Comment Comment by cyberax > Does your phone's GPS work in a tunnel?My car's GPS does, using dead reckoning.Trains can also use dead reckoning./me checks notes, I've heard that they move on inflexible things called "rails" that almost never change the location. parent cyberax 1 day ago
My car's GPS does, using dead reckoning.
Trains can also use dead reckoning.
/me checks notes, I've heard that they move on inflexible things called "rails" that almost never change the location.