The FSS primarily responsible for providing FSS services, including telecommunications services for landing facilities or navigational aids located within the boundaries of a flight plan area (FPA). Three-letter identifiers are assigned to each FSS/FPA and are annotated as tie-in facilities in the Chart Supplement and accessible through FAA Order JO 7350.9, Location Identifiers.

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