Thoth

IMO 9164718

Vessel information

Vessel Name Thoth View name history 📜
IMO Number 9164718
MMSI 273253080
Vessel Type Chemical/ Products Tanker| Transporteur de produits chimiques
Flag 🇷🇺 Russia View flag history 📜
Call Sign UADB9
Gross Tonnage 4,667 GT
Year Built 1999

Sanctioned by

Company & Ownership

🏢
Caird Seafaring Ltd
IMO Company: 0036366
Address C/O: LLC 'Kontur SPB' (OOO 'Kontur-SPB') Office 533, prospekt Yuriya Gagarina 1, St Petersburg, 196105, Russia.
Status Active
Fleet 1.0 owner, 0.0 operator, 0.0 manager, 0.0 beneficial

Management & Operations

ISM Manager
KONTUR-SPB OOO
Office 533, prospekt Yuriya Gagarina 1, St Petersburg, 196105, Russia.
Commercial Manager
KONTUR-SPB OOO

Classification & Safety

Current Classification
Russian Maritime Register of Shipping Delivered

Port State Control (PSC) Inspections

⚠️
Risk Level
LOW
Last 36 Months
Last Inspection
📍 Tarragona
📅 2021-11-02

Survey Renewal & Certificates

Code Type Issuer Issued Expires
512 Minimum Safe Manning Document Malta 08/02/2021 14/11/2026

Programs & Notes

EU Russia Sanctions – Shadow Fleet | SEMA (Canada) — vessel designations

Vessel Changes

7 changes

AIS Events

50 events detected • 1 zone • Last: Aug 30, 2026

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 17:22 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 3h 8m
  • Data Points: 14 AIS positions
  • Period: 2026-08-30T17:22:40+00:00 to 2026-08-30T20:31:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 188.5,
    "points_in_zone": 14,
    "first_point": {
        "ts": "2026-08-30T17:22:40+00:00",
        "lat": 59.87672830000000345762600773014128208160400390625,
        "lon": 30.220330000000000580939740757457911968231201171875
    },
    "last_point": {
        "ts": "2026-08-30T20:31:10+00:00",
        "lat": 59.9020450000000010959411156363785266876220703125,
        "lon": 30.097773300000000062937033362686634063720703125
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 15:10 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 5h 20m
  • Data Points: 17 AIS positions
  • Period: 2026-08-30T15:10:59+00:00 to 2026-08-30T20:31:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 320.19999999999998863131622783839702606201171875,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-08-30T15:10:59+00:00",
        "lat": 59.8767117000000013149474398232996463775634765625,
        "lon": 30.220314999999999372448655776679515838623046875
    },
    "last_point": {
        "ts": "2026-08-30T20:31:10+00:00",
        "lat": 59.9020450000000010959411156363785266876220703125,
        "lon": 30.097773300000000062937033362686634063720703125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 14:08 UTC 75.0%
  • Duration: 5h 51m
  • Radius: 1,038 meters
  • Data Points: 16 AIS positions
  • Centroid: 59.8775, 30.2191
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 1038,
    "duration_minutes": 351.69999999999998863131622783839702606201171875,
    "points": 16,
    "centroid": {
        "lat": 59.87751051249998823777787038125097751617431640625,
        "lon": 30.219093631250000697718860465101897716522216796875
    },
    "bbox": {
        "min_lat": 59.87669000000000352201823261566460132598876953125,
        "min_lon": 30.207983299999998649809640482999384403228759765625,
        "max_lat": 59.884968299999997043414623476564884185791015625,
        "max_lon": 30.22038330000000172503860085271298885345458984375
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 14:08 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 23m
  • Data Points: 24 AIS positions
  • Period: 2026-08-30T14:08:01+00:00 to 2026-08-30T20:31:10+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 383.1000000000000227373675443232059478759765625,
    "points_in_zone": 24,
    "first_point": {
        "ts": "2026-08-30T14:08:01+00:00",
        "lat": 59.8766949999999980036591296084225177764892578125,
        "lon": 30.22030829999999923529685474932193756103515625
    },
    "last_point": {
        "ts": "2026-08-30T20:31:10+00:00",
        "lat": 59.9020450000000010959411156363785266876220703125,
        "lon": 30.097773300000000062937033362686634063720703125
    }
}

Methodology: 2026.01.18

Sts Ust-Luga/St. Petersburg Approach Aug 30, 2026 14:03 UTC 92/100
Vessel A: Thoth (THOTH) Russia
Vessel B: IMO 8033089 (SGV FLOT) Russia
  • Minimum Distance: 90 meters
  • Average Distance: 121 meters
  • Duration: 3h 19m
  • Period: 2026-08-30T14:40:19+00:00 to 2026-08-30T17:59:51+00:00
  • Vessel A Avg Speed: 0.2 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 92/100

High-confidence STS candidate. Two tankers (THOTH and SGV FLOT) maintained close proximity (min 90m, avg 121m) for 200 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 Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 90m, avg 121m
Duration25/25Duration 200 minutes
Speed Stability17/20both nearly stationary; stable speeds
Distance Consistency15/15Distance variance ±12m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273253080,
        "imo": 9164718,
        "name": "THOTH",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273458830,
        "imo": 8033089,
        "name": "SGV FLOT",
        "flag": "Russia"
    },
    "min_distance_m": 90.099999999999994315658113919198513031005859375,
    "avg_distance_m": 121.099999999999994315658113919198513031005859375,
    "distance_consistency_m": 12.4000000000000003552713678800500929355621337890625,
    "duration_minutes": 199.5,
    "overlap_duration_s": 11972,
    "speed_a_avg": 0.1499999999999999944488848768742172978818416595458984375,
    "speed_a_std": 0.34999999999999997779553950749686919152736663818359375,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.1499999999999999944488848768742172978818416595458984375,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-30T14:40:19+00:00",
        "end": "2026-08-30T17:59:51+00:00"
    },
    "points_count": {
        "vessel_a": 10,
        "vessel_b": 10
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 92,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 90m, avg 121m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 200 minutes"
            },
            "speed_stability": {
                "score": 17,
                "max": 20,
                "detail": "both nearly stationary; 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: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (THOTH and SGV FLOT) maintained close proximity (min 90m, avg 121m) for 200 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 Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 13:09 UTC 75.0%
  • Duration: 6h 32m
  • Radius: 1,045 meters
  • Data Points: 17 AIS positions
  • Centroid: 59.8775, 30.2192
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 1044.59999999999990905052982270717620849609375,
    "duration_minutes": 392.19999999999998863131622783839702606201171875,
    "points": 17,
    "centroid": {
        "lat": 59.8774629352941047955027897842228412628173828125,
        "lon": 30.21916478823529672581571503542363643646240234375
    },
    "bbox": {
        "min_lat": 59.87669000000000352201823261566460132598876953125,
        "min_lon": 30.207983299999998649809640482999384403228759765625,
        "max_lat": 59.884968299999997043414623476564884185791015625,
        "max_lon": 30.22038330000000172503860085271298885345458984375
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 13:09 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 32m
  • Data Points: 17 AIS positions
  • Period: 2026-08-30T13:27:31+00:00 to 2026-08-30T19:59:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 392.19999999999998863131622783839702606201171875,
    "points_in_zone": 17,
    "first_point": {
        "ts": "2026-08-30T13:27:31+00:00",
        "lat": 59.8767016999999981408109306357800960540771484375,
        "lon": 30.220303300000001200942278956063091754913330078125
    },
    "last_point": {
        "ts": "2026-08-30T19:59:41+00:00",
        "lat": 59.884968299999997043414623476564884185791015625,
        "lon": 30.207983299999998649809640482999384403228759765625
    }
}

