A new data visualization technology is demonstrated for en-route tactical aircraft separation maintenance. This technology displays maneuver space (MS), a nonveridical coordinate space based on the four key maneuver elements of heading, speed, altitude, and available maneuver time. In this first major test of a prototype 4D collision avoidance system (4CAS), eight licensed general aviation pilots each flew eight simulated free flight scenarios, with the goal of deviating as little as possible from a pre-assigned flight path, while still maintaining standard separation from traffic. Compared to a cockpit display of traffic information (CDTI), the CDTI+4CAS condition showed performance advantage for one dependent measure of maneuver efficiency, two measures of safety, and two measures of workload.
Knecht, W. R.
(2007). Testing a Maneuver Space-Based Collision Avoidance System: Experiment 1. 2007 International Symposium on Aviation Psychology, 339-345.