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MSL
- Usado para
- mean sea level
- Definição1
- The datum used as a reference for measuring elevations throughout the United States. It is the average height of the surface of the sea for all stages of tide. When the letters MSL are used with an altitude, it means that the altitude measured form mean, or average, sea level.
- Fonte1
- CRANE, Dale (ed.). Dictionary of aeronautical terms. 4th ed. Newcastle: ASA, 2006.
- Definição2
- The standard earth surface elevation to which the ISA (international standard atmosphere) is referred.
- Fonte2
- INTERNATIONAL CIVIL AVIATION ORGANIZATION. Recommended method for computing noise contours around airports. Montreal, 2008. (Doc. 9911).
- Fonte3
- FAA FLIGHT SAFETY BRIEFING. Washington, DC: FAA, mai.-jun. 2015.
- Fonte4
- GRÃ-BRETANHA. Meteorological Office. The meteorological glossary. 2nd ed. London: H. M. Stationery Office, 1930.
- Contexto
- For example, at a cold-climate airport in the summer, ATC might vector you to the final approach course for an instrument approach at 1,500 feet mean sea level (MSL), whereas in the winter, they will most likely vector you to the final approach course at 2,000 feet MSL.
- The International Standard Atmosphere which is used as the basis of graduation of altimeters assumes at mean sea level a temperature of 15°C., a pressure of 1,013-2 mb., and a lapse rate of 6-5°C. per kilometre from sea level up to 11 Km., above which the temperature is assumed constant at - 56-5°C.
- Subárea1
- Aeronautical Cartography
- Related Term
- AMSL
- Português
- nível médio do mar