Area navigation(R-NAV) based on performance requirements for aircraft operating along an ATS route, on an instrument approach procedure or in a designated airspace. The performance-based navigation (PBN) concept specifies that aircraft RNAV system performance requirements be defined in terms of accuracy, integrity, availability, continuity and functionality required for the proposed operations in the context of a particular airspace concept, when supported by the appropriate navigation infrastructure. In that context, the PBN concept represents a shift from sensor-based to performance-based navigation. 

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