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Altitude: Difference between revisions
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==Indicated altitude== | ==Indicated altitude== | ||
The [[altimeter]] reading. The altimeter can be set on '''three''' possible references | The [[altimeter]] reading. The altimeter can be set on '''three''' possible references | ||
#the "barometric pressure adjusted to sea level" ([[#QNH]]) resulting in indicated altitude above [[Mean Sea Level]] for a certain region during current weather conditions | #the "barometric pressure adjusted to sea level" ([[#QNH]]) resulting in indicated altitude above [[Mean Sea Level]] for a certain region during current weather conditions. While on the airfield the altimeter would read the altitude of the airfield. | ||
#height above the airfield | #height above the airfield. While on the runway the indicated altitude would read zero. Near the airfield the indicated altitude would be [[above ground level]]. | ||
#Standard pressure (29.92" Hg or 1013.25 millibars) resulting in the Pressure | #Standard pressure (29.92" Hg or 1013.25 millibars) resulting in the [[#Pressure altitude]]. While on the airfield the altimeter will not display the altitude. It will display the barometric pressure expressed in feet. It provides a standard altitude reading above a certain height. | ||
When to set what depends on the local [[flight rules]]. | When to set what depends on the local [[flight rules]]. | ||