Form 2008. Card folder approximately 21.5 x 27cm. Marked 'SECRET', named to Flying Officer Goold, subject 'Shipping Recognition'. Print date 4/42. It contains 9 pages of typed (copied) information for a lecture on shipping recognition and provides details on older and more modern vessels and how to differentiate between bigger and smaller units within the German Navy. It also mentions Minelayers, Catapult ships, Destroyers, Torpedo boats, Submarines, MTB's or E-boats, R-boats, Minesweepers and Merchant shipping, Tankers and Special types. Not detailed information but presumably notes for the basis of a more in-depth lecture to aircrews. Some markings/stains and corroded paper-fasteners (split pins). An unsual find. Stock code P22873-204.