§ 6-5. Horizontal zone.

Latest version.

(a)

A horizontal zone is the area within the perimeter of a horizontal plane that is constructed by swinging arcs of specified radii from the center of each end of the primary surface of each runway of each airport and connecting the adjacent arcs by lines tangent to those arcs. The radius of each arc is ten thousand (10,000) feet for all runways at the airport.

(b)

The radius of the arc specified for each end of a runway will have the same arithmetical value. That value will be the highest composite value determined for either end of the runway. When a five thousand-foot arc is encompassed by tangents connecting two (2) adjacent ten thousand-foot arcs, the five thousand-foot arc shall be disregarded on the construction of the perimeter of the horizontal plane. The horizontal zone does not include the precision and nonprecision approach zones, and the transition zones.

                    
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