Description

A HUD - Head Up Display - is a means of presenting information to the pilot in the line of their external forward vision which projects key flight instrument data onto a small ‘see-through’ screen positioned just in front of the pilot line of sight looking ahead out of the aircraft.

First collimators and now holographic technology makes the image on the screen appear to be far out in front of the aircraft so that the pilot does not have to change eye focus to view a screen which may only be 20cm away. The principle benefit of this has been seen as easing, in both directions, the transition between control of the aircraft by reference to the instrument panel and by reference to external cues. It also neatly facilitates a combination of these sources for single pilot operations.