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To an aircraft on the ground at an aerodrome, a series of white flashes means…

  • A

    Return to starting point on the aerodrome.

  • B

    Cleared to taxi to the runway holding point.

  • C

    Give way to other aircraft and continue taxiing.

  • D

    Stop immediately and wait for further instructions.

Refer to figure.
ICAO Annex 2
Appendix 1 - 4. SIGNALS FOR AERODROME TRAFFIC

4.1 Light and pyrotechnic signals

From Aerodrome Control to Aircraft on the ground

  • Steady green - Cleared for take-off 
  • Steady red - Stop 
  • Series of green flashes - Cleared to taxi 
  • Series of red flashes - Taxi clear of landing area in use 
  • Series of white flashes - Return to starting point on the aerodrome

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