#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 of:  sailing_vessel
  part:  masthead  the head or top of a mast

No statement uses or specializes mast; click here to add one.