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 son. In August 2009, Rina Hever also met with Israel's Foreign Ministry director general Yossi Gal. The mother, who in the past sought the ministry's aid in finding her son yet was only accorded limited cooperation, requested that the government seriously broach the matter with the Syrians via an intermediary. In the end of July 2009, Israel launched a quiet diplomatic campaign in an attempt to ascertain the whereabouts of Hever. Israel passed a message along to Syria via Russian Foreign Minister Sergei Lavrov in which Jerusalem communicated its desire to obtain any information that Syria may possess on Hever.