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Es/Altitud: Difference between revisions
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===QNH=== | ===QNH=== | ||
[http://en.wikipedia.org/wiki/QNH QNH] | [http://en.wikipedia.org/wiki/QNH QNH] es un código abreviado de "presión atmosférica a nivel del mar". Es necesario al inicio o al aterrizar una aeronave, cuando es importante tener la [[#Indicated altitude|altitud indicada]] más precisa posible. | ||
El código QNH se utiliza en: | |||
* Los pilotos solicitan la "presión atmosférica a nivel del mar". En su respuesta el [[ATC]] repetirá la palabra QNH seguida de la presión. | |||
* Informes meteorológicos automáticos a través de [[ATIS]]. | |||
Si no hay [[ATIS]] ni [[ATC]] disponible se puede encontrar el valor QNH en el menú Environment => Global Weather. | |||
Si | Si el QNH no está disponible, pero la [[#Elevation|elevación]] del campo de vuelo de partida se conoce, ajusta el [[altimeter|altímetro]] en su lugar. El QNH resultante es el correcto. También es posible utilizar el QNH de un aeródromo cercano. | ||
To use a barometer (i.e. your [[altimeter]]) as a tool to measure the altitude, it must be corrected for weather influences. For this task, every airfield is equipped with an accurate barometer. By combining this value with the [[#True altitude|true altitude]] of the airfield, they can calculate the barometric pressure at [[Mean Sea Level]], the QNH. It will transmit the QNH via [[ATC]] and [[ATIS]] and with that piece of information the altimeter in the aircraft can be corrected for weather influences and will display an altitude close to the [[#True altitude|true altitude]] of the aircraft. This way the [[#Indicated altitude|indicated altitude]] will be quite accurate for a ''certain area around the airfield'' as long as the ''weather remains stable''. While on the airfield the altimeter would show the altitude of the airfield. | To use a barometer (i.e. your [[altimeter]]) as a tool to measure the altitude, it must be corrected for weather influences. For this task, every airfield is equipped with an accurate barometer. By combining this value with the [[#True altitude|true altitude]] of the airfield, they can calculate the barometric pressure at [[Mean Sea Level]], the QNH. It will transmit the QNH via [[ATC]] and [[ATIS]] and with that piece of information the altimeter in the aircraft can be corrected for weather influences and will display an altitude close to the [[#True altitude|true altitude]] of the aircraft. This way the [[#Indicated altitude|indicated altitude]] will be quite accurate for a ''certain area around the airfield'' as long as the ''weather remains stable''. While on the airfield the altimeter would show the altitude of the airfield. | ||