "end": "2026-11-01T05:04:47+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 324m, avg 325m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 30 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b10m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (TWINKLE STAR and CHEM RANGER) maintained close proximity (min 324m, avg 325m) for 30 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.709119200000003502282197587192058563232421875,
            "lon": 33.32125769999999675974322599358856678009033203125
        },
        "time_window": {
            "start_ts": "2026-11-01T04:34:45+00:00",
            "end_ts": "2026-11-01T05:04:47+00:00"
        },
        "searched_at": "2026-11-01T06:15:01.419316+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Monitoring Zone
Nov 1, 2026 04:34 UTC 60/100 ▼
Vessel A: IMO 9363780 (TWINKLE STAR) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 324 meters
  • Average Distance: 325 meters
  • Duration: 30 minutes
  • Period: 2026-11-01T04:34:45+00:00 to 2026-11-01T05:04:47+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (TWINKLE STAR and CHEM RANGER) maintained close proximity (min 324m, avg 325m) for 30 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 324m, avg 325m
Duration5/25Duration 30 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±0m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Eastern Mediterranean Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T08:30:02.246012+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005294,
        "imo": 9363780,
        "name": "TWINKLE STAR",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 324.3999999999999772626324556767940521240234375,
    "avg_distance_m": 324.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 0.40000000000000002220446049250313080847263336181640625,
    "duration_minutes": 30,
    "overlap_duration_s": 1802,
    "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": "2026-11-01T04:34:45+00:00",
        "end": "2026-11-01T05:04:47+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 324m, avg 325m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 30 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b10m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (TWINKLE STAR and CHEM RANGER) maintained close proximity (min 324m, avg 325m) for 30 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 Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.709119200000003502282197587192058563232421875,
            "lon": 33.32125769999999675974322599358856678009033203125
        },
        "time_window": {
            "start_ts": "2026-11-01T04:34:45+00:00",
            "end_ts": "2026-11-01T05:04:47+00:00"
        },
        "searched_at": "2026-11-01T08:30:02.246012+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Monitoring Zone
Nov 1, 2026 03:32 UTC 75/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9363780 (TWINKLE STAR) MARSHALL ISLANDS
  • Minimum Distance: 325 meters
  • Average Distance: 327 meters
  • Duration: 1h 33m
  • Period: 2026-11-01T03:32:33+00:00 to 2026-11-01T05:05:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 325m, avg 326m) 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 325m, avg 326m
Duration20/25Duration 93 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 Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T09:15:10.820104+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538005294,
        "imo": 9363780,
        "name": "TWINKLE STAR",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 324.6000000000000227373675443232059478759765625,
    "avg_distance_m": 326.5,
    "distance_consistency_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 93,
    "overlap_duration_s": 5579,
    "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": "2026-11-01T03:32:33+00:00",
        "end": "2026-11-01T05:05:32+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 325m, avg 326m"
            },
            "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 \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Eastern Mediterranean Monitoring Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 325m, avg 326m) 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 Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.709125999999997702616383321583271026611328125,
            "lon": 33.32126509999999797173586557619273662567138671875
        },
        "time_window": {
            "start_ts": "2026-11-01T03:32:33+00:00",
            "end_ts": "2026-11-01T05:05:32+00:00"
        },
        "searched_at": "2026-11-01T09:15:10.820104+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Monitoring Zone
Nov 1, 2026 03:32 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Monitoring Zone
  • Duration: 6h 33m
  • Data Points: 23 AIS positions
  • Period: 2026-11-01T03:44:32+00:00 to 2026-11-01T10:17:35+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "dwell_minutes": 393.1000000000000227373675443232059478759765625,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-11-01T03:44:32+00:00",
        "lat": 34.71013330000000252084646490402519702911376953125,
        "lon": 33.32258329999999801884769112803041934967041015625
    },
    "last_point": {
        "ts": "2026-11-01T10:17:35+00:00",
        "lat": 34.71013330000000252084646490402519702911376953125,
        "lon": 33.32258329999999801884769112803041934967041015625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Monitoring Zone
Nov 1, 2026 03:32 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 7 meters
  • Data Points: 23 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Eastern Mediterranean Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 7.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 393.1000000000000227373675443232059478759765625,
    "points": 23,
    "centroid": {
        "lat": 34.7101260826087099076175945810973644256591796875,
        "lon": 33.3226050782608780309601570479571819305419921875
    },
    "bbox": {
        "min_lat": 34.71008330000000086101863416843116283416748046875,
        "min_lon": 33.322533300000003464447217993438243865966796875,
        "max_lat": 34.71016670000000203799572773277759552001953125,
        "max_lon": 33.3226666999999991958247846923768520355224609375
    },
    "zone_id": "discovered_037"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Nov 1, 2026 03:26 UTC 95/100 ▼
Vessel A: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 58 meters
  • Average Distance: 59 meters
  • Duration: 2h 8m
  • Period: 2026-11-01T03:26:57+00:00 to 2026-11-01T05:35:54+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 58m, avg 59m) 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 58m, avg 59m
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: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 58,
    "avg_distance_m": 59.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 1.5,
    "duration_minutes": 128.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 7737,
    "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": "2026-11-01T03:26:57+00:00",
        "end": "2026-11-01T05:35:54+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 58m, avg 59m"
            },
            "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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 58m, avg 59m) 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Monitoring Zone
Nov 1, 2026 03:26 UTC 95/100 ▼
Vessel A: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 58 meters
  • Average Distance: 59 meters
  • Duration: 2h 8m
  • Period: 2026-11-01T03:26:57+00:00 to 2026-11-01T05:35:54+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 58m, avg 59m) 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 58m, avg 59m
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 Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T08:30:07.899920+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 58,
    "avg_distance_m": 59.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 1.5,
    "duration_minutes": 128.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 7737,
    "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": "2026-11-01T03:26:57+00:00",
        "end": "2026-11-01T05:35:54+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 58m, avg 59m"
            },
            "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 Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 58m, avg 59m) 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 Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.709913499999998975908965803682804107666015625,
            "lon": 33.32276139999999742258296464569866657257080078125
        },
        "time_window": {
            "start_ts": "2026-11-01T03:26:57+00:00",
            "end_ts": "2026-11-01T05:35:54+00:00"
        },
        "searched_at": "2026-11-01T08:30:07.899920+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Eastern Mediterranean Monitoring Zone
Nov 1, 2026 02:23 UTC 95/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
  • Minimum Distance: 54 meters
  • Average Distance: 58 meters
  • Duration: 2h 15m
  • Period: 2026-11-01T02:23:33+00:00 to 2026-11-01T04:38:36+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Eastern Mediterranean Monitoring Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 54m, avg 58m) 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 Monitoring Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 54m, avg 58m
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 Monitoring Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T09:00:13.278896+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 54.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 57.89999999999999857891452847979962825775146484375,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 135.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 8103,
    "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": "2026-11-01T02:23:33+00:00",
        "end": "2026-11-01T04:38:36+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 54m, avg 58m"
