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An aircraft is expected to land at 22:30 UTC. The airport has little traffic. When must ground lights be brought into operation?
  • A
    21:00 - 23:00 UTC
  • B
    21:30 UTC at the latest
  • C
    20:30 UTC at the latest
  • D
    20:00 - 23:30 UTC

ICAO Doc 4444
7.15 AERONAUTICAL GROUND LIGHTS

7.15.2.2 Lights on and in the vicinity of aerodromes that are not intended for en-route navigation purposes may be turned off, subject to further provisions hereafter, if no likelihood of either regular or emergency operation exists, provided that they can be again brought into operation at least one hour before the expected arrival of an aircraft.

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