← U-boat Commanders Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All Joachim Schepke Commander of the U-100; often labeled "The Definitive U-boat Commander" Günther Prien Commander of the U-47; nicknamed the "Bull of Scapa Flow" for his daring raid on a British naval base Otto Kretschmer Commander of the U-99 and Germany's top-scoring ace Heinz Eck The only U-boat commander to be executed for war crimes Wolfgang Lüth One of two U-boat commanders to be awarded the Knights Cross With Oakleaves, Swords, and Diamonds