USS Shelter (AM-301) was an built for the United States Navy during World War II. After service in the Pacific during World War II, Shelter was decommissioned in June 1946 and placed in reserve. In January 1964, she was transferred to South Vietnam for service in the Republic of Vietnam Navy as RVNS Chi Linh (HQ-11). She remained in South Vietnamese service until the collapse of that country in 1975. Chi Linh was one of several ships that fled from South Vietnam to the Philippines. She was then commissioned into the Philippine Navy in April 1976 as RPS Datu Tupas (PS-18), named after a chieftain of Cebu. The ship's fate is not reported in secondary sources. U.S. Navy service Shelter was laid down on 16 August 1943 by Winslow Marine Railway and Shipbuilding Company of Winslow, Washington. The ship was launched on 14 November 1943, sponsored by Miss Patricia Whittenberg, and commissioned on 9 July 1944. Shelter conducted shakedown training at San Pedro and sailed from San Francisco on 21 October as escort unit for a convoy which entered Pearl Harbor on 30 October. Returned to San Francisco escorting merchant ships. On Thanksgiving Day, Shelter left San Francisco and returned to Pearl Harbor. After assault minesweeping exercises off Maui she departed Pearl Harbor on 5 January with an amphibious assault force, which Shelter escorted to Saipan. Shelter then continued to Tinian for supplies and then escorted USS Guide, flagship of COMMINEPAC to Iwo Jima that arrived off the island on 16 February 1945. She made pre-invasion sweeps with Mine Division 36 consisting of six ships, which were ordered to fire on shore, and to retire if fire returned which it did, possibly because one of the other ships destroyed a Japanese radar emplacement. A larger ship then attacked the revealed emplacements. Troops stormed ashore on 19 February and the Shelter remained on patrol and screening station until 28 February; then helped guard an amphibious (damaged LSTs) group to Saipan before proceeding to Ulithi, Western Caroline Islands, arriving on 9 March for logistics and preparations for the coming Okinawa campaign. At an unknown time prior to Okinawa, USS Shelter was refitted to add a combat operations center, which replaced the captain's bunk on the bridge (one level below the flying bridge). This was a possible reason for recommissioning in 1964. Shelter had only surface radar, so incoming flights were relayed with