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IMO 8859639

Vessel information

Vessel Name VALAAMS

IMO Number 8859639

MMSI 273454000

Vessel Type Tanker

Flag 🇷🇺 RUSSIA

Call Sign UADO

Length 133 m

Beam 17 m

Detected Events (40)

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 30, 2026 11:15 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 5h 45m
Data Points: 3 AIS positions
Period: 2026-08-30T11:15:56+00:00 to 2026-08-30T17:00:56+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 345,
    "points_in_zone": 3,
    "first_point": {
        "ts": "2026-08-30T11:15:56+00:00",
        "lat": 59.8844950000000011414158507250249385833740234375,
        "lon": 30.212528299999998893099473207257688045501708984375
    },
    "last_point": {
        "ts": "2026-08-30T17:00:56+00:00",
        "lat": 59.8845333000000010770236258395016193389892578125,
        "lon": 30.212585000000000690079104970209300518035888671875
    }
}

Methodology: 2026.01.18

Zone Dwell Ust-Luga/St. Petersburg Approach

Aug 30, 2026 10:21 UTC 80.0% ▼

Zone: Ust-Luga/St. Petersburg Approach
Duration: 6h 15m
Data Points: 4 AIS positions
Period: 2026-08-30T10:45:55+00:00 to 2026-08-30T17:00:56+00:00

Show Raw Evidence JSON

{
    "zone_id": "russia_ust_luga_approach",
    "zone_name": "Ust-Luga\/St. Petersburg Approach",
    "dwell_minutes": 375,
    "points_in_zone": 4,
    "first_point": {
        "ts": "2026-08-30T10:45:55+00:00",
        "lat": 59.88448170000000203572199097834527492523193359375,
        "lon": 30.212469999999999714646037318743765354156494140625
    },
    "last_point": {
        "ts": "2026-08-30T17:00:56+00:00",
        "lat": 59.8845333000000010770236258395016193389892578125,
        "lon": 30.212585000000000690079104970209300518035888671875
    }
}

Methodology: 2026.01.18

Sts🛰️? Ust-Luga/St. Petersburg Approach

Aug 30, 2026 10:12 UTC 72/100 ▼

Vessel A: MMSI 273353550 (EUROSTAR 4 MARIA) RUSSIA

Vessel B: IMO 8859639 (VALAAMS) RUSSIA

Minimum Distance: 99 meters
Average Distance: 100 meters
Duration: 38 minutes
Period: 2026-08-30T10:12:55+00:00 to 2026-08-30T10:51:14+00:00
Vessel A Avg Speed: 0.3 knots
Vessel B Avg Speed: 0.0 knots
Zone: Ust-Luga/St. Petersburg Approach

Confidence Analysis

Score: 72/100

Moderate-confidence STS candidate. Two tankers (EUROSTAR 4 MARIA and VALAAMS) maintained close proximity (min 99m, avg 100m) for 38 minutes. Both vessels were slow-moving (avg speeds 0.3 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

Factor	Score	Detail
Distance Tightness	25/25	Min distance 99m, avg 100m
Duration	5/25	Duration 38 minutes
Speed Stability	17/20	both nearly stationary; stable speeds
Distance Consistency	15/15	Distance variance ±1m
Isolation	5/10	Isolation data not available
Context	5/5	In 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

Click image to view full size

Factor	Score	Detail
Distance Tightness	25/25	Min distance 98m, avg 102m
Duration	25/25	Duration 219 minutes
Speed Stability	20/20	both nearly stationary; very stable speeds
Distance Consistency	15/15	Distance variance ±6m
Isolation	5/10	Isolation data not available
Context	5/5	In monitored zone: Ust-Luga/St. Petersburg Approach

Time (UTC)	Lat	Lon	Speed	Course	Zone
Aug 30 17:00	59.8845	30.2126	0.0 kn	53.7°	Ust-Luga/St. Petersburg Approach
Aug 30 16:03	59.8845	30.2126	0.0 kn	251.2°	Ust-Luga/St. Petersburg Approach
Aug 30 11:15	59.8845	30.2125	0.0 kn	59.9°	Ust-Luga/St. Petersburg Approach
Aug 30 10:45	59.8845	30.2125	0.0 kn	253.4°	Ust-Luga/St. Petersburg Approach
Aug 30 10:21	59.8845	30.2125	0.0 kn	102.1°	Ust-Luga/St. Petersburg Approach
Aug 30 08:33	59.8845	30.2124	0.0 kn	133.9°	Ust-Luga/St. Petersburg Approach
Aug 30 07:06	59.8844	30.2125	0.0 kn	332.6°	Ust-Luga/St. Petersburg Approach
Aug 30 06:51	59.8845	30.2124	0.0 kn	134.5°	Ust-Luga/St. Petersburg Approach
Aug 29 22:33	59.8846	30.2122	0.0 kn	279.6°	Ust-Luga/St. Petersburg Approach
Aug 29 09:42	59.8845	30.2125	0.1 kn	229.7°	Ust-Luga/St. Petersburg Approach
Aug 29 07:00	59.8845	30.2124	0.0 kn	263.4°	Ust-Luga/St. Petersburg Approach
Aug 29 04:09	59.8845	30.2125	0.0 kn	148.3°	Ust-Luga/St. Petersburg Approach
Aug 28 23:57	59.8845	30.2125	0.0 kn	305.2°	Ust-Luga/St. Petersburg Approach
Aug 28 20:39	59.8845	30.2124	0.0 kn	56.1°	Ust-Luga/St. Petersburg Approach
Aug 28 20:33	59.8845	30.2125	0.0 kn	247.2°	Ust-Luga/St. Petersburg Approach
Aug 28 16:51	59.8845	30.2125	0.0 kn	65.4°	Ust-Luga/St. Petersburg Approach
Aug 28 11:54	59.8845	30.2125	0.0 kn	138.2°	Ust-Luga/St. Petersburg Approach
Aug 28 11:30	59.8845	30.2126	0.0 kn	46.4°	Ust-Luga/St. Petersburg Approach
Aug 28 04:51	59.8845	30.2126	0.0 kn	235.6°	Ust-Luga/St. Petersburg Approach
Aug 25 08:41	59.8770	30.2196	0.0 kn	332.3°	Ust-Luga/St. Petersburg Approach

VALAAMS

IMO 8859639

Vessel information

Detected Events (40)

Confidence Analysis

🛰️ Satellite Corroboration

Confidence Analysis

🛰️ Satellite Corroboration

Recent Position Data

Data Source

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