            },
            "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 Monitoring Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 54m, avg 58m) 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 Monitoring Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7099199999999967758412822149693965911865234375,
            "lon": 33.3227712999999994281097315251827239990234375
        },
        "time_window": {
            "start_ts": "2026-11-01T02:23:33+00:00",
            "end_ts": "2026-11-01T04:38:36+00:00"
        },
        "searched_at": "2026-11-01T09:00:13.278896+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Nov 1, 2026 02:08 UTC 95/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
  • Minimum Distance: 53 meters
  • Average Distance: 57 meters
  • Duration: 2h 30m
  • Period: 2026-11-01T02:08:33+00:00 to 2026-11-01T04:38:36+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 53m, avg 57m) for 150 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 53m, avg 57m
Duration25/25Duration 150 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 52.89999999999999857891452847979962825775146484375,
    "avg_distance_m": 57.10000000000000142108547152020037174224853515625,
    "distance_consistency_m": 2.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 150.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 9003,
    "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": "2026-11-01T02:08:33+00:00",
        "end": "2026-11-01T04:38:36+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 53m, avg 57m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 150 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 53m, avg 57m) for 150 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Nov 1, 2026 02:08 UTC 80/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9363780 (TWINKLE STAR) MARSHALL ISLANDS
  • Minimum Distance: 324 meters
  • Average Distance: 327 meters
  • Duration: 2h 57m
  • Period: 2026-11-01T02:08:33+00:00 to 2026-11-01T05:05:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 324m, avg 327m) for 177 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 324m, avg 327m
Duration25/25Duration 177 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T08:15:02.195588+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538005294,
        "imo": 9363780,
        "name": "TWINKLE STAR",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 324.19999999999998863131622783839702606201171875,
    "avg_distance_m": 326.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 2.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 177,
    "overlap_duration_s": 10619,
    "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": "2026-11-01T02:08:33+00:00",
        "end": "2026-11-01T05:05:32+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 324m, avg 327m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 177 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 324m, avg 327m) for 177 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70912299999999817146090208552777767181396484375,
            "lon": 33.3212711999999982026565703563392162322998046875
        },
        "time_window": {
            "start_ts": "2026-11-01T02:08:33+00:00",
            "end_ts": "2026-11-01T05:05:32+00:00"
        },
        "searched_at": "2026-11-01T08:15:02.195588+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Eastern Mediterranean Monitoring Zone
Nov 1, 2026 02:08 UTC 80.0% ▼
  • Zone: Eastern Mediterranean Monitoring Zone
  • Duration: 6h 33m
  • Data Points: 18 AIS positions
  • Period: 2026-11-01T02:23:33+00:00 to 2026-11-01T08:56:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_037",
    "zone_name": "Eastern Mediterranean Monitoring Zone",
    "dwell_minutes": 393,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-11-01T02:23:33+00:00",
        "lat": 34.71013330000000252084646490402519702911376953125,
        "lon": 33.32265000000000298996383207850158214569091796875
    },
    "last_point": {
        "ts": "2026-11-01T08:56:33+00:00",
        "lat": 34.7101167000000003781678969971835613250732421875,
        "lon": 33.32260000000000133013600134290754795074462890625
    }
}
Methodology: 2026.01.18
Loiter Eastern Mediterranean Monitoring Zone
Nov 1, 2026 02:08 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 7 meters
  • Data Points: 18 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Eastern Mediterranean Monitoring Zone
Show Raw Evidence JSON
{
    "radius_m": 6.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 393,
    "points": 18,
    "centroid": {
        "lat": 34.710127777777785240687080658972263336181640625,
        "lon": 33.32260092777777771289038355462253093719482421875
    },
    "bbox": {
        "min_lat": 34.71008330000000086101863416843116283416748046875,
        "min_lon": 33.322533300000003464447217993438243865966796875,
        "max_lat": 34.71016670000000203799572773277759552001953125,
        "max_lon": 33.3226666999999991958247846923768520355224609375
    },
    "zone_id": "discovered_037"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Nov 1, 2026 01:08 UTC 80/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9363780 (TWINKLE STAR) MARSHALL ISLANDS
  • Minimum Distance: 324 meters
  • Average Distance: 328 meters
  • Duration: 3h 57m
  • Period: 2026-11-01T01:08:31+00:00 to 2026-11-01T05:05:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 324m, avg 328m) 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 324m, avg 328m
Duration25/25Duration 237 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T07:00:04.412259+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538005294,
        "imo": 9363780,
        "name": "TWINKLE STAR",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 324.19999999999998863131622783839702606201171875,
    "avg_distance_m": 328.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 3.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 237,
    "overlap_duration_s": 14221,
    "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": "2026-11-01T01:08:31+00:00",
        "end": "2026-11-01T05:05:32+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 324m, avg 328m"
            },
            "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 \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 324m, avg 328m) 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.709122600000000602449290454387664794921875,
            "lon": 33.3212797999999992271114024333655834197998046875
        },
        "time_window": {
            "start_ts": "2026-11-01T01:08:31+00:00",
            "end_ts": "2026-11-01T05:05:32+00:00"
        },
        "searched_at": "2026-11-01T07:00:04.412259+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Nov 1, 2026 01:08 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 39m
  • Data Points: 16 AIS positions
  • Period: 2026-11-01T01:20:32+00:00 to 2026-11-01T07:59:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 399,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-11-01T01:20:32+00:00",
        "lat": 34.71013330000000252084646490402519702911376953125,
        "lon": 33.3226666999999991958247846923768520355224609375
    },
    "last_point": {
        "ts": "2026-11-01T07:59:32+00:00",
        "lat": 34.7101167000000003781678969971835613250732421875,
        "lon": 33.3226666999999991958247846923768520355224609375
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Nov 1, 2026 01:08 UTC 75.0% ▼
  • Duration: 6h 39m
  • Radius: 7 meters
  • Data Points: 16 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 6.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 399,
    "points": 16,
    "centroid": {
        "lat": 34.7101249937500000442014425061643123626708984375,
        "lon": 33.32260000000000133013600134290754795074462890625
    },
    "bbox": {
        "min_lat": 34.71008330000000086101863416843116283416748046875,
        "min_lon": 33.322533300000003464447217993438243865966796875,
        "max_lat": 34.7101499999999987267074175179004669189453125,
        "max_lon": 33.3226666999999991958247846923768520355224609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Nov 1, 2026 00:20 UTC 80/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9363780 (TWINKLE STAR) MARSHALL ISLANDS
  • Minimum Distance: 324 meters
  • Average Distance: 329 meters
  • Duration: 3h 23m
  • Period: 2026-11-01T00:20:36+00:00 to 2026-11-01T03:44:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 324m, avg 329m) for 204 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 324m, avg 329m
Duration25/25Duration 204 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538005294,
        "imo": 9363780,
        "name": "TWINKLE STAR",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 324.19999999999998863131622783839702606201171875,
    "avg_distance_m": 329.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 203.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 12236,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-11-01T00:20:36+00:00",
        "end": "2026-11-01T03:44:32+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 324m, avg 329m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 204 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 324m, avg 329m) for 204 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Nov 1, 2026 00:20 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 29m
  • Data Points: 17 AIS positions
  • Period: 2026-11-01T00:20:36+00:00 to 2026-11-01T06:50:31+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 389.8999999999999772626324556767940521240234375,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-11-01T00:20:36+00:00",
        "lat": 34.7100999999999970668795867823064327239990234375,
        "lon": 33.322616699999997535996953956782817840576171875
    },
    "last_point": {
        "ts": "2026-11-01T06:50:31+00:00",
        "lat": 34.71008330000000086101863416843116283416748046875,
        "lon": 33.32260000000000133013600134290754795074462890625
