#sailboat__sailing_boat__sailingboat  a small sailing vessel; usually with a single mast
  supertype:  #sailing_vessel__sailingvessel__sailing_ship__sailingship  a vessel that is powered by the wind; often having several masts
  part:  #centerboard
  subtype:  #catamaran  a sailboat with two parallel hulls held together by single deck
  subtype:  #catboat  a sailboat with a single mast set far forward
  subtype:  #trimaran  a fast sailboat with 3 parallel hulls

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