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For direction finding, which of the following Q codes can be used?

1. QDM
2. QNH
3. QFE
4. QUJ
5. QTE
6. QDR

  • A

    1, 2, 3

  • B

    1, 4, 5, 6

  • C

    2, 3, 5, 6

  • D

    1, 2, 4, 5

Refer to figure.
As seen in the figure there is a system of abbreviations that indicates what kind of bearing is described. Q codes are used - these are 3 letter codes starting with the letter Q, and are used in radio communications:

  • QDM = Magnetic bearing to the station
  • QDR = Magnetic bearing from the station
  • QUJ = True bearing to the station
  • QTE = True bearing from the station

Note: ICAO officially defines QDM/QDR = magnetic heading (zero wind).

The incorrect answers given are:

QNH is the calculated pressure at MSL in ISA conditions. This means that the altimeter, on the apron of the aerodrome for which it is given, reads the elevation.

QFE is the pressure set on the altimeter so that it indicates the height above the reference elevation being used (height above current ground level). If you set the QFE on your altimeter’s subscale on the ground, the altimeter would read 0 feet.

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