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An aircraft is allowed to change frequency when so advised by the appropriate aeronautical station. Under which other condition(s) is the aircraft allowed to change frequency?

1. Without prior notification to the aeronautical station, to get necessary information to land at the planned destination on the ATIS frequency
2. After notifying the aeronautical station that a change of frequency is needed
3. In case of distress

  • A

    3 only

  • B

    2 only

  • C

    1and 3

  • D

    1 and 2

This question appears to be trying to ask if a pilot can just select another frequency at will when already working with a controller. The answer is that you may not, but instead should ask the controller if you can switch frequencies.

Use of the distress frequency is somewhat misleading, but there is no answer option for 2 and 3. A distress call would normally be made on the frequency in use.

ICAO Annex 10, Volume II
5.2.2.6 Transfer of VHF communications

5.2.2.6.1 An aircraft shall be advised by the appropriate aeronautical station to transfer from one radio frequency to another in accordance with agreed procedures. In the absence of such advice, the aircraft station shall notify the appropriate aeronautical station before such a transfer takes place.

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