SAMANYOLU

IMO 9359569

Vessel information

Vessel Name SAMANYOLU
IMO Number 9359569
MMSI 511101642
Vessel Type Tanker
Flag 🇵🇼 PALAU
Call Sign T8A513
Length 94 m
Beam 18 m

Detected Events (100)

Zone Dwell Bosphorus/Dardanelles Approach
Jul 22, 2026 20:09 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 1h 10m
  • Data Points: 3 AIS positions
  • Period: 2026-07-22T20:09:43+00:00 to 2026-07-22T21:19:57+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 70.2000000000000028421709430404007434844970703125,
    "points_in_zone": 3,
    "first_point": {
        "ts": "2026-07-22T20:09:43+00:00",
        "lat": 40.69852499999999650981408194638788700103759765625,
        "lon": 28.67334170000000170830389834009110927581787109375
    },
    "last_point": {
        "ts": "2026-07-22T21:19:57+00:00",
        "lat": 40.73288670000000166737663676030933856964111328125,
        "lon": 28.684813299999998292832970037125051021575927734375
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 22, 2026 07:04 UTC 75.0%
  • Duration: 1h 33m
  • Radius: 815 meters
  • Data Points: 37 AIS positions
  • Centroid: 40.7342, 28.6727
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 815.200000000000045474735088646411895751953125,
    "duration_minutes": 93.400000000000005684341886080801486968994140625,
    "points": 37,
    "centroid": {
        "lat": 40.73423400540539063285905285738408565521240234375,
        "lon": 28.672747797297301275420977617613971233367919921875
    },
    "bbox": {
        "min_lat": 40.727069999999997662598616443574428558349609375,
        "min_lon": 28.670643299999998276916812756098806858062744140625,
        "max_lat": 40.74053500000000127556631923653185367584228515625,
        "max_lon": 28.675308300000001082707967725582420825958251953125
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 22, 2026 07:00 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 1h 37m
  • Data Points: 38 AIS positions
  • Period: 2026-07-22T07:00:04+00:00 to 2026-07-22T08:37:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 97.2999999999999971578290569595992565155029296875,
    "points_in_zone": 38,
    "first_point": {
        "ts": "2026-07-22T07:00:04+00:00",
        "lat": 40.74111500000000063437255448661744594573974609375,
        "lon": 28.675619999999998555040292558260262012481689453125
    },
    "last_point": {
        "ts": "2026-07-22T08:37:25+00:00",
        "lat": 40.727069999999997662598616443574428558349609375,
        "lon": 28.670643299999998276916812756098806858062744140625
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 22, 2026 06:00 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 2h 37m
  • Data Points: 59 AIS positions
  • Period: 2026-07-22T06:00:25+00:00 to 2026-07-22T08:37:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 157,
    "points_in_zone": 59,
    "first_point": {
        "ts": "2026-07-22T06:00:25+00:00",
        "lat": 40.749809999999996534825186245143413543701171875,
        "lon": 28.680538299999998486100594163872301578521728515625
    },
    "last_point": {
        "ts": "2026-07-22T08:37:25+00:00",
        "lat": 40.727069999999997662598616443574428558349609375,
        "lon": 28.670643299999998276916812756098806858062744140625
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 22, 2026 06:00 UTC 75.0%
  • Duration: 2h 17m
  • Radius: 1,216 meters
  • Data Points: 51 AIS positions
  • Centroid: 40.7370, 28.6740
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 1216.09999999999990905052982270717620849609375,
    "duration_minutes": 137.19999999999998863131622783839702606201171875,
    "points": 51,
    "centroid": {
        "lat": 40.73702457450979608211127924732863903045654296875,
        "lon": 28.67397758431371812548604793846607208251953125
    },
    "bbox": {
        "min_lat": 40.727069999999997662598616443574428558349609375,
        "min_lon": 28.670643299999998276916812756098806858062744140625,
        "max_lat": 40.7473667000000006055415724404156208038330078125,
        "max_lon": 28.678713299999998298517311923205852508544921875
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 22, 2026 05:06 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 3h 31m
  • Data Points: 77 AIS positions
  • Period: 2026-07-22T05:06:06+00:00 to 2026-07-22T08:37:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 211.30000000000001136868377216160297393798828125,
    "points_in_zone": 77,
    "first_point": {
        "ts": "2026-07-22T05:06:06+00:00",
        "lat": 40.75785830000000231621015700511634349822998046875,
        "lon": 28.687155000000000626414475846104323863983154296875
    },
    "last_point": {
        "ts": "2026-07-22T08:37:25+00:00",
        "lat": 40.727069999999997662598616443574428558349609375,
        "lon": 28.670643299999998276916812756098806858062744140625
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 22, 2026 05:06 UTC 75.0%
  • Duration: 2h 24m
  • Radius: 1,245 meters
  • Data Points: 54 AIS positions
  • Centroid: 40.7408, 28.6757
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 1244.700000000000045474735088646411895751953125,
    "duration_minutes": 144.19999999999998863131622783839702606201171875,
    "points": 54,
    "centroid": {
        "lat": 40.74075898148146990251916577108204364776611328125,
        "lon": 28.675672133333332425308981328271329402923583984375
    },
    "bbox": {
        "min_lat": 40.73066000000000030922819860279560089111328125,
        "min_lon": 28.671508299999999280771589837968349456787109375,
        "max_lat": 40.7509950000000031877789297141134738922119140625,
        "max_lon": 28.681676700000000579393599764443933963775634765625
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 22, 2026 04:48 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 3h 49m
  • Data Points: 81 AIS positions
  • Period: 2026-07-22T04:48:06+00:00 to 2026-07-22T08:37:25+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 229.30000000000001136868377216160297393798828125,
    "points_in_zone": 81,
    "first_point": {
        "ts": "2026-07-22T04:48:06+00:00",
        "lat": 40.76100999999999885403667576611042022705078125,
        "lon": 28.689260000000000871978045324794948101043701171875
    },
    "last_point": {
        "ts": "2026-07-22T08:37:25+00:00",
        "lat": 40.727069999999997662598616443574428558349609375,
        "lon": 28.670643299999998276916812756098806858062744140625
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 22, 2026 04:48 UTC 75.0%
  • Duration: 2h 13m
  • Radius: 1,351 meters
  • Data Points: 44 AIS positions
  • Centroid: 40.7500, 28.6811
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 1351.09999999999990905052982270717620849609375,
    "duration_minutes": 133.900000000000005684341886080801486968994140625,
    "points": 44,
    "centroid": {
        "lat": 40.75001276363635582811184576712548732757568359375,
        "lon": 28.681149545454548643874659319408237934112548828125
    },
    "bbox": {
        "min_lat": 40.74053500000000127556631923653185367584228515625,
        "min_lon": 28.675308300000001082707967725582420825958251953125,
        "max_lat": 40.76061829999999730489435023628175258636474609375,
        "max_lon": 28.688990000000000435420588473789393901824951171875
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts🛰️? Bosphorus/Dardanelles Approach
Jul 19, 2026 23:04 UTC 60/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9221803 (YARA J) COMOROS
  • Minimum Distance: 444 meters
  • Average Distance: 450 meters
  • Duration: 56 minutes
  • Period: 2026-07-19T23:04:47+00:00 to 2026-07-20T00:00:48+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 444m, avg 450m) for 56 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 444m, avg 450m
Duration10/25Duration 56 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±5m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1D_IW_GRDH_1SDV_20260720T041345_20260720T041410_003752_006BAD_2476_COG • Acquired: 2026-07-20T04:13:45.759758Z • Platform: sentinel-1d

