Well from our newly updated operations manual :
RNAV (GNSS) APPROACHES
Definition : non-precision approaches with LNAV or LNAV/VNAV minima.
- "RNAV (GNSS) approaches" corresponds to "RNP APCH operations"
- "RNAV (RNP) approaches" corresponds to "RNP AR APCH operations"
RNP AR OPERATIONS
General
Required navigation performance instrument approach procedures with authorisation required (RNP AR) are charted as RNAV (RNP) RWY XX " and contain a special note on the chart to aircrew and operators. These procedures are commonly referred to as "RNP AR" or in the USA "RNP SAAAR".