This book was originally published in 1944 by the Bureau of Ordnance as Navpers 1085, ¿Submerged Torpedo Tubes¿. Intended to familiarize submarine crews with the 21¿ Mark 32 to 39 torpedo systems, the book is richly illustrated with diagrams and photographs. In its pages you¿ll find a detailed explanation of the mechanisms and systems affiliated with underwater warfare, including firing mechanisms, interlock, flood and drain systems, and so on. Once classified ¿restricted¿, this book was recently declassified and is made available here for the first time. Some foldout pages have been reformatted, but care has been taken to preserve the integrity of the text.