Methodology: 2026.01.18

Sts🛰️? Ust-Luga/St. Petersburg Approach Aug 30, 2026 13:09 UTC 73/100
Vessel A: Thoth (THOTH) Russia
Vessel B: MMSI 273353550 (EUROSTAR 4 MARIA) RUSSIA
  • Minimum Distance: 160 meters
  • Average Distance: 163 meters
  • Duration: 58 minutes
  • Period: 2026-08-30T13:09:21+00:00 to 2026-08-30T14:08:01+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.6 knots
  • Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 73/100

Moderate-confidence STS candidate. Two tankers (THOTH and EUROSTAR 4 MARIA) maintained close proximity (min 160m, avg 163m) for 59 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.6 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness20/25Min distance 160m, avg 163m
Duration10/25Duration 59 minutes
Speed Stability18/20both very slow; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Ust-Luga/St. Petersburg Approach

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1D_IW_GRDH_1SDV_20260830T041653_20260830T041718_004350_00807C_AC9F_COG • Acquired: 2026-08-30T04:16:53.836340Z • Platform: sentinel-1d

Searched: 2026-08-30T16:30:01.395775+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273253080,
        "imo": 9164718,
        "name": "THOTH",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273353550,
        "name": "EUROSTAR 4 MARIA",
        "flag": "RUSSIA"
    },
    "min_distance_m": 159.599999999999994315658113919198513031005859375,
    "avg_distance_m": 163.400000000000005684341886080801486968994140625,
    "distance_consistency_m": 3.399999999999999911182158029987476766109466552734375,
    "duration_minutes": 58.7000000000000028421709430404007434844970703125,
    "overlap_duration_s": 3520,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0.56999999999999995115018691649311222136020660400390625,
    "speed_b_std": 0.2099999999999999922284388276239042170345783233642578125,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0.56999999999999995115018691649311222136020660400390625,
            "max_sog": 0.8000000000000000444089209850062616169452667236328125
        }
    },
    "time_window": {
        "start": "2026-08-30T13:09:21+00:00",
        "end": "2026-08-30T14:08:01+00:00"
    },
    "points_count": {
        "vessel_a": 4,
        "vessel_b": 4
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 73,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 160m, avg 163m"
            },
            "duration": {
                "score": 10,
                "max": 25,
                "detail": "Duration 59 minutes"
            },
            "speed_stability": {
                "score": 18,
                "max": 20,
                "detail": "both very slow; 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: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (THOTH and EUROSTAR 4 MARIA) maintained close proximity (min 160m, avg 163m) for 59 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.6 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.8767196000000012645614333450794219970703125,
            "lon": 30.2217614999999995006874087266623973846435546875
        },
        "time_window": {
            "start_ts": "2026-08-30T13:09:21+00:00",
            "end_ts": "2026-08-30T14:08:01+00:00"
        },
        "searched_at": "2026-08-30T16:30:01.395775+00:00",
        "scene_id": "S1D_IW_GRDH_1SDV_20260830T041653_20260830T041718_004350_00807C_AC9F_COG",
        "scene_datetime": "2026-08-30T04:16:53.836340Z",
        "platform": "sentinel-1d",
        "bbox": {
            "min_lon": 28.508894000000001511807568022049963474273681640625,
            "min_lat": 58.78304299999999926740201772190630435943603515625,
            "max_lon": 33.7275240000000025020199245773255825042724609375,
            "max_lat": 60.70922500000000354702933691442012786865234375
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1168684_thumbnail_20260830163006.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1168684_thumbnail_20260830163006.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Methodology: 2026.01.18

Sts Ust-Luga/St. Petersburg Approach Aug 30, 2026 12:32 UTC 95/100
Vessel A: Thoth (THOTH) Russia
Vessel B: IMO 8033089 (SGV FLOT) Russia
  • Minimum Distance: 90 meters
  • Average Distance: 123 meters
  • Duration: 5h 1m
  • Period: 2026-08-30T12:58:41+00:00 to 2026-08-30T17:59:51+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (THOTH and SGV FLOT) maintained close proximity (min 90m, avg 123m) for 301 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 Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 90m, avg 123m
Duration25/25Duration 301 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±9m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273253080,
        "imo": 9164718,
        "name": "THOTH",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273458830,
        "imo": 8033089,
        "name": "SGV FLOT",
        "flag": "Russia"
    },
    "min_distance_m": 90.099999999999994315658113919198513031005859375,
    "avg_distance_m": 122.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 9.300000000000000710542735760100185871124267578125,
    "duration_minutes": 301.19999999999998863131622783839702606201171875,
    "overlap_duration_s": 18070,
    "speed_a_avg": 0.08000000000000000166533453693773481063544750213623046875,
    "speed_a_std": 0.2600000000000000088817841970012523233890533447265625,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.08000000000000000166533453693773481063544750213623046875,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-30T12:58:41+00:00",
        "end": "2026-08-30T17:59:51+00:00"
    },
    "points_count": {
        "vessel_a": 18,
        "vessel_b": 18
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 90m, avg 123m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 301 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b19m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (THOTH and SGV FLOT) maintained close proximity (min 90m, avg 123m) for 301 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 Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 12:06 UTC 75.0%
  • Duration: 5h 53m
  • Radius: 108 meters
  • Data Points: 23 AIS positions
  • Centroid: 59.8768, 30.2202
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 108.400000000000005684341886080801486968994140625,
    "duration_minutes": 353.69999999999998863131622783839702606201171875,
    "points": 23,
    "centroid": {
        "lat": 59.87677521739131947242640308104455471038818359375,
        "lon": 30.220235426086954788615912548266351222991943359375
    },
    "bbox": {
        "min_lat": 59.87668670000000048503352445550262928009033203125,
        "min_lon": 30.21903830000000112931957119144499301910400390625,
        "max_lat": 59.87754000000000331738192471675574779510498046875,
        "max_lon": 30.22038330000000172503860085271298885345458984375
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 12:06 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 5h 53m
  • Data Points: 23 AIS positions
  • Period: 2026-08-30T12:06:11+00:00 to 2026-08-30T17:59:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 353.69999999999998863131622783839702606201171875,
    "points_in_zone": 23,
    "first_point": {
        "ts": "2026-08-30T12:06:11+00:00",
        "lat": 59.876699999999999590727384202182292938232421875,
        "lon": 30.220314999999999372448655776679515838623046875
    },
    "last_point": {
        "ts": "2026-08-30T17:59:51+00:00",
        "lat": 59.87686000000000063892002799548208713531494140625,
        "lon": 30.22038330000000172503860085271298885345458984375
    }
}

