From the hand powered Turtle of the American Revolution to modern nuclear submarines, this explores the engineering that lets submarines remain hidden for months. Inside the reactor, oxygen systems, ...

Nuclear submarines carry out multiple types of missions, but no matter the mission, it's vital that they remain hidden in the ocean's depths.

Refueling a nuclear submarine isn't quite as simple or quick as putting gas in your car. Here's why it takes years to get a nuclear sub back in the water.

The U.S. Navy today possesses the most technologically advanced submarine force in the world. Its nuclear-powered attack submarines and ballistic missile submarines remain unmatched in speed, ...