Naval Chain of Command

Fleet Command (Supreme Commander) 30 sector fleets, 9 admiralty fleets
   Fleet (Fleet Admiral) 5-10 battlegroups
       Battlegroup (Admiral) 3-7 task groups
           Task Force (Vice Admiral) 25 patrols
                Patrol (Commodore/Rear Admiral) 5 lines
                   Line (Commodore) 18 ships
                       Ship (Captain)