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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.
Flight levels use QNE or pressure altitude, while altitude references QNH or local pressure adjusted to sea level pressure. Altitudes are used at low levels and flight levels at higher levels. The transition between altitudes and flight levels differs by country and is generally just above the highest obstacle in that country.
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.
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. e.g. FL250 = 25,000 feet above mean sea level when the pressure at sea ...
Flight Level is a standard altitude measurement system used in aviation. Unlike altitude, which is measured from the ground level, Flight Level is established based on a standard pressure reference, allowing for consistent altitude navigation regardless of atmospheric conditions.
10 mar 2024 · Usually, FLs above 360 are reserved for long-haul flights or intercontinental flights(international). A320, Twin engine narrow body short-haul flight and not the very least wide-body jet engine aircrafts like A380, A350, B747, B777 etc., can fly at even higher altitudes like FL300 to FL460.
Transition Altitude/Flight Level The transition altitude/flight level can be either: • Fixed for the whole country (e.g., FL 180 in the United States); • Fixed for a given airport (as indicated on the approach chart); or, • Variable as a function of QNH (an altimeter setting that causes
