Dr.
For ICAO (and AUS) RNP APCH and RNAV (GPS) are the same.
RNP APCH is the general ICAO designator for PBN approach procedures that are not Authorization Required operations.
As GNSS fulfils the basic requirement of RNP for on-board performance and monitoring, both RNAV (GNSS) and SBAS LPV procedures are types of RNP APCH operations.
RNP APCH procedures will be identified as:
• RNP APCH – LNAV
• RNP APCH – LNAV/VNAV (where a vertical guidance system is used)
• RNP APCH – LPV (Localiser Performance with Vertical Guidance)
• RNP APCH – LP (SBAS approach where vertical guidance is not available)