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
Guy Hever Release of the Golan Heights" claimed to be holding Hever. The credibility of the statement is in doubt, since it came ten years after Hever's disappearance. Army officials said at the time that the IDF was investigating the claim, although it stated that this was not the first time that an organization claimed to have Hever in captivity. In July 2009, Rina Hever, said that she met with Israel's Prime Minister Benjamin Netanyahu. The premier pledged that a special point-man would be named to oversee the activity undertaken by the various defense agencies in the state in finding her missing