The following words and phrases shall be used to interpret Part 19 and Part 20 of this chapter, as it specifically applies to Airport and Heliport Zones; otherwise, the general definitions given in § 600-2202 shall apply:
APPROACH SURFACE — A surface longitudinally centered on the runway center line, extending outward and upward from the end of the primary surface and at the same slope as the approach zone height limitation slope as the perimeter of the approach surface shall coincide with the perimeter of the approach zone.
APPROACH ZONE — That area of land and air in and about approach surface.
CONICAL SURFACE — The surface extending outward and upward from the periphery of the horizontal surface at a slope of 20 to one for a horizontal distance of 4,000 feet.
CONICAL ZONE — That area located at 150 feet above the airport elevation at the intersection with the horizontal zone and extending thereafter 20 feet horizontal for each. The conical zone extends outward from the periphery of the horizontal zone a horizontal distance of 4,000 feet.
HAZARD TO AIR NAVIGATION — A building, structure, part thereof or obstruction determined to have a substantial adverse effect on the safe and efficient use of the navigable airspace.
HORIZONTAL SURFACE — A horizontal plane 150 feet above the established airport elevation, the perimeter of which coincides with the perimeter of the horizontal zone.
HORIZONTAL ZONE — The area of 150 feet above the airport elevation established by swinging arcs of 5,000 feet radii for all runways designated utility or, visual and 10,000 feet radii for all other runways from the center of each end of the primary surface of each runway and connecting the adjacent arcs by drawing lines tangent to those arcs. This zone specifically does not include the approach and transitional zones.
LARGER THAN UTILITY RUNWAY — A runway that is constructed for and intended to be used by propeller-driven aircraft of greater than 12,500 pounds gross weight and by jet-powered aircraft.
NON-PRECISION INSTRUMENT APPROACH — An approach and landing of an aircraft using air navigation facilities with only horizontal guidance or area type navigation equipment.
NON-PRECISION INSTRUMENT RUNWAY — A runway used by aircraft utilizing a non- precision instrument approach.
OBSTRUCTION — Any structure, growth or object, whether or not fixed to the ground, which exceeds the maximum height prescribed by the regulations of a particular zoning district.
PRECISION INSTRUMENT APPROACH — An approach and landing of an aircraft using an Instrument Landing System (ILS) or Precision Approach Radar (PAR).
PRECISION INSTRUMENT RUNWAY — Runway which requires or will require the use of an Instrument Landing System (ILS) or Precision Approach Radar (PAR).
PRIMARY SURFACE — Especially prepared hard surface longitudinally centered on a runway extending 200 feet beyond the end of the runway, having a width of and an elevation equal to the elevation of the runway center line.
RUNWAY — A defined area designed and used for the taking off and landing of aircraft.
TRANSITIONAL SURFACE — A surface extending outward at a ninety-degree angle to the runway center line with the runway center line extended at a slope of seven feet horizontal for each foot vertical from the sides of the primary and approach surfaces to where they intersect the horizontal and conical surfaces. With respect to precision approach surfaces, transition surfaces project through (and beyond) the limits of the conical surface, extending a distance of 5,000 feet measured horizontally from the edge of the approach surface and at ninety-degree angles to the extended runway center line.
TRANSITIONAL ZONE — A zone consisting of the areas beneath the transitional surfaces. This zone begins at the sides of and at the same elevation as the primary surface and approach surface extending seven feet horizontal for each foot vertical and extending to a height of 100 feet above the airport elevation and extending to the intersection with the conical surface.
UTILITY RUNWAY — A runway designed and used by propeller-driven aircraft of 12,500 pounds gross weight or less.
VISUAL RUNWAY — A runway designed and used by aircraft using visual approach procedures.