Re:Subterranea Britannica
by lnanek2 on Sunday May 22, 2016 @01:04PM
(#11749327)
GPS doesn't work underground.
[ Parent
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Re:Subterranea Britannica
by B1FF_PSUVM on Sunday May 22, 2016 @03:23PM
(#11749870)
A few WiFi beacons and some inertial guidance, done.