Segmented Circle

A visual ground-based airport indicator system, typically found at non-towered airports, that provides traffic pattern information to pilots overhead. It consists of a circle of markers visible from the air, with extensions showing the active runway, traffic pattern direction (left or right traffic), and a wind indicator (windsock or tetrahedron) at the center. Pilots unfamiliar with an airport should overfly and check the segmented circle before entering the pattern.