Take control of every aspect of a U-boat, from the torpedo data computer to the deck gun.

For hours, they drifted at 150 meters. The depth charges exploded above, shaking lightbulbs from their sockets and sending jets of seawater spraying from strained rivets. The crew watched the depth gauge, holding their breath as if the destroyers above could hear their very lungs.

Vaughn maneuvered into the "shadow zone," tracking the merchant ships by sound alone. He calculated the solution: depth, speed, and angle. "Tube one... Fire!"

If you are looking to experience this tension yourself, is a classic submarine simulation that focuses on the German U-boat campaign during World War II.

Days passed in the "Silent Service." Then, the hydrophone operator signaled: a slow, rhythmic beat. A convoy.