| 释义 |
- References
{{short description|Brevity codes used for aviation}}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,[2] as defined by the International Civil Aviation Organisation. First defined in ICAO publication "Doc 6100-COM/504/1" in 1948 and in "ICAO Procedures for Air Navigation Services, Abbreviations and Codes (PAN a S-ABC)" [Doc8400-4] (4th edition 1989), the majority of the Q codes have slipped out of common use; for example today reports such as QAU ("I am about to jettison fuel") and QAZ ("I am flying in a storm") would be voice or computerized transmissions. But several remain part of the standard ICAO radiotelephony phraseology in aviation. | Code | Meaning | Sample use Altimeter settings |
|---|
| QFE | Atmospheric pressure at a specified datum such as airfield runway threshold. When set, the altimeter reads the height above the specified datum. | Runway in use 22 Left, QFE 990 millibars | | QFF | Atmospheric pressure at a place, reduced to MSL using the actual temperature at the time of observation as the mean temperature. | | QNE | Atmospheric pressure at sea level in the International Standard Atmosphere (ISA), equal to 1013.25 mbar or hPa and used as reference for measuring the pressure altitude. When flight levels are used as an indication of altitude, 1013.25 hPa is used as mean sea level (QNH). | | 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. | Request Leeds QNH |
| Code | Meaning | Sample use Radio Navigation |
|---|
| QDM | Magnetic bearing to a station | (callsign) request QDM (callsign)[1] | | QDL | Series of bearings taken at regular intervals | | QDR | Magnetic bearing from a station | (callsign) request QDR (callsign)[1] | | QFU | Magnetic bearing of the runway in use | Runway 22 in use, QFU 220[2] | | QGE | Distance | | QGH | Controlled Descent through Clouds (Royal Air Force use) | | QTE | True bearing from a station | (callsign) request QTE (callsign)[1] | | QTF | Position in relation to a point of reference or in latitude and longitude | | QUJ | True heading to a station |
| Code | Meaning | Sample use Radio Procedures |
|---|
| QGH | controller-interpreted DF let-down procedure, on UHF or VHF[3] |
References1. ^1 2 CAP 413 Radiotelephony Manual 21 2 complete.pdf {{webarchive |url=https://web.archive.org/web/20140508223114/http://www.caa.co.uk/docs/33/CAP%20413%20Radiotelephony%20Manual%2021%202%20complete.pdf |date=May 8, 2014 }}, p.12
2. ^QFU on The Free Dictionary
3. ^QGH on The Free Dictionary
8 : Amateur radio|Encodings|Morse code|Brevity codes|1948 in radio|1948 in aviation|1989 in radio|1989 in aviation |