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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). This is based on the principle of something called the International Standard Atmosphere.
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.
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".
27 cze 2023 · One flight level is equivalent to 100 ft, i.e. FL 100 is 10 000 ft and FL 320 is 32 000 ft. Since the pressure lapse rate is approximately 1 hPa per 30 ft, the pressure altitude at an airfield can be easily determined if the QNH is known (see here for further details and a calculator).
13 wrz 2022 · When the pressure increases (in a descent), the capsule expands, moving the pointer anti-clockwise, showing a decrease in altitude. The simple altimeters have indications of altitude in feet. There are three pointers in such an instrument: a 100 ft pointer, a 1,000 ft pointer, and a 10,000 ft pointer.
EXAMPLE: The minimum safe altitude of a route is 19,000' MSL and the altimeter setting is reported between 29.92 and 29.42 inches of mercury, the lowest usable flight level will be 195, which is the flight level equivalent of 19,500 feet MSL (minimum altitude plus 500 feet)
VFR flight requires that you remain in ‘Visual Meteorological Conditions’ at all times. The assumption of VFR flight is that you have enough visibility to control the aircraft by visual references and avoid collisions with terrain and other aircraft. You may only fly under Instrument Flight Rules