Methodology: 2026.01.18

Sts Ust-Luga/St. Petersburg Approach Aug 30, 2026 11:24 UTC 95/100
Vessel A: Thoth (THOTH) Russia
Vessel B: IMO 8033089 (SGV FLOT) Russia
  • Minimum Distance: 90 meters
  • Average Distance: 124 meters
  • Duration: 6h 4m
  • Period: 2026-08-30T11:55:20+00:00 to 2026-08-30T17:59:51+00:00
  • Vessel A Avg Speed: 0.1 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 95/100

High-confidence STS candidate. Two tankers (THOTH and SGV FLOT) maintained close proximity (min 90m, avg 124m) for 364 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 Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness25/25Min distance 90m, avg 124m
Duration25/25Duration 364 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±8m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273253080,
        "imo": 9164718,
        "name": "THOTH",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273458830,
        "imo": 8033089,
        "name": "SGV FLOT",
        "flag": "Russia"
    },
    "min_distance_m": 90.099999999999994315658113919198513031005859375,
    "avg_distance_m": 123.7999999999999971578290569595992565155029296875,
    "distance_consistency_m": 8.199999999999999289457264239899814128875732421875,
    "duration_minutes": 364.5,
    "overlap_duration_s": 21871,
    "speed_a_avg": 0.059999999999999997779553950749686919152736663818359375,
    "speed_a_std": 0.2300000000000000099920072216264088638126850128173828125,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0.059999999999999997779553950749686919152736663818359375,
            "max_sog": 1.100000000000000088817841970012523233890533447265625
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-30T11:55:20+00:00",
        "end": "2026-08-30T17:59:51+00:00"
    },
    "points_count": {
        "vessel_a": 24,
        "vessel_b": 24
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 95,
        "components": {
            "distance_tightness": {
                "score": 25,
                "max": 25,
                "detail": "Min distance 90m, avg 124m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 364 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: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (THOTH and SGV FLOT) maintained close proximity (min 90m, avg 124m) for 364 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 Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 11:16 UTC 75.0%
  • Duration: 6h 25m
  • Radius: 110 meters
  • Data Points: 28 AIS positions
  • Centroid: 59.8768, 30.2202
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 110.099999999999994315658113919198513031005859375,
    "duration_minutes": 385.19999999999998863131622783839702606201171875,
    "points": 28,
    "centroid": {
        "lat": 59.87676131071429352914492483250796794891357421875,
        "lon": 30.220248982142866367439637542702257633209228515625
    },
    "bbox": {
        "min_lat": 59.87668670000000048503352445550262928009033203125,
        "min_lon": 30.21903830000000112931957119144499301910400390625,
        "max_lat": 59.87754000000000331738192471675574779510498046875,
        "max_lon": 30.22038330000000172503860085271298885345458984375
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 11:16 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 25m
  • Data Points: 28 AIS positions
  • Period: 2026-08-30T11:34:40+00:00 to 2026-08-30T17:59:51+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 385.19999999999998863131622783839702606201171875,
    "points_in_zone": 28,
    "first_point": {
        "ts": "2026-08-30T11:34:40+00:00",
        "lat": 59.876699999999999590727384202182292938232421875,
        "lon": 30.2203133000000008223651093430817127227783203125
    },
    "last_point": {
        "ts": "2026-08-30T17:59:51+00:00",
        "lat": 59.87686000000000063892002799548208713531494140625,
        "lon": 30.22038330000000172503860085271298885345458984375
    }
}

Methodology: 2026.01.18

Sts Ust-Luga/St. Petersburg Approach Aug 30, 2026 10:13 UTC 90/100
Vessel A: Thoth (THOTH) Russia
Vessel B: IMO 8033089 (SGV FLOT) Russia
  • Minimum Distance: 124 meters
  • Average Distance: 126 meters
  • Duration: 4h 58m
  • Period: 2026-08-30T10:18:11+00:00 to 2026-08-30T15:16:41+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (THOTH and SGV FLOT) maintained close proximity (min 124m, avg 126m) for 298 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 Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness20/25Min distance 124m, avg 126m
Duration25/25Duration 298 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273253080,
        "imo": 9164718,
        "name": "THOTH",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273458830,
        "imo": 8033089,
        "name": "SGV FLOT",
        "flag": "Russia"
    },
    "min_distance_m": 123.7999999999999971578290569595992565155029296875,
    "avg_distance_m": 126.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 1.100000000000000088817841970012523233890533447265625,
    "duration_minutes": 298.5,
    "overlap_duration_s": 17910,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-30T10:18:11+00:00",
        "end": "2026-08-30T15:16:41+00:00"
    },
    "points_count": {
        "vessel_a": 35,
        "vessel_b": 35
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 124m, avg 126m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 298 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (THOTH and SGV FLOT) maintained close proximity (min 124m, avg 126m) for 298 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 Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 10:06 UTC 75.0%
  • Duration: 6h 39m
  • Radius: 114 meters
  • Data Points: 32 AIS positions
  • Centroid: 59.8767, 30.2203
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 114.099999999999994315658113919198513031005859375,
    "duration_minutes": 399.30000000000001136868377216160297393798828125,
    "points": 32,
    "centroid": {
        "lat": 59.87672546875000278987499768845736980438232421875,
        "lon": 30.220273587500006584605216630734503269195556640625
    },
    "bbox": {
        "min_lat": 59.87668670000000048503352445550262928009033203125,
        "min_lon": 30.21903830000000112931957119144499301910400390625,
        "max_lat": 59.87754000000000331738192471675574779510498046875,
        "max_lon": 30.220330000000000580939740757457911968231201171875
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 10:06 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 39m
  • Data Points: 32 AIS positions
  • Period: 2026-08-30T10:50:03+00:00 to 2026-08-30T17:29:20+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 399.30000000000001136868377216160297393798828125,
    "points_in_zone": 32,
    "first_point": {
        "ts": "2026-08-30T10:50:03+00:00",
        "lat": 59.8766983000000010406438377685844898223876953125,
        "lon": 30.220318299999998856719685136340558528900146484375
    },
    "last_point": {
        "ts": "2026-08-30T17:29:20+00:00",
        "lat": 59.87754000000000331738192471675574779510498046875,
        "lon": 30.21903830000000112931957119144499301910400390625
    }
}

