Submarines operate for weeks or months beneath the ocean surface, cut off from the satellite signals that guide nearly every other modern vehicle. GPS radio waves cannot penetrate seawater beyond a ...

Inside a diesel engine's cylinder, compressed air raises the temperature to ignite injected fuel, and the resulting force drives pistons to power the vehicle's main gears. Chief to this combustion ...

We rely daily on the GPS on our phones to get to many different places in our lives. However, the technology stops working in the depths of the ocean, which is why submarines need something different.

Submarines have been a little mysterious since they were invented more than two centuries ago. That's because most submarines have been owned by the military. But recently, subs have started to get ...