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Nov 1, 2026 00:20 UTC 65/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9973913 (NAVIG8 EXCEED) Singapore
  • Minimum Distance: 324 meters
  • Average Distance: 328 meters
  • Duration: 59 minutes
  • Period: 2026-11-01T00:20:36+00:00 to 2026-11-01T01:20:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (CHEM RANGER and NAVIG8 EXCEED) maintained close proximity (min 324m, avg 328m) for 60 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 324m, avg 328m
Duration10/25Duration 60 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T04:45:01.845829+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 563257500,
        "imo": 9973913,
        "name": "NAVIG8 EXCEED",
        "flag": "Singapore"
    },
    "min_distance_m": 323.80000000000001136868377216160297393798828125,
    "avg_distance_m": 327.5,
    "distance_consistency_m": 4.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 59.89999999999999857891452847979962825775146484375,
    "overlap_duration_s": 3596,
    "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": "2026-11-01T00:20:36+00:00",
        "end": "2026-11-01T01:20:32+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 324m, avg 328m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 60 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (CHEM RANGER and NAVIG8 EXCEED) maintained close proximity (min 324m, avg 328m) for 60 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70889849999999654528437531553208827972412109375,
            "lon": 33.321625199999999722422217018902301788330078125
        },
        "time_window": {
            "start_ts": "2026-11-01T00:20:36+00:00",
            "end_ts": "2026-11-01T01:20:32+00:00"
        },
        "searched_at": "2026-11-01T04:45:01.845829+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Nov 1, 2026 00:20 UTC 75.0% ▼
  • Duration: 6h 29m
  • Radius: 7 meters
  • Data Points: 17 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 6.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 389.8999999999999772626324556767940521240234375,
    "points": 17,
    "centroid": {
        "lat": 34.710122535294118506499216891825199127197265625,
        "lon": 33.3226009823529381037587882019579410552978515625
    },
    "bbox": {
        "min_lat": 34.71008330000000086101863416843116283416748046875,
        "min_lon": 33.322533300000003464447217993438243865966796875,
        "max_lat": 34.7101499999999987267074175179004669189453125,
        "max_lon": 33.3226666999999991958247846923768520355224609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 31, 2026 21:50 UTC 80/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9973913 (NAVIG8 EXCEED) Singapore
  • Minimum Distance: 324 meters
  • Average Distance: 328 meters
  • Duration: 3h 30m
  • Period: 2026-10-31T21:50:32+00:00 to 2026-11-01T01:20:32+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (CHEM RANGER and NAVIG8 EXCEED) maintained close proximity (min 324m, avg 328m) for 210 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 324m, avg 328m
Duration25/25Duration 210 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 563257500,
        "imo": 9973913,
        "name": "NAVIG8 EXCEED",
        "flag": "Singapore"
    },
    "min_distance_m": 323.80000000000001136868377216160297393798828125,
    "avg_distance_m": 327.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 3.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 210,
    "overlap_duration_s": 12600,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T21:50:32+00:00",
        "end": "2026-11-01T01:20:32+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 324m, avg 328m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 210 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM RANGER and NAVIG8 EXCEED) maintained close proximity (min 324m, avg 328m) for 210 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 31, 2026 21:11 UTC 95/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
  • Minimum Distance: 54 meters
  • Average Distance: 56 meters
  • Duration: 3h 9m
  • Period: 2026-10-31T21:11:32+00:00 to 2026-11-01T00:20:36+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 54m, avg 56m) 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 54m, avg 56m
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: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T03:15:04.300836+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 54.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 56.2999999999999971578290569595992565155029296875,
    "distance_consistency_m": 2.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 189.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 11344,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T21:11:32+00:00",
        "end": "2026-11-01T00:20:36+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 54m, avg 56m"
            },
            "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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 54m, avg 56m) 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.709909199999998463681549765169620513916015625,
            "lon": 33.32278360000000105856088339351117610931396484375
        },
        "time_window": {
            "start_ts": "2026-10-31T21:11:32+00:00",
            "end_ts": "2026-11-01T00:20:36+00:00"
        },
        "searched_at": "2026-11-01T03:15:04.300836+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 21:11 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 11 AIS positions
  • Period: 2026-10-31T21:11:32+00:00 to 2026-11-01T03:44:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 11,
    "first_point": {
        "ts": "2026-10-31T21:11:32+00:00",
        "lat": 34.7101167000000003781678969971835613250732421875,
        "lon": 33.32260000000000133013600134290754795074462890625
    },
    "last_point": {
        "ts": "2026-11-01T03:44:32+00:00",
        "lat": 34.71013330000000252084646490402519702911376953125,
        "lon": 33.32258329999999801884769112803041934967041015625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 21:11 UTC 75.0% ▼
  • Duration: 6h 33m
  • Radius: 5 meters
  • Data Points: 11 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 393,
    "points": 11,
    "centroid": {
        "lat": 34.710122709090910575469024479389190673828125,
        "lon": 33.3226166636363672068910091184079647064208984375
    },
    "bbox": {
        "min_lat": 34.71008330000000086101863416843116283416748046875,
        "min_lon": 33.32258329999999801884769112803041934967041015625,
        "max_lat": 34.7101499999999987267074175179004669189453125,
        "max_lon": 33.3226666999999991958247846923768520355224609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 31, 2026 20:53 UTC 95/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
  • Minimum Distance: 54 meters
  • Average Distance: 56 meters
  • Duration: 3h 27m
  • Period: 2026-10-31T20:53:33+00:00 to 2026-11-01T00:20:36+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 54m, avg 56m) for 207 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 54m, avg 56m
Duration25/25Duration 207 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 54.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 56.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 1.6999999999999999555910790149937383830547332763671875,
    "duration_minutes": 207.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 12423,
    "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": "2026-10-31T20:53:33+00:00",
        "end": "2026-11-01T00:20:36+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 54m, avg 56m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 207 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM RANGER and YELLOW STARS) maintained close proximity (min 54m, avg 56m) for 207 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 20:14 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 8m
  • Data Points: 11 AIS positions
  • Period: 2026-10-31T20:14:36+00:00 to 2026-11-01T02:23:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 368.8999999999999772626324556767940521240234375,
    "points_in_zone": 11,
    "first_point": {
        "ts": "2026-10-31T20:14:36+00:00",
        "lat": 34.71013330000000252084646490402519702911376953125,
        "lon": 33.32258329999999801884769112803041934967041015625
    },
    "last_point": {
        "ts": "2026-11-01T02:23:33+00:00",
        "lat": 34.71013330000000252084646490402519702911376953125,
        "lon": 33.32265000000000298996383207850158214569091796875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 20:14 UTC 75.0% ▼
  • Duration: 6h 8m
  • Radius: 5 meters
  • Data Points: 11 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5,
    "duration_minutes": 368.8999999999999772626324556767940521240234375,
    "points": 11,
    "centroid": {
        "lat": 34.71011513636363332580003770999610424041748046875,
        "lon": 33.3226166636363672068910091184079647064208984375
    },
    "bbox": {
        "min_lat": 34.71008330000000086101863416843116283416748046875,
        "min_lon": 33.32258329999999801884769112803041934967041015625,
        "max_lat": 34.7101499999999987267074175179004669189453125,
        "max_lon": 33.3226666999999991958247846923768520355224609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 31, 2026 20:13 UTC 60/100 ▼
Vessel A: IMO 9363780 (TWINKLE STAR) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 325 meters
  • Average Distance: 326 meters
  • Duration: 42 minutes
  • Period: 2026-10-31T20:13:42+00:00 to 2026-10-31T20:55:48+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (TWINKLE STAR and CHEM RANGER) maintained close proximity (min 325m, avg 326m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 325m, avg 326m
Duration5/25Duration 42 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-31T21:30:01.548969+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005294,
        "imo": 9363780,
