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A pilot receives a QDR of 315° from the VDF ground station.Where is the aircraft located in relation to the ground station?

  • A

    Northwest

  • B

    Northeast

  • C

    Southeast

  • D

    Southwest

Refer to figure.
VDF (VHF Direction Finding) is a method of measuring the direction from which a VHF signal came. It is particularly useful as the transmitting aircraft only needs a standard VHF radio to ask for a VDF bearing from a suitably equipped Air Traffic Services Unit (ATSU). This can give them:

  • QDM - Magnetic bearing from the aircraft to the station.
  • QDR - Magnetic bearing from the station to the aircraft.
  • QUJ - True bearing from the aircraft to the station.
  • QTE - True bearing from the station to the aircraft.

When the pilot receives a QDR of 315° from the VDF ground station, it means that the aircraft is located Northwest in relation to the ground station, i.e. the clockwise angle from the Magnetic North (MN) to the aircraft's position is 315°.

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