control area


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control area

[kən′trōl ‚er·ē·ə]
(navigation)
An area over which air-traffic control is exercised by a ground-located traffic-control center.

control area

A building (or portion thereof) in which exempted quantities of hazardous materials may be dispensed, handled, stored, or used.

control area

control areaclick for a larger image
A controlled airspace extending upward from a specified limit above the earth (ICAO). The delineation of the control areas, including airways and terminal control areas, should encompass sufficient airspace to contain the flight paths of those IFR (instrument flight rules) flights to which it is desired to provide air traffic control services deemed appropriate after taking into account the capabilities of the available navigational aids in the area. In a control area, other than that formed by a system of airways, a system of routes may be established for easy provision of air traffic control. While it is not essential to establish a uniform lower limit of control areas, it should be not less than 700 ft (200 m) above the ground or water. This limit should be such, when practical, that it provides separation for VFR (visual flight rules) flights below the control area. When this lower limit is above 3000 ft (900 m) MSL (mean sea level), it should coincide with a VFR (visual flying rules) cruising level. An upper limit of a control area is established when either the air traffic control service is not planned to be provided above this upper limit; or the control area is situated below an upper control area. In this case, the upper limit should coincide with the lower limit of the upper control area; it should coincide with a VFR cruising level.
References in periodicals archive ?
Participants with a current or > 5 pack-year history of cigarette use, who lived in the control area but worked in the exposed area, who returned to the residence after January 2002, or who refused to be recontacted were also excluded.
Fox fecal samples were collected at least once per month in bait and control areas and their immediate vicinity during the following periods: winter 1999/2000 (November 1999 to February 2000), spring 2000 (April to June 2000), summer/autumn 2000 (July to October 2000), winter 2000/01 (November 2000 to February 2001), and summer/autumn 2001 (July to October 2001).
All 26 tested homes in the control area were randomly selected using a table of random numbers from homes in which a child resided.
Almost all parts of Kirklees and Calderdale are designated Smoke Control Areas - making it illegal to emit smoke from a building if the smoke is caused by the burning of unauthorised fuels such as wood or coal.
PJM is the largest electrical control area in North America, providing reliable electricity to customers in all or parts of five states and the District of Columbia.
During the growing cycle, test area used 25 percent less water than the control area.
PMSA has consistently supported global solutions to address air pollution and emissions problems including its lead advocacy role in securing ratification of the MARPOL Annex VI treaty which includes the establishment of an enforceable Sulfur Emission Control Area (SECA) across all North America.
Adjustable thumb control area has 2-way tilt mechanism, slides forwards and backwards, pivots up and down
In a separate matter, the Federal Energy Regulatory Commission reaffirmed PNM's market-based rate authority in the utility's control area.
Other Northwest control area operators responsible for the secure and reliable operation of their interconnected systems are welcome to join.
They expect to have broad participation, including the involvement of other transmission owners and control area operators, in a joint effort to form a new organization.
If FERC revokes PPLM's market-based rate authority, PPLM will be permitted to sell wholesale power within the NOR control area only at cost-based rates established by FERC.

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