This is the complete wartime translation by the U.S. Navy of the 1943 edition of the official handbook given to all U-boat commanders. The original handbook was compiled from combat reports and was regularly updated throughout the war. The handbook was an invaluable reference for every operational U-boat commander. Simply written and highly accessible for a wider audience, the U-boat handbook attempted to anticipate every possible situation and to advise on suitable tactics. This superb war-time primary source is enhanced by a rare series of photographs taken on an actual combat patrol and published during the time of the Third Reich in the book "U-Boot Auf Feindfahrt". Together the handbook and these rare photographs provide a fascinating glimpse into the world of the U-boats from a first hand perspective, and is essential reading for anyone interested in World War II from primary sources. This book is part of the 'Hitler's War Machine' series, a new military history range compiled and edited by Emmy Award winning author and historian Bob Carruthers. The series draws on primary sources and contemporary documents toprovide a new insight into the true nature of Hitler's Wehrmacht. The series consultant is David Mcwhinnie creator of the award winning PBS series 'Battlefield'.