Searched: 2026-07-20T05:45:01.776569+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "min_distance_m": 443.69999999999998863131622783839702606201171875,
    "avg_distance_m": 449.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 5.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 56,
    "overlap_duration_s": 3361,
    "speed_a_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_a_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-19T23:04:47+00:00",
        "end": "2026-07-20T00:00:48+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 444m, avg 450m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 56 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: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 444m, avg 450m) for 56 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 40.95895500000000311047188006341457366943359375,
            "lon": 28.744161399999999417786966660059988498687744140625
        },
        "time_window": {
            "start_ts": "2026-07-19T23:04:47+00:00",
            "end_ts": "2026-07-20T00:00:48+00:00"
        },
        "searched_at": "2026-07-20T05:45:01.776569+00:00",
        "scene_id": "S1D_IW_GRDH_1SDV_20260720T041345_20260720T041410_003752_006BAD_2476_COG",
        "scene_datetime": "2026-07-20T04:13:45.759758Z",
        "platform": "sentinel-1d",
        "bbox": {
            "min_lon": 26.11334599999999994679455994628369808197021484375,
            "min_lat": 40.40309500000000042518877307884395122528076171875,
            "max_lon": 29.581807999999998770590536878444254398345947265625,
            "max_lat": 42.3123250000000012960299500264227390289306640625
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/07\/event_992009_thumbnail_20260720054506.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/07\/event_992009_thumbnail_20260720054506.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 22:24 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 1h 36m
  • Data Points: 16 AIS positions
  • Period: 2026-07-19T22:24:49+00:00 to 2026-07-20T00:00:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 96,
    "points_in_zone": 16,
    "first_point": {
        "ts": "2026-07-19T22:24:49+00:00",
        "lat": 40.96106499999999783767634653486311435699462890625,
        "lon": 28.744963299999998440625859075225889682769775390625
    },
    "last_point": {
        "ts": "2026-07-20T00:00:48+00:00",
        "lat": 40.96060829999999697292878408916294574737548828125,
        "lon": 28.745443300000001585203790455125272274017333984375
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 22:24 UTC 75.0%
  • Duration: 1h 36m
  • Radius: 51 meters
  • Data Points: 16 AIS positions
  • Centroid: 40.9609, 28.7450
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 51,
    "duration_minutes": 96,
    "points": 16,
    "centroid": {
        "lat": 40.960913756249993866731529124081134796142578125,
        "lon": 28.74499028750000206855474971234798431396484375
    },
    "bbox": {
        "min_lat": 40.96060829999999697292878408916294574737548828125,
        "min_lon": 28.744853299999999052261046017520129680633544921875,
        "max_lat": 40.96108670000000273603291134350001811981201171875,
        "max_lon": 28.745443300000001585203790455125272274017333984375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 22:17 UTC 65/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9221803 (YARA J) COMOROS
  • Minimum Distance: 444 meters
  • Average Distance: 453 meters
  • Duration: 1h 24m
  • Period: 2026-07-19T22:36:51+00:00 to 2026-07-20T00:00:48+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 444m, avg 453m) for 84 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 444m, avg 453m
Duration15/25Duration 84 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±7m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "min_distance_m": 443.69999999999998863131622783839702606201171875,
    "avg_distance_m": 452.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 6.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 84,
    "overlap_duration_s": 5037,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-19T22:36:51+00:00",
        "end": "2026-07-20T00:00:48+00:00"
    },
    "points_count": {
        "vessel_a": 14,
        "vessel_b": 14
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 444m, avg 453m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 84 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 444m, avg 453m) for 84 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 19, 2026 21:00 UTC 75/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9221803 (YARA J) COMOROS
  • Minimum Distance: 444 meters
  • Average Distance: 455 meters
  • Duration: 3 hours
  • Period: 2026-07-19T21:00:48+00:00 to 2026-07-20T00:00:48+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 444m, avg 455m) for 180 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 444m, avg 455m
Duration25/25Duration 180 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±8m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-20T03:30:04.872125+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "min_distance_m": 443.69999999999998863131622783839702606201171875,
    "avg_distance_m": 455,
    "distance_consistency_m": 7.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 180,
    "overlap_duration_s": 10800,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-19T21:00:48+00:00",
        "end": "2026-07-20T00:00:48+00:00"
    },
    "points_count": {
        "vessel_a": 18,
        "vessel_b": 18
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 444m, avg 455m"
            },
            "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 \u00b18m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 444m, avg 455m) for 180 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.95901669999999938909240881912410259246826171875,
            "lon": 28.744098699999998558496372424997389316558837890625
        },
        "time_window": {
            "start_ts": "2026-07-19T21:00:48+00:00",
            "end_ts": "2026-07-20T00:00:48+00:00"
        },
        "searched_at": "2026-07-20T03:30:04.872125+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 21:00 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 3 hours
  • Data Points: 18 AIS positions
  • Period: 2026-07-19T21:00:48+00:00 to 2026-07-20T00:00:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 180,
    "points_in_zone": 18,
    "first_point": {
        "ts": "2026-07-19T21:00:48+00:00",
        "lat": 40.9613650000000006912159733474254608154296875,
        "lon": 28.744749999999999801048033987171947956085205078125
    },
    "last_point": {
        "ts": "2026-07-20T00:00:48+00:00",
        "lat": 40.96060829999999697292878408916294574737548828125,
        "lon": 28.745443300000001585203790455125272274017333984375
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 21:00 UTC 75.0%
  • Duration: 3 hours
  • Radius: 56 meters
  • Data Points: 18 AIS positions
  • Centroid: 40.9610, 28.7450
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 55.7999999999999971578290569595992565155029296875,
    "duration_minutes": 180,
    "points": 18,
    "centroid": {
        "lat": 40.96095657777777176988820428960025310516357421875,
        "lon": 28.7449650722222287413387675769627094268798828125
    },
    "bbox": {
        "min_lat": 40.96060829999999697292878408916294574737548828125,
        "min_lon": 28.744749999999999801048033987171947956085205078125,
        "max_lat": 40.9613650000000006912159733474254608154296875,
        "max_lon": 28.745443300000001585203790455125272274017333984375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 20:42 UTC 75/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9221803 (YARA J) COMOROS
  • Minimum Distance: 444 meters
  • Average Distance: 455 meters
  • Duration: 3h 18m
  • Period: 2026-07-19T20:42:48+00:00 to 2026-07-20T00:00:48+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 444m, avg 455m) for 198 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 444m, avg 455m
Duration25/25Duration 198 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±8m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "min_distance_m": 443.69999999999998863131622783839702606201171875,
    "avg_distance_m": 454.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 7.5,
    "duration_minutes": 198,
    "overlap_duration_s": 11880,
    "speed_a_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-19T20:42:48+00:00",
        "end": "2026-07-20T00:00:48+00:00"
    },
    "points_count": {
        "vessel_a": 20,
        "vessel_b": 20
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 444m, avg 455m"
            },
            "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 \u00b18m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 444m, avg 455m) for 198 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 20:00 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 4 hours
  • Data Points: 24 AIS positions
  • Period: 2026-07-19T20:00:46+00:00 to 2026-07-20T00:00:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 240,
    "points_in_zone": 24,
    "first_point": {
        "ts": "2026-07-19T20:00:46+00:00",
        "lat": 40.96107500000000101181285572238266468048095703125,
        "lon": 28.74504999999999910187398199923336505889892578125
    },
    "last_point": {
        "ts": "2026-07-20T00:00:48+00:00",
        "lat": 40.96060829999999697292878408916294574737548828125,
        "lon": 28.745443300000001585203790455125272274017333984375
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 20:00 UTC 75.0%
  • Duration: 4 hours
  • Radius: 59 meters
  • Data Points: 24 AIS positions
  • Centroid: 40.9610, 28.7450
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 59.10000000000000142108547152020037174224853515625,
    "duration_minutes": 240,
    "points": 24,
    "centroid": {
        "lat": 40.96098875000000560930857318453490734100341796875,
        "lon": 28.744952766666660437522295978851616382598876953125
    },
    "bbox": {
        "min_lat": 40.96060829999999697292878408916294574737548828125,
        "min_lon": 28.744749999999999801048033987171947956085205078125,
        "max_lat": 40.9613650000000006912159733474254608154296875,
        "max_lon": 28.745443300000001585203790455125272274017333984375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 19, 2026 19:06 UTC 55/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9884150 (SERGEY LVOV) RUSSIA
  • Minimum Distance: 482 meters
  • Average Distance: 490 meters
  • Duration: 42 minutes
  • Period: 2026-07-19T19:30:47+00:00 to 2026-07-19T20:12:50+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 55/100

