HMCS Magog was a River-class frigate serving in the Royal Canadian Navy during the Second World War. Designed by William Reed of Smith’s Dock Company, the vessel was constructed to improve convoy escort capabilities, featuring significant enhancements over previous corvette classes. Laid down on 16 June 1943 by Canadian Vickers Ltd. in Montreal and launched on 22 September 1943, Magog was commissioned on 7 May 1944 at Quebec City, bearing the pennant number K673. The River-class frigate was characterized by its twin screw propulsion, which provided a modest increase in speed—about three knots—yet extended its operational range to nearly 7,200 nautical miles at 12 knots. Its armament included a twin 4-inch gun mount forward, a 12-pounder aft, and anti-submarine weaponry such as Hedgehog mortar, depth charges, and side-mounted throwers. The class was also equipped with advanced sonar systems, including the 147B Sword horizontal fan echo sonar transmitter, alongside ASDIC, radar, and direction-finding gear, enhancing its ability to detect and track submarines. Constructed as part of Canada’s 60 frigates program—some built along the St. Lawrence River and West Coast—Magog was initially assigned to escort group EG 16, patrolling the eastern Canadian coast. She participated in convoy escort duties, notably escorting Convoy ON 256 and Convoy ONS 33 in October 1944. Her service was marked by a notable event on 14 October 1944, when she was torpedoed by German submarine U-1223 near Pointe-des-Monts, Quebec. The attack resulted in the loss of 65 feet of her stern, with three crew members killed and three injured. Despite the damage, Magog survived, was towed to safety, and later to Quebec by salvage vessels. However, she was declared a total constructive loss and paid off on 20 December 1944. She was sold in 1945 to Marine Industries Ltd. and scrapped in 1947. Her brief but active service exemplifies the critical role of Canadian-built River-class frigates in the Battle of Atlantic and convoy protection during WWII.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.