What factor determines the distance from the FAF to the runway on a profile view?

The distance from the Final Approach Fix (FAF) to the runway on a profile view is primarily determined by Plate Dependence. This refers to the specific approach procedures outlined on published approach plates, which are designed for each type of approach. These plates specify the required distances to ensure safe and efficient aircraft operation during the approach phase of flight.

Approach plates take into consideration various factors such as terrain, obstacle clearance, and standard approach procedure design, which include ideal distances for different types of approaches. Therefore, when pilots and air traffic controllers refer to an approach plate, they are adhering to these published standards, which dictate the necessary distance from the FAF to the runway.

While aircraft type, weather conditions, and air traffic control instructions may influence how an approach is flown or may affect the specific arrival procedures, the distance itself is fundamentally based on the established charts laid out in the approach plates.