1. An integrated multicolor map display of an airplane's position combined with a color weather radar display, plus a scale selected by the pilot, together with information on wind directions and velocities, horizontal situations, and deviation from the planned vertical path.
2. An instrument which may display bearing and distance to a navigation aid, magnetic heading, track/course and track/course deviation.
3. An electronically generated display that provides a basic horizontal view of the aircraft's navigation picture.
4. A combination instrument which shows a pilot the actual coarse, as compared to the intended coarse, and the relationship of the aircraft to the glide slope.