The Aeronautical Code signals are radio signal codes. They are part of a larger set of Q Codes allocated by the ITU-R. The QAA–QNZ code range includes phrases applicable primarily to the aeronautical service, as defined by the International Civil Aviation Organisation.
| Code |
Meaning |
| QFE |
Atmospheric pressure at a specified datum such as airfield runway threshold. When set, the altimeter reads the height above the specified datum. |
| QFF |
Atmospheric pressure at a place, reduced to MSL using the actual temperature at the time of observation as the mean temperature. |
| QNE |
Indicated altitude at the landing runway threshold when 1013.25 hPa or 29.92 inHg (atmospheric pressure at sea level in the International Standard Atmosphere) is set as altimeter setting. |
| QNH |
Atmospheric pressure at mean sea level (may be either a local, measured pressure or a regional forecast pressure (RPS)). When set on the altimeter it reads altitude. |
| Code |
Meaning |
| QDM |
Magnetic bearing to a station |
| QDL |
Series of bearings taken at regular intervals |
| QDR |
Magnetic bearing from a station |
| QFU |
Magnetic bearing of the runway in use |
| QGE |
Distance |
| QGH |
Controlled Descent through Clouds |
| QTE |
True bearing/track from a station |
| QTF |
Position in relation to a point of reference or in latitude and longitude |
| QUJ |
True bearing/track to a station |
| Code |
Meaning |
| QGH |
controller-interpreted DF let-down procedure, on UHF or VHF |
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