        "name": "TWINKLE STAR",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 324.80000000000001136868377216160297393798828125,
    "avg_distance_m": 325.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 1.3000000000000000444089209850062616169452667236328125,
    "duration_minutes": 42.10000000000000142108547152020037174224853515625,
    "overlap_duration_s": 2526,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T20:13:42+00:00",
        "end": "2026-10-31T20:55:48+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 325m, avg 326m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 42 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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (TWINKLE STAR and CHEM RANGER) maintained close proximity (min 325m, avg 326m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.709116399999999202918843366205692291259765625,
            "lon": 33.32127460000000240825102082453668117523193359375
        },
        "time_window": {
            "start_ts": "2026-10-31T20:13:42+00:00",
            "end_ts": "2026-10-31T20:55:48+00:00"
        },
        "searched_at": "2026-10-31T21:30:01.548969+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 19:44 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 24m
  • Data Points: 11 AIS positions
  • Period: 2026-10-31T19:44:34+00:00 to 2026-11-01T02:08:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 384,
    "points_in_zone": 11,
    "first_point": {
        "ts": "2026-10-31T19:44:34+00:00",
        "lat": 34.71013330000000252084646490402519702911376953125,
        "lon": 33.32258329999999801884769112803041934967041015625
    },
    "last_point": {
        "ts": "2026-11-01T02:08:33+00:00",
        "lat": 34.71008330000000086101863416843116283416748046875,
        "lon": 33.32258329999999801884769112803041934967041015625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 19:44 UTC 75.0% ▼
  • Duration: 6h 24m
  • Radius: 6 meters
  • Data Points: 11 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.5,
    "duration_minutes": 384,
    "points": 11,
    "centroid": {
        "lat": 34.71011513636364043122739531099796295166015625,
        "lon": 33.3226106000000044105036067776381969451904296875
    },
    "bbox": {
        "min_lat": 34.71008330000000086101863416843116283416748046875,
        "min_lon": 33.32258329999999801884769112803041934967041015625,
        "max_lat": 34.7101499999999987267074175179004669189453125,
        "max_lon": 33.3226666999999991958247846923768520355224609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 31, 2026 19:34 UTC 65/100 ▼
Vessel A: IMO 9973913 (NAVIG8 EXCEED) Singapore
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 322 meters
  • Average Distance: 325 meters
  • Duration: 48 minutes
  • Period: 2026-10-31T19:34:52+00:00 to 2026-10-31T20:22:56+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 325m) for 48 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 322m, avg 325m
Duration10/25Duration 48 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T01:30:08.420984+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563257500,
        "imo": 9973913,
        "name": "NAVIG8 EXCEED",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 321.69999999999998863131622783839702606201171875,
    "avg_distance_m": 324.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 4.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 48.10000000000000142108547152020037174224853515625,
    "overlap_duration_s": 2884,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T19:34:52+00:00",
        "end": "2026-10-31T20:22:56+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 322m, avg 325m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 48 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 325m) for 48 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70890539999999901965566095896065235137939453125,
            "lon": 33.3215890999999970745193422771990299224853515625
        },
        "time_window": {
            "start_ts": "2026-10-31T19:34:52+00:00",
            "end_ts": "2026-10-31T20:22:56+00:00"
        },
        "searched_at": "2026-11-01T01:30:08.420984+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 31, 2026 19:05 UTC 95/100 ▼
Vessel A: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 53 meters
  • Average Distance: 58 meters
  • Duration: 2h 48m
  • Period: 2026-10-31T19:05:56+00:00 to 2026-10-31T21:53:57+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 53m, avg 58m) for 168 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 53m, avg 58m
Duration25/25Duration 168 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-11-01T01:00:06.639546+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 53.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 57.60000000000000142108547152020037174224853515625,
    "distance_consistency_m": 2.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 168,
    "overlap_duration_s": 10081,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T19:05:56+00:00",
        "end": "2026-10-31T21:53:57+00:00"
    },
    "points_count": {
        "vessel_a": 10,
        "vessel_b": 10
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 53m, avg 58m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 168 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 53m, avg 58m) for 168 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70991490000000112559064291417598724365234375,
            "lon": 33.32278480000000087102307588793337345123291015625
        },
        "time_window": {
            "start_ts": "2026-10-31T19:05:56+00:00",
            "end_ts": "2026-10-31T21:53:57+00:00"
        },
        "searched_at": "2026-11-01T01:00:06.639546+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 31, 2026 18:44 UTC 75/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9973913 (NAVIG8 EXCEED) Singapore
  • Minimum Distance: 322 meters
  • Average Distance: 326 meters
  • Duration: 1h 41m
  • Period: 2026-10-31T18:44:33+00:00 to 2026-10-31T20:26:29+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (CHEM RANGER and NAVIG8 EXCEED) maintained close proximity (min 322m, avg 326m) for 102 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 322m, avg 326m
Duration20/25Duration 102 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-31T20:45:01.536816+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 563257500,
        "imo": 9973913,
        "name": "NAVIG8 EXCEED",
        "flag": "Singapore"
    },
    "min_distance_m": 321.69999999999998863131622783839702606201171875,
    "avg_distance_m": 326.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 3.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 101.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 6116,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T18:44:33+00:00",
        "end": "2026-10-31T20:26:29+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 322m, avg 326m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 102 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (CHEM RANGER and NAVIG8 EXCEED) maintained close proximity (min 322m, avg 326m) for 102 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7089114999999992505763657391071319580078125,
            "lon": 33.32159630000000305471985484473407268524169921875
        },
        "time_window": {
            "start_ts": "2026-10-31T18:44:33+00:00",
            "end_ts": "2026-10-31T20:26:29+00:00"
        },
        "searched_at": "2026-10-31T20:45:01.536816+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 31, 2026 18:11 UTC 80/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9363780 (TWINKLE STAR) MARSHALL ISLANDS
  • Minimum Distance: 325 meters
  • Average Distance: 328 meters
  • Duration: 2h 41m
  • Period: 2026-10-31T18:11:36+00:00 to 2026-10-31T20:53:33+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 325m, avg 328m) for 162 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 325m, avg 328m
Duration25/25Duration 162 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538005294,
        "imo": 9363780,
        "name": "TWINKLE STAR",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 324.80000000000001136868377216160297393798828125,
    "avg_distance_m": 328,
    "distance_consistency_m": 2.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 161.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 9717,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T18:11:36+00:00",
        "end": "2026-10-31T20:53:33+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 325m, avg 328m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 162 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 325m, avg 328m) for 162 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 31, 2026 18:11 UTC 95/100 ▼
Vessel A: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 53 meters
  • Average Distance: 58 meters
  • Duration: 3h 18m
  • Period: 2026-10-31T18:35:52+00:00 to 2026-10-31T21:53:57+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 53m, avg 58m) for 198 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 53m, avg 58m
Duration25/25Duration 198 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 53.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 57.60000000000000142108547152020037174224853515625,
    "distance_consistency_m": 2.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 198.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 11885,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T18:35:52+00:00",
        "end": "2026-10-31T21:53:57+00:00"
    },
    "points_count": {
        "vessel_a": 11,
        "vessel_b": 11
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 53m, avg 58m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 198 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 53m, avg 58m) for 198 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 18:11 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 21m
  • Data Points: 11 AIS positions
