Navy Ship Units

Vessel, one ship. Commanded by Captain and up

Task Unit, several ships, Commanded by Flotilia Admiral and up

Squadron, several capital ships, Commanded by Same as before

Task Group, 2+ Task Units and Squadrons, Commanded by Rear Admiral

Battle Fleet, 2+ Task Groups, Commanded by Vice Admiral

Fleet, 2 Battle Fleets, Commanded by Admiral

Navy, 2+ Fleets, Fleet Admiral, Admiral of the Fleet.