(A) Approach zones for instrument runways. An airport approach zone is established at each end of every airport runway designated for use for instrument landings or take-offs. The zone shall comprise all the land embraced within the following lines:
(1) A line 1,000 feet long running at right angles to the centerline of the runway 500 feet on either side of the centerline at the end of the paved portion of the runway;
(2) A line 4,000 feet long running at right angles to the projected centerline of the runway 2,000 feet on either side thereof at a distance two miles from the first line; and
(3) Two lines making the shortest connections between the ends of the above-described lines.
(B) Other approach zone. An airport approach zone is established at each end of every runway not designated for use for instrument lands or take-offs. The zone shall be 500 feet wide at the end of the runway, and 2,500 feet wide at a distance of two miles from the end of the runway. Otherwise, the limits of the zone shall be measured as in the zone described in division (A) above.
(C) Turning zones. An airport turning zone is hereby established embracing the area between each two airport approach zones. The outer boundary of the zones shall be a series of intersecting arcs completely around the airport, one being swung on a two-mile radius from the midway point of the inner boundary of each airport approach zone. All zones established by this section shall be as indicated on the map attached hereto, and made a part hereof.
(Prior Code, § 13.01)