SHIRASE

Icebreaker · IMO 4575015 · MMSI 431999533 · Last UTC 2026-03-13 06:22 UTC

Average Speed (60D)

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SHIRASE

Icebreaker

Position time: 2026-03-13 06:22 UTC

Flag: jpn

Country: Japan

IMO: 4575015

MMSI: 431999533

GT: 14500

Year: 2009

Call sign: JSNJ

Destination is not available in AIS.

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

Track window: last 53 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.

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Inferred port calls from sparse AIS snapshots.

Port call inference is loading.

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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.