#navy__naval_forces  an organization of military naval forces
  supertype:  #armed_service__armedservice__military_service__service  a force that is a branch of the armed forces
  subtype:  #United_States_Navy  the navy of the United States of America
  member:  #naval_unit__navalunit  a military unit that is part of a navy
  member:  #fleet  a group of warships organized as a tactical unit
     member:  #guided_missile_frigate  a frigate that carries guided missiles
     member:  #warship__war_vessel__warvessel__combat_ship  a government ship that is available for waging war

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