Plain English Meaning
A line of green lights set into the taxiway surface to show pilots exactly where to steer the aircraft as they taxi to or from the runway.
Full Definition
Steady-burning green lights installed along the centerline of a taxiway to show pilots the path to follow when taxiing. They are used at airports to guide aircraft along the taxiway centerline during night operations and low-visibility conditions.
Context Anchor
Seen during ground operations at towered airports, especially when taxiing at night, in fog, or on complex airport surfaces.
Why Pilots Care
They keep the aircraft on the paved taxiway surface and aligned with the correct , reducing the chance of excursions or .