JO 7110.65 — Air Traffic Control
JO 7110.65 3-4-7
SEQUENCED FLASHING LIGHTS (SFL)
This reproduces published FAA reference text for study. It does not replace the current official FAA publication or regulation.
Operate Sequenced Flashing Lights:
NOTE-
SFL are a component of the ALS and cannot be operated when the ALS is off.
When the visibility is less than 3 miles and instrument approaches are being made to the runway served by the associated ALS.
As requested by the pilot.
As you deem necessary, if not contrary to pilot's request.
Retrieved from ecfr.gov on July 20, 2026.