What is the accuracy requirement for Terminal and Departure RNP?

The accuracy requirement for Terminal and Departure Required Navigation Performance (RNP) is indeed ±1 NM for 95% of flight time. This standard is crucial for ensuring that aircraft operating in terminal and departure phases maintain a high level of navigation precision.

Achieving this accuracy level allows for safe separation between aircraft during critical phases of flight, such as takeoff and landing, where navigational errors can have significant implications. The requirement ensures that the navigation systems used by aircraft are capable of providing guidance that keeps them within specified boundaries, thereby enhancing safety and efficiency in air traffic operations.

In the context of the choice provided, the other options refer to different accuracy levels that are not applicable to Terminal and Departure RNP. Those variations represent more relaxed accuracy standards used in other contexts, but for Terminal and Departure procedures, maintaining a standard of ±1 NM is essential for flight safety and operational reliability.