![]() During landing and take off operations, aircrafts loose or gain altitude at a very slow pace. Zoneis a defined and demarcated area, with cenain commbn qualities. (a) conical surface (b) innerhorizontal surface (c) transitional surface (d) inner transitional surface and balked (iv) Precision approach runway category II, III: (n) Precision approach runways (a) conica! surface (b) inner horizontal surface (c) approach surface (d) transition surface. Precision approach runway category I, II, and III. Horizontal plane 150 m above the threshold elevation, qr the horizontal plane passing through the top of any object that governs an obstaile clearance altitude. The approach surface shall be horizonthl beyond a point at which 2.5% slope intersects. inner horizohtal surface approach surface and transitional surface. Highway, Railway, Airport and Harbour EngineeringĬonica\surface.
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