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 Castle is now open to the public as a tourist attraction. There have been three main periods in the construction of this historic castle. The oldest part of the castle dates to 1270 and consisted of the gatehouse and a walled bailey. The second period was when the castle, then in need of repair, was converted into a manor in 1462 by Geoffrey Boleyn, younger brother of Thomas Bolyen, Master of Gonville Hall, Cambridge. He added a Tudor dwelling within the walls. The third period of repair and renovation was in the 20th century, when it was acquired by William Waldorf