The idea of using an ILS overlay to fly an NPA is certainly creative
I would certainly doubt that CASA would go out on a limb and endorse such a procedure
It would appear that CASA have approved exactly that!
Using the aircraft's GPS capability to fly a NDB approach. How novel!
If only the
USAF Boeing 737-200 at Dubrovnik had a GPS/FMS or a 2nd ADF!