This book has been a concentrated work in progress since 1992 and includes a great amount of never before-published information resulting from new diving discoveries and further archival research. Categories that have been greatly expanded in this new book include: Descriptions of the wrecks; Descriptions of the artifacts, war supplies, and armaments; Drawings of wrecks showing important features. War histories of the ships; Japanese installations and defenses, descriptions, drawings, photos, and damage to; Japanese ships present during Operation Hailstone, including attacks on and damage to; Details of the Operation Hailstone, April 29-30, 1944, and Army Air Force aerial campaigns against Truk; Aerial combat between Japanese and American planes. American/Japanese planes lost; The Japanese response to Operation Hailstone. Atrocities against captured American flyers; Technical deep diving at Truk; Diving requirements and skill levels needed. This book has the most detailed and complete compilation of information regarding the Japanese occupation and build-up of Truk into a strategic naval base, the air campaigns against ships, aircraft, and installations, and the exploration/descriptions of the ships and aircraft wrecks ever written.