Vessels / IMO 9304590
OPTIMAL ACE
IMO 9304590 · Vessel observations and history
Recorded observations associated with this IMO number. AIS identifiers are self-reported and can contain errors. Events describe observations, not proof of unlawful activity.
Latest available information
- IMO
- 9304590
- Latest matched MMSI
- 477215800
- List name
- OPTIMAL ACE
- Listed flag
- Hong Kong SAR China
- Reported destination
- GIGIB
- Latest AIS observation
- 2026-09-05 21:16:10 UTC
- Observed coordinates
- 35.9936, -4.9804
The observation time indicates when the position was received. It does not establish the vessel's current location. The listed flag comes from the watch list record.
Recent recorded track
Available positions from the past 48 hours for the latest matched MMSI. Reception gaps remain gaps. Earlier tracks may be preserved with individual events below.
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Watch list references
This IMO is included in the tracker's current watch list. List inclusion alone does not establish current legal status or confirm shadow fleet activity. Check the linked records for scope and updates.
References describe the latest stored list record. Read the methodology and limitations.
Recorded events
Latest 5 recorded events, up to 50. All times are UTC. Open an event for its measurements and available archived tracks.
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Vessel encounter
The tracker observed two vessels staying close together for a sustained interval in relatively quiet surroundings.
First observation: 2026-09-05 18:12:18 UTC · Last close observation: 2026-09-05 20:02:18 UTC · Observed duration: 110 min
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Reported draught change
The draught entered in the AIS report changed. This can be consistent with a cargo operation, but AIS draught is manually reported and is not a direct measurement.
Previous reported draught: 9.8 m · New reported draught: 8.2 m · Reported draught difference: -1.6 m
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Vessel encounter
The tracker observed two vessels staying close together for a sustained interval in relatively quiet surroundings.
First observation: 2026-09-05 16:34:22 UTC · Last close observation: 2026-09-05 17:10:22 UTC · Observed duration: 36 min
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Vessel encounter
The tracker observed two vessels staying close together for a sustained interval in relatively quiet surroundings.
Observed duration: 62 min · Closest observed separation: 49 m · Both vessels slow: 0 min
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Vessel encounter
The tracker observed two vessels staying close together for a sustained interval in relatively quiet surroundings.
Observed duration: 241 min · Closest observed separation: 42 m · Both vessels slow: 0 min
Recorded identity changes
Latest 0 detected changes, up to 50. This is a record of changes seen by the tracker, not a complete registry history. The IMO page stays the same when a name or MMSI changes.
No identity changes have been recorded by the tracker.