What is the sensitivity of the GPS CDI within 2 nautical miles of the FAF during an approach?

The sensitivity of the GPS Course Deviation Indicator (CDI) within 2 nautical miles of the Final Approach Fix (FAF) during an approach is indeed 0.3 nautical miles. This increased sensitivity is designed to provide pilots with finer guidance as they approach the runway, ensuring precise navigation to the approach path.

During the final approach phase, it's crucial for pilots to have accurate guidance as they transition from enroute navigation to landing. The CDI sensitivity changes as the aircraft nears the FAF, allowing for more precise tracking of the desired flight path. This reduction in sensitivity helps in minimizing course deviations that could lead to unsafe approaches.

Within this range, a 0.3 nautical mile sensitivity allows for better guidance in terms of lateral navigation and helps in confirming that the aircraft is aligned with the approach course. Understanding this sensitivity is essential for conducting instrument approaches safely and effectively, especially when the margins for error are minimal.