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What is Clear Astern Distance?

Clear Astern Distance The available unobstructed distance behind the vessel, critical for manoeuvring astern.

Source: IMO SMCP, STCW Convention, SOLAS, COLREG

How is “Clear Astern Distance” Used in Practice?

Bridge to lookout: 'Report clear astern distance frequently during astern manoeuvring.'

Certification Exam Relevance

STCWMarlins TestISF WatchkeeperGMDSS

Who Needs to Know This Term?

  • Deck Officers
  • Engine Officers
  • Masters

Related Maritime English Terms

Dead Slow AsternElectronic Range LineHard PortHard Starboard

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Frequently Asked Questions

What is Clear Astern Distance?

The available unobstructed distance behind the vessel, critical for manoeuvring astern.

Where can I learn this term for free?

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