Decoding History

W.J.R. GARDNER is now a civil servant having previously served in the Royal Navy for nearly 30 years, where he was a specialist in anti-submarine warfare. In the last decade he has made contributions to many historical conferences on 20th century naval historical topics internationally. He has also contributed to several books and has had many articles published. His previous works include Antisubmarine Warfare and he is now working on a biography of Admiral Sir Bertram Ramsay.

• List of Tables and Figures Foreword: Geoffrey Till Acknowledgements Acronyms, Abbreviations and Foreign Language Terms The World War and the Atlantic Campaign Chronology, Time and Measurement The Economic Context The German Perspective Convoy Warfare Technology on Both Sides Signals Intelligence and the Battle of the Atlantic Case-Study I - 1941 Case-Study II - Mid-1942 to Mid-1943 Conclusion End Notes Bibliography and References Index

'A highly professional, balanced and rigorous analysis that should have a wide appeal.' - Eric Grove, Deputy Director, Centre for Security Studies, The University of Hull 'This is a penetrating and powerful analysis. This book is of pivotal importance to naval history and required reading for every student of the conflict at sea during the Second World War.' - David Synett, Professor of History, Queen's College, The City University of New York