The Australian Advanced Air Traffic System (TAAATS) (pronounced tats, or tarts), is the hardware and software system used by Airservices Australia for air traffic control services. It is a paperless, computer-based system, which serves as an aid to civilian air traffic controllers. It does not control aircraft, but gives the user a display of information about an aircraft's position and associated information. It also handles communications and other information exchanges. The Australian Advanced Air Traffic System, or TAAATS is one of two systems in Australia, the other being the Australian Defence Air Traffic System (ADATS), which is used by the military. TAAATS makes use of the Thales Eurocat system and is used in two FIRs, Melbourne and Brisbane. It is also used in Terminal Control Units (TCUs) in Adelaide, Perth and Sydney. It was developed and implemented in the late 1990s and commissioned in March 2000. The introduction of TAAATS increased controllers' productivity. The system is being replaced by OneSky which will be the first integrated civil-military air traffic management system for any country. OneSKY is expected to be operational by 2021. The TAAATS console There are several facilities which use TAAATS in Australia. The two main area control centres in Brisbane and Melbourne both have roughly 42 operational consoles or "suites" and each suite has four computer screens: Air Situation Display (ASD): This main screen displays a map of the sector that shows the location of all aircraft in the controller's airspace, as reported by one of several data sources – radar data processing, flight data processing and automatic dependent surveillance. Aeronautical Reference Data Display & Distribution System (ARDDDS): A display providing access to a wide range of information including aircraft performance data, weather radar, airport/navigation aid/tracking point codes, airline ICAO designators, Standard Arrival Route (STAR) and Standard Instrument Departure (SID) charts and depiction of the airspace setup for TMA sectors. Voice Switching and Communications Select (VSCS) panel: A touch-sensitive screen allows controllers to choose the radio frequency they need to talk to pilots and ground staff, or the intercom for talking with other controllers. Auxiliary Display: The controller can call up a wide range of information such as weather forecasts, flight plans, strip windows, secondary maps and other material for the information of themselves and pilots. How TAAATS works There are two flight information regions (FIRs) separated by an approximately diagonal line running from the northwest near the