Book excerpt: The 'manual' of the Underwater Demolition Teams During World War 2 the US Navy saw the need for specialized teams that could clear the way for amphibious assaults in many theatres of war. Underwater Demolition Teams would remove natural and man-made underwater obstacles which are likely to obstruct landing operations.. With not much more than swim shorts, mask, fins and explosives these commandos were sent in advance of major landings on beach recon missions or to clear underwater obstacles and booby traps. This manual outlines and describes the mission and tactical use of Underwater Demolition Teams, duties of team members, selection of trainees, organization of the school, methods and facilities for training, description and length of courses, instructional references, and training aids. • handling and use of explosives • underwater reconnaissance • removal of obstacles • mines and booby traps • seamanship • night vision and observation • use of rubber boats • physical conditioning • long distance surf swimming Illustrated with over 90 pictures and charts. A must-have for students of WWII special operations or U.S. Navy UDT aka 'Frog Men.' Bonus content: This volume also includes an additional 40+ page after-action report on the preparation, and results of the NCDU teams deployed in support the Normandy Invasions on D-Day, which includes their specific recommendations for future amphibious landings.