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
Structure of the British Army Structure of the British Army The structure of the British Army is broadly similar to that of the Royal Navy and Royal Air Force, in that the four-star (general-equivalent) field commands have been eliminated. Army Headquarters is located in Andover, Hampshire. As the top-level budget holder, this organisation is responsible for providing forces at operational readiness for employment by the Permanent Joint Headquarters. There is a Commander Field Army and a personnel and UK operations command, Home Command. The command structure is hierarchical with divisions and brigades controlling groupings of units from an administrative perspective. Major Units are regiment or