| abstract |
A display system is disclosed for a navigation director system in which a portion of an azimuth stabilized navigation chart is displayed optically with the aircraft position on the chart at the center of the display, and a selected radial course for VOR airway navigation is displayed optically as a course bearing indicator (CBI) in the form of an arrow that points to a course bearing on an azimuth stabilized compass ring. The center of the arrow is replaced by a lateral deviation bar (LDB) that is displaced from the CBI in proportion to the angular deviation of aircraft position from the selected course. For area navigation between selected way points on the chart, the CBI is positioned to indicate the course bearing of a computed great circle route and the LDB is displaced in proportion to the cross-track distance off course. For conventional VOR navigation, the chart display may be independently turned off. |