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
Procurement programme of the Royal Australian Navy least 24 new helicopters by 2014. In June 2011 the Australian government announced the purchase of 24 MH-60R "Romeo" Seahawk helicopters as a replacement for the S-70-B2. A full listing of all current Projects is available at the Defence Materiel Organisation website. Procurement programme of the Royal Australian Navy The Royal Australian Navy, although a significant force in the Asia-Pacific region, is nonetheless classed as a medium-sized navy. Its fleet is based around two main types of surface combatant, with limited global deployment and air power capability. However, in 2009, a white paper, "", was produced by the Australian government