Improved accuracy of radar data coupled with the advent of digital data handling methods and improved communication facilities via digital ground/air data links could enable a major step forward to made in the field of detailed flight control of aircraft.The paper examines in detail the requirements which already exist and are foreseen for flight control and indicates some of the advantages to be gained from it. A review follows of how digital data processing techniques can be applied to solve many of the problems. An indication is given of the relationship and optimum balance between man and machine. Finally information is given on the accuracy which can be expected from an up-to-date system.