EACAC 2000 Real-Time Experiments Initial Evaluation of Limited Delegation of Separation Tasks to the...

The report presents the analysis of the EACAC '00 experiment, covering the June and November sessions. This 2x2-weeks experiment aimed at assessing the limited delegation of separation assurance from controllers to flight crews. Two contexts were considered: sequencing applications in extended terminal areas (from cruise to initial approach fix), crossing and passing applications in en-route airspace. Twelve controllers from different European countries participated. The airspace simulated was part of the Paris area, and consisted of two measured sectors. The feeling from controllers is positive: the delegation is perceived as satisfying, and should enable a workload reduction. The acceptance is also revealed by the significant rate of use. The main results are twofold. First, delegation allows for a significant reduction in the number of manoeuvring instructions. Second, the analysis of the geographical distribution of these instructions shows they are given earlier with delegation. This suggests a positive impact on controller activity, although monitoring tasks were not investigated. Typically in extended terminal area, while building sequences still remain to the controllers, maintaining sequences is delegated to flight crews. It was observed however that the sector configuration has an impact on the use of delegation. In terms of efficiency, time, distance and fuel consumption are slightly reduced, and it appears that trajectories become more stable. Workload issues were investigated through self- assessment and physiological measurements, however they did not provide a clear view. In terms of safety, no significant trend emerges. Impacts were more significant in extended terminal area than in en-route.

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EACAC 2000 Real-Time Experiments Initial Evaluation of Limited Delegation of Separation Tasks to the...