If a control tower and an FSS are located on the same airport, what function does the FSS provide when the tower is closed?

If a control tower and an FSS are located on the same airport, what function does the FSS provide when the tower is closed?

• A. Airport Advisory Service.
• B. Automatic closing of the IFR flight plan.
• C. Approach control services.
• D. Enroute weather briefing only.

Answer: (A)

When the control tower is closed, the airport becomes uncontrolled. If a Flight Service Station is located at the same airport, it provides Airport Advisory Service, giving pilots informational updates about airport operations such as active runways, traffic patterns, and other essential notes. This is an advisory, non-ATC service and does not include ATC clearance or radar separation. Other options—approach control, automatic IFR flight plan handling, or enroute weather briefing only—do not describe the specific function the FSS provides at a towered airport when the tower is closed.

When the control tower is closed, the airport becomes uncontrolled. If a Flight Service Station is located at the same airport, it provides Airport Advisory Service, giving pilots informational updates about airport operations such as active runways, traffic patterns, and other essential notes. This is an advisory, non-ATC service and does not include ATC clearance or radar separation. Other options—approach control, automatic IFR flight plan handling, or enroute weather briefing only—do not describe the specific function the FSS provides at a towered airport when the tower is closed.