In what year was the man under whose command the 1st U-boat Flotilla was founded born?
Karl Dönitz Karl Dönitz (sometimes spelt Doenitz) (] ; 16 September 1891 – 24 December 1980) was a German admiral who played a major role in the naval history of World War II. Dönitz briefly succeeded Adolf Hitler as the head of state of Germany.
Herbert Schultze Herbert Emil Schultze (24 July 1909 – 3 June 1987), was a German U-boat (submarine) commander of the "Kriegsmarine" (the German navy in World War II). He commanded "U-48" for eight patrols during the early part of the war, sinking  gross register tons (GRT) of shipping and earning him eighth place on the Aces of the Deep list.