(PF-91: dp. 1,246; 1. 301'6", b. 36'6"; dr. 13'8"; s. 20 k.; cpl. 194; a. 3 3", 4 40mm.; cl. Tacoma)
Originally classified as a gunboat and designated
PG-199, Tortola was reclassified as a frigate and redesignated PF-91 on 15 April 1943, her keel was laid down on 16 October 1943 at Providence, R.I., by the Walsh Kaiser Co., Inc.; launched on 16 November 1943; completed on 15 May 1944, and transferred under lend-lease agreement to the United Kingdom on the same day. She served the British Navy as Tortola ( K.595).
The ship operated in the Arctic in 1944 with the 20th Escort Group on the Russian convoy route into December. She augmented this with service in the Atlantic in both 1944 and 1945. With the end of the war, she proceeded to the United States, arriving at Boston on 9 May 1946, and was returned to the United States Navy on 22 May 1946. On 17 June, she was authorized for transfer to the Maritime Commission for disposal and, on 3 July 1946, her name was struck from the Navy list. Sold to John J. Duane Co. of Quincy, Mass., on 17 January 1947, she was resold to Washburn Wire Co. of Philippsdale, R.I., on 10 September 1947 and scrapped.