Low-confidence STS candidate - may warrant review. Two tankers (SAMANYOLU and SERGEY LVOV) maintained close proximity (min 482m, avg 490m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 482m, avg 490m
Duration5/25Duration 42 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±7m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-20T01:45:01.819955+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 273295620,
        "imo": 9884150,
        "name": "SERGEY LVOV",
        "flag": "RUSSIA"
    },
    "min_distance_m": 481.69999999999998863131622783839702606201171875,
    "avg_distance_m": 489.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 7.20000000000000017763568394002504646778106689453125,
    "duration_minutes": 42,
    "overlap_duration_s": 2523,
    "speed_a_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_a_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-07-19T19:30:47+00:00",
        "end": "2026-07-19T20:12:50+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 55,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 482m, avg 490m"
            },
            "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 \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Low-confidence STS candidate - may warrant review. Two tankers (SAMANYOLU and SERGEY LVOV) maintained close proximity (min 482m, avg 490m) for 42 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.963133999999996603946783579885959625244140625,
            "lon": 28.745805799999999408100848086178302764892578125
        },
        "time_window": {
            "start_ts": "2026-07-19T19:06:23+00:00",
            "end_ts": "2026-07-19T20:12:50+00:00"
        },
        "searched_at": "2026-07-20T01:45:01.819955+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 19:00 UTC 70/100
Vessel A: IMO 9221803 (YARA J) COMOROS
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 445 meters
  • Average Distance: 454 meters
  • Duration: 1h 54m
  • Period: 2026-07-19T19:32:01+00:00 to 2026-07-19T21:26:00+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 445m, avg 454m) for 114 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 445m, avg 454m
Duration20/25Duration 114 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±7m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 445.1000000000000227373675443232059478759765625,
    "avg_distance_m": 453.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 6.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 114,
    "overlap_duration_s": 6839,
    "speed_a_avg": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-19T19:32:01+00:00",
        "end": "2026-07-19T21:26:00+00:00"
    },
    "points_count": {
        "vessel_a": 12,
        "vessel_b": 12
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 445m, avg 454m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 114 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 445m, avg 454m) for 114 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 19:00 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 5 hours
  • Data Points: 28 AIS positions
  • Period: 2026-07-19T19:00:47+00:00 to 2026-07-20T00:00:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 300,
    "points_in_zone": 28,
    "first_point": {
        "ts": "2026-07-19T19:00:47+00:00",
        "lat": 40.9610832999999985304384608753025531768798828125,
        "lon": 28.74500499999999902911440585739910602569580078125
    },
    "last_point": {
        "ts": "2026-07-20T00:00:48+00:00",
        "lat": 40.96060829999999697292878408916294574737548828125,
        "lon": 28.745443300000001585203790455125272274017333984375
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 19:00 UTC 75.0%
  • Duration: 5 hours
  • Radius: 60 meters
  • Data Points: 28 AIS positions
  • Centroid: 40.9610, 28.7449
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 60,
    "duration_minutes": 300,
    "points": 28,
    "centroid": {
        "lat": 40.9609966642857301621916121803224086761474609375,
        "lon": 28.744947014285710196190848364494740962982177734375
    },
    "bbox": {
        "min_lat": 40.96060829999999697292878408916294574737548828125,
        "min_lon": 28.744749999999999801048033987171947956085205078125,
        "max_lat": 40.9613650000000006912159733474254608154296875,
        "max_lon": 28.745443300000001585203790455125272274017333984375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 18:30 UTC 70/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9884150 (SERGEY LVOV) RUSSIA
  • Minimum Distance: 472 meters
  • Average Distance: 489 meters
  • Duration: 1h 42m
  • Period: 2026-07-19T18:30:47+00:00 to 2026-07-19T20:12:50+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (SAMANYOLU and SERGEY LVOV) maintained close proximity (min 472m, avg 489m) for 102 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 472m, avg 489m
Duration20/25Duration 102 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 273295620,
        "imo": 9884150,
        "name": "SERGEY LVOV",
        "flag": "RUSSIA"
    },
    "min_distance_m": 472.19999999999998863131622783839702606201171875,
    "avg_distance_m": 489.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 9.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 102,
    "overlap_duration_s": 6123,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-07-19T18:30:47+00:00",
        "end": "2026-07-19T20:12:50+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 472m, avg 489m"
            },
            "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 \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SAMANYOLU and SERGEY LVOV) maintained close proximity (min 472m, avg 489m) for 102 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 18:30 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 5h 30m
  • Data Points: 31 AIS positions
  • Period: 2026-07-19T18:30:47+00:00 to 2026-07-20T00:00:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 330,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-07-19T18:30:47+00:00",
        "lat": 40.96080669999999912533894530497491359710693359375,
        "lon": 28.744996700000001510488800704479217529296875
    },
    "last_point": {
        "ts": "2026-07-20T00:00:48+00:00",
        "lat": 40.96060829999999697292878408916294574737548828125,
        "lon": 28.745443300000001585203790455125272274017333984375
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 18:30 UTC 75.0%
  • Duration: 5h 30m
  • Radius: 59 meters
  • Data Points: 31 AIS positions
  • Centroid: 40.9610, 28.7449
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 59,
    "duration_minutes": 330,
    "points": 31,
    "centroid": {
        "lat": 40.96098601935484140312837553210556507110595703125,
        "lon": 28.744949722580638962199373054318130016326904296875
    },
    "bbox": {
        "min_lat": 40.96060829999999697292878408916294574737548828125,
        "min_lon": 28.744749999999999801048033987171947956085205078125,
        "max_lat": 40.9613650000000006912159733474254608154296875,
        "max_lon": 28.745443300000001585203790455125272274017333984375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 18:23 UTC 75/100
Vessel A: IMO 9221803 (YARA J) COMOROS
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 445 meters
  • Average Distance: 456 meters
  • Duration: 3h 3m
  • Period: 2026-07-19T18:23:02+00:00 to 2026-07-19T21:26:00+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 444m, avg 456m) for 183 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 444m, avg 456m
Duration25/25Duration 183 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 444.5,
    "avg_distance_m": 456.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 8.5999999999999996447286321199499070644378662109375,
    "duration_minutes": 183,
    "overlap_duration_s": 10978,
    "speed_a_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_a_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-19T18:23:02+00:00",
        "end": "2026-07-19T21:26:00+00:00"
    },
    "points_count": {
        "vessel_a": 23,
        "vessel_b": 23
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 444m, avg 456m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 183 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 444m, avg 456m) for 183 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 17:12 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 30m
  • Data Points: 36 AIS positions
  • Period: 2026-07-19T17:30:49+00:00 to 2026-07-20T00:00:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 390,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-07-19T17:30:49+00:00",
        "lat": 40.9609650000000016234480426646769046783447265625,
        "lon": 28.7447982999999993580786394886672496795654296875
    },
    "last_point": {
        "ts": "2026-07-20T00:00:48+00:00",
        "lat": 40.96060829999999697292878408916294574737548828125,
        "lon": 28.745443300000001585203790455125272274017333984375
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 17:12 UTC 75.0%
  • Duration: 6h 30m
  • Radius: 59 meters
  • Data Points: 36 AIS positions
  • Centroid: 40.9610, 28.7449
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 59.2000000000000028421709430404007434844970703125,
    "duration_minutes": 390,
    "points": 36,
    "centroid": {
        "lat": 40.9609800444444545064470730721950531005859375,
        "lon": 28.7449393888888806714021484367549419403076171875
    },
    "bbox": {
        "min_lat": 40.96060829999999697292878408916294574737548828125,
        "min_lon": 28.744749999999999801048033987171947956085205078125,
        "max_lat": 40.9613650000000006912159733474254608154296875,
        "max_lon": 28.745443300000001585203790455125272274017333984375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 17:05 UTC 75/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9221803 (YARA J) COMOROS
  • Minimum Distance: 441 meters
  • Average Distance: 457 meters
  • Duration: 3h 3m
  • Period: 2026-07-19T17:12:48+00:00 to 2026-07-19T20:15:47+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 441m, avg 457m) for 183 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 441m, avg 457m
Duration25/25Duration 183 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±8m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "min_distance_m": 440.69999999999998863131622783839702606201171875,
    "avg_distance_m": 457,
    "distance_consistency_m": 8,
    "duration_minutes": 183,
    "overlap_duration_s": 10979,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_b_std": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.11000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-07-19T17:12:48+00:00",
        "end": "2026-07-19T20:15:47+00:00"
    },
    "points_count": {
        "vessel_a": 18,
        "vessel_b": 18
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 441m, avg 457m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 183 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b18m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 441m, avg 457m) for 183 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 16:18 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 32m
  • Data Points: 31 AIS positions
  • Period: 2026-07-19T16:22:49+00:00 to 2026-07-19T22:54:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 392,
    "points_in_zone": 31,
    "first_point": {
        "ts": "2026-07-19T16:22:49+00:00",
        "lat": 40.96056829999999848723746254108846187591552734375,
        "lon": 28.745258299999999707097231294028460979461669921875
    },
    "last_point": {
        "ts": "2026-07-19T22:54:51+00:00",
        "lat": 40.9608817000000016150806914083659648895263671875,
        "lon": 28.744973300000001614762368262745440006256103515625
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 16:18 UTC 75.0%
  • Duration: 6h 32m
  • Radius: 54 meters
  • Data Points: 31 AIS positions
  • Centroid: 40.9610, 28.7449
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 53.60000000000000142108547152020037174224853515625,
    "duration_minutes": 392,
    "points": 31,
    "centroid": {
        "lat": 40.960979838709675959762535057961940765380859375,
        "lon": 28.744925422580646312553653842769563198089599609375
    },
    "bbox": {
        "min_lat": 40.96056829999999848723746254108846187591552734375,
        "min_lon": 28.744749999999999801048033987171947956085205078125,
        "max_lat": 40.9613650000000006912159733474254608154296875,
        "max_lon": 28.74526829999999932852006168104708194732666015625
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 19, 2026 15:06 UTC 65/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9221803 (YARA J) COMOROS
  • Minimum Distance: 445 meters
  • Average Distance: 459 meters
  • Duration: 1h 16m
  • Period: 2026-07-19T15:06:46+00:00 to 2026-07-19T16:22:49+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 445m, avg 459m) for 76 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 445m, avg 459m
Duration15/25Duration 76 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±11m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-19T21:15:01.857930+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "min_distance_m": 444.69999999999998863131622783839702606201171875,
    "avg_distance_m": 459.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 11,
    "duration_minutes": 76,
    "overlap_duration_s": 4563,
    "speed_a_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0.1600000000000000033306690738754696212708950042724609375,
    "speed_b_std": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.1600000000000000033306690738754696212708950042724609375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-07-19T15:06:46+00:00",
        "end": "2026-07-19T16:22:49+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 445m, avg 459m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 76 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b111m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 445m, avg 459m) for 76 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.9586886000000021113010006956756114959716796875,
            "lon": 28.744314700000000328827809426002204418182373046875
        },
        "time_window": {
            "start_ts": "2026-07-19T15:06:46+00:00",
            "end_ts": "2026-07-19T16:22:49+00:00"
        },
        "searched_at": "2026-07-19T21:15:01.857930+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 15:06 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 34m
  • Data Points: 30 AIS positions
  • Period: 2026-07-19T15:54:50+00:00 to 2026-07-19T22:28:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 394,
    "points_in_zone": 30,
    "first_point": {
        "ts": "2026-07-19T15:54:50+00:00",
        "lat": 40.9606466999999980771463015116751194000244140625,
        "lon": 28.7451267000000001416992745362222194671630859375
    },
    "last_point": {
        "ts": "2026-07-19T22:28:52+00:00",
        "lat": 40.96102669999999790206857142038643360137939453125,
        "lon": 28.744853299999999052261046017520129680633544921875
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 15:06 UTC 75.0%
  • Duration: 6h 34m
  • Radius: 50 meters
  • Data Points: 30 AIS positions
  • Centroid: 40.9609, 28.7450
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 49.5,
    "duration_minutes": 394,
    "points": 30,
    "centroid": {
        "lat": 40.96094799666666830262329312972724437713623046875,
        "lon": 28.744956386666668635143651044927537441253662109375
    },
    "bbox": {
        "min_lat": 40.96056829999999848723746254108846187591552734375,
        "min_lon": 28.744749999999999801048033987171947956085205078125,
        "max_lat": 40.9613650000000006912159733474254608154296875,
        "max_lon": 28.745311699999998467092154896818101406097412109375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 14:52 UTC 70/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9221803 (YARA J) COMOROS
  • Minimum Distance: 445 meters
  • Average Distance: 463 meters
  • Duration: 1h 30m
  • Period: 2026-07-19T14:52:50+00:00 to 2026-07-19T16:22:49+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 445m, avg 463m) for 90 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 445m, avg 463m
Duration20/25Duration 90 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±13m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "min_distance_m": 444.69999999999998863131622783839702606201171875,
    "avg_distance_m": 463.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 13,
    "duration_minutes": 90,
    "overlap_duration_s": 5399,
    "speed_a_avg": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_a_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_avg": 0.11999999999999999555910790149937383830547332763671875,
    "speed_b_std": 0.11999999999999999555910790149937383830547332763671875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0899999999999999966693309261245303787291049957275390625,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.11999999999999999555910790149937383830547332763671875,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-07-19T14:52:50+00:00",
        "end": "2026-07-19T16:22:49+00:00"
    },
    "points_count": {
        "vessel_a": 9,
        "vessel_b": 9
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 445m, avg 463m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 90 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b113m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 445m, avg 463m) for 90 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 14:10 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 32m
  • Data Points: 33 AIS positions
  • Period: 2026-07-19T14:52:50+00:00 to 2026-07-19T21:24:50+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 392,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-07-19T14:52:50+00:00",
        "lat": 40.96098330000000231621015700511634349822998046875,
        "lon": 28.745051700000001204671207233332097530364990234375
    },
    "last_point": {
        "ts": "2026-07-19T21:24:50+00:00",
        "lat": 40.96123330000000350992195308208465576171875,
        "lon": 28.744776699999999181045495788566768169403076171875
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 14:10 UTC 75.0%
  • Duration: 6h 32m
  • Radius: 53 meters
  • Data Points: 33 AIS positions
  • Centroid: 40.9609, 28.7450
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 53.39999999999999857891452847979962825775146484375,
    "duration_minutes": 392,
    "points": 33,
    "centroid": {
        "lat": 40.96091666060607394683756865561008453369140625,
        "lon": 28.74498030606060439140492235310375690460205078125
    },
    "bbox": {
        "min_lat": 40.96056829999999848723746254108846187591552734375,
        "min_lon": 28.744749999999999801048033987171947956085205078125,
        "max_lat": 40.9613650000000006912159733474254608154296875,
        "max_lon": 28.745311699999998467092154896818101406097412109375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 13:36 UTC 75/100
Vessel A: IMO 9221803 (YARA J) COMOROS
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 445 meters
  • Average Distance: 458 meters
  • Duration: 3h 6m
  • Period: 2026-07-19T13:07:57+00:00 to 2026-07-19T16:14:00+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 445m, avg 458m) for 186 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 445m, avg 458m
Duration25/25Duration 186 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±8m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 445.1000000000000227373675443232059478759765625,
    "avg_distance_m": 458,
    "distance_consistency_m": 8.199999999999999289457264239899814128875732421875,
    "duration_minutes": 186.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 11163,
    "speed_a_avg": 0.11999999999999999555910790149937383830547332763671875,
    "speed_a_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11999999999999999555910790149937383830547332763671875,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-19T13:07:57+00:00",
        "end": "2026-07-19T16:14:00+00:00"
    },
    "points_count": {
        "vessel_a": 13,
        "vessel_b": 13
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 445m, avg 458m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 186 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b18m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 445m, avg 458m) for 186 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 19, 2026 13:06 UTC 75/100
Vessel A: IMO 9884150 (SERGEY LVOV) RUSSIA
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 490 meters
  • Average Distance: 495 meters
  • Duration: 5h 45m
  • Period: 2026-07-19T13:06:27+00:00 to 2026-07-19T18:52:24+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 490m, avg 495m) for 346 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 Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 490m, avg 495m
Duration25/25Duration 346 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-19T19:15:01.886723+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273295620,
        "imo": 9884150,
        "name": "SERGEY LVOV",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 490.3999999999999772626324556767940521240234375,
    "avg_distance_m": 494.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 3.29999999999999982236431605997495353221893310546875,
    "duration_minutes": 345.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 20757,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-19T13:06:27+00:00",
        "end": "2026-07-19T18:52:24+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 490m, avg 495m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 346 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: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 490m, avg 495m) for 346 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 Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.96290119999999745914465165697038173675537109375,
            "lon": 28.745940799999999626379576511681079864501953125
        },
        "time_window": {
            "start_ts": "2026-07-19T13:06:27+00:00",
            "end_ts": "2026-07-19T18:52:24+00:00"
        },
        "searched_at": "2026-07-19T19:15:01.886723+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 13:00 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 34m
  • Data Points: 33 AIS positions
  • Period: 2026-07-19T13:54:52+00:00 to 2026-07-19T20:29:47+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 394.8999999999999772626324556767940521240234375,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-07-19T13:54:52+00:00",
        "lat": 40.96074999999999732835931354202330112457275390625,
        "lon": 28.745026700000000374757291865535080432891845703125
    },
    "last_point": {
        "ts": "2026-07-19T20:29:47+00:00",
        "lat": 40.9610449999999985948306857608258724212646484375,
        "lon": 28.744855000000001155058271251618862152099609375
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 13:00 UTC 75.0%
  • Duration: 6h 34m
  • Radius: 41 meters
  • Data Points: 33 AIS positions
  • Centroid: 40.9609, 28.7450
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 40.60000000000000142108547152020037174224853515625,
    "duration_minutes": 394.8999999999999772626324556767940521240234375,
    "points": 33,
    "centroid": {
        "lat": 40.960863124242422372844885103404521942138671875,
        "lon": 28.745006263636366128366717020981013774871826171875
    },
    "bbox": {
        "min_lat": 40.96056829999999848723746254108846187591552734375,
        "min_lon": 28.7447982999999993580786394886672496795654296875,
        "max_lat": 40.9610832999999985304384608753025531768798828125,
        "max_lon": 28.745311699999998467092154896818101406097412109375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 19, 2026 12:41 UTC 75/100
Vessel A: IMO 9221803 (YARA J) COMOROS
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 445 meters
  • Average Distance: 458 meters
  • Duration: 3h 33m
  • Period: 2026-07-19T12:41:02+00:00 to 2026-07-19T16:14:00+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 445m, avg 458m) for 213 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 445m, avg 458m
Duration25/25Duration 213 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±10m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-19T19:15:08.164864+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 445.1000000000000227373675443232059478759765625,
    "avg_distance_m": 458.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 9.5,
    "duration_minutes": 213,
    "overlap_duration_s": 12778,
    "speed_a_avg": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-19T12:41:02+00:00",
        "end": "2026-07-19T16:14:00+00:00"
    },
    "points_count": {
        "vessel_a": 15,
        "vessel_b": 15
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 445m, avg 458m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 213 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 445m, avg 458m) for 213 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.9587322000000000343788997270166873931884765625,
            "lon": 28.744267799999999368765202234499156475067138671875
        },
        "time_window": {
            "start_ts": "2026-07-19T12:41:02+00:00",
            "end_ts": "2026-07-19T16:14:00+00:00"
        },
        "searched_at": "2026-07-19T19:15:08.164864+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 19, 2026 12:32 UTC 55/100
Vessel A: IMO 9884150 (SERGEY LVOV) RUSSIA
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 471 meters
  • Average Distance: 482 meters
  • Duration: 34 minutes
  • Period: 2026-07-19T12:32:24+00:00 to 2026-07-19T13:06:27+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 55/100

