#masthead  the head or top of a mast
  supertype:  top  the upper part of anything; "the mower cuts off the tops of the grass"; "the title should be written at the top of the first page"
  part of:  mast  a vertical spar for supporting sails
     part of:  sailing_vessel__sailingvessel__sailing_ship__sailingship  a vessel that is powered by the wind; often having several masts

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