The American submarine S33 is deployed in the Atlantic to reach the U-571 seriously damaged U-571 in order to steal an Enigma costing machine, which allows Kriegsmarine to communicate in secret with its U-Boote and to keep the advantage in the naval war in the Atlantic. During the attack on a refueling convoy combined in 1942, the German submarine U-571 undergoes serious damage following grenading. The submarine having transmitted its position by ENIGMA, a German supplier is therefore sent on site for repair. The transmission is intercepted by Allied information, while the departure of the supply is indicated by the French resistance. This offers an unprecedented opportunity for allies. Indeed, Enigma allows, among other things, the German Navy to secure its transmissions with its fleet a.
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