Central Galactic Navy

The Central Galactic Navy is the maritime and space warfare service branch of the Central Galactic Defense Forces. It has responsibility over deep space, maritime, riverine, coastal, and shore operations. It is considered the most strategically important branch in the Defense Forces due to Space Command providing interstellar power projection, outer- and deep-space defense, and space logistics and mobility. 
The Terran space warfare establishment evolved out of naval aviation in the late 21st and early 22nd centuries, gradually overturning a century of Air Arm traditions and replacing it with Naval traditions and jargon. The CGN is professionally headed by the Chief of Naval Operations (CNO), who is assisted by the Vice Chief of Naval Operations, the Master Chief Petty Officer of the Navy, and the naval headquarters staff, which by custom is composed of an even mix of space and sea personnel.
The Navy also performs its traditional role of oceanic warfare. It provides maritime combat capability, primarily in defensive and peacekeeping operations within the Republic, though it can provide fleet forces for expeditionary operations, and provides special warfare personnel for combatant commanders and joint special operations. The Navy provides the CGDF with sea control, maritime security, sealift, and control of waterways.