  • Period: 2026-10-31T18:59:32+00:00 to 2026-11-01T01:20:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 381,
    "points_in_zone": 11,
    "first_point": {
        "ts": "2026-10-31T18:59:32+00:00",
        "lat": 34.7100999999999970668795867823064327239990234375,
        "lon": 33.322616699999997535996953956782817840576171875
    },
    "last_point": {
        "ts": "2026-11-01T01:20:32+00:00",
        "lat": 34.71013330000000252084646490402519702911376953125,
        "lon": 33.3226666999999991958247846923768520355224609375
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 18:11 UTC 75.0% ▼
  • Duration: 6h 21m
  • Radius: 5 meters
  • Data Points: 11 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 381,
    "points": 11,
    "centroid": {
        "lat": 34.7101166545454589140717871487140655517578125,
        "lon": 33.3226136363636413761923904530704021453857421875
    },
    "bbox": {
        "min_lat": 34.71008330000000086101863416843116283416748046875,
        "min_lon": 33.32258329999999801884769112803041934967041015625,
        "max_lat": 34.7101499999999987267074175179004669189453125,
        "max_lon": 33.3226666999999991958247846923768520355224609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 31, 2026 17:26 UTC 95/100 ▼
Vessel A: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 53 meters
  • Average Distance: 58 meters
  • Duration: 4h 21m
  • Period: 2026-10-31T17:26:54+00:00 to 2026-10-31T21:47:56+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 53m, avg 58m) 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 53m, avg 58m
Duration25/25Duration 261 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±2m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 53.10000000000000142108547152020037174224853515625,
    "avg_distance_m": 57.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 2.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 261,
    "overlap_duration_s": 15662,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T17:26:54+00:00",
        "end": "2026-10-31T21:47:56+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 53m, avg 58m"
            },
            "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 \u00b12m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 53m, avg 58m) 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 31, 2026 17:22 UTC 80/100 ▼
Vessel A: IMO 9973913 (NAVIG8 EXCEED) Singapore
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 322 meters
  • Average Distance: 327 meters
  • Duration: 2h 59m
  • Period: 2026-10-31T17:22:59+00:00 to 2026-10-31T20:22:56+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 327m) for 180 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 322m, avg 327m
Duration25/25Duration 180 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-31T22:30:02.183889+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563257500,
        "imo": 9973913,
        "name": "NAVIG8 EXCEED",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 321.69999999999998863131622783839702606201171875,
    "avg_distance_m": 327,
    "distance_consistency_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 179.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 10797,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T17:22:59+00:00",
        "end": "2026-10-31T20:22:56+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 322m, avg 327m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 180 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 327m) for 180 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7089112999999969133568811230361461639404296875,
            "lon": 33.3216010000000011359588825143873691558837890625
        },
        "time_window": {
            "start_ts": "2026-10-31T17:22:59+00:00",
            "end_ts": "2026-10-31T20:22:56+00:00"
        },
        "searched_at": "2026-10-31T22:30:02.183889+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 17:14 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 4h 36m
  • Data Points: 13 AIS positions
  • Period: 2026-10-31T17:14:30+00:00 to 2026-10-31T21:50:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 276,
    "points_in_zone": 13,
    "first_point": {
        "ts": "2026-10-31T17:14:30+00:00",
        "lat": 34.710066699999998718340066261589527130126953125,
        "lon": 33.32260000000000133013600134290754795074462890625
    },
    "last_point": {
        "ts": "2026-10-31T21:50:32+00:00",
        "lat": 34.7101499999999987267074175179004669189453125,
        "lon": 33.32263329999999967867552186362445354461669921875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 17:14 UTC 75.0% ▼
  • Duration: 4h 36m
  • Radius: 6 meters
  • Data Points: 13 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 6.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 276,
    "points": 13,
    "centroid": {
        "lat": 34.71012179230769589821647969074547290802001953125,
        "lon": 33.3226038384615463883164920844137668609619140625
    },
    "bbox": {
        "min_lat": 34.710066699999998718340066261589527130126953125,
        "min_lon": 33.32258329999999801884769112803041934967041015625,
        "max_lat": 34.7101499999999987267074175179004669189453125,
        "max_lon": 33.32263329999999967867552186362445354461669921875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 31, 2026 16:41 UTC 65/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9363780 (TWINKLE STAR) MARSHALL ISLANDS
  • Minimum Distance: 324 meters
  • Average Distance: 327 meters
  • Duration: 45 minutes
  • Period: 2026-10-31T16:41:32+00:00 to 2026-10-31T17:26:30+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 324m, avg 327m) for 45 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 324m, avg 327m
Duration10/25Duration 45 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538005294,
        "imo": 9363780,
        "name": "TWINKLE STAR",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 323.8999999999999772626324556767940521240234375,
    "avg_distance_m": 327.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 3.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 45,
    "overlap_duration_s": 2698,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T16:41:32+00:00",
        "end": "2026-10-31T17:26:30+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 324m, avg 327m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 45 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 324m, avg 327m) for 45 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 31, 2026 16:02 UTC 80/100 ▼
Vessel A: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 51 meters
  • Average Distance: 56 meters
  • Duration: 45 minutes
  • Period: 2026-10-31T16:05:52+00:00 to 2026-10-31T16:50:59+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 51m, avg 56m) for 45 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 51m, avg 56m
Duration10/25Duration 45 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 51.39999999999999857891452847979962825775146484375,
    "avg_distance_m": 55.7000000000000028421709430404007434844970703125,
    "distance_consistency_m": 3.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 45.10000000000000142108547152020037174224853515625,
    "overlap_duration_s": 2707,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T16:05:52+00:00",
        "end": "2026-10-31T16:50:59+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 51m, avg 56m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 45 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 51m, avg 56m) for 45 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 16:02 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 5h 48m
  • Data Points: 16 AIS positions
  • Period: 2026-10-31T16:02:29+00:00 to 2026-10-31T21:50:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 348.1000000000000227373675443232059478759765625,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-10-31T16:02:29+00:00",
        "lat": 34.7101167000000003781678969971835613250732421875,
        "lon": 33.32258329999999801884769112803041934967041015625
    },
    "last_point": {
        "ts": "2026-10-31T21:50:32+00:00",
        "lat": 34.7101499999999987267074175179004669189453125,
        "lon": 33.32263329999999967867552186362445354461669921875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 16:02 UTC 75.0% ▼
  • Duration: 5h 48m
  • Radius: 6 meters
  • Data Points: 16 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 5.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 348.1000000000000227373675443232059478759765625,
    "points": 16,
    "centroid": {
        "lat": 34.71011978749999826732164365239441394805908203125,
        "lon": 33.32260311875000269310476141981780529022216796875
    },
    "bbox": {
        "min_lat": 34.710066699999998718340066261589527130126953125,
        "min_lon": 33.32258329999999801884769112803041934967041015625,
        "max_lat": 34.7101499999999987267074175179004669189453125,
        "max_lon": 33.32263329999999967867552186362445354461669921875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 31, 2026 15:59 UTC 80/100 ▼
Vessel A: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 51 meters
  • Average Distance: 57 meters
  • Duration: 51 minutes
  • Period: 2026-10-31T15:59:52+00:00 to 2026-10-31T16:50:59+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 51m, avg 57m) for 51 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 51m, avg 57m
Duration10/25Duration 51 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±4m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-31T18:15:05.431616+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 51.39999999999999857891452847979962825775146484375,
    "avg_distance_m": 56.60000000000000142108547152020037174224853515625,
    "distance_consistency_m": 3.899999999999999911182158029987476766109466552734375,
    "duration_minutes": 51.10000000000000142108547152020037174224853515625,
    "overlap_duration_s": 3067,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T15:59:52+00:00",
