The work of the air traffic controller is necessarily closely interwoven with the instrumentation of the control system and it is difficult without actual operational studies to establish which tasks ought to be automatized and which left to the man. This paper describes tests carried out with existing instrumentation to convert a conventional radar display into a television-type display. The indication from the tests is that a 1000-line system would be needed. The paper was presented at the annual meeting of the German Navigation Society in Dusseldorf, 5–7 June 1962, and is printed with the kind permission of that body.