Methodology: 2026.01.18

Sts Ust-Luga/St. Petersburg Approach Aug 30, 2026 09:17 UTC 90/100
Vessel A: Thoth (THOTH) Russia
Vessel B: IMO 8033089 (SGV FLOT) Russia
  • Minimum Distance: 124 meters
  • Average Distance: 126 meters
  • Duration: 5h 59m
  • Period: 2026-08-30T09:17:20+00:00 to 2026-08-30T15:16:41+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 90/100

High-confidence STS candidate. Two tankers (THOTH and SGV FLOT) maintained close proximity (min 124m, avg 126m) for 359 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 Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness20/25Min distance 124m, avg 126m
Duration25/25Duration 359 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±1m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273253080,
        "imo": 9164718,
        "name": "THOTH",
        "flag": "Russia"
    },
    "vessel_b": {
        "mmsi": 273458830,
        "imo": 8033089,
        "name": "SGV FLOT",
        "flag": "Russia"
    },
    "min_distance_m": 123.7999999999999971578290569595992565155029296875,
    "avg_distance_m": 126.2000000000000028421709430404007434844970703125,
    "distance_consistency_m": 1,
    "duration_minutes": 359.3999999999999772626324556767940521240234375,
    "overlap_duration_s": 21561,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0.0200000000000000004163336342344337026588618755340576171875,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0.1000000000000000055511151231257827021181583404541015625
        }
    },
    "time_window": {
        "start": "2026-08-30T09:17:20+00:00",
        "end": "2026-08-30T15:16:41+00:00"
    },
    "points_count": {
        "vessel_a": 43,
        "vessel_b": 43
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 90,
        "components": {
            "distance_tightness": {
                "score": 20,
                "max": 25,
                "detail": "Min distance 124m, avg 126m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 359 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b11m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (THOTH and SGV FLOT) maintained close proximity (min 124m, avg 126m) for 359 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 Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 09:02 UTC 75.0%
  • Duration: 6h 14m
  • Radius: 2 meters
  • Data Points: 44 AIS positions
  • Centroid: 59.8767, 30.2203
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 374.30000000000001136868377216160297393798828125,
    "points": 44,
    "centroid": {
        "lat": 59.87669980909090128307070699520409107208251953125,
        "lon": 30.2203165159090900715455063618719577789306640625
    },
    "bbox": {
        "min_lat": 59.87668670000000048503352445550262928009033203125,
        "min_lon": 30.22029500000000012960299500264227390289306640625,
        "max_lat": 59.87671499999999724650479038245975971221923828125,
        "max_lon": 30.220331699999999131023287191055715084075927734375
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 09:02 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 14m
  • Data Points: 44 AIS positions
  • Period: 2026-08-30T09:02:21+00:00 to 2026-08-30T15:16:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 374.30000000000001136868377216160297393798828125,
    "points_in_zone": 44,
    "first_point": {
        "ts": "2026-08-30T09:02:21+00:00",
        "lat": 59.87670829999999710935298935510218143463134765625,
        "lon": 30.220324999999998993871486163698136806488037109375
    },
    "last_point": {
        "ts": "2026-08-30T15:16:41+00:00",
        "lat": 59.876703300000002627712092362344264984130859375,
        "lon": 30.220311699999999888177626417018473148345947265625
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 08:03 UTC 75.0%
  • Duration: 6h 34m
  • Radius: 2 meters
  • Data Points: 50 AIS positions
  • Centroid: 59.8767, 30.2203
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 1.600000000000000088817841970012523233890533447265625,
    "duration_minutes": 394.69999999999998863131622783839702606201171875,
    "points": 50,
    "centroid": {
        "lat": 59.87670126599999775862670503556728363037109375,
        "lon": 30.2203171000000025969711714424192905426025390625
    },
    "bbox": {
        "min_lat": 59.87668670000000048503352445550262928009033203125,
        "min_lon": 30.22029500000000012960299500264227390289306640625,
        "max_lat": 59.87671499999999724650479038245975971221923828125,
        "max_lon": 30.22033499999999861529431655071675777435302734375
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 08:03 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 34m
  • Data Points: 50 AIS positions
  • Period: 2026-08-30T08:42:00+00:00 to 2026-08-30T15:16:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 394.69999999999998863131622783839702606201171875,
    "points_in_zone": 50,
    "first_point": {
        "ts": "2026-08-30T08:42:00+00:00",
        "lat": 59.87671329999999869642124394886195659637451171875,
        "lon": 30.220314999999999372448655776679515838623046875
    },
    "last_point": {
        "ts": "2026-08-30T15:16:41+00:00",
        "lat": 59.876703300000002627712092362344264984130859375,
        "lon": 30.220311699999999888177626417018473148345947265625
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 07:05 UTC 75.0%
  • Duration: 6h 33m
  • Radius: 2 meters
  • Data Points: 55 AIS positions
  • Centroid: 59.8767, 30.2203
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 393.5,
    "points": 55,
    "centroid": {
        "lat": 59.87670306181816926027750014327466487884521484375,
        "lon": 30.22031669636363204745066468603909015655517578125
    },
    "bbox": {
        "min_lat": 59.87668670000000048503352445550262928009033203125,
        "min_lon": 30.22029500000000012960299500264227390289306640625,
        "max_lat": 59.87671499999999724650479038245975971221923828125,
        "max_lon": 30.22033499999999861529431655071675777435302734375
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 07:05 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 33m
  • Data Points: 55 AIS positions
  • Period: 2026-08-30T07:50:30+00:00 to 2026-08-30T14:24:00+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 393.5,
    "points_in_zone": 55,
    "first_point": {
        "ts": "2026-08-30T07:50:30+00:00",
        "lat": 59.87670829999999710935298935510218143463134765625,
        "lon": 30.22030829999999923529685474932193756103515625
    },
    "last_point": {
        "ts": "2026-08-30T14:24:00+00:00",
        "lat": 59.87669170000000207210177904926240444183349609375,
        "lon": 30.2203133000000008223651093430817127227783203125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 06:04 UTC 75.0%
