Courser was laid down as YMS-201 on 28 August 1942 by the Hiltebrant Dry Dock Co. of Kingston, New York; launched 19 November 1942; and completed 24 July 1943. On 17 February 1947, YMS-201 was reclassified as AMS-6, and named Courser the following day. Courser was reclassified MSC(O)-6 on 7 February 1955. Courser was struck from the Naval Vessel Register on 1 November 1959. Her ultimate fate is unknown.