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Flight levels are usually designated in writing as FLxxx, where xxx is a two- or three-digit number indicating the pressure altitude in units of 100 feet (30 m). In radio communications, FL290 would be pronounced as "flight level two nine (r) zero".
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25 sty 2024 · Updated: March 11, 2024. How do aircraft measure altitude? What are flight levels and how are they used? Why do we need them? Pilots and air traffic controllers rely on standardized systems to ensure the safe and efficient management of air traffic.
The flight levels correspond to the altitude in 100-ft increments (hectofeet) above the pressure surface of 1,013.25 hPa calculated according to the standard atmosphere. For example, FL050 is the pressure surface 5,000 ft above the pressure surface 1,013.25 hPa.
Introduction. There are several ways to indicate the vertical position of aircraft and/or obstacles. Each of them has a different meaning and is used in a particular situation: - height. - altitude. - flight level. Units for vertical position. In general, vertical positions are expressed in FEET (ft).
Definition. Flight levels [3] are described by a number, which is the nominal altitude, or pressure altitude, in hundreds of feet, while being a multiple of 500 ft, therefore always ending in 0 or 5. Therefore, a pressure altitude of is referred to as "flight level 320".
Definitions. Altitude. The vertical distance of an object measured from mean sea level. Flight Level (FL) A surface of constant atmosphere pressure which is related to a specific pressure datum, 1013.2hPa, and is separated from other such surfaces by specific pressure intervals.
