Projects:EASA PPL/Units & General: Difference between revisions

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{| class="wikitable" summary="Most common Q codes used in aviation for altimeter settings, including meaning and sample use"
{| class="wikitable" summary="Most common Q codes used in aviation for altimeter settings, including meaning and sample use"
|+ Altimeter settings
|+ Altimeter settings
! Code !! Meaning !! Sample use
! Code !! Meaning  
|-
|-
| 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
| 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.  
|-
|-
| QFE || Atmospheric pressure measured at the airport station. <br> When set, the altimeter reads the height above the station. Not  in common use. || Runway in use 22 Left, QFE 990 millibars
| QFE || Atmospheric pressure measured at the airport station. <br> When set, the altimeter reads the height above the station. Not  in common use.  
|-
|-
| 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. ||
| 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.  
|-
|-
| (QFF) || Atmospheric pressure at a place, reduced to MSL using the actual temperature at the time of observation as the mean temperature. ||
| (QFF) || Atmospheric pressure at a place, reduced to MSL using the actual temperature at the time of observation as the mean temperature.  


|}
|}
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{| class="wikitable" summary="Most common Q codes used in aviation for radio navigation, including meaning and sample use"
{| class="wikitable" summary="Most common Q codes used in aviation for radio navigation, including meaning and sample use"
|+ Radio Navigation
|+ Radio Navigation
! Code !! Meaning !! Sample use
! Code !! Meaning  
|-
|-
| QDM || Magnetic bearing ''to'' a station || (callsign) request QDM (callsign)<ref name="caa.co.uk">[http://www.caa.co.uk/docs/33/CAP%20413%20Radiotelephony%20Manual%2021%202%20complete.pdf 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</ref>
| QDM || Magnetic bearing ''to'' a station  
|-
|-
| QDL || Series of bearings taken at regular intervals ||
| QDL || Series of bearings taken at regular intervals  
|-
|-
| QDR || Magnetic bearing ''from'' a station || (callsign) request QDR (callsign)<ref name="caa.co.uk"/>
| QDR || Magnetic bearing ''from'' a station  
|-
|-
| QFU || Magnetic bearing of the runway in use || Runway 22 in use, QFU 220<ref>[http://acronyms.thefreedictionary.com/QFU QFU on The Free Dictionary]</ref>
| QFU || Magnetic bearing of the runway in use  
|-
|-
| QGE || Distance ||
| QGE || Distance  
|-
|-
| QGH || Controlled Descent through Clouds ([[Royal Air Force]] use) ||
| QGH || Controlled Descent through Clouds ([[Royal Air Force]] use)  
|-
|-
| QTE || True bearing/track ''from'' a station || (callsign) request QTE (callsign)<ref name="caa.co.uk"/>
| QTE || True bearing/track ''from'' a station  
|-
|-
| QTF || Position in relation to a point of reference or in [[latitude]] and [[longitude]] ||
| QTF || Position in relation to a point of reference or in [[latitude]] and [[longitude]]  
|-
|-
| QUJ || True bearing/track ''to'' a station ||
| QUJ || True bearing/track ''to'' a station  
|}
|}


Revision as of 09:34, 18 January 2023

Distances

  • 1 NM = 1,852 km
  • 1 NM = 6080 ft
  • 1 m = 3,28 ft
  • 1 statute mile = 1,609 km

Weight

  • 1 kg = 2.205 pounds

Volume

  • 1 US-Gal = 3.785 L
  • 1 Imp-Gal = 4.546 L

Pressure

  • Standard Pressure = 1013.25 hPa
  • 1hPa = 27ft

Sphere

  • Big circle: 1° = 60NM

Speed

  • ICE-T
    • Indicated Airspeed
      • ↓ correct for instrument error
    • Calibrated Airspeed
      • ↓ correct for compressibility (negligible below 200kts and 10.000ft )
    • Equivalent Airspeed
      • ↓ correct for altitude and non-ISA temperature (~ +2% for each 1000ft
    • True Airspeed

Altitude

  • Indicated Altitude (set to QNH)
  • Pressure Altitude (set to 1013.25)
  • Density Altitude (corrected for temperature)
  • True Altitude

Q-Codes

Altimeter settings
Code Meaning
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.
QFE Atmospheric pressure measured at the airport station.
When set, the altimeter reads the height above the station. Not in common use.
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.
(QFF) Atmospheric pressure at a place, reduced to MSL using the actual temperature at the time of observation as the mean temperature.
Radio Navigation
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 (Royal Air Force use)
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

Angles

GAGA
HHAG
SCTA


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