MATS personnel working in the Area Control Centre (ACC) are responsible for providing control and information useful for the safe and efficient conduct of flight by means of radar. The radar system in Malta gathers information from 5 different radar stations. Two are locally based, one at Luqa and the other at Dingli. The third radar is situated at Ustica just north of Palermo, Sicily. Two radar stations in Greece, at Kithira and Lefkas provide coverage of the East sector of the Malta airspace. The minimum Radar separation in Malta FIR is either: • 10 nautical miles (NM) (outside Malta TMA) • Or • 5 nautical miles (NM) (within the Malta TMA and the airspace above it) This means that aircraft flying at the same level in the Maltese airspace are kept 10NM or 5NM horizontally apart depending in which part of the airspace they are operating in.