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A comment on Amazon Prime Air. Parent comment

Re:Amazon Prime Air by tcas on Monday December 02, 2013 @11:59AM (#6834808)
Inertial navigation systems[1] have been used for more years than GPS has existed. Even now almost all military drones / rockets / ICBMs use very precise inertial systems.

[1] http://en.wikipedia.org/wiki/Inertial_navigation_system

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