Built for the RN at Vancouver but transferred to the RCN for manning, she was commissioned on May 27, 1942, and served with Esquimalt Force until March 17, 1943, when she left for Halifax. On her arrival there on April 30 she was assigned briefly to WLEF and, in June, to Halifax Force. In November and December 1943, she was lent to Newfoundland Force but was withdrawn owing to engine trouble. On January 9, 1944, while en route to Baltimore for refit, her engines broke down in a storm, and she made 190 miles under improvised sail before being towed the rest of the way to her destination. Upon her return to Halifax in April, Lockeport was ordered to Bermuda to work up, and on the homeward journey she escorted the boats of the 78th Motor Launch Flotilla. Returning to Sydney Force in May, 1944, she was frequently an escort to the Port-aux-Basques/Sydney ferry. She left Canada on May 27, 1945, for the U.K., and was returned to the RN at Sheerness on July 2, to be broken up three years later.