What is the approach slope requirement for visual runways?

The correct approach slope requirement for visual runways is 20:1. This means that for every 20 units of horizontal distance from the runway threshold, the height above the runway must increase by 1 unit. This slope is essential for ensuring that aircraft have a safe and unobstructed path as they approach for landing.

In the context of airport operations, having a standard approach slope is crucial for both pilot awareness and safety during landing operations. A 20:1 slope provides a balance between operational flexibility and safety requirements, accommodating various aircraft types while minimizing risk associated with obstacles that may exist in the approach path.

Understanding the approach slope requirements is critical for airport managers in planning and maintaining safe operations around visual runways. This knowledge helps in assessing terrain and obstacle clearance, which is vital in safeguarding aircraft during their landing approach.