MARINE21

Unknown vessel type · MMSI 477995934 · Last UTC 2026-03-04 09:22 UTC

Average Speed (60D)

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MARINE21

Unknown vessel type

Position time: 2026-03-04 09:22 UTC

Flag: HK

Country: Hong Kong

MMSI: 477995934

Length: 16 m

Width: 5 m

Call sign: MD21

Destination is not available in AIS.

AIS refresh is typically every 4–6 hours, sometimes up to 1–2 days.

Track window: last 56 days

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Nearest known locations from geocache labels around the vessel.

Nearby locations are being calculated.

Modeled destinations using route history and peer traffic context.

Destination candidates are loading.

Inferred port calls from sparse AIS snapshots.

Port call inference is loading.

News links are loading.

How often is this page updated?

AIS updates are usually every 4–6 hours. In low-coverage areas delays up to 1–2 days are possible.

Why are some vessel fields missing?

Some AIS transponders do not transmit complete static metadata.

How accurate are destinations and port calls?

These are probabilistic model outputs and should be treated as signals, not confirmations.