VNAV

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VNAV
Vertical NAVigation in aviation is a function of autopilot which directs vertical movement of aircraft either according to pre-programmed FMS flight plan during cruise or according to ILS glideslope during approach.VNAV in the sense that the FMS directs altitude according to a flight plan was first introduced on B757 and B767 in 1982, while Autoland (using ILS guidance) has been available since mid-20th century.
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FAA Glossary of Airport AcronymsDownload this dictionary
VNAV
Visual Navigational Aids
  

Source: U.S. Department of Transportation, Federal Aviation Administration (FAA).

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