From Top Notch Comics #23 - On an English battleship which had just sunk an Italian warship outside the Tobruk harbor, Fran Frazer sees a survivor and talks Hal into jumping in to save him. The man still dies but not before revealing that German u-boats wait in the harbor to take out a soon-to-pass convoy. When no one believes them, Frazer dons a diving suit to get underwater pictures as proof.