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 ?
Any airplane flying over or near Japan will be required to pay 89,000 yen for use of aviation control information, the ministry said.
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.
Of the 28,000 flights that usually travel through European airspace on an average day, European aviation control agency Eurocontrol said it expected only 11,000 to operate on Friday while only about a third of trans-atlantic flights were arriving.
Under the three-year contract, Hill will manage the construction of senior and junior bachelors quarters for over 250 residents, a warehouse complex consisting of 15 separate buildings, an aviation control building and five schools.
We did not know what went wrong between the pilot and civil aviation authorities at the airport until later on Saturday that we were able to learn 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 take off on the same runway.
His management, leadership and sales and marketing expertise also extend to companies such as Honeywell Space and Aviation Control Ltd.
6 Million of Test Equipment to be Used to Upgrade the Nation's Aviation Control Networks
Japan has announced the aid as it is in efforts to gain support for itself in its dispute with China over some islands and aviation control.
6 million, three-year contract by the Federal Aviation Administration (FAA) to supply a custom featured version of the Company's Halcyon Universal Data Test Set to be installed as part of a multi-year, multi-billion dollar program to upgrade communications technology in the nation's commercial and military aviation control networks.

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