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 required coordination between the invasion fleet and the Spanish army on shore. But the poor design of the Spanish cannons meant they were much slower in reloading in a close-range battle, allowing England to take control. Spain and France still had stronger fleets, but England was catching up. The Royal Scots Navy (or Old Scots Navy) was the navy of the Kingdom of Scotland until its merger with the Kingdom of England's Royal Navy in 1707 as a consequence of the Treaty of Union and the Acts of Union that ratified it. From 1603 until 1707, the Royal Scots Navy