A rocket carrying a GPS satellite launches in July 1997. (Joe Skipper / Reuters) “Radio signals do not propagate very far underwater,” says Joshua Niedzwiecki, the director of sensor ...

Underwater, it's a different story. GPS doesn't penetrate the briny deep, so Darpa, the Pentagon’s research arm, wants a system that will keep the robots plumbing the oceans on the map ...

MIT scientists have developed an acoustic system that acts like an underwater GPS, yet doesn't need batteries to operate. The Underwater Backscatter Localization (UBL) system is powered by ...

The technology, in effect, doesn't mix well with water, which breaks down the radio waves GPS relies on to function. MIT scientists have been looking at ways to create a new type of underwater ...

The program will produce a navigation system that eliminates the need to surface for updated GPS data. This underwater system ultimately aims to keep U.S. Navy underwater vehicles save by ...

The United States could soon get advanced technology in unmanned airborne detection and tracking of enemy submarines as two ...

This speaks to just how extremely difficult it is to find anything underwater, whether it's the size of the Titanic or a small 21-foot-long submersible. It's not like you can simply turn on a GPS ...

Right now, GPS signals can barely go below. “Radio signals do not propagate very far underwater,” says Joshua Niedzwiecki, the director of sensor processing at BAE Systems. BAE is ...