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In accordance with ICAO Annex 14, what should a signalling lamp in the aerodrome control tower be capable of?

  • A
    Producing different coloured lights and warning noises.
  • B
    Producing red, orange, and green signals.
  • C

    Being aimed automatically at any target.

  • D
    Producing red, green, and white signals.

ICAO Annex 14
Chapter 5. Visual Aids for Navigation
5.1.3 Signalling lamp
Characteristics
5.1.3.2 Recommendation.- A signalling lamp should be capable of producing red, green and white signals, and of:

a) being aimed manually at any target as required;
b) giving a signal in any one colour followed by a signal in either of the two other colours; and
c) transmitting a message in any one of the three colours by Morse Code up to a speed of at least four words per minute.

When selecting the green light, use should be made of the restricted boundary of green as specified in Appendix 1, 2.1.2.

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