seamustheseagull t1_j5txdsg wrote
Reply to comment by ggrieves in TIL that the European Union developed a satellite navigation system called Galileo, which can provide an accuracy of up to 20 cm (0.7ft) on smartphones, while GPS only reaches around 3 meters (10ft) by apeowl
Nevertheless, I believe GPS devices sold in the US are still required to shut off above a certain speed/altitude, much to the annoyance of amateur rocket/balloon people.
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