Re: Time
Inertial nav is good for an 11 hour flight. So no need for sextants unless really long-haul.
Plus it's only the ADS-B transmission of the plane's GPS position that's up-the-creek. There's no suggestion that the GPS display in the cockpit is wrong so the pilot still knows where he is - it's just ATC that doesn't. ;-)
Biting the hand that feeds IT
