What does IAF stand for in terms of approach procedures?

The term IAF stands for Initial Approach Fix in the context of approach procedures. It is a designated point in the flight path where an aircraft begins the initial segment of its approach to the runway. This fix is critical for pilots as it marks the transition from en route navigation to the specific approach procedure.

The IAF serves as a reference for the pilot’s descent and the subsequent navigation to the next segments of the approach, ensuring that they are aligned with the approach path. It is often defined by navigational aids such as VORs, NDBs, or GPS waypoints, and is essential for maintaining situational awareness and ensuring a safe and efficient descent into the airport.

In contrast, the other options do not accurately represent what IAF means in this context. Thus, recognizing IAF as the Initial Approach Fix helps pilots properly prepare for and execute their approach phase accurately.