HMS Decoy was a D-class destroyer of the Royal Navy, built by John I. Thornycroft & Company, with construction beginning on 25 June 1931 and launching on 7 June 1932. She was completed on 17 January 1933, costing approximately £225,236 excluding armament and equipment. Displacing 1,375 long tons at standard load and up to 1,890 long tons at deep load, Decoy measured 329 feet in length, had a beam of 33 feet, and a draught of 12 feet 6 inches. Her propulsion system consisted of Parsons geared steam turbines driving two shafts, producing 36,000 shaft horsepower, enabling her to reach a top speed of 36 knots. She was equipped with three Admiralty 3-drum water-tube boilers and carried enough fuel oil—473 long tons—to achieve a range of 5,870 nautical miles at 15 knots. Her complement was 145 officers and men. The armament configuration included four 4.7-inch Mk IX guns in single mounts ('A', 'B', 'X', 'Y'), a single 3-inch AA gun, and two quadruple Mark I mounts for 0.5-inch Vickers machine guns for anti-aircraft defense. She also carried two quadruple torpedo tube mounts for 21-inch torpedoes, along with one depth charge rail and two throwers, initially carrying 20 depth charges, later increased to 35 during wartime. Decoy's service history spanned from her initial deployment in the Mediterranean and China Station, where she participated in the Abyssinia Crisis, to extensive wartime activity. During WWII, she operated in the Mediterranean, West Africa, and the Indian Ocean, participating in notable actions including the sinking of Italian submarines Console Generale Liuzzi and Argonauta, and taking part in the Battle of Calabria. She was damaged by a near-miss from the Italian battleship Giulio Cesare and was bombed in Alexandria. In 1943, she was transferred to the Royal Canadian Navy, renamed HMCS Kootenay, and served primarily in Atlantic convoy escort roles, sinking three German U-boats and participating in Operation Overlord. She underwent multiple refits to enhance anti-submarine capabilities before being decommissioned and broken up in 1946. Throughout her career, HMS Decoy/Kootenay exemplified the versatility and resilience of Royal Navy destroyers during the interwar and wartime periods.

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