System with all-weather capability for the engagement of low-flying aircraft and aircraft flying in the lower and medium altitude ranges up to 3000 m. The system deals with airspace surveillance, target acquisition, calculation of leads and the control of two 35 mm anti-aircraft guns 63/12. An optical target seeker is connected to detect surprise targets appearing at very short range. The operating crew consists of a fire-control officer or NCO, two operators and the operator of the target designator, which is outside the cab. Combat effectiveness enhancement was decided on in the 1997 Armaments Programme. Improved target detection, improved target acquisition by the tracking radar, improved hit probability on manoeuvring aircraft, increased electronic jamming resistance and automation of certain operating sequences. In addition, new mission simulators were procured.