[mildchalupa]

Large CNC machines that are not exportable under ITAR use GPS and other sensors to detect movement.

[ragebol]

Are those not afraid of GPS spoofing either? Spoof GPS near a big CNC machine shop that a big competitor relies on, disable their machines...

[roarcher]

I didn't know that, that's wild. Does the government actually track their location in real time?

[DavidPeiffer]

I believe the machines generally disable themselves and need a factory technician to re-enable them should they fault out.

[TeMPOraL]

I've heard it justified as a safety measure - those machines are carefully balanced on installation, and if the sensors detect it being moved, the machine locks itself out to avoid damaging itself, workpieces and/or operators.