A set of aircraft and flight crew requirements needed to support performance-based navigation operations within a defined airspace. There are two kinds:
- RNP specification – based on area navigation that includes the requirement for performance monitoring and alerting, designated by the prefix RNP; e.g., RNP 4, RNP APCH.
- RNAV specification – based on area navigation that does not include the requirement for performance monitoring and alerting, designated by the prefix RNAV; e.g., RNAV 5, RNAV 1.
Source FAA Pilot/Controller Glossary · checked 2026-08-25