  • Duration: 6h 28m
  • Radius: 2 meters
  • Data Points: 61 AIS positions
  • Centroid: 59.8767, 30.2203
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 2,
    "duration_minutes": 388.5,
    "points": 61,
    "centroid": {
        "lat": 59.8767047016393263447753270156681537628173828125,
        "lon": 30.22031535573770355540546006523072719573974609375
    },
    "bbox": {
        "min_lat": 59.87668670000000048503352445550262928009033203125,
        "min_lon": 30.22029330000000157951944856904447078704833984375,
        "max_lat": 59.87671499999999724650479038245975971221923828125,
        "max_lon": 30.22033499999999861529431655071675777435302734375
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 06:04 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 28m
  • Data Points: 61 AIS positions
  • Period: 2026-08-30T06:59:00+00:00 to 2026-08-30T13:27:31+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 388.5,
    "points_in_zone": 61,
    "first_point": {
        "ts": "2026-08-30T06:59:00+00:00",
        "lat": 59.8767117000000013149474398232996463775634765625,
        "lon": 30.220314999999999372448655776679515838623046875
    },
    "last_point": {
        "ts": "2026-08-30T13:27:31+00:00",
        "lat": 59.8767016999999981408109306357800960540771484375,
        "lon": 30.220303300000001200942278956063091754913330078125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 05:03 UTC 75.0%
  • Duration: 6h 25m
  • Radius: 2 meters
  • Data Points: 63 AIS positions
  • Centroid: 59.8767, 30.2203
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 1.8000000000000000444089209850062616169452667236328125,
    "duration_minutes": 385.69999999999998863131622783839702606201171875,
    "points": 63,
    "centroid": {
        "lat": 59.8767064031745803731610067188739776611328125,
        "lon": 30.2203152380952388966761645860970020294189453125
    },
    "bbox": {
        "min_lat": 59.87669170000000207210177904926240444183349609375,
        "min_lon": 30.22029330000000157951944856904447078704833984375,
        "max_lat": 59.87672169999999738365659140981733798980712890625,
        "max_lon": 30.22033499999999861529431655071675777435302734375
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 05:03 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 25m
  • Data Points: 63 AIS positions
  • Period: 2026-08-30T05:47:00+00:00 to 2026-08-30T12:12:41+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 385.69999999999998863131622783839702606201171875,
    "points_in_zone": 63,
    "first_point": {
        "ts": "2026-08-30T05:47:00+00:00",
        "lat": 59.87671000000000276486389338970184326171875,
        "lon": 30.220323300000000443787939730100333690643310546875
    },
    "last_point": {
        "ts": "2026-08-30T12:12:41+00:00",
        "lat": 59.87671329999999869642124394886195659637451171875,
        "lon": 30.2203133000000008223651093430817127227783203125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 04:02 UTC 75.0%
  • Duration: 6h 37m
  • Radius: 544 meters
  • Data Points: 66 AIS positions
  • Centroid: 59.8768, 30.2203
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 543.700000000000045474735088646411895751953125,
    "duration_minutes": 397.1000000000000227373675443232059478759765625,
    "points": 66,
    "centroid": {
        "lat": 59.8768432590909043256033328361809253692626953125,
        "lon": 30.2203487878787910858591203577816486358642578125
    },
    "bbox": {
        "min_lat": 59.87669170000000207210177904926240444183349609375,
        "min_lon": 30.219500000000000028421709430404007434844970703125,
        "max_lat": 59.88142330000000157497197506017982959747314453125,
        "max_lon": 30.22370000000000089812601800076663494110107421875
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 04:02 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 37m
  • Data Points: 66 AIS positions
  • Period: 2026-08-30T04:42:17+00:00 to 2026-08-30T11:19:20+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 397.1000000000000227373675443232059478759765625,
    "points_in_zone": 66,
    "first_point": {
        "ts": "2026-08-30T04:42:17+00:00",
        "lat": 59.88142330000000157497197506017982959747314453125,
        "lon": 30.22370000000000089812601800076663494110107421875
    },
    "last_point": {
        "ts": "2026-08-30T11:19:20+00:00",
        "lat": 59.8766983000000010406438377685844898223876953125,
        "lon": 30.220314999999999372448655776679515838623046875
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 03:04 UTC 75.0%
  • Duration: 6h 34m
  • Radius: 658 meters
  • Data Points: 67 AIS positions
  • Centroid: 59.8778, 30.2210
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 657.6000000000000227373675443232059478759765625,
    "duration_minutes": 394.6000000000000227373675443232059478759765625,
    "points": 67,
    "centroid": {
        "lat": 59.87783425671643300347568583674728870391845703125,
        "lon": 30.220955200000002349725036765448749065399169921875
    },
    "bbox": {
        "min_lat": 59.8766949999999980036591296084225177764892578125,
        "min_lon": 30.219500000000000028421709430404007434844970703125,
        "max_lat": 59.88345670000000353638824890367686748504638671875,
        "max_lon": 30.2245300000000014506440493278205394744873046875
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 03:04 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 34m
  • Data Points: 67 AIS positions
  • Period: 2026-08-30T03:52:41+00:00 to 2026-08-30T10:27:20+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 394.6000000000000227373675443232059478759765625,
    "points_in_zone": 67,
    "first_point": {
        "ts": "2026-08-30T03:52:41+00:00",
        "lat": 59.88345670000000353638824890367686748504638671875,
        "lon": 30.2245300000000014506440493278205394744873046875
    },
    "last_point": {
        "ts": "2026-08-30T10:27:20+00:00",
        "lat": 59.8766983000000010406438377685844898223876953125,
        "lon": 30.220310000000001338094079983420670032501220703125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 02:02 UTC 75.0%
  • Duration: 6h 38m
  • Radius: 530 meters
  • Data Points: 72 AIS positions
  • Centroid: 59.8790, 30.2217
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 530,
    "duration_minutes": 398,
    "points": 72,
    "centroid": {
        "lat": 59.87897560416669051619464880786836147308349609375,
        "lon": 30.2216685166666678696856251917779445648193359375
    },
    "bbox": {
        "min_lat": 59.876696699999996553742676042020320892333984375,
        "min_lon": 30.219500000000000028421709430404007434844970703125,
        "max_lat": 59.883499999999997953636921010911464691162109375,
        "max_lon": 30.224593299999998663452061009593307971954345703125
