USS Sausalito, a 1430-ton Tacoma class frigate built at Richmond, California, was commissioned in March 1944 with a U.S. Coast Guard crew. She went to Alaskan waters in October 1944 for convoy escort service, remaining there until June 1945, when she returned to the "Lower 48" for an overhaul. In August of that year, Sausalito was leased to the Soviet Union, in whose navy she served as EK-13.

Sausalito was returned to United States custody in November 1949. Placed in reserve in Japan, she was recommissioned in September 1950 for Korean War service. She was harbor control frigate at Hungnam, North Korea, during the evacuation of that port in December 1950. In first half of 1951 she performed a variety of escort, blockade, patrol, shore bombardment and harbor control duties along the Korean coast. Sausalito was sent to the Philippines area in October 1951 and patrolled in the western Caroline Islands during the last part of the year. Following a good-will tour of Southeast Asian ports, she again took up station along the Korean coast in February 1952. Decommissioned in June 1952, Sausalito was transferred to the Republic of Korea the following September. She was renamed Imchin and served as a unit of the ROK Navy for over twenty years thereafter.