Originally Posted by
gipsymagpie
You are confusing what has been lost here. It’s the SoL service we have lost (LPV only) not SBAS. You can absolutely still use this as it is part of the Open (free) part of EGNOS. LNAV/VNAV in most light aircraft has only ever been based on SBAS Open Service and never the SoL. I know we are not seeing the Baro VNAV as it is highly unlikely to be fitted to non-airliners. The LPV and LNAV/VNAV are the exact same flight path in the sky. PANS OPS, the ICAO spec for approaches, CS-ACNS the certification spec for navigation equipment and the appropriate information in the older AC-20 all highlight that any LNAV/VNAV certified for VNAV Baro may be flown with VNAV SBAS (and checked via NATS and the CAA).
So provided you fly to the LNAV/VNAV minima not the LPV minima you are perfectly legal even if your navigation equipment says LPV (that’s just a prioritisation logic). I understand why you might think that from the archaic information pushed out by the CAA in their latest CAP but some reading around the topic will confirm everything outlined above.
LNAV/VNAV may be flown with SBAS VNAV - fact - see CS-ACNS
Only LPV minima have been NOTAMed as unavailable - fact
Therefore you can fly LNAV/VNAV using SBAS where the minima are shown. The anomaly that your particular nag kit shows LPV will be remedied in the next AIRAC.
Not knowing how your airplane works on most of the airplanes I’ve flown you have to download the approach from the database. As soon as you download a LNAV/VNAV approach it will load this approach and will use a BARO calculated VNAV path and not an SBAS glide path. It will use a more accurate GPS position for determining the position of your plane but the VNAV path and the SBAS path are two entirely different path systems. with the BARO VNAV the GS beam is straight and a dot deviation at 6 miles will be the same as a dot deviation at 0,5 NM from the runway. The LPV glide path will get more sensitive as it gets closer to the runway. In short, UK doesn’t have LPV capability and an LNAV/VNAV approach is not the same as an LPV approach.