Your GPS device will stop working if it goes above 1200MPH, or gets above 60,000ft.
Why? Because of the Red Menace. When the GPS system was designed, this limitation was put in place to ensure that the GPS devices would not fall into the hands of the Soviet Union and its allies and end up in control of Intercontinental Ballistic Missiles aimed at the US.
This means you really can't, despite what you may have heard, geocache on the International Space Station. (Don't blame me... blame Stalin.)
Just one more reason why communism is a bad idea.
Makes me wonder if the same is true about GLONASS.
