Originally Posted by
Barronflyer
Hi there
Can someone please advise that an RNAV (GNSS) approach requires a working GPS in all cases? I.e. with failed GPS receivers the approach cannot be flown with reference to RADIO UPDATING, INERTIAL pos etc. Silly question I know. Just trying to confirm my assumption.
Thanks
There are approaches which are labelled as RNAV (VOR DME) or RNAV (DME DME), although they seem to be very rare.
There are some of them in Egypt like in Sharm El Sheikh (HESH): RNAV (VOR DME) 22L and 22R.
(Other airports that have them are HELX, HEAX, HESN, ...)
This RNAV approach is based on an RNAV system that doesn't need GPS, but only VOR DME position updating. I believe you still need the 0.3 RNP.
However, in the FCOM of my aircraft, it is written that for any RNAV approach which doesn't require a GPS (like the RNAV(VOR DME)), you need to apply the procedures for a RNAV(GPS) approach. Hence you need a working GPS. (However, that might be a company requirement.)