Low-confidence STS candidate - may warrant review. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 471m, avg 482m) for 34 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 471m, avg 482m
Duration5/25Duration 34 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±15m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-19T16:00:07.428809+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273295620,
        "imo": 9884150,
        "name": "SERGEY LVOV",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 471.3999999999999772626324556767940521240234375,
    "avg_distance_m": 482.1000000000000227373675443232059478759765625,
    "distance_consistency_m": 15.199999999999999289457264239899814128875732421875,
    "duration_minutes": 34,
    "overlap_duration_s": 2043,
    "speed_a_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.14000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_std": 0.070000000000000006661338147750939242541790008544921875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-19T12:32:24+00:00",
        "end": "2026-07-19T13:06:27+00:00"
    },
    "points_count": {
        "vessel_a": 2,
        "vessel_b": 2
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 55,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 471m, avg 482m"
            },
            "duration": {
                "score": 5,
                "max": 25,
                "detail": "Duration 34 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b115m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Low-confidence STS candidate - may warrant review. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 471m, avg 482m) for 34 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.9627746000000030335286282934248447418212890625,
            "lon": 28.746044200000000046202330850064754486083984375
        },
        "time_window": {
            "start_ts": "2026-07-19T12:32:24+00:00",
            "end_ts": "2026-07-19T13:06:27+00:00"
        },
        "searched_at": "2026-07-19T16:00:07.428809+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 12:04 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 23m
  • Data Points: 33 AIS positions
  • Period: 2026-07-19T12:40:50+00:00 to 2026-07-19T19:04:47+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 383.8999999999999772626324556767940521240234375,
    "points_in_zone": 33,
    "first_point": {
        "ts": "2026-07-19T12:40:50+00:00",
        "lat": 40.96083829999999892379491939209401607513427734375,
        "lon": 28.745000000000000994759830064140260219573974609375
    },
    "last_point": {
        "ts": "2026-07-19T19:04:47+00:00",
        "lat": 40.96101829999999921483322395943105220794677734375,
        "lon": 28.74492169999999902074705460108816623687744140625
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 12:04 UTC 75.0%
  • Duration: 6h 23m
  • Radius: 36 meters
  • Data Points: 33 AIS positions
  • Centroid: 40.9608, 28.7450
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 36.39999999999999857891452847979962825775146484375,
    "duration_minutes": 383.8999999999999772626324556767940521240234375,
    "points": 33,
    "centroid": {
        "lat": 40.9608232787878705494222231209278106689453125,
        "lon": 28.74501954545454651679392554797232151031494140625
    },
    "bbox": {
        "min_lat": 40.96056829999999848723746254108846187591552734375,
        "min_lon": 28.7447982999999993580786394886672496795654296875,
        "max_lat": 40.9610832999999985304384608753025531768798828125,
        "max_lon": 28.745311699999998467092154896818101406097412109375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 19, 2026 11:02 UTC 75/100
Vessel A: IMO 9221803 (YARA J) COMOROS
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 445 meters
  • Average Distance: 462 meters
  • Duration: 5h 11m
  • Period: 2026-07-19T11:02:03+00:00 to 2026-07-19T16:14:00+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 445m, avg 462m) for 312 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 445m, avg 462m
Duration25/25Duration 312 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±10m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-19T17:15:01.607519+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 445.1000000000000227373675443232059478759765625,
    "avg_distance_m": 462.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 10.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 311.8999999999999772626324556767940521240234375,
    "overlap_duration_s": 18717,
    "speed_a_avg": 0.13000000000000000444089209850062616169452667236328125,
    "speed_a_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_b_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.13000000000000000444089209850062616169452667236328125,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-07-19T11:02:03+00:00",
        "end": "2026-07-19T16:14:00+00:00"
    },
    "points_count": {
        "vessel_a": 24,
        "vessel_b": 24
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 445m, avg 462m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 312 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 445m, avg 462m) for 312 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.95873590000000064037521951831877231597900390625,
            "lon": 28.744280100000000999216354102827608585357666015625
        },
        "time_window": {
            "start_ts": "2026-07-19T11:02:03+00:00",
            "end_ts": "2026-07-19T16:14:00+00:00"
        },
        "searched_at": "2026-07-19T17:15:01.607519+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 11:00 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 29m
  • Data Points: 36 AIS positions
  • Period: 2026-07-19T11:24:50+00:00 to 2026-07-19T17:54:47+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 389.8999999999999772626324556767940521240234375,
    "points_in_zone": 36,
    "first_point": {
        "ts": "2026-07-19T11:24:50+00:00",
        "lat": 40.960686699999996562837623059749603271484375,
        "lon": 28.745259999999998257180777727626264095306396484375
    },
    "last_point": {
        "ts": "2026-07-19T17:54:47+00:00",
        "lat": 40.960828300000002855085767805576324462890625,
        "lon": 28.744948300000000784848452894948422908782958984375
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 11:00 UTC 75.0%
  • Duration: 6h 29m
  • Radius: 45 meters
  • Data Points: 36 AIS positions
  • Centroid: 40.9608, 28.7450
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 45.2000000000000028421709430404007434844970703125,
    "duration_minutes": 389.8999999999999772626324556767940521240234375,
    "points": 36,
    "centroid": {
        "lat": 40.960818516666648747559520415961742401123046875,
        "lon": 28.74502643611111096788590657524764537811279296875
    },
    "bbox": {
        "min_lat": 40.96056829999999848723746254108846187591552734375,
        "min_lon": 28.744751699999998351131580420769751071929931640625,
        "max_lat": 40.96116829999999708888935856521129608154296875,
        "max_lon": 28.745354999999999989768184605054557323455810546875
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 10:43 UTC 75/100
Vessel A: IMO 9221803 (YARA J) COMOROS
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 445 meters
  • Average Distance: 464 meters
  • Duration: 5h 24m
  • Period: 2026-07-19T10:43:57+00:00 to 2026-07-19T16:08:02+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 445m, avg 464m) for 324 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 445m, avg 464m
Duration25/25Duration 324 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±11m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 445.1000000000000227373675443232059478759765625,
    "avg_distance_m": 463.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 11.199999999999999289457264239899814128875732421875,
    "duration_minutes": 324.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 19445,
    "speed_a_avg": 0.13000000000000000444089209850062616169452667236328125,
    "speed_a_std": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.13000000000000000444089209850062616169452667236328125,
    "speed_b_std": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.13000000000000000444089209850062616169452667236328125,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0.13000000000000000444089209850062616169452667236328125,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-07-19T10:43:57+00:00",
        "end": "2026-07-19T16:08:02+00:00"
    },
    "points_count": {
        "vessel_a": 25,
        "vessel_b": 25
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 445m, avg 464m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 324 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b111m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 445m, avg 464m) for 324 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 10:07 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 29m
  • Data Points: 35 AIS positions
  • Period: 2026-07-19T10:54:51+00:00 to 2026-07-19T17:24:48+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 389.8999999999999772626324556767940521240234375,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-07-19T10:54:51+00:00",
        "lat": 40.96053330000000158861439558677375316619873046875,
        "lon": 28.745464999999999378132997662760317325592041015625
    },
    "last_point": {
        "ts": "2026-07-19T17:24:48+00:00",
        "lat": 40.96094000000000079353412729687988758087158203125,
        "lon": 28.744858300000000639329300611279904842376708984375
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 10:07 UTC 75.0%
  • Duration: 6h 29m
  • Radius: 50 meters
  • Data Points: 35 AIS positions
  • Centroid: 40.9608, 28.7451
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 50.2999999999999971578290569595992565155029296875,
    "duration_minutes": 389.8999999999999772626324556767940521240234375,
    "points": 35,
    "centroid": {
        "lat": 40.96078442571427302709707873873412609100341796875,
        "lon": 28.74506895428572050832372042350471019744873046875
    },
    "bbox": {
        "min_lat": 40.96053330000000158861439558677375316619873046875,
        "min_lon": 28.744751699999998351131580420769751071929931640625,
        "max_lat": 40.96116829999999708888935856521129608154296875,
        "max_lon": 28.745464999999999378132997662760317325592041015625
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 09:47 UTC 75/100
Vessel A: IMO 9884150 (SERGEY LVOV) RUSSIA
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 469 meters
  • Average Distance: 478 meters
  • Duration: 3h 19m
  • Period: 2026-07-19T09:47:24+00:00 to 2026-07-19T13:06:27+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 469m, avg 478m) for 199 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 469m, avg 478m
Duration25/25Duration 199 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±13m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273295620,
        "imo": 9884150,
        "name": "SERGEY LVOV",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 469.3999999999999772626324556767940521240234375,
    "avg_distance_m": 477.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 13,
    "duration_minutes": 199.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 11943,
    "speed_a_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_a_std": 0.11999999999999999555910790149937383830547332763671875,
    "speed_b_avg": 0.070000000000000006661338147750939242541790008544921875,
    "speed_b_std": 0.059999999999999997779553950749686919152736663818359375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        },
        "vessel_b": {
            "avg_sog": 0.070000000000000006661338147750939242541790008544921875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-19T09:47:24+00:00",
        "end": "2026-07-19T13:06:27+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 469m, avg 478m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 199 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b113m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 469m, avg 478m) for 199 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 09:41 UTC 75/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9221803 (YARA J) COMOROS
  • Minimum Distance: 417 meters
  • Average Distance: 463 meters
  • Duration: 2h 44m
  • Period: 2026-07-19T09:20:00+00:00 to 2026-07-19T12:04:50+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 417m, avg 463m) for 165 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 417m, avg 463m
Duration25/25Duration 165 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±16m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "min_distance_m": 417.3999999999999772626324556767940521240234375,
    "avg_distance_m": 463,
    "distance_consistency_m": 15.699999999999999289457264239899814128875732421875,
    "duration_minutes": 164.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 9890,
    "speed_a_avg": 0.1600000000000000033306690738754696212708950042724609375,
    "speed_a_std": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.179999999999999993338661852249060757458209991455078125,
    "speed_b_std": 0.14000000000000001332267629550187848508358001708984375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1600000000000000033306690738754696212708950042724609375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0.179999999999999993338661852249060757458209991455078125,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-07-19T09:20:00+00:00",
        "end": "2026-07-19T12:04:50+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 417m, avg 463m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 165 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b116m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 417m, avg 463m) for 165 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 09:11 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 30m
  • Data Points: 37 AIS positions
  • Period: 2026-07-19T09:53:55+00:00 to 2026-07-19T16:24:50+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 390.8999999999999772626324556767940521240234375,
    "points_in_zone": 37,
    "first_point": {
        "ts": "2026-07-19T09:53:55+00:00",
        "lat": 40.9609166999999985137037583626806735992431640625,
        "lon": 28.74500330000000047903085942380130290985107421875
    },
    "last_point": {
        "ts": "2026-07-19T16:24:50+00:00",
        "lat": 40.96059170000000193567757378332316875457763671875,
        "lon": 28.74526829999999932852006168104708194732666015625
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 09:11 UTC 75.0%
  • Duration: 6h 30m
  • Radius: 53 meters
  • Data Points: 37 AIS positions
  • Centroid: 40.9608, 28.7451
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 53,
    "duration_minutes": 390.8999999999999772626324556767940521240234375,
    "points": 37,
    "centroid": {
        "lat": 40.960769054054054549851571209728717803955078125,
        "lon": 28.745096264864866242305652122013270854949951171875
    },
    "bbox": {
        "min_lat": 40.9605217000000010330040822736918926239013671875,
        "min_lon": 28.744751699999998351131580420769751071929931640625,
        "max_lat": 40.96116829999999708888935856521129608154296875,
        "max_lon": 28.745464999999999378132997662760317325592041015625
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 08:15 UTC 75/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9221803 (YARA J) COMOROS
  • Minimum Distance: 417 meters
  • Average Distance: 460 meters
  • Duration: 3h 49m
  • Period: 2026-07-19T08:15:00+00:00 to 2026-07-19T12:04:50+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.2 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 417m, avg 460m) for 230 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 417m, avg 460m
Duration25/25Duration 230 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±17m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "min_distance_m": 417.3999999999999772626324556767940521240234375,
    "avg_distance_m": 459.69999999999998863131622783839702606201171875,
    "distance_consistency_m": 16.60000000000000142108547152020037174224853515625,
    "duration_minutes": 229.80000000000001136868377216160297393798828125,
    "overlap_duration_s": 13790,
    "speed_a_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_a_std": 0.11999999999999999555910790149937383830547332763671875,
    "speed_b_avg": 0.179999999999999993338661852249060757458209991455078125,
    "speed_b_std": 0.14000000000000001332267629550187848508358001708984375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        },
        "vessel_b": {
            "avg_sog": 0.179999999999999993338661852249060757458209991455078125,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        }
    },
    "time_window": {
        "start": "2026-07-19T08:15:00+00:00",
        "end": "2026-07-19T12:04:50+00:00"
    },
    "points_count": {
        "vessel_a": 21,
        "vessel_b": 21
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 417m, avg 460m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 230 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b117m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 417m, avg 460m) for 230 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.2 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 08:03 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 25m
  • Data Points: 35 AIS positions
  • Period: 2026-07-19T08:41:01+00:00 to 2026-07-19T15:06:46+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 385.80000000000001136868377216160297393798828125,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-07-19T08:41:01+00:00",
        "lat": 40.9618717000000032157913665287196636199951171875,
        "lon": 28.74496500000000054342308430932462215423583984375
    },
    "last_point": {
        "ts": "2026-07-19T15:06:46+00:00",
        "lat": 40.960949999999996862243278883397579193115234375,
        "lon": 28.7448617000000012922100722789764404296875
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 08:03 UTC 75.0%
  • Duration: 6h 25m
  • Radius: 124 meters
  • Data Points: 35 AIS positions
  • Centroid: 40.9609, 28.7450
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 123.599999999999994315658113919198513031005859375,
    "duration_minutes": 385.80000000000001136868377216160297393798828125,
    "points": 35,
    "centroid": {
        "lat": 40.96093019142858082659586216323077678680419921875,
        "lon": 28.745046239999997084169081063009798526763916015625
    },
    "bbox": {
        "min_lat": 40.9605217000000010330040822736918926239013671875,
        "min_lon": 28.744751699999998351131580420769751071929931640625,
        "max_lat": 40.9620400000000017826096154749393463134765625,
        "max_lon": 28.745464999999999378132997662760317325592041015625
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 07:19 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 19m
  • Data Points: 34 AIS positions
  • Period: 2026-07-19T07:57:05+00:00 to 2026-07-19T14:16:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 379.80000000000001136868377216160297393798828125,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-07-19T07:57:05+00:00",
        "lat": 40.9618382999999965932147460989654064178466796875,
        "lon": 28.7448949999999996407495927996933460235595703125
    },
    "last_point": {
        "ts": "2026-07-19T14:16:52+00:00",
        "lat": 40.96094329999999672509147785604000091552734375,
        "lon": 28.744963299999998440625859075225889682769775390625
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 07:19 UTC 75.0%
  • Duration: 6h 19m
  • Radius: 114 meters
  • Data Points: 34 AIS positions
  • Centroid: 40.9610, 28.7450
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 113.900000000000005684341886080801486968994140625,
    "duration_minutes": 379.80000000000001136868377216160297393798828125,
    "points": 34,
    "centroid": {
        "lat": 40.9610184323529296079868800006806850433349609375,
        "lon": 28.745038038235296795619433396495878696441650390625
    },
    "bbox": {
        "min_lat": 40.9605217000000010330040822736918926239013671875,
        "min_lon": 28.744751699999998351131580420769751071929931640625,
        "max_lat": 40.9620400000000017826096154749393463134765625,
        "max_lon": 28.745464999999999378132997662760317325592041015625
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 19, 2026 07:01 UTC 65/100
Vessel A: IMO 9221803 (YARA J) COMOROS
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 423 meters
  • Average Distance: 433 meters
  • Duration: 1h 21m
  • Period: 2026-07-19T07:01:56+00:00 to 2026-07-19T08:23:03+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 423m, avg 433m) for 81 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 423m, avg 433m
Duration15/25Duration 81 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±10m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-19T13:30:02.178143+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 422.8999999999999772626324556767940521240234375,
    "avg_distance_m": 433.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 9.699999999999999289457264239899814128875732421875,
    "duration_minutes": 81.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 4867,
    "speed_a_avg": 0.1600000000000000033306690738754696212708950042724609375,
    "speed_a_std": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1600000000000000033306690738754696212708950042724609375,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0.040000000000000000832667268468867405317723751068115234375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-19T07:01:56+00:00",
        "end": "2026-07-19T08:23:03+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 423m, avg 433m"
            },
            "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 \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 423m, avg 433m) for 81 minutes. Both vessels were slow-moving (avg speeds 0.2 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.95989519999999828314685146324336528778076171875,
            "lon": 28.744064900000001472335497965104877948760986328125
        },
        "time_window": {
            "start_ts": "2026-07-19T07:01:56+00:00",
            "end_ts": "2026-07-19T08:23:03+00:00"
        },
        "searched_at": "2026-07-19T13:30:02.178143+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 06:37 UTC 60/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9221803 (YARA J) COMOROS
  • Minimum Distance: 422 meters
  • Average Distance: 433 meters
  • Duration: 56 minutes
  • Period: 2026-07-19T06:37:07+00:00 to 2026-07-19T07:33:04+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 422m, avg 433m) for 56 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 422m, avg 433m
Duration10/25Duration 56 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "min_distance_m": 422,
    "avg_distance_m": 433.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 9.300000000000000710542735760100185871124267578125,
    "duration_minutes": 56,
    "overlap_duration_s": 3357,
    "speed_a_avg": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_a_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_b_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.05000000000000000277555756156289135105907917022705078125,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-19T06:37:07+00:00",
        "end": "2026-07-19T07:33:04+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 422m, avg 433m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 56 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 422m, avg 433m) for 56 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 06:03 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 29m
  • Data Points: 35 AIS positions
  • Period: 2026-07-19T06:55:08+00:00 to 2026-07-19T13:24:50+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 389.69999999999998863131622783839702606201171875,
    "points_in_zone": 35,
    "first_point": {
        "ts": "2026-07-19T06:55:08+00:00",
        "lat": 40.96157329999999774372554384171962738037109375,
        "lon": 28.744820000000000703721525496803224086761474609375
    },
    "last_point": {
        "ts": "2026-07-19T13:24:50+00:00",
        "lat": 40.9607682999999980211214278824627399444580078125,
        "lon": 28.744941699999998263592715375125408172607421875
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 06:03 UTC 75.0%
  • Duration: 6h 29m
  • Radius: 100 meters
  • Data Points: 35 AIS positions
  • Centroid: 40.9611, 28.7450
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 99.900000000000005684341886080801486968994140625,
    "duration_minutes": 389.69999999999998863131622783839702606201171875,
    "points": 35,
    "centroid": {
        "lat": 40.96114814571427586997742764651775360107421875,
        "lon": 28.74501057142857263215773855336010456085205078125
    },
    "bbox": {
        "min_lat": 40.9605217000000010330040822736918926239013671875,
        "min_lon": 28.744751699999998351131580420769751071929931640625,
        "max_lat": 40.9620400000000017826096154749393463134765625,
        "max_lon": 28.745464999999999378132997662760317325592041015625
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 05:37 UTC 75/100
Vessel A: IMO 9221803 (YARA J) COMOROS
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 415 meters
  • Average Distance: 430 meters
  • Duration: 3 hours
  • Period: 2026-07-19T05:22:58+00:00 to 2026-07-19T08:23:03+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 415m, avg 430m) for 180 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 415m, avg 430m
Duration25/25Duration 180 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 414.69999999999998863131622783839702606201171875,
    "avg_distance_m": 430,
    "distance_consistency_m": 9.300000000000000710542735760100185871124267578125,
    "duration_minutes": 180.099999999999994315658113919198513031005859375,
    "overlap_duration_s": 10805,
    "speed_a_avg": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-19T05:22:58+00:00",
        "end": "2026-07-19T08:23:03+00:00"
    },
    "points_count": {
        "vessel_a": 15,
        "vessel_b": 15
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 415m, avg 430m"
            },
            "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 \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 415m, avg 430m) for 180 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 05:03 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 25m
  • Data Points: 38 AIS positions
  • Period: 2026-07-19T05:57:07+00:00 to 2026-07-19T12:22:49+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 385.69999999999998863131622783839702606201171875,
    "points_in_zone": 38,
    "first_point": {
        "ts": "2026-07-19T05:57:07+00:00",
        "lat": 40.9616266999999965037204674445092678070068359375,
        "lon": 28.74483000000000032514435588382184505462646484375
    },
    "last_point": {
        "ts": "2026-07-19T12:22:49+00:00",
        "lat": 40.9610033000000015590558177791535854339599609375,
        "lon": 28.74487669999999894798747845925390720367431640625
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 05:03 UTC 75.0%
  • Duration: 6h 25m
  • Radius: 93 meters
  • Data Points: 38 AIS positions
  • Centroid: 40.9613, 28.7450
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 93,
    "duration_minutes": 385.69999999999998863131622783839702606201171875,
    "points": 38,
    "centroid": {
        "lat": 40.9612805710526259872494847513735294342041015625,
        "lon": 28.744982807894739806897632661275565624237060546875
    },
    "bbox": {
        "min_lat": 40.9605217000000010330040822736918926239013671875,
        "min_lon": 28.744751699999998351131580420769751071929931640625,
        "max_lat": 40.9620400000000017826096154749393463134765625,
        "max_lon": 28.745464999999999378132997662760317325592041015625
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 19, 2026 04:24 UTC 55/100
Vessel A: IMO 9884150 (SERGEY LVOV) RUSSIA
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 438 meters
  • Average Distance: 467 meters
  • Duration: 42 minutes
  • Period: 2026-07-19T04:24:58+00:00 to 2026-07-19T05:06:58+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 55/100

