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Aviation Glossary :: Required Navigation Performance  Aviation Glossary :: Required Navigation Performance FAA Written Test Preparation
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At Dauntless, our editorial staff maintains the web's largest unified glossary of aviation terms. This glossary is built from a combination of official, quasi-official, and proprietary sources (including original material that we develop oursselves). Uniquely, we often provide multiple definitions of a given term so that you can find that which best applies to you. In order to maximize your learning efficiency, this glossary (and similar ones for our international users) is incresingly fully integrated into our aviation learning apps, including our FAA written test prep and FAA practical test prep software and apps. If you like this glossary, you'll love them with their polished learning environments and world's best and clearest content (please do give them a try.).

Required Navigation Performance
Required Navigation Performance
RNP is a statement of the navigation performance necessary for operation within a defined airspace. On-board monitoring and alerting is required.
source: FAA Instrument Procedures Handbook (FAA-H-8083-16)
A statement of the navigational performance necessary for operation within a defined airspace. The following terms are commonly associated with RNP:
  1. Required Navigation Performance Level or Type (RNP-X). A value, in nautical miles (NM), from the intended horizontal position within which an aircraft would be at least 95-percent of the total flying time.
  2. Required Navigation Performance (RNP) Airspace. A generic term designating airspace, route (s), leg (s), operation (s), or procedure (s) where minimum required navigational performance (RNP) have been established.
  3. Actual Navigation Performance (ANP). A measure of the current estimated navigational performance. Also referred to as Estimated Position Error (EPE).
  4. Estimated Position Error (EPE). A measure of the current estimated navigational performance. Also referred to as Actual Navigation Performance (ANP).
  5. Lateral Navigation (LNAV). A function of area navigation (RNAV) equipment which calculates, displays, and provides lateral guidance to a profile or path.
  6. Vertical Navigation (VNAV). A function of area navigation (RNAV) equipment which calculates, displays, and provides vertical guidance to a profile or path.
source: FAA Pilot/Controller Glossary
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)

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