Thanks for all the replies... Good to see that I am not the only one who thinks this might be an issue. I currently fly with Lido charts, and there is a clear distinction between RNAV (GNSS), RNAV (GPS) and RNAV (RNP)... The RNP approaches, such as LOWI 26, LOWS 33, KDCA 19/01 all carry extra remarks that authorization is required and an RNP value of 0.15 or 0.3 is given. This is obviously not the case for the non-RNP RNAV approaches at the same airport ( LOWS 15, KDCA 33... etc). Ipso facto any aircraft capable of and certified for RNAV (be it a GPS installation in a Seneca or an FMS aircraft) should be able to fly the regular RNAV (GNSS/GPS) approach. I have not been able to find any regulations to the contrary in Doc 8168 or EU-OPS...
