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 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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Examples of Imaginary surfaces in a sentence

  • Imaginary surfaces and approach/departure paths will provide protected airspace for two ingress/egress routes of not less than an 8:1 ratio.

  • 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.

  • Imaginary surfaces - Those areas established in relation to the airport and to each runway consistent with FAR Part 77 in which any object extending above these imaginary surfaces is, by definition, an obstruction.

  • Imaginary surfaces include the primary surface, approach surfaces, transitional surfaces, the horizontal surface, and the conical surface.

  • 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.

  • Imaginary surfaces, including heights and elevations are shown on the Exhibits at the end of this Ordinance.

  • Principle of interlocking, Modernization of railway and railway tracks, High speed tracks.SECTION- II AIRPORT ENGINEERINGUnit 7: Air transport development: (3)Airport scenario in India-Stages of development, Aircraft characteristics, Airport planning, Site selection, Obstruction and zoning laws, Imaginary surfaces.

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

  • The qualification of the contractor to perform the work involved in the contract.

  • The State Committee for the Reorganization of School Districts, as was indicated, the Commissioner of Education, by statute, is an ex officio, nonvoting member of that committee, which means he can appear and be counted for a quorum but he can't vote on any of the items that are before it.


More Definitions of Imaginary surfaces

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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Related to Imaginary surfaces

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