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 was sent to Sweden where she finished fourth in the Taby Varsprint. Hever Golf Rose now began the most successful period of her career, winning seven of her next eight races. After winning a Listed race in Bremen, she stayed in Germany to take the Group Three Holsten Trophy beating Desidera by one and a half lengths. She returned to England for the King George Stakes at Goodwood for which she started at odds of 10/1. Hever Golf Rose appeared to be struggling and short of space to run in the early stages but produced a "strong burst" of speed