BACKGROUND: Although there were official training manuals issued by the M.Dv., Marinedienstvorschrift, (Naval Service Regulations), there were also numerous semi-official and unofficial training booklets with the most famous being the Reibert series of training booklets. These semi-official and unofficial training booklets generally gained the approval of the High Command and were encouraged to stimulate interest in joining the Armed Forces.

PHYSICAL DESCRIPTION: Roughly 20cm x 13cm, forty page, unofficial training book compiled by, "Korvettenkapitän (Ing.) Max Bartsch", and published by, "Wilhelm Limpert", in Berlin in 1940. The mid-weight card stock cover of the book has a full color, cut-away drawing of a submarine with all the components numerically marked, from one to forty, with a corresponding glossary list of the individual components. The front cover also has the black printed title, "Was jeder vom deutschen U-Boot wissen müß", (What every German U-Boat Personnel must know). The text examines all the basic information required for personnel serving on a U-Boat including both offensive and defensive weapons. The book has five black and white photographs and three line drawings that reinforce the text.