Republic of Surea Navy

The Republic of Surea Navy (朝本民國 海軍; Jupon Minggukku Umaikun), or 'ROS Navy (ROSN), is the maritime branch of the Republic of Surea Armed Forces, tasked with the naval defense of Surea. It has a large fleet with significant blue-water operating capabilities. The force is based strictly on defensive armament. Its main tasks are to maintain control of the nation's sea lanes and to patrol territorial waters. It has also stepped up its participation in UN-led peacekeeping operations (PKOs) and Maritime Interdiction Operations (MIOs).

The ROSN also has the world's second largest carrier fleet, with 6 in service and 2 under construction. It is considered the strongest of all Surean Armed Forces branch and served as the first line of defence for the country.

The Navy is administratively managed by the Department of the Navy, which is headed by the civilian Secretary of the Navy. The Department of the Navy is itself a division of the Department of War, which is headed by the Secretary of War. The highest ranking Naval officer is the Chief of Naval Operations.

The ship prefix for ROSN combatants is ROSS (Republic of Surea Ship).