RNAV Approaches Simplified: A Guide for New Pilots
Pilot Institute
FEBRUARY 15, 2025
Before RNAV, pilots had to rely on radios (NAVAIDs) and antennas on the ground such as VORs (Very High-Frequency Omnidirectional Range) and NDBs (Non-Directional Beacons). But these systems had some problems, like not being able to work over water, or if there was something in the way of the transmitter and the aircrafts receiver.
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