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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: The striking of a match may easily betray a position to the alert
eye above.
So far as the British Army is concerned a complete code is in
operation for communicating between aeroplanes and the ground at
night. Very's lights are used for this purpose, it being
possible to distinguish the respective colours at a distance of
six miles and from an altitude of 2,000 feet. The lights are
used both by the aeroplane and the battery of artillery.
The code is varied frequently, but the following conveys a rough
idea of how communication is carried out by this means under
cover of darkness. The aeroplane has located its objective and
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