#mast  a vertical spar for supporting sails
  supertype:  spar  a stout rounded pole of wood or metal used to support rigging
  subtype:  foremast  jiggermast  jury_mast  mainmast  mizzenmast  topmast
  part:  masthead
  part of:  sailing_vessel__sailingvessel__sailing_ship__sailingship  a vessel that is powered by the wind; often having several masts

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