air traffic control

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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 ?
Even with all that "big sky" up there, the vigilance of both pilots and ATC, Conflict Alert alarms built into ATC radars, and aircraft Traffic Collision and Avoidance Systems, there is still a chance aircraft can get too close to each other.
As far as aircraft traffic at the airport, the number of flights by various airlines in January 2015 has reached 5,729 flights, an increase of 11 percent compared to the same period of 2014.
This week the fire services rush to an emergency landing, operations director Niall Maloney has to deal with an aircraft traffic jam and the long-standing duty free gets a makeover.
The terminal is modular to allow for expansion in phase two to suit the expected future increases in passenger and aircraft traffic, with state-of-the-art facilities affirming Prince Mohammed Bin Abdul Aziz International Airport's (PMIA's) current and future role as a major gateway for scheduled passengers, as well as Hajj and Umrah Pilgrims to the Holy City of Madinah and the greater Kingdom of Saudi Arabia.
CEO of Airport International Group (AIG) -the Jordanian company responsible for the rehabilitation, expansion and operation of QAIA, Kjeld Binger said: "QAIA's passenger and aircraft traffic decrease during the first four months of 2015 was largely driven by a number of route cancellations earlier this year, thus slowing flight movements.
The aerodrome role would also often include ground control duties, such as directing aircraft traffic on the runway after landing and before take off.
Issues like deconflictirtg remotely piloted aircraft traffic with civilian airspace, finding efficiencies in space operations, border control and countering transnational organized crime affect both the U.
Airfield development will include expanding aprons to provide additional aircraft parking and new taxiways to support increased aircraft traffic movement.
Aircraft traffic was also up to 65,941 movements, a 37.
Frankfurt International Airport, the main European hub both for passenger and cargo traffic, serves ~250K aircraft traffic movement (ATM) and handles more than 2.
A pick-up in demand, particularly in traffic between Europe and Asia, and the impact of cargo aircraft traffic launched in May 2010 are evident in cargo growth, the company said.
volume in light aircraft traffic that impacts on hundreds of small airstrips

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