长白山
In October 1949, the ROK Navy purchased a 600-ton submarine chaser, the former on the American civil market with funds raised among its personnel. She was renamed as ROKS "Baekdusan" (PC 701) after Paektu Mountain, and became "the first significant warship of the newly independent nation" (Later on the first night of the Korean War, she sank a 1,000-ton North Korean freighter loaded with 600 troops toward the vital South Korean port of Busan.). The Navy purchased three additional "PC-461"-class submarine chasers before the Korean War.