Low-confidence STS candidate - may warrant review. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 438m, avg 467m) 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 Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 438m, avg 467m
Duration5/25Duration 42 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±23m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-19T10:45:10.695985+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273295620,
        "imo": 9884150,
        "name": "SERGEY LVOV",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 438.30000000000001136868377216160297393798828125,
    "avg_distance_m": 467.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 22.800000000000000710542735760100185871124267578125,
    "duration_minutes": 42,
    "overlap_duration_s": 2520,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-19T04:24:58+00:00",
        "end": "2026-07-19T05:06:58+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 55,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 438m, avg 467m"
            },
            "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 \u00b123m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Low-confidence STS candidate - may warrant review. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 438m, avg 467m) 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 Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.96349539999999933570506982505321502685546875,
            "lon": 28.745756499999998823113855905830860137939453125
        },
        "time_window": {
            "start_ts": "2026-07-19T04:24:58+00:00",
            "end_ts": "2026-07-19T05:06:58+00:00"
        },
        "searched_at": "2026-07-19T10:45:10.695985+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 04:21 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 27m
  • Data Points: 40 AIS positions
  • Period: 2026-07-19T04:57:11+00:00 to 2026-07-19T11:24:50+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 387.6000000000000227373675443232059478759765625,
    "points_in_zone": 40,
    "first_point": {
        "ts": "2026-07-19T04:57:11+00:00",
        "lat": 40.96153170000000187656041816808283329010009765625,
        "lon": 28.744775000000000630961949354968965053558349609375
    },
    "last_point": {
        "ts": "2026-07-19T11:24:50+00:00",
        "lat": 40.960686699999996562837623059749603271484375,
        "lon": 28.745259999999998257180777727626264095306396484375
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 04:21 UTC 75.0%
  • Duration: 6h 27m
  • Radius: 108 meters
  • Data Points: 40 AIS positions
  • Centroid: 40.9614, 28.7449
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 108,
    "duration_minutes": 387.6000000000000227373675443232059478759765625,
    "points": 40,
    "centroid": {
        "lat": 40.9614158325000090599132818169891834259033203125,
        "lon": 28.744944457499997270133462734520435333251953125
    },
    "bbox": {
        "min_lat": 40.9605217000000010330040822736918926239013671875,
        "min_lon": 28.744775000000000630961949354968965053558349609375,
        "max_lat": 40.9620400000000017826096154749393463134765625,
        "max_lon": 28.745464999999999378132997662760317325592041015625
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 03:25 UTC 75/100
Vessel A: IMO 9221803 (YARA J) COMOROS
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 415 meters
  • Average Distance: 437 meters
  • Duration: 4h 57m
  • Period: 2026-07-19T03:25:59+00:00 to 2026-07-19T08:23:03+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 415m, avg 437m) for 297 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 415m, avg 437m
Duration25/25Duration 297 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±14m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 414.69999999999998863131622783839702606201171875,
    "avg_distance_m": 436.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 13.5,
    "duration_minutes": 297.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 17824,
    "speed_a_avg": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-19T03:25:59+00:00",
        "end": "2026-07-19T08:23:03+00:00"
    },
    "points_count": {
        "vessel_a": 22,
        "vessel_b": 22
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 415m, avg 437m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 297 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b114m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 415m, avg 437m) for 297 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 19, 2026 03:21 UTC 65/100
Vessel A: IMO 9884150 (SERGEY LVOV) RUSSIA
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 438 meters
  • Average Distance: 465 meters
  • Duration: 1h 26m
  • Period: 2026-07-19T03:40:03+00:00 to 2026-07-19T05:06:58+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 65/100

Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 438m, avg 465m) for 87 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 Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 438m, avg 465m
Duration15/25Duration 87 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±17m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-19T09:30:15.884158+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273295620,
        "imo": 9884150,
        "name": "SERGEY LVOV",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 438.30000000000001136868377216160297393798828125,
    "avg_distance_m": 465.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 16.699999999999999289457264239899814128875732421875,
    "duration_minutes": 86.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 5215,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-19T03:40:03+00:00",
        "end": "2026-07-19T05:06:58+00:00"
    },
    "points_count": {
        "vessel_a": 7,
        "vessel_b": 7
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 65,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 438m, avg 465m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 87 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b117m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 438m, avg 465m) for 87 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 Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.962917099999998526982381008565425872802734375,
            "lon": 28.746113199999999920919435680843889713287353515625
        },
        "time_window": {
            "start_ts": "2026-07-19T03:21:09+00:00",
            "end_ts": "2026-07-19T05:06:58+00:00"
        },
        "searched_at": "2026-07-19T09:30:15.884158+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 03:21 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 32m
  • Data Points: 40 AIS positions
  • Period: 2026-07-19T03:51:11+00:00 to 2026-07-19T10:23:52+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 392.69999999999998863131622783839702606201171875,
    "points_in_zone": 40,
    "first_point": {
        "ts": "2026-07-19T03:51:11+00:00",
        "lat": 40.96098669999999941637724987231194972991943359375,
        "lon": 28.744981700000000301997715723700821399688720703125
    },
    "last_point": {
        "ts": "2026-07-19T10:23:52+00:00",
        "lat": 40.9605217000000010330040822736918926239013671875,
        "lon": 28.745450000000001722355591482482850551605224609375
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 03:21 UTC 75.0%
  • Duration: 6h 32m
  • Radius: 118 meters
  • Data Points: 40 AIS positions
  • Centroid: 40.9615, 28.7449
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 117.599999999999994315658113919198513031005859375,
    "duration_minutes": 392.69999999999998863131622783839702606201171875,
    "points": 40,
    "centroid": {
        "lat": 40.96149570750001345231794402934610843658447265625,
        "lon": 28.74490066749999783723978907801210880279541015625
    },
    "bbox": {
        "min_lat": 40.9605217000000010330040822736918926239013671875,
        "min_lon": 28.744775000000000630961949354968965053558349609375,
        "max_lat": 40.9620400000000017826096154749393463134765625,
        "max_lon": 28.745450000000001722355591482482850551605224609375
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 02:19 UTC 75/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9221803 (YARA J) COMOROS
  • Minimum Distance: 428 meters
  • Average Distance: 446 meters
  • Duration: 2h 8m
  • Period: 2026-07-19T02:19:13+00:00 to 2026-07-19T04:27:11+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 428m, avg 446m) for 128 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 428m, avg 446m
Duration25/25Duration 128 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±11m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "min_distance_m": 428.30000000000001136868377216160297393798828125,
    "avg_distance_m": 445.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 11.300000000000000710542735760100185871124267578125,
    "duration_minutes": 128,
    "overlap_duration_s": 7678,
    "speed_a_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_a_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_b_avg": 0.11999999999999999555910790149937383830547332763671875,
    "speed_b_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.11999999999999999555910790149937383830547332763671875,
            "max_sog": 0.299999999999999988897769753748434595763683319091796875
        }
    },
    "time_window": {
        "start": "2026-07-19T02:19:13+00:00",
        "end": "2026-07-19T04:27:11+00:00"
    },
    "points_count": {
        "vessel_a": 10,
        "vessel_b": 10
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 428m, avg 446m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 128 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b111m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 428m, avg 446m) for 128 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 02:01 UTC 75/100
Vessel A: IMO 9884150 (SERGEY LVOV) RUSSIA
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 438 meters
  • Average Distance: 470 meters
  • Duration: 2h 58m
  • Period: 2026-07-19T02:08:03+00:00 to 2026-07-19T05:06:58+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 438m, avg 470m) for 179 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 Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 438m, avg 470m
Duration25/25Duration 179 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±13m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273295620,
        "imo": 9884150,
        "name": "SERGEY LVOV",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 438.30000000000001136868377216160297393798828125,
    "avg_distance_m": 469.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 12.9000000000000003552713678800500929355621337890625,
    "duration_minutes": 178.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 10735,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-19T02:08:03+00:00",
        "end": "2026-07-19T05:06:58+00:00"
    },
    "points_count": {
        "vessel_a": 14,
        "vessel_b": 14
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 438m, avg 470m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 179 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b113m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 438m, avg 470m) for 179 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 Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 02:01 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 34m
  • Data Points: 39 AIS positions
  • Period: 2026-07-19T02:45:10+00:00 to 2026-07-19T09:20:00+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 394.80000000000001136868377216160297393798828125,
    "points_in_zone": 39,
    "first_point": {
        "ts": "2026-07-19T02:45:10+00:00",
        "lat": 40.96087829999999740948624094016849994659423828125,
        "lon": 28.745039999999999480451151612214744091033935546875
    },
    "last_point": {
        "ts": "2026-07-19T09:20:00+00:00",
        "lat": 40.9615000000000009094947017729282379150390625,
        "lon": 28.74486329999999867368387640453875064849853515625
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 02:01 UTC 75.0%
  • Duration: 6h 34m
  • Radius: 79 meters
  • Data Points: 39 AIS positions
  • Centroid: 40.9615, 28.7449
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 78.900000000000005684341886080801486968994140625,
    "duration_minutes": 394.80000000000001136868377216160297393798828125,
    "points": 39,
    "centroid": {
        "lat": 40.9615194410256435730843804776668548583984375,
        "lon": 28.744895258974363372317384346388280391693115234375
    },
    "bbox": {
        "min_lat": 40.9608367000000015423211152665317058563232421875,
        "min_lon": 28.744775000000000630961949354968965053558349609375,
        "max_lat": 40.9620400000000017826096154749393463134765625,
        "max_lon": 28.745181699999999835881681065075099468231201171875
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts🛰️✗ Bosphorus/Dardanelles Approach
Jul 19, 2026 01:04 UTC 70/100
Vessel A: IMO 9221803 (YARA J) COMOROS
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 434 meters
  • Average Distance: 446 meters
  • Duration: 1h 36m
  • Period: 2026-07-19T01:04:56+00:00 to 2026-07-19T02:40:55+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 70/100

Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 434m, avg 446m) for 96 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 434m, avg 446m
Duration20/25Duration 96 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±8m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach

