air traffic control

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Related to Aviation control: flight control, Flight control surfaces

air traffic control,

the system by which airplanes are safely routed into and out of major airports. Air traffic control in the United States is centered in a number of regional control centers that route airplanes along established airways to airport traffic control centers. There Instrument Landing Systems and Microwave Landing Systems enable planes to land safely in almost any weather conditions. Air traffic controllers, who are responsible for maintaining safe distances between planes, are employees of the U.S. Dept. of Transportation. Air traffic control is made possible by special transponders installed in every commercial and many private aircraft, which automatically transmit information on a plane's altitude and speed to the ground controller. The distortion that often affects voice transmissions can be eliminated by the use of cockpit datalinks; collision avoidance systems provide further safety margins. Knowing the course, speed, and altitude of every plane in the sector, the controller can contact each in turn to give landing or course instructions. Modern air traffic control has contributed to making air travel far safer than highway travel, and on a passenger-mile basis safer even than rail travel.

air traffic control (ATC)

A service provided by the appropriate authority to promote the safe, orderly, and expeditious flow of traffic.
References in periodicals archive ?
Only about 30 percent of the normal number of flights will operate in Europe on Monday because of the spread of volcanic ash from Iceland, the European aviation control agency Eurocontrol said.
Under the three-year contract, Hill will manage the construction of senior and junior bachelors quarters for over 250 residents, a warehouse complex consist- ing of 15 separate buildings, an aviation control building and ive schools.
Later on the day, the passengers learned that the pilot of Sun-Air Boeing 737 was instructed by the aviation control to delay landing for 10 minutes in order to allow another aircraft to take off on the same runway.
public schools), power generating stations, structures containing highly toxic material as defined by the IBC, national defense structures, wastewater treatment facilities, aviation control towers and air traffic control centers.
military return aviation control authority of airspace over and around Yokota base to Japan.
The fly-over went ahead despite criticism by the Polish museum located at the site and a claim by a Polish aviation control spokeswoman that poor weather had led to the cancellation of the tribute.
Any airplane flying over or near Japan will be required to pay 89,000 yen for use of aviation control information, the ministry said.
Worth, TX), will include the following: a Block 50 F-16C/D-style cockpit; color, multifunction displays, provided by Honeywell Space and Aviation Control (Phoenix, AZ); a modular mission computer from Raytheon Systems Co.
These test sets are to be installed as part of an ongoing initiative to upgrade the communications test technology used in the commercial and military aviation control networks.
He also announced the construction of five control towers and a centre of aviation control in Tamanrasset.
ET after a meeting of the European aviation control agency Eurocontrol, which said on Monday it expected between 8,000 and 9,000 flights to operate in Europe.
Summary: Brussels, April 19, 2010, SPA -- Only about 30 percent of the normal number of flights will operate in Europe on Monday because of the spread of volcanic ash from Iceland, the European aviation control agency Eurocontrol said.

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