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From Wikipedia, the free encyclopedia

Shipboard bitts
Shipboard bitts
Shoreside bitts
Shoreside bitts

Bitts are paired vertical wooden or metal posts mounted either aboard a ship or on a wharf, pier or quay. The posts are used to secure mooring lines, ropes, hawsers, or cables.[1] Bitts aboard wooden sailing ships (sometime called cable-bitts) were large vertical timbers mortised into the keel and used as the anchor cable attachment point.[2] Bitts are carefully manufactured and maintained to avoid any sharp edges which might chafe and weaken the mooring lines.[3]

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Mooring lines may be laid around the bitts either singly or in a figure-8 pattern with the friction against tension increasing with each successive turn. As a verb bitt means to take another turn increasing the friction to slow or adjust a mooring ship's relative movement.[1]

Mooring fixtures of similar purpose:

  • A bollard is a single vertical post useful to receive a spliced loop at the end of a mooring line.[1]
  • A cleat has horizontal horns.[4]


  1. ^ a b c Knight, Austin M. (1937). Modern Seamanship (Tenth ed.). New York: D. Van Nostrand Company. p. 783.
  2. ^ Keegan, John (1989). The Price of Admiralty. New York: Viking. p. 276. ISBN 0-670-81416-4.
  3. ^ Manning, George Charles (1930). Manual of Naval Architecture. New York: D. Van Nostrand Company. p. 158.
  4. ^ Knight, p.788
This page was last edited on 8 December 2020, at 00:31
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