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Definitions. Altitude. The vertical distance of an object measured from mean sea level. 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.
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.
In aviation and aviation meteorology, a flight level ( FL) is an aircraft's altitude at standard air pressure, expressed in hundreds of feet.
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.
6 paź 2023 · Definition of Geometric Altitude: Geometric altitude is a computed aircraft altitude used by onboard EGPWS Terrain Awareness and Display systems. Geometric Altitude Formula: Geometric altitude calculations are done by the computer using GPS altitude with vertical figure of merit (VFOM) and RAIM failure indication, standard altitude, and radio ...
28 gru 2023 · When you set your altimeter to 29.92, you're flying at standard pressure altitude. This is the altitude of the aircraft above the standard datum plane, the theoretical location where at 15 degrees Celsius the altimeter setting will equal 29.92 inches of mercury.
Understand how an altimeter works and how to read one. Appreciate the principles associated with altitude measurement. Know the differences between pressure altitude and density altitude. Be able to calculate density altitude from values of temperature and pressure altitude. What is an Altimeter?
