Royal Australian Air Force Base Edinburgh (ICAO: YPED) is located in Edinburgh, 25 km (16 mi) north of the centre of Adelaide, South Australia. It is primarily home to No 92 Wing and their Lockheed AP-3C Orion maritime patrol aircraft that conduct surveillance operations throughout Australia's airspace. However, after an extensive building program over the course of 2010-2011, it has also become the home of 7th Battalion, Royal Australian Regiment and some smaller units. This has pushed the daily working population of RAAF Base Edinburgh beyond 4,500 from 6am-6pm.