Plain English Meaning
A painted or panelled marker on the ground near the runway that shows pilots which way to fly the landing pattern when there is no control tower.
Full Definition
A ground signal at non-towered airports, located near the runway, that visually indicates the traffic pattern in use. It consists of a triangle of segmented bars, with extensions showing the direction of the base and final approach legs for each runway, allowing pilots to determine the correct pattern direction from the air.
Context Anchor
Seen on glass-cockpit attitude displays while checking straight-and-level flight, turns, and instrument scan.