It was one of the harder pub quiz question ie which is the only capital city that the Red Arrows couldn't display at ? Ans Wellington -of course the use of a boat etc would make it possible but the question is aimed at the range of the Hawk. A quick look at great circle planner puts the range from the closest mainland Australian airfield to the nearest NZ one as about 1100 nm. Even if it was possible one way , the wind component would preclude the recovery. Doesn't matter if it 3 or 9/10 ac it is just too far unless as stated above the drop tank fit becomes an option.