The terms BRNAV and PRNAV are essentially confined to Europe. BRNAV = RNP 5, PRNAV = RNP1.0. (The values are in NM). Terminal operations are RNP1.0 or less. NPA are RNP 0.5 or less (0.3 is the lowest).
Most modern commercial air transport avionic fits will be RNP certified at installation (and many are RNP 0.1 or less)...