Pandemous originally was laid down as the LST-542-class tank landing ship USS LST-650 on 20 July 1944 by the Chicago Bridge and Iron Company at Seneca, Illinois. While under construction, she was reclassified as a landing craft repair ship and re-designated as ARL–18 on 14 August 1944 and named Pandemus on 11 September 1944. She was launched on 10 October 1944, sponsored by Mrs. Laura Sauter Gasperik, and placed in reduced commission on 21 October 1944 for transit to New Orleans, Louisiana, then decommissioned on 3 November 1944 for conversion to a landing craft repair ship by Todd Johnson Dry Dock, Inc. After the conversion was complete, she was commissioned in full on 23 February 1945.

1st commission, 1945–1946 edit

Pandemus departed New Orleans on 12 March 1945 for shakedown out of Panama City, Florida, and returned for alterations on 26 March 1945. On 4 April 1945, she stood down the Mississippi River, bound by way of the Panama Canal, Hawaii, the Marshall Islands, the Mariana Islands, and Ulithi Atoll to Hagushi anchorage, Okinawa. There she tended and repaired infantry in 1945.^[1]

Pandemus touched at Guam and Saipan on her way to San Pedro Bay, Leyte, Philippine Islands. She serviced landing and small craft in that area and then at Okinawa and Shanghai, China. She was put to sea from Shanghai on 21 December 1945 and steamed by way of Pearl Harbor, Hawaii, to San Pedro, Los Angeles, arriving there on 5 February 1946. She departed San Pedro on 11 February 1946 on her way to Mobile, Alabama, where she arrived on 3 March 1946. She shifted to Algiers, Louisiana, on 4 July 1946 and decommissioned there on 23 September 1946.

2nd commission, 1951–1968 edit

Pandemus recommissioned at Green Cove Springs, Florida, on 14 December 1951. After fitting out at Merrill Stevens Shipyard at Jacksonville, Florida, she visited Norfolk, Virginia, on 23 January 1952 and arrived at her new home port, the U.S. Naval Minecraft Base at Charleston, South Carolina, on 30 March 1952 and began 16½ years of service supporting minesweeping operations along the United States East Coast from Newport, Rhode Island, to Key West, Florida, and in the Caribbean and Gulf of Mexico.

Pandemous decommissioned on 30 September 1968 and was struck from the Naval Vessel Register on 1 October 1968. She was sunk as a target in late 1969.

Pandemus received one battle star for World War II service.

• This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here.
• "LST-650 / ARL-18 Pandemus". Amphibious Photo Archive. Retrieved 26 April 2007.