Australia has no aircraft carriers?
Nope, we flogged her off to China for scrap in 1982. Name was HMAS Melbourne. Was going to be replaced by another second hand British job but that got tangled up in the Falklands war and so we ended up without a carrier. Pretty sad for the poor navy aviators, had to operate from HMAS Albatross (Navy land base). From Wiki;
HMAS Melbourne (R21) was a Majestic-class light aircraft carrier of the Royal Australian Navy (RAN). Operating from 1955 until 1982, she was the third and final conventional aircraft carrier(I) to serve in the RAN. Melbourne was the only British Commonwealth naval vessel to sink two friendly warships in peacetime collisions. More here;
http://en.wikipedia.org/wiki/HMAS_Melbourne_(R21)
