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Pages 4-5

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From page 4...
... 5STATEMENT OF PROBLEM Annual aircraft operations estimates are used in aviation system planning, airport master planning, environmental studies, aviation forecasts, and to determine funding and design criteria for the nation's airports. At airports with air traffic control towers, aircraft operations are tracked and recorded by the air traffic controller; however, most airports in the United States do not have air traffic control towers (1)
From page 5...
... 6DEFINITION OF TERMS • Advisory circular (AC) -- advisory circulars are published by the FAA to inform the public in a systematic way of nonregulatory material.

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