Definition
A type of approach lighting system installed at the approach end of a runway, consisting of a short configuration of steady white lights combined with sequenced flashing lights that pulse rapidly toward the runway threshold. It is a simplified, shorter version of a full approach lighting system, designed to give pilots clear visual guidance during the final segment of an approach in reduced visibility.
Plain English
A short row of runway approach lights with bright flashes that ripple toward the runway, helping the pilot line up and find the runway when visibility is poor.
Context Anchor
Seen in airport lighting descriptions, runway information, and notices about airport conditions.
Derivation
The name describes the system: 'simplified' (a stripped-down version), 'short' (less length than a full approach lighting system), and 'sequenced flashing lights' (the rapid running flashes pilots see pulsing toward the runway).
Why Pilots Care
Helps pilots recognize the exact lighting setup available and use it for safe alignment during low-visibility approaches.
Grounding Statement
On final approach, the sequenced flashing lights appear to move toward the runway, helping draw your attention to the correct landing area.
Intuition Check
SELF does not mean “by itself” here. In this FAA context, SELF is an abbreviation for a specific runway approach lighting system.
Example Sentence 1
The chart noted that runway 27 was equipped with a SELF, so the pilot expected a short row of approach lights with sequenced flashes leading to the threshold.
Example Sentence 2
Runway 27 is equipped with SELF to provide visual guidance on the ILS approach.