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 02:02 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 38m
  • Data Points: 72 AIS positions
  • Period: 2026-08-30T02:51:00+00:00 to 2026-08-30T09:28:59+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 398,
    "points_in_zone": 72,
    "first_point": {
        "ts": "2026-08-30T02:51:00+00:00",
        "lat": 59.88345170000000194931999430991709232330322265625,
        "lon": 30.224509999999998655084709753282368183135986328125
    },
    "last_point": {
        "ts": "2026-08-30T09:28:59+00:00",
        "lat": 59.876696699999996553742676042020320892333984375,
        "lon": 30.220330000000000580939740757457911968231201171875
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 01:06 UTC 75.0%
  • Duration: 6h 33m
  • Radius: 405 meters
  • Data Points: 71 AIS positions
  • Centroid: 59.8801, 30.2223
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 404.5,
    "duration_minutes": 393.69999999999998863131622783839702606201171875,
    "points": 71,
    "centroid": {
        "lat": 59.88005110563380384292031521908938884735107421875,
        "lon": 30.222336504225335573892152751795947551727294921875
    },
    "bbox": {
        "min_lat": 59.876703300000002627712092362344264984130859375,
        "min_lon": 30.219500000000000028421709430404007434844970703125,
        "max_lat": 59.883499999999997953636921010911464691162109375,
        "max_lon": 30.224593299999998663452061009593307971954345703125
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 01:06 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 33m
  • Data Points: 71 AIS positions
  • Period: 2026-08-30T01:51:00+00:00 to 2026-08-30T08:24:40+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 393.69999999999998863131622783839702606201171875,
    "points_in_zone": 71,
    "first_point": {
        "ts": "2026-08-30T01:51:00+00:00",
        "lat": 59.883471700000001192165655083954334259033203125,
        "lon": 30.224524999999999863575794734060764312744140625
    },
    "last_point": {
        "ts": "2026-08-30T08:24:40+00:00",
        "lat": 59.87671329999999869642124394886195659637451171875,
        "lon": 30.220316700000001475245881010778248310089111328125
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 30, 2026 00:00 UTC 75.0%
  • Duration: 6h 37m
  • Radius: 523 meters
  • Data Points: 74 AIS positions
  • Centroid: 59.8812, 30.2231
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 522.799999999999954525264911353588104248046875,
    "duration_minutes": 397.80000000000001136868377216160297393798828125,
    "points": 74,
    "centroid": {
        "lat": 59.88118781621621877775396569631993770599365234375,
        "lon": 30.22305428108106895024320692755281925201416015625
    },
    "bbox": {
        "min_lat": 59.876703300000002627712092362344264984130859375,
        "min_lon": 30.219500000000000028421709430404007434844970703125,
        "max_lat": 59.883551699999998163548298180103302001953125,
        "max_lon": 30.224913300000000759837348596192896366119384765625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 30, 2026 00:00 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 37m
  • Data Points: 74 AIS positions
  • Period: 2026-08-30T00:50:11+00:00 to 2026-08-30T07:28:00+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 397.80000000000001136868377216160297393798828125,
    "points_in_zone": 74,
    "first_point": {
        "ts": "2026-08-30T00:50:11+00:00",
        "lat": 59.8834700000000026420821086503565311431884765625,
        "lon": 30.22450669999999917081368039362132549285888671875
    },
    "last_point": {
        "ts": "2026-08-30T07:28:00+00:00",
        "lat": 59.876703300000002627712092362344264984130859375,
        "lon": 30.220323300000000443787939730100333690643310546875
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 29, 2026 23:11 UTC 75.0%
  • Duration: 6h 31m
  • Radius: 646 meters
  • Data Points: 77 AIS positions
  • Centroid: 59.8822, 30.2237
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 645.5,
    "duration_minutes": 391.6000000000000227373675443232059478759765625,
    "points": 77,
    "centroid": {
        "lat": 59.8822383974026024588965810835361480712890625,
        "lon": 30.22371567142855752763352938927710056304931640625
    },
    "bbox": {
        "min_lat": 59.876703300000002627712092362344264984130859375,
        "min_lon": 30.219500000000000028421709430404007434844970703125,
        "max_lat": 59.883551699999998163548298180103302001953125,
        "max_lon": 30.224913300000000759837348596192896366119384765625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 29, 2026 23:11 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 31m
  • Data Points: 77 AIS positions
  • Period: 2026-08-29T23:51:41+00:00 to 2026-08-30T06:23:20+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 391.6000000000000227373675443232059478759765625,
    "points_in_zone": 77,
    "first_point": {
        "ts": "2026-08-29T23:51:41+00:00",
        "lat": 59.88344829999999774372554384171962738037109375,
        "lon": 30.22451829999999972642399370670318603515625
    },
    "last_point": {
        "ts": "2026-08-30T06:23:20+00:00",
        "lat": 59.87671000000000276486389338970184326171875,
        "lon": 30.2203200000000009595169103704392910003662109375
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 29, 2026 22:00 UTC 75.0%
  • Duration: 6h 37m
  • Radius: 723 meters
  • Data Points: 84 AIS positions
  • Centroid: 59.8829, 30.2241
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 722.5,
    "duration_minutes": 397,
    "points": 84,
    "centroid": {
        "lat": 59.88290293571429856456234119832515716552734375,
        "lon": 30.224131605952379686641506850719451904296875
    },
    "bbox": {
        "min_lat": 59.8767066999999997278791852295398712158203125,
        "min_lon": 30.219500000000000028421709430404007434844970703125,
        "max_lat": 59.883551699999998163548298180103302001953125,
        "max_lon": 30.224913300000000759837348596192896366119384765625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 29, 2026 22:00 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 37m
  • Data Points: 84 AIS positions
  • Period: 2026-08-29T22:50:20+00:00 to 2026-08-30T05:27:21+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 397,
    "points_in_zone": 84,
    "first_point": {
        "ts": "2026-08-29T22:50:20+00:00",
        "lat": 59.8834532999999993307937984354794025421142578125,
        "lon": 30.2245233000000013134922483004629611968994140625
    },
    "last_point": {
        "ts": "2026-08-30T05:27:21+00:00",
        "lat": 59.8767066999999997278791852295398712158203125,
        "lon": 30.220323300000000443787939730100333690643310546875
    }
}

