HMS Hever Castle (K521) depth on the fuses of the projectiles until the moment of firing. A single Squid-launched attack had a success rate of 25%. The class was also provided with HF/DF and Type 277 radar. "Hever Castle" was ordered on 23 January 1943. The ship, named for Hever Castle in Hever, Kent, was laid down on 29 June 1943 and launched on 24 February 1944. At some point in 1943, the ship was transferred to the Royal Canadian Navy. The corvette, renamed "Copper Cliff" after a suburb of Sudbury, Ontario, was commissioned into the Royal Canadian Navy on 25 February 1944 with
Hever Golf Rose where she led from the start to take the Goldene Peitsche by two lengths from the Haydock Sprint Cup winner Lavinia Fontana. Hever Golf Rose's next two races took her to France. At Chantilly she was sent off the 11/10 favourite for the Prix de Seine-et-Oise in which she raced prominently and held off the late challenge of Tereshkova to win by a neck. Joe Naughton called her "an amazing filly" after the win, while the press commented on her "remarkable" season. After four races in twenty-five days, Hever Golf Rose was given a "break" of three weeks before her