Survival at Altitude for Heavy and Very Heavy Bomber Crews is a comprehensive manual originally prepared by the United States Army Air Forces during World War II to educate bomber crews on the unique challenges and dangers of high-altitude flight. This detailed guide addresses the physiological effects of flying at extreme altitudes, such as hypoxia, decompression sickness, and the impact of cold temperatures, and provides practical advice for recognizing and managing these risks. The book covers the use and maintenance of oxygen equipment, the importance of proper clothing and nutrition, and emergency procedures for situations like rapid decompression or forced landings in remote areas. It also discusses the psychological stresses of combat missions and offers strategies for maintaining mental alertness and teamwork under pressure. Illustrated with diagrams and photographs, Survival at Altitude for Heavy and Very Heavy Bomber Crews serves as both a technical reference and a survival handbook, reflecting the critical knowledge required for airmen operating B-17s, B-24s, B-29s, and similar aircraft in the demanding conditions of wartime aviation. This manual remains a valuable historical document, offering insight into the training, technology, and survival strategies that helped shape the success of Allied air operations during the Second World War.