Enigma U-Boats, Revised Edition Breaking the Code

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More About This Textbook


"After World War I, German admirals were shocked to discover that the Royal Navy had penetrated their secret radio codes and the new, post-war navy set about creating a system so secure that such a breach would never occur again. The result was the now famous Enigma - the Impenetrable Puzzle. This machine was so complex that it was thought no one could break into it; not even when they had a captured machine at their disposal. The German High Command was convinced that the system was wholly secure and totally impregnable." "Their supreme confidence was, however, misplaced. During World War Two, Polish cryptanalysts helped Britain to break into the Enigma system used by the Luftwaffe and Army, but the naval version was more complicated. Even so, British cryptanalysts persevered and in the end they did manage the impossible; to break into this most complicated of ciphers. As a result they helped many merchant convoys avoid the teeth of the Wolf Packs." This book describes the story of how the tools for this incredible effort were extracted from the U-boats themselves. With a detailed analysis of the development of Enigma, its role during U-boat operations and the subsequent code-breaking at Bletchley Park, this book will be essential for all those fascinated by this enigmatic tool.

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Product Details

  • ISBN-13: 9781591142386
  • Publisher: Naval Institute Press
  • Publication date: 11/1/2009
  • Edition description: Revised
  • Pages: 224
  • Sales rank: 908,335
  • Product dimensions: 5.26 (w) x 7.70 (h) x 0.67 (d)

Table of Contents

Acknowledgements 5

1 Enigma - The Impenetrable Puzzle 7

2 The German Radio System 20

3 The First Naval Enigma Wheels - The Sinking of U33 27

4 Weather Ships for Bletchley Park 35

5 The Secret Capture 43

6 The Surrender of U570 71

7 Shark - The Four-wheel Enigma Code 86

8 Stranded in Africa 100

9 The Capture of U505 107

10 Other Secret Captures? 118

11 The Sinking and Raising of U250 134

12 Salvaging Secrets 142

13 U1024 - The Last Capture 151

14 Bletchley Park and the British Side 157

Appendix I Grabbing the Enigma: Occasions Where Allied Forces Boarded German Vessels 188

Appendix II Captured V-boats 194

Appendix III Weather Trawlers 206

Appendix IV Types of Convoy Escorts 210

Appendix V The Ireland Letter Code 211

Bibliography 213

Index 222

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