Author: Winton, John,
Title: ULTRA AT SEA.
Description: Leo Cooper, London, 1988, 1st edn., 212pp, 8pp half tone photo ills., blue cloth lettered in gilt at spine, pictorial dustwrapper by John Darlington, the first detailed examination of the use to which the Royal Navy was able to make of the invaluable Enigma intercepts, Ultra, and the profound effect they had on the conduct of the war at sea, including naval actions against the Bismarck, the tracking dowm of Bismarck's tankers and supply vessels, the 'Channel Dash' from Brest, the Tirpitz, the Arctic convoy PQ17, the U-boat war 1941-42 and the 1943 convoys TM1, SC118, HX229, SC122, ONS5, the Bay of Biscay offensive of 1943, ULTRA in the Mediterranean 1941-42 and how ULTRA was nearly lost. The use that was made of ULTRA had to be extremely judicious, too many conicidences of being in the right place at the right time would give away the fact that the Allies were accessing the secret code generated by the Axis Enigma machines, tanning to edges, light foxing to upper edge, dustwrapper: sunning to spine and upper panel, faint foxing to flaps, very good plus in a very good dustwrapper,

Keywords: war ww2 navy royal code intelligence nid room39 intercepts enigma ultra strategy tactics PQ17 TM1 SC118 HX229 SC122 ONS5 bletchley park


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