Plain English Meaning

A row of approach lights at the runway end that includes flashing lights firing one after another toward the runway, helping pilots see and line up with the runway when visibility is poor.

Full Definition

A category of airport approach lighting installed at the approach end of a runway, consisting of a 1,400-foot configuration of medium-intensity steady-burning white lights aligned with the runway centerline, augmented by sequenced flashing lights in the outer portion of the system. The sequenced flashers fire in rapid succession toward the runway threshold, producing a visual 'rabbit' effect that helps pilots and align with the runway during in reduced visibility.