Image Cache: Learning to control a submarine is not straightforward. But these days, the Navy doesn't need to build as many large-scale physical simulators -- because much of it can be achieved on-screen.
In this image, two sailors explore the engine rooms of a submarine using the Navy's touch-screen training simulator. They can use the software to explore how the submarine's power systems work, sliding controls and turning knobs to explore how it will react to their command. And if something goes wrong, they're just stood at a computer -- not stuck hundreds of meters underwater.