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In aviation and aviation meteorology, a flight level ( FL) is an aircraft's altitude at standard air pressure, expressed in hundreds of feet.
10 mar 2024 · Flight Levels (FL): Here’s the definition of a Flight Level by the ICAO (International Civil Aviation Organization): “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.”.
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.
To avoid mid-air collisions, aircraft fly at predefined altitudes known as flight levels. These flight levels are dependent on the atmospheric pressure and vary according to the weather conditions.
Visual flights (VFR) Flight levels and altitudes for instrument and visual flights.
¶ Flight level and standard pressure. A Flight Level (FL) is the vertical distance of an aircraft above the ISOBARIC SURFACE of 1013.25hPa (hecto Pascal) or 29.92 in Hg (inches of Mercury). An ISOBARIC SURFACE is the invisible landscape that connects all points with the same atmospheric pressure.
22 paź 2017 · From the flight levels, loss of pressurization or supplemental oxygen, or the onset of hypoxic symptoms—as well as a fire or an emergency medical issue—are the primary reasons to perform an emergency descent.
