Communication in Air Traffic Control (1970): Visits to London Control Centre, the Prestwick Oceanic Control Centre, the UK Civil Aviation Centre and the RAF Airmove Network reveal the intricacies and complexities of the then range of communications - ground to air, air to ground and ground to ground - at the disposal of air traffic controllers including VHF and UHF radio signals, radar - both primary location and secondary surveillance variants, Flight Plan Processing Computers and Radar Aerodrome Surface Movement Indicators. The film includes footage of the Trident and prototype Concorde aircraft.