Methodology: 2026.01.18

Sts🛰️? Ust-Luga/St. Petersburg Approach Aug 29, 2026 21:40 UTC 75/100
Vessel A: IMO 8230728 (VOLGONEFT 128) RUSSIA
Vessel B: Thoth (THOTH) Russia
  • Minimum Distance: 219 meters
  • Average Distance: 222 meters
  • Duration: 1h 5m
  • Period: 2026-08-29T21:40:58+00:00 to 2026-08-29T22:46:12+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 75/100

Moderate-confidence STS candidate. Two tankers (VOLGONEFT 128 and THOTH) maintained close proximity (min 218m, avg 222m) for 65 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 Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 218m, avg 222m
Duration15/25Duration 65 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Ust-Luga/St. Petersburg Approach

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1C_IW_GRDH_1SDV_20260829T153916_20260829T153941_009212_0124DD_1FCD_COG • Acquired: 2026-08-29T15:39:16.746796Z • Platform: sentinel-1c

Searched: 2026-08-30T04:00:01.703322+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273437610,
        "imo": 8230728,
        "name": "VOLGONEFT 128",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273253080,
        "imo": 9164718,
        "name": "THOTH",
        "flag": "Russia"
    },
    "min_distance_m": 218.5,
    "avg_distance_m": 221.80000000000001136868377216160297393798828125,
    "distance_consistency_m": 2.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 65.2000000000000028421709430404007434844970703125,
    "overlap_duration_s": 3914,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-29T21:40:58+00:00",
        "end": "2026-08-29T22:46:12+00:00"
    },
    "points_count": {
        "vessel_a": 3,
        "vessel_b": 3
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 75,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 218m, avg 222m"
            },
            "duration": {
                "score": 15,
                "max": 25,
                "detail": "Duration 65 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: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "Moderate-confidence STS candidate. Two tankers (VOLGONEFT 128 and THOTH) maintained close proximity (min 218m, avg 222m) for 65 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 Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.88266840000000001964508555829524993896484375,
            "lon": 30.22572389999999842302713659591972827911376953125
        },
        "time_window": {
            "start_ts": "2026-08-29T21:40:58+00:00",
            "end_ts": "2026-08-29T22:46:12+00:00"
        },
        "searched_at": "2026-08-30T04:00:01.703322+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260829T153916_20260829T153941_009212_0124DD_1FCD_COG",
        "scene_datetime": "2026-08-29T15:39:16.746796Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 27.491172999999999859710442251525819301605224609375,
            "min_lat": 58.31375899999999745659806649200618267059326171875,
            "max_lon": 32.63072199999999867259248276241123676300048828125,
            "max_lat": 60.23731599999999986039256327785551548004150390625
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1165666_thumbnail_20260830040006.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1165666_thumbnail_20260830040006.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 29, 2026 21:02 UTC 75.0%
  • Duration: 6h 34m
  • Radius: 74 meters
  • Data Points: 89 AIS positions
  • Centroid: 59.8834, 30.2245
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 74.099999999999994315658113919198513031005859375,
    "duration_minutes": 394.30000000000001136868377216160297393798828125,
    "points": 89,
    "centroid": {
        "lat": 59.88344998202249058749657706357538700103759765625,
        "lon": 30.22452035505617828903268673457205295562744140625
    },
    "bbox": {
        "min_lat": 59.88281500000000079353412729687988758087158203125,
        "min_lon": 30.2244783000000012407326721586287021636962890625,
        "max_lat": 59.883551699999998163548298180103302001953125,
        "max_lon": 30.224913300000000759837348596192896366119384765625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 29, 2026 21:02 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 34m
  • Data Points: 89 AIS positions
  • Period: 2026-08-29T21:54:41+00:00 to 2026-08-30T04:29:01+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 394.30000000000001136868377216160297393798828125,
    "points_in_zone": 89,
    "first_point": {
        "ts": "2026-08-29T21:54:41+00:00",
        "lat": 59.88344829999999774372554384171962738037109375,
        "lon": 30.224503299999998517932908725924789905548095703125
    },
    "last_point": {
        "ts": "2026-08-30T04:29:01+00:00",
        "lat": 59.88344829999999774372554384171962738037109375,
        "lon": 30.224501700000001136459104600362479686737060546875
    }
}

Methodology: 2026.01.18

Sts🛰️? Ust-Luga/St. Petersburg Approach Aug 29, 2026 20:21 UTC 85/100
Vessel A: IMO 8230728 (VOLGONEFT 128) RUSSIA
Vessel B: Thoth (THOTH) Russia
  • Minimum Distance: 217 meters
  • Average Distance: 220 meters
  • Duration: 2h 24m
  • Period: 2026-08-29T20:21:32+00:00 to 2026-08-29T22:46:12+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (VOLGONEFT 128 and THOTH) maintained close proximity (min 217m, avg 220m) for 145 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 Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 217m, avg 220m
Duration25/25Duration 145 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Ust-Luga/St. Petersburg Approach

🛰️ Satellite Corroboration

? SAR Inconclusive

Satellite imagery available but requires review

Preview available for manual review

Scene: S1C_IW_GRDH_1SDV_20260829T153916_20260829T153941_009212_0124DD_1FCD_COG • Acquired: 2026-08-29T15:39:16.746796Z • Platform: sentinel-1c

Searched: 2026-08-30T02:45:07.371142+00:00

Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273437610,
        "imo": 8230728,
        "name": "VOLGONEFT 128",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273253080,
        "imo": 9164718,
        "name": "THOTH",
        "flag": "Russia"
    },
    "min_distance_m": 216.69999999999998863131622783839702606201171875,
    "avg_distance_m": 219.599999999999994315658113919198513031005859375,
    "distance_consistency_m": 3,
    "duration_minutes": 144.69999999999998863131622783839702606201171875,
    "overlap_duration_s": 8680,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-29T20:21:32+00:00",
        "end": "2026-08-29T22:46:12+00:00"
    },
    "points_count": {
        "vessel_a": 6,
        "vessel_b": 6
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 217m, avg 220m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 145 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: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VOLGONEFT 128 and THOTH) maintained close proximity (min 217m, avg 220m) for 145 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 Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    },
    "sar": {
        "status": "inconclusive",
        "centroid": {
            "lat": 59.88266939999999749488779343664646148681640625,
            "lon": 30.225693199999998483917806879617273807525634765625
        },
        "time_window": {
            "start_ts": "2026-08-29T20:21:32+00:00",
            "end_ts": "2026-08-29T22:46:12+00:00"
        },
        "searched_at": "2026-08-30T02:45:07.371142+00:00",
        "scene_id": "S1C_IW_GRDH_1SDV_20260829T153916_20260829T153941_009212_0124DD_1FCD_COG",
        "scene_datetime": "2026-08-29T15:39:16.746796Z",
        "platform": "sentinel-1c",
        "bbox": {
            "min_lon": 27.491172999999999859710442251525819301605224609375,
            "min_lat": 58.31375899999999745659806649200618267059326171875,
            "max_lon": 32.63072199999999867259248276241123676300048828125,
            "max_lat": 60.23731599999999986039256327785551548004150390625
        },
        "assets": {
            "preview_url": "https:\/\/fleetleaks.com\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1165424_thumbnail_20260830024512.png",
            "stored_path": "\/home\/fleetleaks\/public_html\/wp-content\/uploads\/fleetleaks-evidence\/sar-imagery\/2026\/08\/event_1165424_thumbnail_20260830024512.png",
            "source": "copernicus_dataspace"
        },
        "notes": "Preview available for manual review"
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 29, 2026 20:06 UTC 75.0%
  • Duration: 6h 28m
  • Radius: 74 meters
  • Data Points: 89 AIS positions
  • Centroid: 59.8834, 30.2245
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 74.099999999999994315658113919198513031005859375,
    "duration_minutes": 388.5,
    "points": 89,
    "centroid": {
        "lat": 59.88344985056182423477366683073341846466064453125,
        "lon": 30.224518202247185882924895850010216236114501953125
    },
    "bbox": {
        "min_lat": 59.88281500000000079353412729687988758087158203125,
        "min_lon": 30.2244783000000012407326721586287021636962890625,
        "max_lat": 59.883551699999998163548298180103302001953125,
        "max_lon": 30.224913300000000759837348596192896366119384765625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach Aug 29, 2026 20:06 UTC 80.0%
  • Zone: Ust-Luga/St. Petersburg Approach
  • Duration: 6h 28m
  • Data Points: 89 AIS positions
  • Period: 2026-08-29T20:55:31+00:00 to 2026-08-30T03:24:00+00:00
Show Raw Evidence JSON
{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 388.5,
    "points_in_zone": 89,
    "first_point": {
        "ts": "2026-08-29T20:55:31+00:00",
        "lat": 59.88344500000000181216819328255951404571533203125,
        "lon": 30.22450500000000062073013396002352237701416015625
    },
    "last_point": {
        "ts": "2026-08-30T03:24:00+00:00",
        "lat": 59.8834650000000010550138540565967559814453125,
        "lon": 30.2245300000000014506440493278205394744873046875
    }
}

