Area navigation using GPS has been around (for us) for about 30 years. Before that we did mostly the same thing using LORAN for a while. But, the National Airspace System was designed around VHF Omni- ...
VOR navigation, while a standard backup, has inherent inaccuracies stemming from station alignment, receiver tolerances, and pilot input errors (e.g., parallax), which can accumulate and result in ...