One expert says the federal government needs to develop a secondary system to avoid a disaster in the event the GPS system ...
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If GPS Fails, Can the Navy Still Sail?

When the USS Essex shut off GPS and sailed 1,800 miles with nothing but maps and sextants, it exposed a serious question: what happens when satellites go dark? In a world where everything from ...
Before GPS and radar, pilots flew by instinct and math. When those failed, the results were devastating - and often never ...