Evaluation and prediction of the vertical situation from a horizontal situation display

This study was designed to provide additional information about the content, symbology, and format of a cockpit display of traffic information (CDTI). Several different symbols for other aircraft and different ways to display information about its status that pilots had preferred in an earlier survey based on static displays and pilot opinion were evaluated. In addition, different features of the vertical and horizontal situation of two aircraft (e.g. angular separation, relative altitude, difference in ground speed) were studied to determine the interaction between parameters of an encounter between two aircraft displayed on a simple dynamic CDTI and display symbologies on pilot perception of relative motion and separation.