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Aviation Glossary :: Required Navigation Performance (RNP)  Aviation Glossary :: Required Navigation Performance (RNP) FAA Written Test Preparation
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Required Navigation Performance (RNP)
Required Navigation Performance (RNP)
Required Navigation Performance (RNP): A specified level of accuracy defined by a lateral area of confined airspace in which an RNP-certified aircraft operates.
source: FAA Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25A)
REQUIRED NAVIGATION PERFORMANCE (RNP) (USA/FAA): A statement of navigation position accuracy necessary for operation within a defined airspace. RNP is performance-based and not dependent on a specific piece of equipment. RNP includes a descriptive number, the value being an indicator of the size of the containment area (e.g., RNP-0.3, RNP-1, RNP-3, etc.). The different values are assigned to terminal, departure, and enroute operations. Some aircraft have RNP approval in their AFM without a GPS sensor. The lowest level of sensors that the FAA will support for RNP service is DME/DME. However, necessary DME signal may not be available at the airport of intended operations. For those locations having an RNAV chart published with LNAV/VNAV minimums, a procedure note may be provided such as "DME/DME RNP-0.3 NA." This means that RNP aircraft dependent on DME/DME to achieve RNP-0.3 are not authorized to conduct this approach. Where DME facility availability is a factor, the note may read "DME/DME RNP-0.3 authorized; ABC and XYZ required." This means that ABC and XYZ facilities have been determined by flight inspection to be required in the navigation solution to assure RNP-0.3. VOR/DME updating must not be used for approach procedures.
source: ICAO Aviation Chart Glossary

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