#yardarm  either end of the yard of a square-rigged ship
  supertype:  #end  either extremity of something that has length: "the end of the pier"; "she knotted the end of the thread"; "they rode to the end of the line"
  part of:  #yard.spar  a long horizontal spar tapered at the end and used to support and spread a square sail or lateen
     part of:  #sailing_vessel__sailingvessel__sailing_ship__sailingship  a vessel that is powered by the wind; often having several masts

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