An aerodrome utilizes a signal square. What is its role?
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A
It is an illuminated area on which search and rescue and fire fighting vehicles are placed.
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B
It is a specially marked area to pick up or drop towing objects.
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C
Aircraft taxi to this square to get light signals for taxi and take-off clearance.
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D
It contains special symbols to indicate the conditions at the aerodrome visually to over-flying aircraft.
Refer to figure.
ICAO Annex 14 - Aerodromes
ATTACHMENT A
17. Signal area
A signal area need be provided only when it is intended to use visual ground signals to communicate with aircraft in flight. Such signals may be needed when the aerodrome does not have an aerodrome control tower or an aerodrome flight information service unit, or when the aerodrome is used by aeroplanes not equipped with radio. Visual ground signals may also be useful in the case of failure of two-way radio communication with aircraft. It should be recognized, however, that the type of information which may be conveyed by visual ground signals should normally be available in AIPs or NOTAM. The potential need for visual ground signals should therefore be evaluated before deciding to provide a signal area.
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