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Washington ARTCC utilizes four rows of radar stations, which contain the 40 sectors into which the center's airspace is divided. On an average day, each of these sectors is manned by two controllers. One controls the aircraft on the radar screen, talking directly to the aircraft he is working and issuing control instructions. The other controller completes all the necessary coordination required between their sector and ° sectors surrounding them, ensuring that proper airspace is allocated for aircraft to transition between sectors: Controllers must maintain a minimum separation distance between aircraft they are controlling of at least five miles apart horizontally, and 1,000 feet vertically.
All enroute air traffic control centers operate in the same manner. Each enroute center is divided into sectors, staffed with controllers that control the aircraft on their way. Each aircraft in a sector is represented by a blip or target symbol, with a printed data block alongside, displaying pertinent flight information. This data is received from electronic devices in the aircraft, continually transmitting coded signals on altitude and flight information to the air traffic control facility. These signals are picked up and relayed to the center by one of seven radar systems located within the center’s territory.
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