My understanding of this is very weak but from what I have read there are four sources of navigation information that George might use to hold a course. They are Inertial, magnetic, radio and GPS. It seems that aircraft comms were impaired and the information we have consists of some satellite pings. With no comms, what information is still available to the auto pilot to maintain course?
Can anyone shed some light on the possibilities? My reason for asking about the rhumb lines is that even if all other systems are switched off, a magnetic compass might still provide a heading.