A German submarine of the U-570 class was captured by the British in the Iceland area in September, 1941.  While this submarine was in the harbor of Hvalfjordur, Iceland, in the hands of a British temporary crew and standing by to be moved to the United Kingdom, it was inspected by Commander E.W. Sylvester, and Lt. Commander W.R. Headden, U.S. Navy, on September 23 and 24, 1941.

        A group of thirty-four photographs of the exterior and interior of the vessel was made by Ensign R.O. Anderson, Jr., U.S. Navy; a considerable number of booklets containing prints of these photographs, with legends, have been prepared by the Taylor Model Basin and forwarded for distribution.

        Ensign Anderson also photographed certain system diagrams of the submarine which were available on board at the time of the inspection.

        The Taylor Model Basin has translated the German legends and titles on these diagrams and has redrawn and reproduced them for ready reference use, complete with both German originals and English translations.

        The translation was done by F. Ravenm Senior Translator, of the TMB Staff, with the aid and advice of Captain H.E. Saunders, USN, who also edited the work for technical correctness.