#upper_deck__upperdeck  a higher deck
  supertype:  #deck  any of various floor-like platforms built into a vessel
  part:  #deck-house
  subtype:  #boat_deck  the upper deck on which lifeboats are stored
  subtype:  #bridge_deck__bridge  an upper deck where a ship is steered and the captain stands
     subtype:  #conning_tower__conningtower  a raised bridge on a submarine; often used for entering and exiting
     subtype:  #flying_bridge__flybridge__fly_bridge__flybridge__moneky_bridge  the highest navigational bridge on a ship; a small (often open) deck above the pilot house
  subtype:  #freeboard_deck__freeboarddeck  the uppermost watertight deck
  subtype:  #weather_deck__weatherdeck__shelter_deck__shelterdeck  upper deck having no overhead protection from the weather, but sheltering the deck below
     subtype:  #poop_deck  an exposed partial weather deck on the stern superstructure of a ship
     subtype:  #topside  (usually plural) weather deck; the part of a ship's hull that is above the waterline

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