Methodology: 2026.01.18

Sts Ust-Luga/St. Petersburg Approach Aug 29, 2026 19:22 UTC 85/100
Vessel A: IMO 8230728 (VOLGONEFT 128) RUSSIA
Vessel B: Thoth (THOTH) Russia
  • Minimum Distance: 217 meters
  • Average Distance: 219 meters
  • Duration: 3h 23m
  • Period: 2026-08-29T19:22:37+00:00 to 2026-08-29T22:46:12+00:00
  • Vessel A Avg Speed: 0.0 knots
  • Vessel B Avg Speed: 0.0 knots
  • Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 85/100

High-confidence STS candidate. Two tankers (VOLGONEFT 128 and THOTH) maintained close proximity (min 217m, avg 219m) for 204 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga/St. Petersburg Approach, a known STS activity area.

View scoring breakdown
FactorScoreDetail
Distance Tightness15/25Min distance 217m, avg 219m
Duration25/25Duration 204 minutes
Speed Stability20/20both nearly stationary; very stable speeds
Distance Consistency15/15Distance variance ±3m
Isolation5/10Isolation data not available
Context5/5In monitored zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "vessel_a": {
        "mmsi": 273437610,
        "imo": 8230728,
        "name": "VOLGONEFT 128",
        "flag": "RUSSIA"
    },
    "vessel_b": {
        "mmsi": 273253080,
        "imo": 9164718,
        "name": "THOTH",
        "flag": "Russia"
    },
    "min_distance_m": 216.69999999999998863131622783839702606201171875,
    "avg_distance_m": 218.900000000000005684341886080801486968994140625,
    "distance_consistency_m": 2.79999999999999982236431605997495353221893310546875,
    "duration_minutes": 203.599999999999994315658113919198513031005859375,
    "overlap_duration_s": 12215,
    "speed_a_avg": 0,
    "speed_a_std": 0,
    "speed_b_avg": 0,
    "speed_b_std": 0,
    "speed_summary": {
        "vessel_a": {
            "avg_sog": 0,
            "max_sog": 0
        },
        "vessel_b": {
            "avg_sog": 0,
            "max_sog": 0
        }
    },
    "time_window": {
        "start": "2026-08-29T19:22:37+00:00",
        "end": "2026-08-29T22:46:12+00:00"
    },
    "points_count": {
        "vessel_a": 8,
        "vessel_b": 8
    },
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "score": {
        "value": 85,
        "components": {
            "distance_tightness": {
                "score": 15,
                "max": 25,
                "detail": "Min distance 217m, avg 219m"
            },
            "duration": {
                "score": 25,
                "max": 25,
                "detail": "Duration 204 minutes"
            },
            "speed_stability": {
                "score": 20,
                "max": 20,
                "detail": "both nearly stationary; very stable speeds"
            },
            "distance_consistency": {
                "score": 15,
                "max": 15,
                "detail": "Distance variance \u00b13m"
            },
            "isolation": {
                "score": 5,
                "max": 10,
                "detail": "Isolation data not available"
            },
            "context": {
                "score": 5,
                "max": 5,
                "detail": "In monitored zone: Ust-Luga\/St. Petersburg Approach"
            }
        },
        "summary": "High-confidence STS candidate. Two tankers (VOLGONEFT 128 and THOTH) maintained close proximity (min 217m, avg 219m) for 204 minutes. Both vessels were slow-moving (avg speeds 0.0 and 0.0 knots). The stable separation distance suggests deliberate parallel positioning typical of cargo transfer. Event occurred in Ust-Luga\/St. Petersburg Approach, a known STS activity area."
    }
}

Methodology: 2026.01.18

Loiter Ust-Luga/St. Petersburg Approach Aug 29, 2026 19:00 UTC 75.0%
  • Duration: 6h 34m
  • Radius: 74 meters
  • Data Points: 94 AIS positions
  • Centroid: 59.8835, 30.2245
  • Zone: Ust-Luga/St. Petersburg Approach
Show Raw Evidence JSON
{
    "radius_m": 74.2000000000000028421709430404007434844970703125,
    "duration_minutes": 394.5,
    "points": 94,
    "centroid": {
        "lat": 59.883450549999992063021636568009853363037109375,
        "lon": 30.22451749893620132070282124914228916168212890625
    },
    "bbox": {
        "min_lat": 59.88281500000000079353412729687988758087158203125,
        "min_lon": 30.224483299999999275087247951887547969818115234375,
        "max_lat": 59.883551699999998163548298180103302001953125,
        "max_lon": 30.224913300000000759837348596192896366119384765625
    },
    "zone_id": "russia_ust_luga_approach"
}

Methodology: 2026.01.18

Sanctioned on the same day

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  • Aleksey Savrasov · IMO 9645061 🇪🇺 EU
  • ALTURA · IMO 9292199 🇪🇺 EU🇬🇧 UK
  • Anabar · IMO 9194012 🇨🇦 CA
  • Apate · IMO 9433016 🇪🇺 EU🇬🇧 UK
  • Armada Leader · IMO 9260483 🇪🇺 EU
  • Aura 1 · IMO 9472634 🇪🇺 EU🇬🇧 UK
  • Bergen T · IMO 8918540 🇪🇺 EU