Plot: From the capture of U-505 to the sinking of the Lusitania; from the war games of Gilbert Roberts that man behind the fabled 'Operation Raspberry," which nullified the threat of German U-boats, to the highly cinematic deception at the heart of the Pentagon's capture of a sunken Soviet nuclear sub. Covert missions and secret strategies have been at the heart of naval engagement since the very beginning, often helping pick the winners