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11th May, 2016

DARPA is building acoustic GPS for submarines and UUVs

 

It will utilize undersea sounds instead of satellite feeds.

For all the benefits that the Global Positioning System provides to landlubbers and surface ships, GPS signals can’t penetrate seawater and therefore can’t be used by oceangoing vehicles like submarines or UUVs. That’s why DARPA is creating an acoustic navigation system, dubbed POSYDON (Positioning System for Deep Ocean Navigation), and has awarded the Draper group with its development contract.

The space-based GPS system relies on a constellation of satellites that remain in a fixed position relative to the surface of the Earth. The GPS receiver in your phone or car’s navigation [...]

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30th March, 2016

Waze will warn you when you’re speeding

By Jon Fingas

You won’t be caught off-guard just because you couldn’t see a speed limit sign.

If you drive in unfamiliar areas often enough, you’ve probably run into situations where you couldn’t spot a speed limit sign or were too busy finding your way to notice. However, Waze has some relief in sight: it just started rolling out an alert feature that makes it clear when you’re breaking the speed limit on a given street. You can tell it whether or not to sound an alert, and even force the alert to show only when you run over the limit by a set percentage — helpful for those fast-paced roads where obeying the limit actually makes you a [...]

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