Which RNP value is associated with approach navigation in the U.S.?

The RNP value associated with approach navigation in the U.S. is RNP 0.3. This designation indicates that the navigation system must maintain a certain level of accuracy to ensure safe and precise navigation during approach procedures, typically within 0.3 nautical miles of the intended flight path.

RNP, or Required Navigation Performance, is a concept that integrates the performance of the navigation system with the operational requirements of the procedure being flown. For approaches, specifically, the lower the RNP value, the tighter the required accuracy. RNP 0.3 is commonly used for various precision approaches, allowing aircraft to follow a more accurate trajectory to the runway, thereby enhancing safety and efficiency in the terminal airspace.

Other RNP values mentioned do not apply specifically to approach navigation in the same manner. Higher RNP values, such as RNP 1.0, RNP 2.0, and RNP 3.0, correspond to less stringent accuracy requirements that are typically suitable for en-route or departure operations, rather than the more precise demands of an approach phase. Hence, RNP 0.3 is the correct choice for approach navigation in the U.S.