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RNAV Approaches Simplified: A Guide for New Pilots

Pilot Institute

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). Theyre especially useful for airports that dont have the budget or suitable terrain to install an Instrument Landing System (ILS).