Elek Science, 1st ed., 1973. Xvii + 253 pp., many diagrams. Laminated pict. boards. 22 x 14cm. V.G.+. "An account of the application of O.R. in the war against the U-boats, which was written in 1946-47 and reached galley proof stage ' before the changing political climate caused the Security Authorities to withdraw permission for publication '" This is its first publication. Professor Waddington explains O.R. (Operational Research), its nature and functions in the fight against the U-boats during the Second World War. O.R. involved the Royal Navy of course, but RAF Coastal Command's major operations were directed against U-boats and much of this study is based on their experience. The author describes some general principles of anti-submarine warfare, the organization of effort required, some of the background problems encountered and overcome, the role of radar, visual problems, principles of attack, and the anti-U-boat operations themselves. VERY SCARCE.