 Complete the following phrase:  The Dutch destroyer Hr.Ms. Gerard Callenburgh was built by RDM Rotterdam and launched on 12 October 1939. The Dutch attempted to scuttle this ship during the German invasion, but the destroyer was salvaged and completed under German control with technical guidance from Blohm  Voss. She was commissioned as the ZH1 on 11 October 1942. The Germans retained most of the Dutch armament and equipment. The ZH1 spent most of her life on trials in the Baltic, but transferred to Western France via the English Channel in November 1943. When the western allies invaded Normandy in 1944, the German destroyers based in western France attempted to interdict the invasion armada. The German squadron was 