A swift trail of bubbles — if you see it and a roar like a thousand express trains crashing — if you hear it. That’s all the warning you get when a torpedo hits home.

Lieutenant Commander Dave Miller lost his destroyer just like that to Kapitan Karl von Sturm, top Nazi U-Boat ace known as the “Sea Wolf”. The way things were going, Dave was liable to lose another ship…unless he got to the “Sea Wolf” first.