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The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from Aeroplanes and Dirigibles of War by Frederick A. Talbot: discovery, and promptly drops his guiding signal directly over
the point from which he has drawn fire.
Operations at night are conducted by means of coloured lights or
an electrical searchlight system. In the former instance three
lights are generally carried--white, red, and green--each of
which has a distinctive meaning. If reliance is placed upon the
electric light signalling lamp, then communications are in code.
But night operations are somewhat difficult and extremely
dangerous, except when the elements are propitious. There is the
ground mist which blots everything from sight, rendering
reconnaissance purely speculative. But on a clear night the
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