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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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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.
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). This is based on the principle of something called the International Standard Atmosphere.
The Flight Level is written using the two letters FL with the altitude (at standard QNH) in feet, without the two digits at the end: 10000 feet becomes Flight Level 100 = FL100; 6500 feet becomes Flight Level 65 = FL65; Commonly, the standard altimeter setting is used worldwide at or above the transition level (TL). ¶ Isobaric surface curve
30 paź 2020 · In the EU specifically, EU regulation 2016/1185 applies, which states that, generally speaking, each digit should be spoken separately, but with some exceptions: Flight levels shall be transmitted by pronouncing each digit separately except for the case of flight levels in whole hundreds.
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. Altitude above sea-level in 100 feet units measured according to a standard atmosphere.
