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Delegated separation is an air traffic management capability in which responsibility for separation from one or more aircraft is assigned to the flight crew by an air traffic controller, in specific tactical situations, to improve operational efficiency in the National Airspace System (NAS). In this human-in-the-loop (HITL) simulation, 8 airline pilots flew departure and arrival scenarios while using a cockpit display of traffic information to maintain separation from a lead airplane. Pilots reported that workload for the departure and arrival tasks was well within acceptable limits and that they would be willing to perform this task with the CDTI as implemented in this study. Objective spacing performance showed reduced spacing compared to the baseline condition where controllers retained separation responsibility. The observed baseline and delegated separation spacing distributions were applied to a fast time simulation to estimate the departure throughput benefit that may result from the application of these procedures. The estimated improvement in arrival rate was about 3 per hour for single runway arrivals, and NN about 4 per hour for single runway departures. Implicationsfor NextGen operational improvement are discussed.

The Cockpit Display of Traffic Information (CDTI) Enhanced

At many busy airports maximum efficiency and minimum delay occur when visual approaches are being conducted by pilots using visual separation from traffic for a portion of the approach. Pilot willingness to accept responsibility for visual separation also affords controllers maximum flexibility in traffic management under conditions of high traffic load. It may be possible to extend that efficiency to lower weather conditions if pilots are able to perform the same separation tasks by reference to a Cockpit Display of Traffic Information (CDTI) in lieu of visual contact outthe-window (OTW). This concept is termed CDTI Enhanced Flight Rules (CEFR). Use of CEFR procedures may be applicable during visual or instrument approaches (with visual approaches being the likely initial implementation).This study is the second in a series that examined the instrument approach application with particular attention to the effect of CDTI location and size on spacing performance. This paper will cover the results based on CDTI location and size responses. The entire set of results, including those on the CEFR concept, can be found in Bone, Helleberg, Domino, and Johnson, 2003a. approaches, as the pilot flying, in a flight deck simulator, while maintaining a self-determined visual separation from traffic-to-follow (TTF) by mixed reference to a visual scene and a CDTI. Speed management was used to adjust spacing to a pilot-determined value. The results indicate that pilots are willing and able to perform the CEFR procedure via any of the CDTI sizes or locations tested in the simulation.Eight commercial airline pilots flew coupled