M609, certainly onshore. My last operation introduced RNP0.3 LNAV/VNAV Aproaches to what had been a day VFR only heliport, just before I left.
I think,
212man, that it should be made clear to M609 that that "last operation" was not in Europe.
I also think your enthusiasm for CDFA doesn't take account of helicopters (or aircraft generally) which can't generate a pseudo glidepath. As you know, CDFA provides for "nominal vertical guidance", which can be no more than the standard ALT vs DME table - and therefore wouldn't have provided any extra protection to the accident we're discussing.