Navsop working on coin-sized GPS rival that navigates using wifi and TV signals
BAE claims that while Navsop is still in the early stages of development, it will eventually fit into a gadget about the size of a standard coin. At present, however, Navsop resides in a massive box that must be lugged around in a car and attached to a whip antenna. Not exactly smartphone compatible.
Navsop isn't entirely independent from GPS, however. The system must first get its bearings from the satellites in the sky before turning to radio signals.
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