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[–] prairie [S] 1 point -1 points (+0|-1) ago  (edited ago)

Or rather, your device measures the times and calculates itself. What about GPS working in the middle of the desert, or middle of the ocean, with no towers nearby? Or where there are lots of trees etc.?

[–] [deleted] 0 points 2 points (+2|-0) ago 

[Deleted]

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[–] prairie [S] 1 point -1 points (+0|-1) ago 

Typically there are lots. Right now mine is picking up 11 satellites. And GPS does have problems in buildings with things overhead.

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[–] CalibanFresco 0 points 1 point (+1|-0) ago 

It doesn't matter if you are somewhere without a radio tower nearby. Radio signals go pretty far. Since the world is flat, it just takes a little longer for the radio signal to reach it and bounce back. Just a higher ping. I mean, it's not like the signal has to worry about its target disappearing past a horizon that isn't there. And if there are trees or buildings around, so what? Radios work in forests and cities all the time. I think you underestimate the penetrating gaze of the radio wizards. That's why wizards live in towers. Because they're so high up, they can see so much farther. Science.

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[–] prairie [S] 1 point -1 points (+0|-1) ago 

One problem with radios is reflections.

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[–] BjornIronside 1 point -1 points (+0|-1) ago 

It doesn't. I've been to places in Canada where gps, and "satellite" phones do not work.