Re: FAA
The primary reason for all the rigamarole is electromagnetic interference; there's a constant concern even one little adjustment will snowball, cause an airliner to crash
Nope. The biggest concern is interference with the magnetic compass[1], which has always been the primary navigation instrument. Since the advent of GNSS, that might be going away...
Vic.
[1] The aircraft I fly are have placards to tell you the measured compass error when the radio is switched on.
Biting the hand that feeds IT