🛰️ Satellite Corroboration

SAR Not Available

No satellite imagery for this time/location

No Sentinel-1 scenes covering AOI and time window

Searched: 2026-07-19T07:30:02.238171+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 434.30000000000001136868377216160297393798828125,
    "avg_distance_m": 446.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 7.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 96,
    "overlap_duration_s": 5759,
    "speed_a_avg": 0.11999999999999999555910790149937383830547332763671875,
    "speed_a_std": 0.11000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.11999999999999999555910790149937383830547332763671875,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-07-19T01:04:56+00:00",
        "end": "2026-07-19T02:40:55+00:00"
    },
    "points_count": {
        "vessel_a": 10,
        "vessel_b": 10
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 70,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 434m, avg 446m"
            },
            "duration": {
                "score": 20,
                "max": 25,
                "detail": "Duration 96 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b18m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 434m, avg 446m) for 96 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    },
    "sar": {
        "status": "not_found",
        "centroid": {
            "lat": 40.95899969999999967740222928114235401153564453125,
            "lon": 28.744175500000000766931407270021736621856689453125
        },
        "time_window": {
            "start_ts": "2026-07-19T01:04:56+00:00",
            "end_ts": "2026-07-19T02:40:55+00:00"
        },
        "searched_at": "2026-07-19T07:30:02.238171+00:00",
        "notes": "No Sentinel-1 scenes covering AOI and time window"
    }
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 01:01 UTC 75/100
Vessel A: IMO 9884150 (SERGEY LVOV) RUSSIA
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 438 meters
  • Average Distance: 469 meters
  • Duration: 3h 13m
  • Period: 2026-07-19T01:53:04+00:00 to 2026-07-19T05:06:58+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 438m, avg 469m) for 194 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 Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 438m, avg 469m
Duration25/25Duration 194 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±12m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273295620,
        "imo": 9884150,
        "name": "SERGEY LVOV",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 438.30000000000001136868377216160297393798828125,
    "avg_distance_m": 468.8999999999999772626324556767940521240234375,
    "distance_consistency_m": 12.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 193.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 11634,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0299999999999999988897769753748434595763683319091796875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-19T01:53:04+00:00",
        "end": "2026-07-19T05:06:58+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 438m, avg 469m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 194 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b112m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 438m, avg 469m) for 194 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 Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 01:01 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 29m
  • Data Points: 40 AIS positions
  • Period: 2026-07-19T01:45:15+00:00 to 2026-07-19T08:15:00+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 389.80000000000001136868377216160297393798828125,
    "points_in_zone": 40,
    "first_point": {
        "ts": "2026-07-19T01:45:15+00:00",
        "lat": 40.960949999999996862243278883397579193115234375,
        "lon": 28.745035000000001446096575818955898284912109375
    },
    "last_point": {
        "ts": "2026-07-19T08:15:00+00:00",
        "lat": 40.96186829999999901019691606052219867706298828125,
        "lon": 28.744945000000001300577423535287380218505859375
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 01:01 UTC 75.0%
  • Duration: 6h 29m
  • Radius: 68 meters
  • Data Points: 40 AIS positions
  • Centroid: 40.9614, 28.7449
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 68.400000000000005684341886080801486968994140625,
    "duration_minutes": 389.80000000000001136868377216160297393798828125,
    "points": 40,
    "centroid": {
        "lat": 40.96142149749999816776835359632968902587890625,
        "lon": 28.74490046249999153360477066598832607269287109375
    },
    "bbox": {
        "min_lat": 40.9608367000000015423211152665317058563232421875,
        "min_lon": 28.744775000000000630961949354968965053558349609375,
        "max_lat": 40.96186829999999901019691606052219867706298828125,
        "max_lon": 28.745181699999999835881681065075099468231201171875
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 00:33 UTC 75/100
Vessel A: IMO 9884150 (SERGEY LVOV) RUSSIA
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 438 meters
  • Average Distance: 469 meters
  • Duration: 4h 9m
  • Period: 2026-07-19T00:57:02+00:00 to 2026-07-19T05:06:58+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 438m, avg 469m) for 250 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 Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 438m, avg 469m
Duration25/25Duration 250 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±11m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273295620,
        "imo": 9884150,
        "name": "SERGEY LVOV",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 438.30000000000001136868377216160297393798828125,
    "avg_distance_m": 469.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 11.300000000000000710542735760100185871124267578125,
    "duration_minutes": 249.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 14996,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-19T00:57:02+00:00",
        "end": "2026-07-19T05:06:58+00:00"
    },
    "points_count": {
        "vessel_a": 20,
        "vessel_b": 20
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 438m, avg 469m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 250 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b111m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 438m, avg 469m) for 250 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 Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 19, 2026 00:01 UTC 75/100
Vessel A: IMO 9221803 (YARA J) COMOROS
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 434 meters
  • Average Distance: 451 meters
  • Duration: 2h 36m
  • Period: 2026-07-19T00:04:56+00:00 to 2026-07-19T02:40:55+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 434m, avg 451m) for 156 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 434m, avg 451m
Duration25/25Duration 156 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 434.30000000000001136868377216160297393798828125,
    "avg_distance_m": 451.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 9.199999999999999289457264239899814128875732421875,
    "duration_minutes": 156,
    "overlap_duration_s": 9359,
    "speed_a_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-07-19T00:04:56+00:00",
        "end": "2026-07-19T02:40:55+00:00"
    },
    "points_count": {
        "vessel_a": 16,
        "vessel_b": 16
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 434m, avg 451m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 156 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 434m, avg 451m) for 156 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 19, 2026 00:01 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 31m
  • Data Points: 39 AIS positions
  • Period: 2026-07-19T00:55:16+00:00 to 2026-07-19T07:27:05+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 391.80000000000001136868377216160297393798828125,
    "points_in_zone": 39,
    "first_point": {
        "ts": "2026-07-19T00:55:16+00:00",
        "lat": 40.96092829999999906931407167576253414154052734375,
        "lon": 28.745129999999999625970303895883262157440185546875
    },
    "last_point": {
        "ts": "2026-07-19T07:27:05+00:00",
        "lat": 40.9618032999999996945916791446506977081298828125,
        "lon": 28.74496669999999909350663074292242527008056640625
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 19, 2026 00:01 UTC 75.0%
  • Duration: 6h 31m
  • Radius: 59 meters
  • Data Points: 39 AIS positions
  • Centroid: 40.9613, 28.7449
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 59,
    "duration_minutes": 391.80000000000001136868377216160297393798828125,
    "points": 39,
    "centroid": {
        "lat": 40.96131482564101844445758615620434284210205078125,
        "lon": 28.74492410769230588130085379816591739654541015625
    },
    "bbox": {
        "min_lat": 40.96080829999999650681274943053722381591796875,
        "min_lon": 28.744775000000000630961949354968965053558349609375,
        "max_lat": 40.9618032999999996945916791446506977081298828125,
        "max_lon": 28.745181699999999835881681065075099468231201171875
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 18, 2026 23:58 UTC 75/100
Vessel A: IMO 9221803 (YARA J) COMOROS
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 434 meters
  • Average Distance: 452 meters
  • Duration: 2h 42m
  • Period: 2026-07-18T23:58:56+00:00 to 2026-07-19T02:40:55+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 434m, avg 452m) for 162 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 434m, avg 452m
Duration25/25Duration 162 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 434.30000000000001136868377216160297393798828125,
    "avg_distance_m": 451.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 9,
    "duration_minutes": 162,
    "overlap_duration_s": 9719,
    "speed_a_avg": 0.1000000000000000055511151231257827021181583404541015625,
    "speed_a_std": 0.0899999999999999966693309261245303787291049957275390625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1000000000000000055511151231257827021181583404541015625,
            "max_sog": 0.40000000000000002220446049250313080847263336181640625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-07-18T23:58:56+00:00",
        "end": "2026-07-19T02:40:55+00:00"
    },
    "points_count": {
        "vessel_a": 17,
        "vessel_b": 17
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 434m, avg 452m"
            },
            "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 \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 434m, avg 452m) for 162 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 18, 2026 23:01 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 29m
  • Data Points: 34 AIS positions
  • Period: 2026-07-18T23:33:15+00:00 to 2026-07-19T06:03:08+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 389.8999999999999772626324556767940521240234375,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-07-18T23:33:15+00:00",
        "lat": 40.961056700000000319050741381943225860595703125,
        "lon": 28.74491499999999888359525357373058795928955078125
    },
    "last_point": {
        "ts": "2026-07-19T06:03:08+00:00",
        "lat": 40.96164499999999719648258178494870662689208984375,
        "lon": 28.74486999999999881083567743189632892608642578125
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 18, 2026 23:01 UTC 75.0%
  • Duration: 6h 29m
  • Radius: 54 meters
  • Data Points: 34 AIS positions
  • Centroid: 40.9612, 28.7449
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 54.10000000000000142108547152020037174224853515625,
    "duration_minutes": 389.8999999999999772626324556767940521240234375,
    "points": 34,
    "centroid": {
        "lat": 40.96119681176469384809024631977081298828125,
        "lon": 28.74494755588235506138516939245164394378662109375
    },
    "bbox": {
        "min_lat": 40.96080829999999650681274943053722381591796875,
        "min_lon": 28.744775000000000630961949354968965053558349609375,
        "max_lat": 40.9616783000000026504494599066674709320068359375,
        "max_lon": 28.745181699999999835881681065075099468231201171875
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 18, 2026 22:56 UTC 75/100
Vessel A: IMO 9884150 (SERGEY LVOV) RUSSIA
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 438 meters
  • Average Distance: 469 meters
  • Duration: 5h 54m
  • Period: 2026-07-18T22:56:57+00:00 to 2026-07-19T04:51:03+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 438m, avg 469m) for 354 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 438m, avg 469m
Duration25/25Duration 354 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±10m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273295620,
        "imo": 9884150,
        "name": "SERGEY LVOV",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 438.30000000000001136868377216160297393798828125,
    "avg_distance_m": 469.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 10.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 354.1000000000000227373675443232059478759765625,
    "overlap_duration_s": 21246,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-18T22:56:57+00:00",
        "end": "2026-07-19T04:51:03+00:00"
    },
    "points_count": {
        "vessel_a": 22,
        "vessel_b": 22
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 438m, avg 469m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 354 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 438m, avg 469m) for 354 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 18, 2026 22:09 UTC 75/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9221803 (YARA J) COMOROS
  • Minimum Distance: 433 meters
  • Average Distance: 451 meters
  • Duration: 3h 39m
  • Period: 2026-07-18T22:09:19+00:00 to 2026-07-19T01:49:14+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 433m, avg 451m) for 220 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 433m, avg 451m
Duration25/25Duration 220 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±8m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "min_distance_m": 433.19999999999998863131622783839702606201171875,
    "avg_distance_m": 450.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 7.5,
    "duration_minutes": 219.900000000000005684341886080801486968994140625,
    "overlap_duration_s": 13195,
    "speed_a_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_a_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_b_avg": 0.13000000000000000444089209850062616169452667236328125,
    "speed_b_std": 0.11999999999999999555910790149937383830547332763671875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        },
        "vessel_b": {
            "avg_sog": 0.13000000000000000444089209850062616169452667236328125,
            "max_sog": 0.5
        }
    },
    "time_window": {
        "start": "2026-07-18T22:09:19+00:00",
        "end": "2026-07-19T01:49:14+00:00"
    },
    "points_count": {
        "vessel_a": 18,
        "vessel_b": 18
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 433m, avg 451m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 220 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b18m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 433m, avg 451m) for 220 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 18, 2026 22:01 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 35m
  • Data Points: 34 AIS positions
  • Period: 2026-07-18T22:43:16+00:00 to 2026-07-19T05:19:08+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 395.8999999999999772626324556767940521240234375,
    "points_in_zone": 34,
    "first_point": {
        "ts": "2026-07-18T22:43:16+00:00",
        "lat": 40.961056700000000319050741381943225860595703125,
        "lon": 28.74492169999999902074705460108816623687744140625
    },
    "last_point": {
        "ts": "2026-07-19T05:19:08+00:00",
        "lat": 40.9615782999999993307937984354794025421142578125,
        "lon": 28.744789999999998286739355535246431827545166015625
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 18, 2026 22:01 UTC 75.0%
  • Duration: 6h 35m
  • Radius: 63 meters
  • Data Points: 34 AIS positions
  • Centroid: 40.9611, 28.7450
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 63.2000000000000028421709430404007434844970703125,
    "duration_minutes": 395.8999999999999772626324556767940521240234375,
    "points": 34,
    "centroid": {
        "lat": 40.961115002941170359918032772839069366455078125,
        "lon": 28.744958388235300361657209577970206737518310546875
    },
    "bbox": {
        "min_lat": 40.96080829999999650681274943053722381591796875,
        "min_lon": 28.744775000000000630961949354968965053558349609375,
        "max_lat": 40.9616783000000026504494599066674709320068359375,
        "max_lon": 28.745181699999999835881681065075099468231201171875
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 18, 2026 21:33 UTC 75/100
Vessel A: IMO 9884150 (SERGEY LVOV) RUSSIA
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 458 meters
  • Average Distance: 472 meters
  • Duration: 5h 52m
  • Period: 2026-07-18T21:59:59+00:00 to 2026-07-19T03:51:59+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 458m, avg 472m) for 352 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 Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 458m, avg 472m
Duration25/25Duration 352 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±7m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273295620,
        "imo": 9884150,
        "name": "SERGEY LVOV",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 458.19999999999998863131622783839702606201171875,
    "avg_distance_m": 472.3999999999999772626324556767940521240234375,
    "distance_consistency_m": 6.70000000000000017763568394002504646778106689453125,
    "duration_minutes": 352,
    "overlap_duration_s": 21120,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.01000000000000000020816681711721685132943093776702880859375,
    "speed_b_std": 0.0299999999999999988897769753748434595763683319091796875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.01000000000000000020816681711721685132943093776702880859375,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-18T21:59:59+00:00",
        "end": "2026-07-19T03:51:59+00:00"
    },
    "points_count": {
        "vessel_a": 23,
        "vessel_b": 23
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 458m, avg 472m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 352 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b17m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 458m, avg 472m) for 352 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 Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Zone Dwell Bosphorus/Dardanelles Approach
Jul 18, 2026 21:09 UTC 80.0%
  • Zone: Bosphorus/Dardanelles Approach
  • Duration: 6h 35m
  • Data Points: 32 AIS positions
  • Period: 2026-07-18T21:51:18+00:00 to 2026-07-19T04:27:11+00:00
Show Raw Evidence JSON
{
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "dwell_minutes": 395.8999999999999772626324556767940521240234375,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-07-18T21:51:18+00:00",
        "lat": 40.961136699999997290433384478092193603515625,
        "lon": 28.744904999999999262172423186711966991424560546875
    },
    "last_point": {
        "ts": "2026-07-19T04:27:11+00:00",
        "lat": 40.961354999999997517079464159905910491943359375,
        "lon": 28.744918299999998367866282933391630649566650390625
    }
}
Methodology: 2026.01.18
Loiter Bosphorus/Dardanelles Approach
Jul 18, 2026 21:09 UTC 75.0%
  • Duration: 6h 35m
  • Radius: 36 meters
  • Data Points: 32 AIS positions
  • Centroid: 40.9610, 28.7450
  • Zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "radius_m": 36.39999999999999857891452847979962825775146484375,
    "duration_minutes": 395.8999999999999772626324556767940521240234375,
    "points": 32,
    "centroid": {
        "lat": 40.9610302156250014604665921069681644439697265625,
        "lon": 28.74497390937500540530891157686710357666015625
    },
    "bbox": {
        "min_lat": 40.96080829999999650681274943053722381591796875,
        "min_lon": 28.744833299999999809415385243482887744903564453125,
        "max_lat": 40.961354999999997517079464159905910491943359375,
        "max_lon": 28.745181699999999835881681065075099468231201171875
    },
    "zone_id": "osint_bosphorus"
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 18, 2026 21:04 UTC 75/100
Vessel A: IMO 9221803 (YARA J) COMOROS
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 432 meters
  • Average Distance: 449 meters
  • Duration: 2h 36m
  • Period: 2026-07-18T21:04:56+00:00 to 2026-07-18T23:40:57+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 432m, avg 449m) for 156 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 432m, avg 449m
Duration25/25Duration 156 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±10m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 431.8999999999999772626324556767940521240234375,
    "avg_distance_m": 449.30000000000001136868377216160297393798828125,
    "distance_consistency_m": 9.800000000000000710542735760100185871124267578125,
    "duration_minutes": 156,
    "overlap_duration_s": 9361,
    "speed_a_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_a_std": 0.14000000000000001332267629550187848508358001708984375,
    "speed_b_avg": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_b_std": 0.040000000000000000832667268468867405317723751068115234375,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.5
        },
        "vessel_b": {
            "avg_sog": 0.0200000000000000004163336342344337026588618755340576171875,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-07-18T21:04:56+00:00",
        "end": "2026-07-18T23:40:57+00:00"
    },
    "points_count": {
        "vessel_a": 14,
        "vessel_b": 14
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 432m, avg 449m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 156 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (YARA J and SAMANYOLU) maintained close proximity (min 432m, avg 449m) for 156 minutes. Both vessels were slow-moving (avg speeds 0.1 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 18, 2026 20:31 UTC 60/100
Vessel A: IMO 9359569 (SAMANYOLU) PALAU
Vessel B: IMO 9221803 (YARA J) COMOROS
  • Minimum Distance: 446 meters
  • Average Distance: 459 meters
  • Duration: 48 minutes
  • Period: 2026-07-18T20:31:16+00:00 to 2026-07-18T21:19:17+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.1 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 60/100

Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 446m, avg 459m) for 48 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 446m, avg 459m
Duration10/25Duration 48 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±17m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "vessel_b": {
        "mmsi": 620800363,
        "imo": 9221803,
        "name": "YARA J",
        "flag": "COMOROS"
    },
    "min_distance_m": 445.69999999999998863131622783839702606201171875,
    "avg_distance_m": 458.6000000000000227373675443232059478759765625,
    "distance_consistency_m": 16.699999999999999289457264239899814128875732421875,
    "duration_minutes": 48,
    "overlap_duration_s": 2881,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.14000000000000001332267629550187848508358001708984375,
    "speed_b_std": 0.05000000000000000277555756156289135105907917022705078125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.14000000000000001332267629550187848508358001708984375,
            "max_sog": 0.200000000000000011102230246251565404236316680908203125
        }
    },
    "time_window": {
        "start": "2026-07-18T20:31:16+00:00",
        "end": "2026-07-18T21:19:17+00:00"
    },
    "points_count": {
        "vessel_a": 5,
        "vessel_b": 5
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 60,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 446m, avg 459m"
            },
            "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 \u00b117m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SAMANYOLU and YARA J) maintained close proximity (min 446m, avg 459m) for 48 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.1 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18
Sts Bosphorus/Dardanelles Approach
Jul 18, 2026 20:07 UTC 75/100
Vessel A: IMO 9884150 (SERGEY LVOV) RUSSIA
Vessel B: IMO 9359569 (SAMANYOLU) PALAU
  • Minimum Distance: 458 meters
  • Average Distance: 478 meters
  • Duration: 6h 7m
  • Period: 2026-07-18T20:17:57+00:00 to 2026-07-19T02:24:58+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Bosphorus/Dardanelles Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 458m, avg 478m) for 367 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 Bosphorus/Dardanelles Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness5/25Min distance 458m, avg 478m
Duration25/25Duration 367 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±10m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Bosphorus/Dardanelles Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273295620,
        "imo": 9884150,
        "name": "SERGEY LVOV",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 511101642,
        "imo": 9359569,
        "name": "SAMANYOLU",
        "flag": "PALAU"
    },
    "min_distance_m": 458.19999999999998863131622783839702606201171875,
    "avg_distance_m": 478.19999999999998863131622783839702606201171875,
    "distance_consistency_m": 10.0999999999999996447286321199499070644378662109375,
    "duration_minutes": 367,
    "overlap_duration_s": 22021,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-07-18T20:17:57+00:00",
        "end": "2026-07-19T02:24:58+00:00"
    },
    "points_count": {
        "vessel_a": 25,
        "vessel_b": 25
    },
    "zone_id": "osint_bosphorus",
    "zone_name": "Bosphorus\/Dardanelles Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 5,
                "max": 25,
                "detail": "Min distance 458m, avg 478m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 367 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b110m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Bosphorus\/Dardanelles Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (SERGEY LVOV and SAMANYOLU) maintained close proximity (min 458m, avg 478m) for 367 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 Bosphorus\/Dardanelles Approach, a known STS activity area."
    }
}
Methodology: 2026.01.18

Recent Position Data

Time (UTC) Lat Lon Speed Course Zone
Jul 22 21:19 40.7329 28.6848 6.2 kn 191.3° Bosphorus/Dardanelles Approach
Jul 22 21:18 40.7360 28.6857 6.1 kn 192.3° Bosphorus/Dardanelles Approach
Jul 22 20:09 40.6985 28.6733 1.7 kn 208.1° Bosphorus/Dardanelles Approach
Jul 22 08:37 40.7271 28.6706 0.6 kn 198.1° Bosphorus/Dardanelles Approach
Jul 22 08:34 40.7276 28.6708 0.6 kn 192.6° Bosphorus/Dardanelles Approach
Jul 22 08:32 40.7280 28.6709 0.6 kn 195.9° Bosphorus/Dardanelles Approach
Jul 22 08:28 40.7286 28.6711 0.6 kn 185.8° Bosphorus/Dardanelles Approach
Jul 22 08:26 40.7290 28.6711 0.6 kn 191.7° Bosphorus/Dardanelles Approach
Jul 22 08:24 40.7293 28.6711 0.5 kn 190.0° Bosphorus/Dardanelles Approach
Jul 22 08:21 40.7298 28.6713 0.6 kn 191.0° Bosphorus/Dardanelles Approach
Jul 22 08:18 40.7303 28.6714 0.6 kn 191.9° Bosphorus/Dardanelles Approach
Jul 22 08:15 40.7307 28.6715 0.5 kn 190.6° Bosphorus/Dardanelles Approach
Jul 22 08:13 40.7311 28.6716 0.6 kn 184.7° Bosphorus/Dardanelles Approach
Jul 22 08:11 40.7315 28.6717 0.6 kn 188.4° Bosphorus/Dardanelles Approach
Jul 22 08:08 40.7319 28.6718 0.5 kn 193.9° Bosphorus/Dardanelles Approach
Jul 22 08:06 40.7322 28.6719 0.5 kn 197.6° Bosphorus/Dardanelles Approach
Jul 22 08:04 40.7326 28.6720 0.5 kn 189.7° Bosphorus/Dardanelles Approach
Jul 22 08:01 40.7331 28.6720 0.5 kn 176.5° Bosphorus/Dardanelles Approach
Jul 22 07:59 40.7334 28.6720 0.4 kn 186.9° Bosphorus/Dardanelles Approach
Jul 22 07:56 40.7336 28.6721 0.4 kn 185.3° Bosphorus/Dardanelles Approach

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.