Ships transferred to the NDRF may be retained in Navy Mobilization Plans and maintained by MARAD under priorities set by the Department of the Navy. If the Navy decides it no longer needs the ship, the Secretary of the Navy strikes the ship from the Naval Vessel Register and transfers the title to MARAD. When possible, MARAD gets first disposition rights, which allows it to convert merchant ships to the Ready Reserve Force (RRF) or to sell the ship for scrapping in connection with the Merchant Marine Act of 1936, Sec. 508, and use the proceeds to buy more supply ships.