QNH
Altimeter pressure datum to show vertical distance above local mean sea level
RIS ...
QNH: The pressure 'reduced' to mean sea level, assuming ISA temperature profile from the station/airfield to MSL. An altimeter set to the airfield QNH reads the elevation of the airfield when on the ground.
pressure systems ...
QNH- The barometric pressure as reported by a particular station.
QUADRANT- A quarter part of a circle, centered on a NAVAID, oriented clockwise from magnetic north as follows: NE quadrant 000-089, SE quadrant 090-179, SW quadrant 180-269, ...
QNH
(Q-Code) for Air Pressure in hPa calculated to MSL
QUAMGO
Quasi-Monopoly Government Organization ...
QNH set on its altimeter. Above transition altitude QNE is set and flight levels used.
Also transition level (TL) at which a descending aircraft changes from FL to QNH.
QNH 995 hectopascal.
No significant change
No significant change in weather expected.
QNH: altimeter setting to indicate height amsl.
RCC: Rescue Co-ordination Centre.
RPM: revolutions per minute.
QNH Setting on the subscale of the altimeter so that the instrument shows elevation or altitude above sea level
QTE True great circle bearing to an aircraft from a station
R/T Radio Telephony ...
Temperature and QNH
Has a direct effect on air density and thus climb performance. At any altitude where OAT is higher than standard ISA temperature climb performance will be reduced.
Altimeter setting: barometric pressure reading in millibars (for example: 1015), or inches of mercury (for example: 29.80) used to set a pressure altimeter's sub-scale to QFE or QNH.
APP: Approach control
APU: Auxiliary Power Unit.
 See also: Aircraft, Altitude, Altimeter, Aviation, Flight
  
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