vertical speed indicator
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vertical speed indicator
An instrument which displays rate of climb or descent. a. Barometric--An instrument which displays the apparent vertical speed of the aircraft as derived from the rate of change of static pressure. b. Instantaneous--An instrument which displays the vertical speed of the aircraft as derived from a combination of accelerometric and barometric sources.
Dictionary of Military and Associated Terms. US Department of Defense 2005.
References in periodicals archive
As soon as the
vertical speed indicator (VSI) was arrested, the CIC crew called to see if we were OK.
The pilot observed a 100 to 150 feet per minute (FPM) rate of descent on the
vertical speed indicator. He saw red (below glide path) on the SGSI but was not concerned, because he knew that on the alternate approach profile he would see red until reaching one-quarter mile and still be on profile.
Land with the
Vertical Speed Indicator within the green.
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