Transport
Why GPS stops working at extreme speeds and heights
HERE’S THE INTERESTING PART
The reason your navigation app occasionally thinks you're driving into a river isn't entirely an accident. Built-in limits (known as COCOM limits) shut down GPS tracking if a device moves faster than 1,000 knots or higher than 60,000 feet. This prevents your average backyard hobbyist from duct-taping an iPhone to a rocket and starting a global crisis.
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