#fleet  a group of warships organized as a tactical unit
  subtype:  #flotilla  #flotilla.fleet  #armada  #battle_fleet  #wolf_pack.fleet
  member:  #guided_missile_frigate  #warship
  member of:  #navy
  supertype:  #aggregation__collection__accumulation__assemblage  several things grouped together
     supertype:  #group__grouping  any number of entities (members) considered as a unit
        supertype:  pm#collection  something gathering separated things (entities/situations)
           supertype:  pm#divisible_entity__divisibleentity  many classifications under this category are application-dependant
              supertype:  pm#entity  something that can be "involved" in a situation
                 supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
              supertype:  pm#divisible_thing__divisiblething
                 supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

No statement uses or specializes #fleet; click here to add one.