Originally Posted by
KenHamer
There's a perfectly rational reason to disallow the use of PEDs during takeoff and landing.
Claiming that the devics will interfere with navigation electronics is not.
The claim of "may interfere" is valid, the claim of "will interfere" can be challenged, but a "may interfere" is enough of a reason for the certifying and regulatory authorities to place restrictions on the use of PEDs in flight.
For aviation safety, a device has to be proven safe via the ARP4761 (in conjunction with ARP4754A at times) process - which is currently under a rewrite. Until a device has been proven to be safe, it is assumed to have some level of risk of not being safe.