It was like a duel between two knights of old. Each combatant knew the look and reputation of the other. Only this time, on one side was a giant white Sunderland flying-boat and on the other, a black-hulled German submarine, the U-37. Dick Stapleton and an Aussie crew flew the “Flying porcupine”; the merciless Nazi, Kapitan von Bloeke, commanded the U-37.

The North Sea convoy routes just weren’t big enough for both of them…