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25 sty 2024 · A flight level (FL) is a standard pressure altitude, expressed as three numbers. Aircraft flying on flight levels all measure their altitude from the same pressure setting, 1013.2 Hpa (or 29.92 InHg).
Flight levels 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 32,000 ft (9,800 m) is referred to as "flight level 320".
The table below indicates air pressure at elevations below and above sea level. Altitude Above Sea Level Absolute Barometer Absolute Atmospheric Pressure.
6 paź 2023 · Arguably the easiest and most accurate way to calculate pressure altitude is by using a flight computer, such as ASA’s CX3, Sporty’s Electronic E6B, or an equivalent app. Let’s look at how to use each.
Strictly speaking a flight level is an indication of pressure, not of altitude. Only above the transition level (which depends on the local QNH but is typically 4000 feet above sea level) are flight levels used to indicate altitude; below the transition level feet are used.
System of Flight Levels. Flight level zero shall be located at the atmospheric pressure level of 1013.2hPa. Consecutive flight levels shall be separated by a pressure interval corresponding to at least 500ft (152.4M) in the standard atmosphere. Source: ICAO.
In order to separate air traffic and prevent collisions, aircraft in cruise flight fly at common pressure levels known as flight levels (abbreviated to FL). 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.
