A head-up display,also known as a HUD, is any transparent display that presents data without requiring users to look away from their usual viewpoints. The origin of the name stems from a pilot being able to view information with the head positioned "up" and looking forward, instead of angled down looking at lower instruments. A HUD also has the advantage that the pilot's eyes do not need to refocus to view the outside after looking at the optically nearer instruments. Although they were initially developed for military aviation, HUDs are now used in commercial aircraft, automobiles, and other (mostly professional) applications.

The HUD is mounted on the top center portion of the instrument panel. The four-inch optical system provides a total field of view of 20 degrees. All data concerning the size, location and movement of the HUS symbols are prossesed in digital form and converted into analog signals whitch drive the CRT deflection circuits. The computer/symbol generator receives data from various sensors in the aircraft and generates the symbology required for the pilot's display unit. The HUD display's attitude, altitude, vertical velocity,speed and other info.