The BYMS class was a class of wooden motor minesweepers, part of the US Navy YMS Yard class minesweepers. 150 ships destined for UK were launched from 1941 to 1943. The initial 80 ships were ordered by the U.S. Navy specifically for transfer to the United Kingdom under the Lend-Lease Programme. On transfer to Britain, BYMS-1 to BYMS-80 were assigned the British pennant numbers BYMS-2001 to BYMS-2080. Names were not assigned to the class members.