Commissioned at Midland on May 11, 1944, she arrived at Halifax June 17, having paid a visit to her namesake port en route. She arrived in Bermuda in mid-July for three weeks' workups and on her return was allocated to EG C-6, St. John's. Cobourg served with the group as a mid-ocean escort for the duration of the war, leaving Londonderry on March 27, 1945, to join convoy ON.293 for her last trip westward. She arrived at Halifax May 2 for refit and was paid off June 15 at Sorel to await disposal. Sold into mercantile service in 1945, she began her new career in 1947 under the name of Camco. In 1956 she assumed the name Puerto del Sol under Panamanian flag, and on July 1, 1971, burned and sank at New Orleans. She was later raised and scrapped.