Which sign marks the exit boundary of the ILS critical area?

Which sign marks the exit boundary of the ILS critical area?

• A. ILS Critical Area Boundary
• B. ILS Critical Area Hold Position
• C. Runway Location
• D. Taxiway Location

Answer: (A)

The important idea here is knowing how airport signs indicate the protected ILS area. The sign that marks the exit boundary of the ILS critical area is specifically the ILS Critical Area Boundary sign. It shows the point beyond which you have left the protected zone around the instrument landing system, meaning you’re no longer required to hold or coordinate with ILS operations and can proceed normally. This sign is placed so you can recognize you’re past the critical area boundary as you exit. In contrast, the ILS Critical Area Hold Position sign marks where you must stop before entering the critical area, not where you leave it. The Runway Location and Taxiway Location signs point to runway or taxiway identifiers, not to the boundary of the ILS protection.

The important idea here is knowing how airport signs indicate the protected ILS area. The sign that marks the exit boundary of the ILS critical area is specifically the ILS Critical Area Boundary sign. It shows the point beyond which you have left the protected zone around the instrument landing system, meaning you’re no longer required to hold or coordinate with ILS operations and can proceed normally.

This sign is placed so you can recognize you’re past the critical area boundary as you exit. In contrast, the ILS Critical Area Hold Position sign marks where you must stop before entering the critical area, not where you leave it. The Runway Location and Taxiway Location signs point to runway or taxiway identifiers, not to the boundary of the ILS protection.