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A series of green flashes to the aircraft on ground at an aerodrome shall mean…

  • A

    Cleared for take-off.

  • B

    Cleared to taxi.

  • C

    Return to the starting point on the aerodrome.

  • D

    Give way to other aircraft and continue taxiing.

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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