Originally Posted by
Gauges and Dials
Not without referencing signals from GPS satellites, they couldn't. The unit in question here does not depend upon any external signals
Neither do the inertial units in modern phones/tablets. Yes, they use GPS, wi-fi, whatever to update/refine absolute position but the inertial bits don’t drift at up to 12kts in a random direction. I saw some research where they got a (fairly old) iPhone, took it for a stroll around for a while including buildings, stairs, cars, etc. and it had drifted by fractions of a metre (on purely inertial) by the time they got back to the starting position.
With the kind of specs quoted this device wouldn’t be useful even for RNP-10!