#mariner__seaman__tar__jacktar__oldsalt__gob__sea_dog__seadog  a man who serves as a sailor
  supertype:  sailor__crewman  any member of a ship's crew
  subtype:  able_seaman__able-bodied_seaman  a seaman in the merchant navy; trained in special skills
  subtype:  boatswain__bos'n__bo's'n__bosun__bo'sun  a petty officer on a merchant ship who controls the work of other seamen
  subtype:  deckhand__roustabout  a member of a ship's crew who performs manual labor
  subtype:  helmsman__steersman__steerer  the person who steers a ship
     subtype:  coxswain__cox  the helmsman of a ship's boat or a racing crew
  subtype:  lighterman__bargeman__bargee  someone who operates a barge
  subtype:  ship's_officer__officer  a person authorized to serve in a position of authority on a vessel; "he is the officer in charge of the ship's engines"
     subtype:  sea_captain__seacaptain__master__captain  an officer who is licensed to command a merchant ship
        instance:  William_Kidd__Kidd__Captain_Kidd
     subtype:  first_mate__firstmate__mate  the officer below the master on a commercial ship
     subtype:  privateersman__privateer  an officer or crew member of a privateer
        instance:  Sir_John_Hawkins__Hawkins__Hawkyns__Sir_John_Hawkyns
     subtype:  purser  an officer aboard a ship who keeps accounts and attends to the passengers' welfare
     subtype:  sailing_master__sailingmaster__navigator  the ship's officer in charge of navigation
     subtype:  steward.ship's_officer  the ship's officer who is in charge of provisions and dining arrangements
     subtype:  supercargo  an officer on a merchant ship in charge of the cargo and its sale and purchase
  subtype:  pilot  a person qualified to guide ships through difficult waters going into or out of a harbor
  subtype:  sea_lawyer__sealawyer  an argumentative and contentious seaman
  subtype:  whaler  a seaman who works on a ship that hunts whales

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