Air commodore is never shortened to Commodore, which is a rank in various naval forces. Air commodore is a one-star rank and the most junior air officer rank, being immediately senior to group captain and immediately subordinate to air vice-marshal. It has a NATO ranking code of OF-6 and is equivalent to a commodore in the Royal Navy or a brigadier in the British Army or the Royal Marines. Unlike these two ranks, however, it has always been a substantive rank. Additionally, air commodores have always been considered to be air officers whilst Royal Navy commodores have not since the Napoleonic Wars
History of the Royal Australian Navy s, all to be built in America; in 1980 they announced an additional two vessels both to be built in Australia. The fifteen Australian-built vessels of the made up Australia's patrol boat from 1979 to 2007; they have now been replaced by the fourteen s. The is the newest class of Australian submarines, built in Australia for the Royal Australian Navy. They were constructed by the Australian Submarine Corporation in Adelaide, South Australia, and replace the six s in the Australian fleet. The first vessel, , was laid down in 1990 and commissioned in 1996, with all six vessels of