        "end": "2026-10-31T16:50:59+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 51m, avg 57m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 51 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b14m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 51m, avg 57m) for 51 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.70990470000000271966200671158730983734130859375,
            "lon": 33.32278819999999797119016875512897968292236328125
        },
        "time_window": {
            "start_ts": "2026-10-31T15:59:52+00:00",
            "end_ts": "2026-10-31T16:50:59+00:00"
        },
        "searched_at": "2026-10-31T18:15:05.431616+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 31, 2026 15:46 UTC 70/100 ▼
Vessel A: IMO 9363780 (TWINKLE STAR) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 327 meters
  • Average Distance: 328 meters
  • Duration: 1 hours
  • Period: 2026-10-31T15:46:40+00:00 to 2026-10-31T16:46:47+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (TWINKLE STAR and CHEM RANGER) maintained close proximity (min 327m, avg 328m) for 60 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 327m, avg 328m
Duration15/25Duration 60 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538005294,
        "imo": 9363780,
        "name": "TWINKLE STAR",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 326.6000000000000227373675443232059478759765625,
    "avg_distance_m": 328.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 3,
    "duration_minutes": 60.10000000000000142108547152020037174224853515625,
    "overlap_duration_s": 3607,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T15:46:40+00:00",
        "end": "2026-10-31T16:46:47+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 327m, avg 328m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 60 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (TWINKLE STAR and CHEM RANGER) maintained close proximity (min 327m, avg 328m) for 60 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 15:23 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 26m
  • Data Points: 20 AIS positions
  • Period: 2026-10-31T15:23:35+00:00 to 2026-10-31T21:50:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 386.8999999999999772626324556767940521240234375,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-10-31T15:23:35+00:00",
        "lat": 34.7101499999999987267074175179004669189453125,
        "lon": 33.32258329999999801884769112803041934967041015625
    },
    "last_point": {
        "ts": "2026-10-31T21:50:32+00:00",
        "lat": 34.7101499999999987267074175179004669189453125,
        "lon": 33.32263329999999967867552186362445354461669921875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 15:23 UTC 75.0% ▼
  • Duration: 6h 26m
  • Radius: 7 meters
  • Data Points: 20 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 6.5,
    "duration_minutes": 386.8999999999999772626324556767940521240234375,
    "points": 20,
    "centroid": {
        "lat": 34.71012500000000500222085975110530853271484375,
        "lon": 33.32260166000001078145942301489412784576416015625
    },
    "bbox": {
        "min_lat": 34.710066699999998718340066261589527130126953125,
        "min_lon": 33.32258329999999801884769112803041934967041015625,
        "max_lat": 34.71016670000000203799572773277759552001953125,
        "max_lon": 33.32263329999999967867552186362445354461669921875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 31, 2026 15:16 UTC 80/100 ▼
Vessel A: IMO 9973913 (NAVIG8 EXCEED) Singapore
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 322 meters
  • Average Distance: 327 meters
  • Duration: 5h 6m
  • Period: 2026-10-31T15:16:54+00:00 to 2026-10-31T20:22:56+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 327m) 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 Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 322m, avg 327m
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: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-31T21:00:01.439938+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563257500,
        "imo": 9973913,
        "name": "NAVIG8 EXCEED",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 321.69999999999998863131622783839702606201171875,
    "avg_distance_m": 327.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 3,
    "duration_minutes": 306,
    "overlap_duration_s": 18362,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T15:16:54+00:00",
        "end": "2026-10-31T20:22:56+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 322m, avg 327m"
            },
            "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: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 322m, avg 327m) 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 Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.708912499999996725819073617458343505859375,
            "lon": 33.32160069999999763012965559028089046478271484375
        },
        "time_window": {
            "start_ts": "2026-10-31T15:16:54+00:00",
            "end_ts": "2026-10-31T20:22:56+00:00"
        },
        "searched_at": "2026-10-31T21:00:01.439938+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Northern Baltic Sea Surveillance Zone
Oct 31, 2026 14:23 UTC 80/100 ▼
Vessel A: IMO 9973913 (NAVIG8 EXCEED) Singapore
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 318 meters
  • Average Distance: 326 meters
  • Duration: 3h 15m
  • Period: 2026-10-31T14:19:53+00:00 to 2026-10-31T17:34:56+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 80/100

High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 318m, avg 326m) for 195 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 318m, avg 326m
Duration25/25Duration 195 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±6m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 563257500,
        "imo": 9973913,
        "name": "NAVIG8 EXCEED",
        "flag": "Singapore"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 317.5,
    "avg_distance_m": 325.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 5.5,
    "duration_minutes": 195.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 11703,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T14:19:53+00:00",
        "end": "2026-10-31T17:34:56+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 80,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 318m, avg 326m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 195 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b16m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (NAVIG8 EXCEED and CHEM RANGER) maintained close proximity (min 318m, avg 326m) for 195 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 14:05 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 19 AIS positions
  • Period: 2026-10-31T14:23:34+00:00 to 2026-10-31T20:53:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 19,
    "first_point": {
        "ts": "2026-10-31T14:23:34+00:00",
        "lat": 34.71005000000000251247911364771425724029541015625,
        "lon": 33.32260000000000133013600134290754795074462890625
    },
    "last_point": {
        "ts": "2026-10-31T20:53:33+00:00",
        "lat": 34.7100999999999970668795867823064327239990234375,
        "lon": 33.32258329999999801884769112803041934967041015625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 14:05 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 8 meters
  • Data Points: 19 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 7.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 390,
    "points": 19,
    "centroid": {
        "lat": 34.71012017368420998764122487045824527740478515625,
        "lon": 33.32259999473685496695907204411923885345458984375
    },
    "bbox": {
        "min_lat": 34.71005000000000251247911364771425724029541015625,
        "min_lon": 33.32258329999999801884769112803041934967041015625,
        "max_lat": 34.71016670000000203799572773277759552001953125,
        "max_lon": 33.32263329999999967867552186362445354461669921875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 31, 2026 13:50 UTC 60/100 ▼
Vessel A: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
Vessel B: IMO 9363780 (TWINKLE STAR) MARSHALL ISLANDS
  • Minimum Distance: 323 meters
  • Average Distance: 327 meters
  • Duration: 33 minutes
  • Period: 2026-10-31T13:50:33+00:00 to 2026-10-31T14:23:34+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 323m, avg 327m) for 33 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness10/25Min distance 323m, avg 327m
Duration5/25Duration 33 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-31T15:30:06.126959+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538005294,
        "imo": 9363780,
        "name": "TWINKLE STAR",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 322.69999999999998863131622783839702606201171875,
    "avg_distance_m": 326.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 33,
    "overlap_duration_s": 1981,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-10-31T13:50:33+00:00",
        "end": "2026-10-31T14:23:34+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 10,
                "max": 25,
                "detail": "Min distance 323m, avg 327m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 33 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (CHEM RANGER and TWINKLE STAR) maintained close proximity (min 323m, avg 327m) for 33 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.709102500000000190993887372314929962158203125,
            "lon": 33.3212874999999968395059113390743732452392578125
        },
        "time_window": {
            "start_ts": "2026-10-31T13:50:33+00:00",
            "end_ts": "2026-10-31T14:23:34+00:00"
        },
        "searched_at": "2026-10-31T15:30:06.126959+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Northern Baltic Sea Surveillance Zone
Oct 31, 2026 13:17 UTC 64/100 ▼
Vessel A: IMO 9913626 (YELLOW STARS) MARSHALL ISLANDS
Vessel B: IMO 9490296 (CHEM RANGER) MARSHALL ISLANDS
