Heliringer
Overpitch is very correct about his posting except NAH is no longer at the Gorge (Katherine). Last time I was in Oz (94) the Gorge contract had been awarded to another Katherine Operator with R44's. I think Helimuster may still use one at their Katherine road pad. Far North Helicopters in Darwin has one as well albeit not in full operation I think.
It's a shame operators are going away from B47 and KH4, but it is getting harder to get parts, and pilots that can fly them properly. It is a great flying machine but as mentioned before, you must love greasing it every 10 hours eheh
R44 's our days, is a better endorsement if you wish to pursue tourism flying in OZ, to clock up your hours.
Cheers
