The Aces of the Deep were the ten
German U-Boat commanders during
World War II who sank the most enemy merchant ships during their naval services, ranked according to the total tonnage of the ships they sank. The term is related to
flying ace, a
World War I name for a pilot who shot down five or more enemy planes. The currently accepted list is as follows:Otto Kretschmer Otto Kretschmer was the most successful of the Aces of the Deep, sinking 47 merchant ships totalling 272,958 tons.
See more at Wikipedia.org...