 In the Battle of the North Cape in December 1943, torpedo hits from British destroyers and slowed the German battleship enough for the British battleship to catch and sink her, and in May 1945 the British 26th Destroyer Flotilla (coincidentally led by "Saumarez" again) ambushed and sank Japanese heavy cruiser .At the beginning of World War II, Hedy Lamarr and composer George Antheil developed a radio guidance system for Allied torpedoes, intended to use frequency-hopping technology to defeat the threat of jamming by the Axis powers.Although the US Navy did not adopt the technology until the 1960s, various spread-spectrum techniques are incorporated into Bluetooth technology and are similar to methods used in legacy versions of Wi-Fi.