4 ms·
In the US at least I’m not aware of a single certified aircraft that relies on GPS as the primary and only means of navigation. Even brand new Airbus 320/321s a
by bronco21016 8y ago
In the US at least I’m not aware of a single certified aircraft that relies on GPS as the primary and only means of navigation. Even brand new Airbus 320/321s and Boeing 737-700/800/900s have INS installed and is considered primary. GPS and radio based navigation add correction and cross checking to the INS derived position. GPS is necessary for RNP but RNP procedures are not yet widespread enough to cause major disruption to the national airspace system.
As we move closer and closer to primarily an RNP system a GPS outage may become more disruptive but for at least several more decades the infrastructure and equipment to navigate using INS and radio based means such as VORs will provide a proven and safe backup.