Mixed navigation environment
urn:aero:airm:1.0.0:ContextualModel:ATMBusinessTerms:Mixed_navigation_environment
An environment where different navigation specifications may be applied within the same airspace (e.g. RNP 10 routes and RNP 4 routes in the same airspace) or where operations using conventional navigation are allowed in the same airspace with RNAV or RNP applications.
Source:
ICAO