An precision verification study. Positions referenced on air travel that is important information in a geographic indication of the access routes to the airport and fly up/fly down (Takeoff/Landing) safely with the radio station Radio Doppler VHF Omnidirectional antenna walking Range (DVOR), which is an important factor, especially security, according to the International Civil Aviation Organization. And the various Member countries, Parties emphasized to verify. Aeronautical information quality in a given benchmark (ICAO, 2002a), which confirmed the quality of the country's air transportation provider.
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