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Altitude: Difference between revisions
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Altitude in terms of the air pressure. | Altitude in terms of the air pressure. | ||
===Flight level=== | ===Flight level=== | ||
Pressure altitude divided by 100 feet is referred to as the flight level, and is used above the transition altitude (18,000 feet (5,500 m) in the US, but may be as low as 3,000 feet (910 m) in other jurisdictions); so when the altimeter reads 18,000 ft on the standard pressure setting the aircraft is said to be at "Flight level 180" or FL180. | [[#Pressure altitude]] divided by 100 feet is referred to as the flight level, and is used above the transition altitude (18,000 feet (5,500 m) in the US, but may be as low as 3,000 feet (910 m) in other jurisdictions); so when the altimeter reads 18,000 ft on the standard pressure setting the aircraft is said to be at "Flight level 180" or FL180. | ||
*Flight level gives the same result for every aircraft independent from the departing airfield of the aircraft. | *Flight level gives the same result for every aircraft independent from the departing airfield of the aircraft. | ||
*When flying at a Flight Level, the altimeter | *When flying at a Flight Level, the altimeter must be set to standard pressure = 29.92" Hg = 1013.25 mbar. | ||
==Density altitude== | ==Density altitude== | ||