At area control  centers air traffic controllers work at Radar- and  Coordinator working  positions responsible for a defined area (sector) within the controlled  airspace  of jurisdiction.

The Radar Controller shall provide radar service to aircraft under control as far as these are within controlled airspace:

 In particular personnel shall

• identify aircraft and maintain identification by monitoring the flight of  aircraft within controlled airspace.
• vector aircraft in controlled airspace to provice separation or navigational  assistance.issue  clearances and istructions to ensure that radar separation minima  are not  infringed in controlled airspace at any time.
• issue  clearances and instructions to ensure that radar separation minima are not  infringed in controlled airspace at any time and mark clearances and instructions  on control strips.
• issue  information to aircraft concerning unkown targets and adverse weather areas when deemed necessary and workload permits.
• Vector aircraft  clear of such areas if requestedby aircraft.
• perform  flight information and alerting service in the own area of  jurisdiction.

In particular personnel shall

• obtain  and forward information necessary for the orderly performance of air traffic control service.
• issue  entry clearance to adjoining control units.
• perform  and receive radar-hand-offs to/from adjoining sectors or control  units.
• establish and maintain an actual traffic picture and, if necessary, advise the  radar controller on infringements of separation.