How do submarines navigate?
Submarine Navigators and Quartermasters use normal navigational charts just like on any other ship, but pay closer attention to the depth of water. Submarines have a computer that knows how fast the ship is going and in what direction. This computer can also sense when the submarine turns; the Quartermaster gives a position and the computer keeps track of where the ship is going. Submarines also have an antenna that can receive signals from Global Positioning System (GPS) satellites.
