Originally Posted by
DCThumb
The key is 'supposed to'. The CAA seem to have taken the surprisingly pragmatic view that the more precise signal is available and useable, and that if you fly that GP to LNAV/VNAV minima then there are no safety concerns.
That's not right. The CAA haven't taken a pragmatic view it's the regulations that changed. ICAO have decided that all LNAV/VNAV can be flown with SBAS for vertical guidance - it's fine, seriously. Go read PANS OPS and CS-ACNS.