A POFZ is provided for a precision runway when a ________ is provided to the runway, when the reported ceiling is below _____ or visibility conditions less than ___________, or when an aircraft is on its final approach within _____ of the runway threshold.

A POFZ is provided for a precision runway when a ________ is provided to the runway, when the reported ceiling is below _____ or visibility conditions less than ___________, or when an aircraft is on its final approach within _____ of the runway threshold.

• A. Horizontally Guided Approach
• B. Vertically Guided Approach
• C. Instrument Landing System
• D. Visual Approach

Answer: (B)

Vertical guidance on a precision approach provides a precise descent path and guaranteed obstacle clearance. A POFZ is established for a precision runway specifically when a vertically guided approach is available to the runway, because that vertical guidance is what allows continued safe descent under lower ceilings or poorer visibility, and during the final approach segment near the threshold. When ceilings are below minimums or visibility is less than minimums, or when an aircraft is close to the runway on final, the protection offered by a vertically guided path is essential, which is why this scenario centers on vertically guided approaches.

Vertical guidance on a precision approach provides a precise descent path and guaranteed obstacle clearance. A POFZ is established for a precision runway specifically when a vertically guided approach is available to the runway, because that vertical guidance is what allows continued safe descent under lower ceilings or poorer visibility, and during the final approach segment near the threshold. When ceilings are below minimums or visibility is less than minimums, or when an aircraft is close to the runway on final, the protection offered by a vertically guided path is essential, which is why this scenario centers on vertically guided approaches.