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RUNWAY STATUS LIGHTS (RWSL) SYSTEM

Airport Operations

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The RWSL is a system of runway and taxiway lighting to provide pilots increased situational awareness by illuminating runway entry lights (REL) when the runway is unsafe for entry or crossing, and take-off hold lights (THL) when the runway is unsafe for departure.

Source FAA Pilot/Controller Glossary · checked 2026-08-25

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