A centralized clock system in the ATC is to set the time standard according to the international time reference derived from the GPS (Global Positioning System). It's also used to synchronize between all the elements the time signal as well as to set and display standard times for control reference
BATCC (Backup Air Traffic Control Center)
In the event of a serious fire or hazardous incident which render the ATC complex not able to perform it's original functions , normal Air Traffic control services will be severely disrupted.To maintain the continuous ATC service the backup air traffic control complex equipped with all essential backup ATC facilities will be activated.These backup facility can support about 30% of the air traffic control handling capacity to maintain a safe and orderly flow of air traffic.
Different types of Controllers in ATC
Tower Controllers direct the movement of vehicles on the runway(s) and taxiways
They Check flight plans, give pilots a clearance for takeoff and landing and direct the movement of other aircraft on the runway and other parts of the airport.Tower controllers are also suppose to ensure that all the lights installed in the runways and taxiways are functional.most of them work from the control tower as they generally must be able to see the traffic they control.
Approach and Departure Controllers ensures that the aircraft travelling within an airspace maintain minimum separation for air safety.
they give clearance to the aircraft to enter controlled airspace and handover the control of the aircraft to en route controllers.
they use RADAR to monitor flight paths and work in the building known as terminal radar approach control centers (TRACKON) they also provide information to pilots regarding weather conditions and critical notices
En route controller monitor aircraft once they leaves an airports airspace they work at air route traffic control centers located throughout the country which are typically not located at airports.
each center is assigned an airspace based on the geography and altitude of the area in which it is located
As an airplane approaches through and flies through a centres airspace en route controllers guide the airplane along it's route they must adjust the flight path of the aircraft for safety and collision avoidance. As an airplane goes along it's route, en route controllers hand off to the next control center, Approach control or tower control along the path as needed
Air traffic controllers typically do the following
they issue landing and takeoff instructions to the pilot
monitor and direct the movement of aircraft on the ground and in the air using RADAR computers and visual references
manage communications - by transferring control of departing flights to traffic control centers and accepting control of flights
provide information to pilots such as weather updates, runway in use, runway closure and other critical information
Alert airport response staff in the event of an airport emergency
they use Styrofoam to suppress the fire
Air Traffic controllers primary concern is safety. they manage the flow of the aircraft into and the out of the airport airspace guide pilots during takeoff and landing and monitor aircraft as they travel through the skies.
Controllers usually manage multiple aircraft at the same time and must make quick decisions to ensure the safety of the aircraft.Ex:A controller may direct one aircraft on it's landing approach while providing another aircraft with weather information