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 ?
The Wickes store in Huddersfield is selling house coal, although it is illegal to use in smoke control areas. Inset: Clr Andrew Cooper
No avian flu cases have been monitored in Minalin and Candaba, located outside the 7-km control area.
Nevertheless, by the end of the study, the number of rodent holes in control area (Vartoon) showed 6.66 fold increase.
It was found that over the period of study smoking has increase in affected area (except in severe area) and in control area and these findings are in agreement with that of population based Cancer Registry.
([dagger]) Effect of intervention: (B/A)-(D/C) Where A = baseline value for VL-affected HH per 1,000 HH/VL incidence per 10,000 persons in the intervention area; B = post-intervention value for VL-affected HH per 1,000 HH/VL incidence per 10,000 persons in the intervention area; C = baseline value for VL-affected HH per 1,000 HH/VL incidence per 10,000 persons in the control area; D = post-intervention value for VL-affected HH per 1,000 HHs/VL incidence per 10,000 persons in the control area.
Third group was treated by control area pollens extract plus Alum and forth group was treated by polluted area pollens extract plus Alum.
A duct hose that had been exposed to radioactivity was taken out of radiation control areas without permission Wednesday at Kansai Electric Power Co.'s Oi nuclear power plant in Fukui Prefecture, the country's No.
The money raised from selling these homes will help to subsidize the acquisition and rehabilitation of the 300 homes in the Asset Control Area. The Asset Control Areas include Bedford Stuyvesant, East New York, Bushwick and Cypress Hills, Brooklyn, Jamaica, Queens and the North West Bronx.
Because of the unforeseen nature of the event, the study was necessarily designed as a hybrid cross-sectional and retrospective cohort study of residents in an exposed area and a control area and was approved by institutional review boards of the New York State Department of Health and New York University.
base in western Tokyo enjoys a bigger air control area than Tokyo's Haneda airport, causing civilian aircraft to fly in a ''very narrow and limited air space.''
This study also hypothesized that the proportion of children with blood lead levels above the level of concern established by the Centers for Disease Control and Prevention (CDC) - greater than or equal to 10 [[micro]gram]/dl - would be significantly greater in the study area than in the control area.
CANbus consists of multiple microprocessors distributed in a "control area network" and built around a "bus" architecture in which several computer components share a digital communications pathway.

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