Surf these sites: Aviation Formulary V1.18 -- Introduction to Great Circle navigation theory and the mathematical processes used in navigation. DeLorme -- The Map Store On-line FAA: Notes on High Mountain Flying -- Mountain flying often finds a pilot in flying conditions requiring sharper skills than they may be able to provide. Maptech Digital Mapping Technology - Aero Sectionals -- Maptech: Digital NOAA aero sectionals with viewing and navigation software. Penguin Air Electronic AFD and Planning -- Your source for the electronic Airport Facility Directory, approach plates, the FARs, the AIM and more. The Institute of Navigation -- Non-profit professional society dedicated to the advancement of the art and science of navigation.
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