ULTRA AT SEA

Author: John Winton

Publisher: Leo Cooper

Year published: 1988

Pagination: 212pp, illustrations

Condition: vg in dw

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The application of "Ultra", the decoding of German signals by means of the Enigma decrypts and other methods, in the war at sea, 1939-1945, its role and impact on Royal Naval operations and successes such as the attack on the Battleship, Tirpitz in a Norwegian Fjord. It looked like luck at the time, but it was in fact the result of Ultra intelligence