What official government document should a pilot check to determine what magnetic north a VOR was set to when it was commissioned?
What is magnetic variation under RADIO AIDS TO NAVIGATION in FAA Chart Supplement, and How to use it?
Why are the VHF and UHF airbands directly adjacent to frequency bands used by vital radionavigation aids?
What are the units for the bearing to center of an airport from radio aids to navigation in chart supplement?
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