  • Minimum Distance: 53 meters
  • Average Distance: 160 meters
  • Duration: 1h 9m
  • Period: 2026-10-31T13:17:51+00:00 to 2026-10-31T14:26:51+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.7 knots
  • Zone: Northern Baltic Sea Surveillance Zone

Confidence Analysis

Score: 64/100

Moderate-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 53m, avg 160m) for 69 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.7 knots). Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 53m, avg 160m
Duration15/25Duration 69 minutes
Speed Stability12/20both very slow; somewhat variable speeds
Distance Consistency2/15Distance variance ±151m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Northern Baltic Sea Surveillance Zone

🛰️ Satellite Corroboration

✗ SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-10-31T16:00:09.312575+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 538009099,
        "imo": 9913626,
        "name": "YELLOW STARS",
        "flag": "MARSHALL ISLANDS"
    },
    "vessel_b": {
        "mmsi": 538004628,
        "imo": 9490296,
        "name": "CHEM RANGER",
        "flag": "MARSHALL ISLANDS"
    },
    "min_distance_m": 52.7999999999999971578290569595992565155029296875,
    "avg_distance_m": 159.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 151.099999999999994315658113919198513031005859375,
    "duration_minutes": 69,
    "overlap_duration_s": 4140,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.6999999999999999555910790149937383830547332763671875,
    "speed_b_std": 0.9899999999999999911182158029987476766109466552734375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.6999999999999999555910790149937383830547332763671875,
            "max_sog": 1.399999999999999911182158029987476766109466552734375
        }
    },
    "time_window": {
        "start": "2026-10-31T13:17:51+00:00",
        "end": "2026-10-31T14:26:51+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "score": {
        "value": 64,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 53m, avg 160m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 69 minutes"
            },
            "speed_stability": {
                "score": 12,
                "max": 20,
                "detail": "both very slow; somewhat variable speeds"
            },
            "distance_consistency": {
                "score": 2,
                "max": 15,
                "detail": "Distance variance \u00b1151m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Northern Baltic Sea Surveillance Zone"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (YELLOW STARS and CHEM RANGER) maintained close proximity (min 53m, avg 160m) for 69 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.7 knots). Event occurred in Northern Baltic Sea Surveillance Zone, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 34.7102900000000005320544005371630191802978515625,
            "lon": 33.32328129999999788424247526563704013824462890625
        },
        "time_window": {
            "start_ts": "2026-10-31T13:17:51+00:00",
            "end_ts": "2026-10-31T14:26:51+00:00"
        },
        "searched_at": "2026-10-31T16:00:09.312575+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 13:13 UTC 75.0% ▼
  • Duration: 6h 35m
  • Radius: 8 meters
  • Data Points: 20 AIS positions
  • Centroid: 34.7101, 33.3226
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 7.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 395.8999999999999772626324556767940521240234375,
    "points": 20,
    "centroid": {
        "lat": 34.710119165000008933930075727403163909912109375,
        "lon": 33.3226033300000068493318394757807254791259765625
    },
    "bbox": {
        "min_lat": 34.71005000000000251247911364771425724029541015625,
        "min_lon": 33.32258329999999801884769112803041934967041015625,
        "max_lat": 34.71016670000000203799572773277759552001953125,
        "max_lon": 33.32263329999999967867552186362445354461669921875
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 13:05 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 35m
  • Data Points: 20 AIS positions
  • Period: 2026-10-31T13:50:33+00:00 to 2026-10-31T20:26:29+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 395.8999999999999772626324556767940521240234375,
    "points_in_zone": 20,
    "first_point": {
        "ts": "2026-10-31T13:50:33+00:00",
        "lat": 34.7100999999999970668795867823064327239990234375,
        "lon": 33.322616699999997535996953956782817840576171875
    },
    "last_point": {
        "ts": "2026-10-31T20:26:29+00:00",
        "lat": 34.7100999999999970668795867823064327239990234375,
        "lon": 33.32258329999999801884769112803041934967041015625
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 12:01 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 34m
  • Data Points: 26 AIS positions
  • Period: 2026-10-31T12:25:13+00:00 to 2026-10-31T18:59:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 394.30000000000001136868377216160297393798828125,
    "points_in_zone": 26,
    "first_point": {
        "ts": "2026-10-31T12:25:13+00:00",
        "lat": 34.68953330000000079280653153546154499053955078125,
        "lon": 33.3357333000000011224983609281480312347412109375
    },
    "last_point": {
        "ts": "2026-10-31T18:59:32+00:00",
        "lat": 34.7100999999999970668795867823064327239990234375,
        "lon": 33.322616699999997535996953956782817840576171875
    }
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 11:16 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 34m
  • Data Points: 30 AIS positions
  • Period: 2026-10-31T11:40:11+00:00 to 2026-10-31T18:14:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 394.3999999999999772626324556767940521240234375,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-10-31T11:40:11+00:00",
        "lat": 34.69003330000000318023012368939816951751708984375,
        "lon": 33.33541670000000323170752380974590778350830078125
    },
    "last_point": {
        "ts": "2026-10-31T18:14:33+00:00",
        "lat": 34.71013330000000252084646490402519702911376953125,
        "lon": 33.322616699999997535996953956782817840576171875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 11:16 UTC 75.0% ▼
  • Duration: 1h 49m
  • Radius: 807 meters
  • Data Points: 13 AIS positions
  • Centroid: 34.6903, 33.3349
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 807.200000000000045474735088646411895751953125,
    "duration_minutes": 109.5,
    "points": 13,
    "centroid": {
        "lat": 34.690270507692304136071470566093921661376953125,
        "lon": 33.3349128153846123723269556649029254913330078125
    },
    "bbox": {
        "min_lat": 34.689383300000002918750396929681301116943359375,
        "min_lon": 33.32804999999999751025825389660894870758056640625,
        "max_lat": 34.694833299999999098872649483382701873779296875,
        "max_lon": 33.33611669999999804758772370405495166778564453125
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 10:31 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 34m
  • Data Points: 31 AIS positions
  • Period: 2026-10-31T10:52:11+00:00 to 2026-10-31T17:26:30+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 394.30000000000001136868377216160297393798828125,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-10-31T10:52:11+00:00",
        "lat": 34.689916699999997717895894311368465423583984375,
        "lon": 33.33558330000000324844222632236778736114501953125
    },
    "last_point": {
        "ts": "2026-10-31T17:26:30+00:00",
        "lat": 34.7101499999999987267074175179004669189453125,
        "lon": 33.322616699999997535996953956782817840576171875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 10:31 UTC 75.0% ▼
  • Duration: 2h 34m
  • Radius: 821 meters
  • Data Points: 16 AIS positions
  • Centroid: 34.6902, 33.3350
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 821.1000000000000227373675443232059478759765625,
    "duration_minutes": 154.5,
    "points": 16,
    "centroid": {
        "lat": 34.69020208124999982146619004197418689727783203125,
        "lon": 33.33504061874999280234987963922321796417236328125
    },
    "bbox": {
        "min_lat": 34.689383300000002918750396929681301116943359375,
        "min_lon": 33.32804999999999751025825389660894870758056640625,
        "max_lat": 34.694833299999999098872649483382701873779296875,
        "max_lon": 33.33611669999999804758772370405495166778564453125
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 09:04 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 22m
  • Data Points: 31 AIS positions
  • Period: 2026-10-31T09:58:11+00:00 to 2026-10-31T16:20:32+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 382.3999999999999772626324556767940521240234375,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-10-31T09:58:11+00:00",
        "lat": 34.68998330000000152040229295380413532257080078125,
        "lon": 33.33566669999999731999196228571236133575439453125
    },
    "last_point": {
        "ts": "2026-10-31T16:20:32+00:00",
        "lat": 34.71013330000000252084646490402519702911376953125,
        "lon": 33.32260000000000133013600134290754795074462890625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 09:04 UTC 75.0% ▼
  • Duration: 4h 1m
  • Radius: 853 meters
  • Data Points: 23 AIS positions
  • Centroid: 34.6900, 33.3353
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 852.799999999999954525264911353588104248046875,
    "duration_minutes": 241.5,
    "points": 23,
    "centroid": {
        "lat": 34.69001376956521909278308157809078693389892578125,
        "lon": 33.33530144782609028197839506901800632476806640625
    },
    "bbox": {
        "min_lat": 34.6893333000000012589225661940872669219970703125,
        "min_lon": 33.32804999999999751025825389660894870758056640625,
        "max_lat": 34.694833299999999098872649483382701873779296875,
        "max_lon": 33.33611669999999804758772370405495166778564453125
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 08:07 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 31m
