Civil airport imaginary surfaces.

CFR · 2024-01-01 · US · Title 14

The following civil airport imaginary surfaces are established with relation to the airport and to each runway. The size of each such imaginary surface is based on the category of each runway according to the type of approach available or planned for that runway. The slope and dimensions of the approach surface applied to each end of a runway are determined by the most precise approach procedure existing or planned for that runway end. (a) (1) 5,000 feet for all runways designated as utility or visual; (2) 10,000 feet for all other runways. The radius of the arc specified for each end of a runway will have the same arithmetical value. That value will be the highest determined for either end of the runway. When a 5,000-foot arc is encompassed by tangents connecting two adjacent 10,000-foot arcs, the 5,000-foot arc shall be disregarded on the construction of the perimeter of the horizontal surface. (b) (c) (1) 250 feet for utility runways having only visual approaches. (2) 500 feet for utility runways having non-precision instrument approaches. (3) For other than utility runways, the width is: (i) 500 feet for visual runways having only visual approaches. (ii) 500 feet for non-precision instrument runways having visibility minimums greater than three-fourths statute mile. (iii) 1,000 feet for a non-precision instrument runway having a non-precision instrument approach with visibility minimums as low as three-fourths of a statute mile, and for precision instrument runways. (iv)

official document · source cfr-2024 · id 14:§ 77.19