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 Navy to launch aircraft with landings in the sea. The first purpose-built aircraft carrier was HMS "Argus", launched in 1918. The Royal Navy was also heavily committed in the Dardanelles Campaign against the Ottoman Empire. During the war, the Navy contributed the Royal Naval Division to the land forces of the New Army. The Royal Marines took part in many operations including the raid on Zeebrugge. Energy was a critical factor for the British war effort. Most of the energy supplies came from coal mines in Britain. Critical however was the flow of oil for ships, lorries and industrial use. There