An airspace of defined dimensions within which Flight Information Service and Alerting Service are provided.

1. Flight Information Service. A service provided for the purpose of giving advice and information useful for the safe and efficient conduct of flights.
2. Alerting Service. A service provided to notify appropriate organizations regarding aircraft in need of search and rescue aid and to assist such organizations as required.

Listed in the Pilot/Controller Glossary as a cross-reference to FLIGHT INFORMATION REGION, whose text is shown above.

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