Commissioned at Esquimalt on August 30, 1943, she arrived at Halifax October 21, worked up at Pictou and, in January, 1944, joined EG C-3 as Senior Officer's ship. Prince Rupert left St. John's on January 3 to join her maiden convoy SC.150, and was thereafter continuously employed as an ocean escort until late that year. On March 13, with U.S. naval units and U.S. and British aircraft, she assisted in sinking U 575 in the North Atlantic. In November 1944, she began a refit at Liverpool, N.S., and on its completion in March, 1945, joined EG 27, Halifax. In June, Prince Rupert sailed for Esquimalt, where sloe was paid off January 15, 1946. She was sold in 1947, and her hull expended as a breakwater at Royston, B.C., the following year.