Commissioned on September 19, 1941, at Quebec City, Shawinigan arrived at Halifax on October 27. She joined Sydney Force in November but on January 13, 1942, arrived at St. John's to join Newfoundland Command. She left January 25 to escort convoy SC.66 to Londonderry, the first of three round trips. In mid-May she left 'Derry for the last time, and in June was assigned to Halifax Force as escort to Quebec-Labrador convoys. She joined WLEF that November, almost immediately commencing a refit at Liverpool, N.S. This refit was completed in mid-March, 1943, and in June Shawinigan joined the recently established EG W-3. In April, 1944, while undergoing another refit at Liverpool, she was transferred to W-2 and, on completion of the refit in mid-June, proceeded to Bermuda to work up. On November 25, while on independent A/S patrol out of Sydney, she was torpedoed in the Cabot Strait by U 1228 and lost with all hands.
While on independant anti-submarine patrol in the Cabot Strait, she was torpedoed and sunk by U1228, 25 Nov 44. All hands were lost. Click here for more information.