Commodore (Royal Navy) Commodore (Royal Navy) Commodore (Cdre) is a rank of the Royal Navy above captain and below rear admiral. It has a NATO ranking code of OF-6. The rank is equivalent to brigadier in the British Army and Royal Marines and to air commodore in the Royal Air Force. The rank of commodore was introduced during the 17th century in November 1674 (though not legally established until 1806). In 1684 the navy introduced two classes of commodore, the first known as a "Commodore Distinction" and the other a "Commodore Ordinary"; these would later evolve into commodores first and second class. In
Structure of the Royal Navy in 1989 and supplies via replenishment at sea. It also transported Army and Royal Marine personnel. RFA vessels were commanded and crewed by civilians, augmented with regular and reserve Royal Navy personnel to perform specialised military functions such as operating and maintaining helicopters or providing hospital facilities. RFA ships carried the ship prefix "RFA". The following is a list of RFA ships in 1989: The Royal Naval Auxiliary Service (RNXS) was a uniformed, unarmed, civilian volunteer service, administered and trained by the Royal Navy to operate in the ports and anchorages of the UK in an Emergency. The Service was divided into