I have a question relating to an issue that has been raised in the MH370 tragedy, but I am posting it here because I am only interested in it as a theoretical question not related to any practical issues with any particular flight.
Is it technically possible for a hijacker (or wayward pilot) to disable a commercial plane's comms and then fly it "below the radar" for any period of time? We hear about it in adventure stories but can it actually be done in the real world? How low would they need to fly and can that be achieved for any length of time by a large commercial airliner?
