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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).
Introduction: An altimeter is a type of barometer which measures the vertical distance to the surface, necessary for a pilot to maintain the desired or assigned altitude during flight. Maintaining a current altimeter setting is critical because the atmosphere pressure is never constant.
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.
GAMET is an area forecast for low level flights (below FL 100) in abbreviated plain landguage.
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.
Most operators now require that the main ATC frequency is monitored when airborne without simultaneous se-lection of other radio or intercom channels so that such monitoring is efective (although an exception may be made for monitoring of 121.5).
Pressure altitude divided by 100 is referred to as the flight level. It is used above the transition altitude (18,000 feet (5,500 m) in the US, but may be as low as 3,000 feet (910 m) in other jurisdictions if they do not have higher mountains).
