Definition
A synthetic runway image displayed on a flight deck synthetic vision system (SVS), generated from terrain databases and the aircraft's position, that depicts the runway as it would appear out the window even when actual visibility is reduced or obscured.
Plain English
A picture of the runway drawn on the cockpit display by the airplane's computer, using stored map data and the aircraft's known position, so the pilot can see where the runway is even when they can't see it through the windshield.
Context Anchor
Seen during instrument takeoff discussions, especially when an aircraft display provides a visual runway reference for alignment in poor visibility or at night.
Derivation
“Computer-generated” means made by a computer rather than seen directly. “Generate” comes from a root meaning “to bring forth” or “produce,” which fits here because the runway picture is produced by the aircraft’s display system, not by the pilot’s direct view outside.
Why Pilots Care
Provides precise directional guidance on the display when fog, darkness, or other conditions prevent visual reference to the actual runway, reducing the risk of runway excursion during the initial takeoff roll.
Analogy
It is like a navigation app drawing the road on a screen. The drawing can help you stay oriented, but it is still a computed picture, not the actual road in front of your eyes.
Intuition Check
Do not assume a computer-generated runway is a real outside view of the runway. It is a display-created picture showing where the runway should be based on the aircraft system’s information.
Example Sentence 1
During the low-visibility takeoff, the pilot used the computer-generated runway on the synthetic vision display to confirm centerline alignment.
Example Sentence 2
The computer-generated runway remained centered on the display as the aircraft accelerated through the low-visibility takeoff.