  • Data Points: 33 AIS positions
  • Period: 2026-10-31T08:52:11+00:00 to 2026-10-31T15:23:35+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 391.3999999999999772626324556767940521240234375,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-10-31T08:52:11+00:00",
        "lat": 34.68926669999999745641616755165159702301025390625,
        "lon": 33.336133300000000190266291610896587371826171875
    },
    "last_point": {
        "ts": "2026-10-31T15:23:35+00:00",
        "lat": 34.7101499999999987267074175179004669189453125,
        "lon": 33.32258329999999801884769112803041934967041015625
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 08:07 UTC 75.0% ▼
  • Duration: 4h 58m
  • Radius: 874 meters
  • Data Points: 28 AIS positions
  • Centroid: 34.6899, 33.3355
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 873.6000000000000227373675443232059478759765625,
    "duration_minutes": 298.5,
    "points": 28,
    "centroid": {
        "lat": 34.68987083571429508310757228173315525054931640625,
        "lon": 33.335452378571432063836255110800266265869140625
    },
    "bbox": {
        "min_lat": 34.6891166999999995823600329458713531494140625,
        "min_lon": 33.32804999999999751025825389660894870758056640625,
        "max_lat": 34.694833299999999098872649483382701873779296875,
        "max_lon": 33.3361833000000018500941223464906215667724609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 07:16 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 25m
  • Data Points: 37 AIS positions
  • Period: 2026-10-31T07:40:11+00:00 to 2026-10-31T14:05:33+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 385.3999999999999772626324556767940521240234375,
    "points_in_zone": 37,
    "first_point": {
        "ts": "2026-10-31T07:40:11+00:00",
        "lat": 34.6891166999999995823600329458713531494140625,
        "lon": 33.33616669999999970741555443964898586273193359375
    },
    "last_point": {
        "ts": "2026-10-31T14:05:33+00:00",
        "lat": 34.7100999999999970668795867823064327239990234375,
        "lon": 33.32263329999999967867552186362445354461669921875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 07:16 UTC 75.0% ▼
  • Duration: 5h 49m
  • Radius: 884 meters
  • Data Points: 31 AIS positions
  • Centroid: 34.6898, 33.3355
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 884.299999999999954525264911353588104248046875,
    "duration_minutes": 349.6000000000000227373675443232059478759765625,
    "points": 31,
    "centroid": {
        "lat": 34.68978817419355209494824521243572235107421875,
        "lon": 33.3355215032258200835713068954646587371826171875
    },
    "bbox": {
        "min_lat": 34.68883329999999887149897404015064239501953125,
        "min_lon": 33.32804999999999751025825389660894870758056640625,
        "max_lat": 34.694833299999999098872649483382701873779296875,
        "max_lon": 33.3361833000000018500941223464906215667724609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 06:10 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 30m
  • Data Points: 31 AIS positions
  • Period: 2026-10-31T06:25:12+00:00 to 2026-10-31T12:55:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 390,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-10-31T06:25:12+00:00",
        "lat": 34.6882499999999964757080306299030780792236328125,
        "lon": 33.33593330000000065638232626952230930328369140625
    },
    "last_point": {
        "ts": "2026-10-31T12:55:11+00:00",
        "lat": 34.689383300000002918750396929681301116943359375,
        "lon": 33.334333299999997279883245937526226043701171875
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 06:10 UTC 75.0% ▼
  • Duration: 6h 30m
  • Radius: 148 meters
  • Data Points: 31 AIS positions
  • Centroid: 34.6896, 33.3358
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 147.80000000000001136868377216160297393798828125,
    "duration_minutes": 390,
    "points": 31,
    "centroid": {
        "lat": 34.68957580967741449740060488693416118621826171875,
        "lon": 33.33577580322580757865580380894243717193603515625
    },
    "bbox": {
        "min_lat": 34.6882499999999964757080306299030780792236328125,
        "min_lon": 33.334333299999997279883245937526226043701171875,
        "max_lat": 34.690100000000001045918907038867473602294921875,
        "max_lon": 33.3361833000000018500941223464906215667724609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 05:01 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 15m
  • Data Points: 30 AIS positions
  • Period: 2026-10-31T05:46:14+00:00 to 2026-10-31T12:01:14+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 375,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-10-31T05:46:14+00:00",
        "lat": 34.688033300000000735963112674653530120849609375,
        "lon": 33.33581670000000229947545449249446392059326171875
    },
    "last_point": {
        "ts": "2026-10-31T12:01:14+00:00",
        "lat": 34.6900167000000010375515557825565338134765625,
        "lon": 33.3356332999999978028426994569599628448486328125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 05:01 UTC 75.0% ▼
  • Duration: 6h 15m
  • Radius: 162 meters
  • Data Points: 30 AIS positions
  • Centroid: 34.6895, 33.3358
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 161.69999999999998863131622783839702606201171875,
    "duration_minutes": 375,
    "points": 30,
    "centroid": {
        "lat": 34.6894911166666730650831595994532108306884765625,
        "lon": 33.33581944333334234897847636602818965911865234375
    },
    "bbox": {
        "min_lat": 34.688033300000000735963112674653530120849609375,
        "min_lon": 33.33538329999999660913090337999165058135986328125,
        "max_lat": 34.690100000000001045918907038867473602294921875,
        "max_lon": 33.3361833000000018500941223464906215667724609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 04:19 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 39m
  • Data Points: 32 AIS positions
  • Period: 2026-10-31T04:40:10+00:00 to 2026-10-31T11:19:13+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 399.1000000000000227373675443232059478759765625,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-10-31T04:40:10+00:00",
        "lat": 34.68806670000000025311237550340592861175537109375,
        "lon": 33.33576670000000063964762375690042972564697265625
    },
    "last_point": {
        "ts": "2026-10-31T11:19:13+00:00",
        "lat": 34.690100000000001045918907038867473602294921875,
        "lon": 33.33541670000000323170752380974590778350830078125
    }
}
Methodology: 2026.01.18
Loiter Northern Baltic Sea Surveillance Zone
Oct 31, 2026 04:19 UTC 75.0% ▼
  • Duration: 6h 39m
  • Radius: 132 meters
  • Data Points: 32 AIS positions
  • Centroid: 34.6890, 33.3359
  • Zone: Northern Baltic Sea Surveillance Zone
Show Raw Evidence JSON
{
    "radius_m": 131.599999999999994315658113919198513031005859375,
    "duration_minutes": 399.1000000000000227373675443232059478759765625,
    "points": 32,
    "centroid": {
        "lat": 34.68897969062499697656676289625465869903564453125,
        "lon": 33.33588958437500338050085701979696750640869140625
    },
    "bbox": {
        "min_lat": 34.688033300000000735963112674653530120849609375,
        "min_lon": 33.33541670000000323170752380974590778350830078125,
        "max_lat": 34.690100000000001045918907038867473602294921875,
        "max_lon": 33.3361833000000018500941223464906215667724609375
    },
    "zone_id": "discovered_039"
}
Methodology: 2026.01.18
Zone Dwell Northern Baltic Sea Surveillance Zone
Oct 31, 2026 03:04 UTC 80.0% ▼
  • Zone: Northern Baltic Sea Surveillance Zone
  • Duration: 6h 33m
  • Data Points: 32 AIS positions
  • Period: 2026-10-31T03:25:12+00:00 to 2026-10-31T09:58:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "discovered_039",
    "zone_name": "Northern Baltic Sea Surveillance Zone",
    "dwell_minutes": 393,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-10-31T03:25:12+00:00",
        "lat": 34.68793329999999741630745120346546173095703125,
        "lon": 33.33561670000000276559148915112018585205078125
    },
    "last_point": {
        "ts": "2026-10-31T09:58:11+00:00",
        "lat": 34.68998330000000152040229295380413532257080078125,
        "lon": 33.33566669999999731999196228571236133575439453125
    }
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Nov 1 14:17 34.7101 33.3226 0.0 kn 107.0° Northern Baltic Sea Surveillance Zone
Nov 1 13:35 34.7101 33.3226 0.0 kn 318.0° Northern Baltic Sea Surveillance Zone
Nov 1 13:32 34.7101 33.3226 0.0 kn 318.0° Northern Baltic Sea Surveillance Zone
Nov 1 13:26 34.7101 33.3226 0.0 kn 313.0° Northern Baltic Sea Surveillance Zone
Nov 1 13:17 34.7101 33.3226 0.0 kn 166.0° Northern Baltic Sea Surveillance Zone
Nov 1 13:14 34.7101 33.3226 0.0 kn 166.0° Northern Baltic Sea Surveillance Zone
Nov 1 13:08 34.7101 33.3227 0.0 kn 166.0° Northern Baltic Sea Surveillance Zone
Nov 1 12:05 34.7101 33.3226 0.0 kn 20.0° Northern Baltic Sea Surveillance Zone
Nov 1 11:56 34.7102 33.3226 0.0 kn 201.0° Northern Baltic Sea Surveillance Zone
Nov 1 11:38 34.7101 33.3226 0.0 kn 335.0° Northern Baltic Sea Surveillance Zone
Nov 1 11:11 34.7101 33.3226 0.0 kn 335.0° Northern Baltic Sea Surveillance Zone
Nov 1 11:08 34.7101 33.3226 0.0 kn 335.0° Northern Baltic Sea Surveillance Zone
Nov 1 11:05 34.7101 33.3226 0.0 kn 335.0° Northern Baltic Sea Surveillance Zone
Nov 1 10:38 34.7102 33.3226 0.0 kn 245.0° Northern Baltic Sea Surveillance Zone
Nov 1 10:26 34.7101 33.3226 0.0 kn 234.0° Northern Baltic Sea Surveillance Zone
Nov 1 10:17 34.7101 33.3226 0.0 kn 234.0° Northern Baltic Sea Surveillance Zone
Nov 1 10:05 34.7101 33.3226 0.0 kn 234.0° Northern Baltic Sea Surveillance Zone
Nov 1 09:53 34.7101 33.3226 0.0 kn 229.0° Northern Baltic Sea Surveillance Zone
Nov 1 09:41 34.7101 33.3226 0.0 kn 229.0° Northern Baltic Sea Surveillance Zone
Nov 1 09:32 34.7101 33.3226 0.0 kn 229.0° Northern Baltic Sea 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.