 "U-100" departed for her second active patrol on 11 September 1940, coming into contact with the Allied convoy HX 72.HX 72 lost 11 ships in total, with Schepke and U-100 accounting for 7 ships of 50,340 tons.In the attack on this convoy, while other U-boats stood off to the side and fired their torpedoes to little or no success, Schepke penetrated inside the convoy before attacking, a tactic soon adopted by the C-in-C U-boats, Admiral Karl Donitz.