Commissioned on July 25, 1944, at Quebec City, Coaticook proceeded to Bermuda in mid-September for three weeks' working up. She was then assigned to EG 27 with which she served on anti-submarine and support duties out of Halifax for the balance of the war. In June, 1945, Coaticook sailed to Esquimalt, where she was paid off into reserve on November 29. In 1949 her stripped hull was sunk for a breakwater at Powell Rives but was refloated in 1961. On December 14, 1961, while in tow for Victoria to be broken up, the hull was found to be structurally unsound and instead scuttled off Race Rock.
Named for Coaticook, Quebec.