Koblenz, 1st.ed., 1988. (German text). 64 pp., profusely illustrated with photographs (some cold.), plans & diagrams. Black cloth, with original card covers bound in. 30 x 22 cm. FINE. (See also No. 238 below) This copy of this German journal was previously owned by the late Dr. David Westwood (1942-2016) whose library we recently purchased. Dr. Westward was author of Anatomy of the Ship : The Type VII U-Boat first published in 1984 and revised in 2003. (See No. 237). Profusely illustrated with photographs, diagrams and detailed plans, this German study describes every aspect of the Second World War Type XXI diesel-electric submarine, a type rushed into production and as a result suffered significant defects. Only four boats of this class were completed during the conflict, but they were the first submarines designed to operate submerged rather than spending many hours on the surface. The design was more successful after the war, and almost all navies either took XXIs into service, or built their own based on this design : British ‘Porpoise’, US ‘Tang’, and the Soviet ‘Whisky’.