An integrated display for either alternately or simultaneously displaying pressure derived barometric altitude and radar altimeter readings within a single display structure. Barometric altitude is displayed on a dual-counter and drum and a dial face and pointer to provide a barometric altitude reading and to further provide analog trending information. Radar altitude is displayed in a multi-segment filament or light emitting diode device. Means are provided for automatically energizing the radar altitude display at and below a predetermined altitude. Integration of the displays into a single indicator structure saves valuable panel space within a most critical area of the aircraft instrument panel. Circuitry is provided to generate a visual and/or audible alarm when the radar altitude is equal to or below the minimum decision height (MDH). The two altitude readings, i.e., pressure and radar derived, serve as accuracy checks on one another.
展开▼
