CONFLICT AND SEPARATION SYMBOLS IN CDTI FOR SMALL AIRCRAFT OPERATION

This paper describes a simulation study of CDTI symbologies designed for trajectorybased operations of small aircraft. Although presenting a pilot with traffic information enhances situation awareness and enables self-separation, it may increase workload and affect other tasks. A series of pilot-in-the-loop flight simulations was carried out to investigate the relationship between traffic awareness and workload. Two types of separation symbology were devised and compared in manually flown tasks with selfsequencing and self-separation. The results show that although the newly introduced symbologies were accepted by the pilots, they did not reduce pilot interactions with the CDTI — on the contrary, pilots tended to pay more attention to the CDTI, sometimes resulting in degraded flight path tracking performance.