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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: Upon the return of the machine to its base, the report must be
prepared without delay. The picture recorded by the eye has to
be set down clearly and intelligibly with the utmost speed. The
requisite indications must be made accurately upon the map.
Nothing of importance must be omitted: the most trivial detail is
often of vital importance.
A facile pencil is of inestimable value in such operations.
While aloft the observer does not trust to his memory or his eye
picture, but commits the essential factors to paper in the form
of a code, or what may perhaps be described more accurately as a
shorthand pictorial interpretation of the things he has
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