Abaft the beam

What does "Abaft the beam" mean?

Today it means: Behind the centre point (beam) of the boat.

Its the term used when deciding if another vessel is overtaking or not. On a modern sailing boat the beam is roughly where the shrouds are so if another vessel is on a similar course but behind that point they are deemed to be overtaking and must stand clear.

Abaft the beam is 22.5 degrees behind the beam of the vessel. consider this, if the other vessel is in the beam of the stern light (if it were on) then it is abaft the beam.

See also: Abaft  and: IRPCS Rule 13. Overtaking.  and: Abeam

By SailingQuiz November 2019   Category: Sailing Terms              

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