There could be some interesting permutations to this.Four AORs for the RAN? That is la la land, where is the budget and manpower going to come from to own and operate 4 x AOR's?
How is the RAN going to employ 4 x AOR's? Even if the RAN ends up with three 'pure' AOR's I would imagine that we would only ever see two in operation at any one time with two crews swapping from one to the other.
And yes of course the new RNZN AOR will be a sovereign NZ capability, but I'm sure having a total of three AOR's either side of the ditch will be worked out by both our Governments for the benefit of all.
I think you missed the point of what I actually said too, I said do we really need a 3rd 'pure' AOR.
A ship like the Karel Doorman would be a better solution, in my opinion, yes it can operate as an AOR (when required), but primarily I would see a greater need for an additional LPD/LSD capability for when Choules (or her future eventual replacement) is not available.
I don't think the RAN would want to go with an orphan ship class. That would seem to go against its recent efforts to consolidate its hull types as much as possible.
So to my mind it would likely want to go with either a third Cantabria class or a ship based on the Bay class.
Of course there is also a possibility that they could go for an entirely new class and perhaps use that to eventually replace the Choules as well.