Flight Investigation of Cockpit-displayed Traffic Information Utilizing Coded Symbology in an Advanced Operational EnvironmentDefense Technical Information Center, 1980 - 31 pages Studies initiated during the early 1970's provided initial exploration of traffic-situation display concepts in a simulation environment. During the present study, the traffic symbology was encoded to provide additional information concerning the traffic, which was displayed on the pilots' electronic horizontal situation indicators (EHSI). The purpose of this study, which was conducted using a research airplane representing an advanced operational environment, was to assess the benefit of coded traffic symbology in a realistic work-load environment. Traffic scenarios, involving both conflict-free and conflict situations, were employed. Subjective pilot commentary was obtained through the use of a questionnaire and extensive pilot debriefings. These results grouped conventiently under two categories: display factors and task performance. A major item under the display factor category was the problem of display clutter. The primary contributors to clutter were the use of large map-scale factors, the use of traffic data blocks, and the presentation of more than a few airplanes. In terms of task performance, the CDTI was found to provide excellent overall situation awareness. Additionally, the pilots expressed a willingness to utilize lesser spacing than the 2 1/2 nautical mile separation prescribed during these tests. (Author). |
Common terms and phrases
advanced operational environment Air traffic control airplane 8 Path airplane data blocks airplanes displayed altitude and speed ATC control AVRADCOM Research CDTI equipped Cockpit Display coded symbology coded traffic symbology commentary was obtained dead band deviation of airplane display clutter Displayed flight paths displayed traffic electronic horizontal situation encoded flight crew flight paths Path Gerald L horizontal situation indicator K₂S Langley Research Center map scales NASA nautical mile number of airplanes overall situation awareness overflight airplane own-ship Path deviation path of airplane Path of overflight Point of conflict presentation of traffic problem questionnaire and extensive research airplane scale factor selected shown in figure situation display speed call Subjective pilot commentary subtended viewing angle SYNC task performance test subjects tion traditional piloting task traf traffic data blocks traffic display Traffic scenario traffic situation vector control mode Velocity vector control Vref VVCM VVCME Waypoint Work-load Yenni