Control Centre (Military) (ScATCC(Mil)) to control military aircraft flying within the airspace above Scotland. Around the same time, a civilian air traffic control service began to meet the demand from the expanding civil aviation market. The unit was staffed by RAF Air Traffic Control Officers and Air Traffic Control Assistants. Both military and civilian aircraft were controlled by RAF controllers who provided a variety of air traffic services predominantly outside controlled airspace or within airspace designated as Military Training Areas. A Distress and Diversion (D&D) cell was co-located with ScATCC (Mil), tasked with assisting aircraft in distress and/or encountering emergency situations. In April 1977, the D&D cell and the Air Defence Notification Centre (North) (ADNC) moved into new premises at Atlantic House, followed by ScATCC (Mil) on 2 November 1978. ADNC (North) closed on 31 March 1997, with approximately 65 RAF staff remaining at Prestwick. The Freedom of the South Ayrshire was awarded to RAF Prestwick on 17 July 2009. In November of that year, the unit moved to the new NATS Prestwick Centre, built adjacent to Atlantic House, which accommodates the NATS civilian controllers providing oceanic and Scottish area control services. The Prestwick Distress & Diversion Cell closed in December 2012 when D&D operations moved to RAF (Unit) Swanwick in Hampshire. Role and operations Prior to its closure, RAF Prestwick's mission statement was "To contribute effectively to the delivery of airpower by assisting with the protection of the integrity of the UK’s airspace and being at the forefront of excellence in the provision of the air traffic control, airspace management and support services." The main responsibilities of RAF Prestwick was to provide air traffic control (ATC) services to military aircraft carrying out the following activities. Flying between 25,000 ft and 66,000 ft Crossing the national airways system On transit flights operating below 25,000 ft outside controlled airspace On operations (such as air-to-air refuelling) The Distress and Diversion (D&D) Cell was one of two D&D Cells (the other RAF (U) Swanwick) established to provide assistance to both military and civil aircraft experiencing an emergency. The cell maintained a continuous listening watch on both guard frequencies, 121.5 MHz for civilian aircraft and 243.0 MHz for military aircraft and was responsible for co-ordinating responses within UK airspace north of Newcastle and contacting the Aeronautical Rescue Co-ordination Centre (ARCC), which at the time was based at RAF Kinloss in Moray. The unit at