The Royal Canadian Navy (RCN) was assigned responsibility for anti-submarine warfare (ASW) and controlling sea space in the western North Atlantic.The St Laurent class were built to an operational requirement much like that which produced the British Type 12, and were powered by the same machinery plant.They were built to counter nuclear, biological and chemical attack conditions, which led to a design with a rounded hull, a continuous main deck, and the addition of a pre-wetting system to wash away contaminants.[7] The St. Laurent class was fitted with twin 3-inch (76 mm)/L50 caliber guns in two mounts for engaging both surface and air targets.As with the British Type 12 design, the provision for long-range homing torpedoes (in this case BIDDER [Mk 20E] or the US Mark 35 were included.[7] Following successful trials aboard the frigate Buckingham and sister ship Ottawa, plans to convert the St. Laurent class took shape.[16] In February 1960, Saguenay, accompanied by Ottawa and St. Laurent, began a training tour of the Pacific, making several port visits.[16] On 16 August while taking part in NATO naval exercises, Saguenay collided with the German submarine U-17 and was sent home for repairs.The fishing ship Concordia, who refused to stop, bumped the Canadian warship three times causing minor damage to Saguenay.
Saguenay
(first from right) underway in a Standing Naval Force, Atlantic group in 1982.