area navigation (RNAV)
Area navigation based on performance requirements for aircraft operating along an ATS route, on an instrument approach procedure or in a designated airspace.
ICAO, Official term and definition added to AN 3 by Amdt 75 (2010), AN 4 by Amdt 55 (2009), AN 6/I by Amdt 32 (20/07/2008), An 6/II by Amdt 27 (20/07/2008), AN 6/III by Amdt 13 (20/07/2008), AN 10/I by Amdt 83 (20/07/2008), AN 11 by Amdt 46 (20/07/2008) and to AN 15 by Amdt 35 (2009)
Performance requirements are expressed in navigation specifications (RNAV specification, RNP specification) in terms of accuracy, integrity, continuity, availability and functionality needed for the proposed operation in the context of a particular airspace concept. (Note source:ICAO)
Lexicon Release 2015.2