BOAC:
Discussion of RNAV 'criteria' is all well and good if relevant. What about an approach NOT using the 'box'? Do we know? What then? Good old 'airmanship', eh?
There are no RNAV procedures
per se for the airport.
The ILS IAP in question (Runway 30) can be flown using LNAV from the en route environment, through the applicable STAR, to the FAF, at which point the ILS must be used. "New airmanship" requires RNAV (LNAV) be used in this manner with a modern AB or Boeing.
I would load all the charts if this forum software made such easy like other fora.