#fleet  a group of warships organized as a tactical unit
  supertype:  #aggregation__collection__accumulation__assemblage  several things grouped together
  member:  #guided_missile_frigate  #warship
  member of:  #navy
  subtype:  #flotilla  a fleet of small craft
  subtype:  #flotilla.fleet  a United States Navy fleet consisting of two or more squadrons of small warships
  subtype:  #armada  a large fleet
     instance:  #The_Armada__Spanish_Armada__Invincible_Armada
  subtype:  #battle_fleet  a fleet of warships prepared for battle
  subtype:  #wolf_pack.fleet__wolfpack  a group of submarines operating together in attacking enemy convoys

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