Back to the Future (of GPS Backups)
The FAA’s vision for the future of navigation includes some elements from the past. Step aboard Doc’s DeLorean with us for a glimpse of possible GPS backups after VORs.
Visions of the future are the domain of science fiction—imagine a world where some fantastic thing is possible. The FAA presents its own vision in the Performance Based Navigation Roadmap, which is produced about every five years. The third edition is expected around the time you get this. In it the current status of performance-based navigation, PBN, a generalized term for RNAV and RNP (required navigation performance), is analyzed and goals are set for the near, intermediate and long term—each roughly five years apart.