torpedo boom การใช้
- The German ships had been scheduled to depart Brest at but were delayed by a Bomber Command raid, had been ordered after PR had found the ships still in harbour with torpedo booms deployed at For the previous week, Enigma had been providing information that the Germans were minesweeping on a route that made a dash up the Channel a certainty and with reference to captured charts gave away the German route, which was passed on by the Admiralty at on 12 February . ( The daily naval Enigma Home Waters settings for took Bletchley Park until 15 February to break .)