What determines access to RNP airspace?

Access to RNP (Required Navigation Performance) airspace is primarily determined by an aircraft's capability and the level of service it provides.

RNP airspace requires aircraft to have specific navigation capabilities that meet predefined performance standards. This includes the ability to navigate accurately along defined flight paths and to perform required lateral and vertical navigation with precision. The aircraft's navigation system must support RNP levels that specify the acceptable limits for lateral deviation from the flight path and the vertical navigation path, enhancing safety and efficiency in the airspace.

Additionally, the level of service pertains to the air traffic management and the services that are provided based on the aircraft’s navigation capabilities. Higher RNP levels may allow for more direct routing and reduced separation standards, thus optimizing airspace usage.

While factors like weather conditions, pilot experience, type of navigation system used, flight altitude, and speed intersect with operational decisions, they do not fundamentally determine the access to RNP airspace like aircraft capability and level of service do.