What about IMC? Can you glide an RNAV or similar approach when it's dark and stormy?
This is why we have the cloud-break. 1:1 descent profile is designed to avoid the rocks at most places in oz. The normal glide is maintained until 7nm then point it at the field. Altitude alert set at 1200agl and radalt set at 700' - level off height. Puts you near vne - then circling approach if visual. If not, gear, flap, bring it down at 80kt, try to miss obstacles and nail the 64kt stall onto the deck. Easier said than done.
I like the sound of the RNAV option too.