strongback

  1. Noun.  (nautical) The fore-and-aft spar extending from stem to stern on a lifeboat and serving as a raised spreader for a boat cover. (FM 55-501).
  2. Noun.  (nautical) A strong bar placed across a hatch opening to hold hatch boards or hatch covers. (FM 55-501).

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This entry was last updated on RefTopia from its source on 3/20/2012.