The ship, originally designated a "patrol gunboat," PG-195, was ordered by the United States Maritime Commission under a United States Navy contract as USS Patton. She was reclassified as a "patrol frigate," PF-87, on 15 April 1943 and laid down by the Walsh-Kaiser Company at Providence, Rhode Island, on 29 September 1943. Intended for transfer to the United Kingdom, the ship was renamed Sarawak by the British and was launched on 25 October 1943. She was completed on 7 February 1944.
Transferred to the United Kingdom under Lend-Lease on 7 February 1944, the ship served in the Royal Navy as HMS Sarawak (K591) until decommissioned in 1945.[1]
The United Kingdom returned Sarawak to the U.S. Navy on 31 May 1946. She was scrapped in 1947.
. Henry Trevor Lenton. British & Empire Warships of the Second World War. Naval Institute Press. Annapolis, Maryland. 1998. 1-55750-048-7.