Chapter    4

Artificial Horizons

An artificial horizon is defined by the Oxford English Dictionary as “a gyroscopic instrument or a fluid surface, typically one of mercury, used to provide the pilot of an aircraft with a horizontal reference plane for navigational measurement when the natural horizon is obscured.” Artificial horizons have been used for navigational purposes long before augmented reality (AR) came into existence, and navigation still remains their primary use. They came into prominence when heads up displays came into mass use in planes, especially with military aircraft.

Artificial horizons are basically a horizontal reference line for navigators to use if the natural horizon is obscured. For all of us people who are obsessed ...

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