Search results
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".
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).
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.
The atmospheric variables typically plotted on these isobaric maps include: The height of the pressure surface. The air temperature. The wind speed and direction. When applicable, the dewpoint, an indicator of atmospheric humidity.
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
The minimum number of charts for flights between flight level 250 and flight level 630 shall include a high-level SIGWX chart (flight level 250 to flight level 630) and a forecast 250 hPa wind and temperature chart. Subárea. Air Traffic Control. Spanish. nivel de vuelo.
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.
