Patent ID: 8917191

Claim:
A system for controlling an image displayed on a display unit of an aircraft, the system comprising: an enhanced vision system that detects elements of an approach lighting system for display on the display unit; a synthetic vision system that uses a database of navigation information and a determined aircraft location to generate synthetic display elements representing the approach lighting system; display electronics that cause the detected elements from the enhanced vision system to be simultaneously displayed on the display unit within a same scene as the generated synthetic display elements from the synthetic vision system, whereby the simultaneous display allows a pilot viewing the display unit to check for whether information provided by the enhanced vision system matches information provided by the synthetic vision system, wherein positions of the synthetic vision system elements and an enhanced vision system scene are independently derived such that neither the enhanced vision system scene nor the generated synthetic vision system elements are adjusted in response to information from the other system and neither are adjusted in response to information from a shared source.