It might say BRNAV and RNP5, not sure I'll check it when i'm home. Definitely not RNP 1. Equipment i'm using is a GNS430W.
As far as i'm aware in the US, the equipment gets certified and that certification is valid to all aircraft the equipment is installed in.
In Europe however every aircraft+equipment needs to be certified. More certification in example RNP1 = more €€€, so not every GNS430W/G1000 has the same certification. (please correct me if i'm wrong)
So basically, when for example a POH says RNP 1 capability it can be used as primary navigation for conventional procedures (with backup of course) for all phases of flight u said without further mentioning in the POH.
Can it ever allow you to fly (lateral aspect) of a VOR or ADF approach?