What accuracy does En-route RNP require?

En-route RNP (Required Navigation Performance) specifies a navigation accuracy requirement that must be met for flight operations. The accuracy requirement for En-route RNP is set at ±2 nautical miles for 95% of the flight time. This means that during the majority of the time spent in flight, a vehicle must be able to maintain its position within 2 nautical miles of the intended flight path.

This specific accuracy is crucial for safely managing air traffic and ensuring that aircraft remain correctly positioned along their routes. It allows for a safe buffer that accommodates various navigation errors while still ensuring the efficient flow of air traffic.

Maintaining this level of accuracy aids pilots and air traffic controllers in effectively managing flight paths and enhances overall situational awareness during navigation. This standard ensures that operations can proceed safely, particularly in congested airspace or when operating near other aircraft.