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 surmised that he had gone AWOL and had subsequently committed suicide, citing his upcoming courtmartial and a history of previous clashes with commanding officers. Both the military and the police searched for him, including with divers, dogs, robots and aircraft, but no trace of his body or weapon was ever found. They refused to classify Hever as a missing soldier for three years. His mother however was convinced from the beginning that her son was kidnapped by Syrian forces, although the Syrian government consistently ignored overtures from former US president Jimmy Carter, former Israeli and Syrian US ambassador Edward Djerejian