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According to ICAO Annex 12 air-to-ground signals, if survivors see an aircraft rocking its wings during the hours of…

  • A

    Darkness, this means that ground signals have NOT been understood.

  • B

    Daylight, this means that ground signals have NOT been understood.

  • C

    Darkness, this means that ground signals have been understood.

  • D
    Daylight, this means that ground signals have been understood.

ICAO Annex 12
Appendix. Search And Rescue Signals

3. Air-to-ground signals

3.1 The following signals by aircraft mean that the ground signals have been understood:

a) during the hours of daylight:
— by rocking the aircraft’s wings;
b) during the hours of darkness:
— flashing on and off twice the aircraft’s landing lights or, if not so equipped, by switching on and off twice its navigation lights.

3.2 Lack of the above signal indicates that the ground signal is not understood.

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