Imaginary surfaces definition

Imaginary surfaces means the imaginary airspace designated by the Federal Aviation Administration and as defined in 14 C.F.R. Part 77 for the protection of the imaginary surfaces for the airport.
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Imaginary surfaces are defined by means of elevations, heights and slopes in relation to individual heliports, the spaces above which are reserved to air navigation. In addition to the "imaginary surfaces", the Commission will use all of the FAR Part
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Imaginary surfaces means surfaces established in relation to the end of each runway or designated takeoff and landing area, as defined in paragraphs 77.25, 77.28 and 77.29 of the Federal Aviation Regulations (FAR) Part 77. Such surfaces include imaginary approach, horizontal, conical, transitional, primary and other surfaces. These surfaces are specifically described for each airport in the airport comprehensive land use plan and shall be calculated based upon the established airport elevation. The established elevation of an airport shall be the highest point of the usable land area.
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Examples of Imaginary surfaces in a sentence

  • Airport Imaginary Surfaces: Imaginary surfaces established at an airport for obstruction determination purposes and consisting of primary, approach-departure, horizontal, vertical, conical, and transitional surfaces.

  • Inner Core: No Maximum; Outer Core: 125 feet, unless a lower height restriction shall be required based on Federal Aviation Regulations Part 77 – Imaginary surfaces.

  • Refer to AC 150/5300-13, Airport Design, for information on FAA airport geometric design standards. Imaginary surfaces and airspace.

  • Imaginary surfaces include the following and are depicted in Figure 6.3:8• Primary Surface: This surface is longitudinally centered on the runway.

  • Imaginary surfaces are defined that extend out from the runway at locations where aircraft are likely to fly.

  • Imaginary surfaces are defined by the primary surface, runway protection zone, approach surface, horizontal surface, conical surface and transitional surface.

  • Imaginary surfaces in the airspace surrounding the Airport defined in accordance with criteria set forth in Federal Aviation Regulations (FAR) Part 77.1 These surfaces establish the maximum height that objects on the ground can reach without potentially creating constraints or hazards to the use of the airspace by air- craft approaching, departing, or maneuvering in the vicinity of the Airport.

  • Imaginary surfaces are designed to allow aircraft to safely operate within the airport’s traffic pattern and along established approach and departure areas into and out of the airport.

  • Cape Town: Oxford University Press: 2002: 44 Green J, Thorogood N, editors.

  • Zoning laws; Classification of obstructions; Imaginary surfaces; Approach zone; Turning zone.


More Definitions of Imaginary surfaces

Imaginary surfaces are defined by means of elevations, heights, and slopes in relation to individual airports, the spaces above which are reserved to air navigation. In addition to the “imaginary surfaces”, the Commission will use all of the FAR Part 77.23 standards along with the results of FAA aeronautical studies, or other studies deemed necessary by the Commission, in order to determine if a structure is an “obstruction.” Building or structural heights are limited to the distance between the ground elevation of the site and an elevation that has been determined will not adversely effect an airport or aeronautical operations, nor navigational-aid siting criteria, including interference with navigational-aids or published flight paths and procedures.
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Related to Imaginary surfaces

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