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
Commodore (rank) embarked aboard when they are the senior officer present afloat (SOPA). In the Argentine Navy, the position of commodore was created in the late 1990s, and is usually, but not always, issued to senior captains holding rear-admirals' positions. It is not a rank but a distinction and, as such, can be issued by the chief of staff without congressional approval. Its equivalents are colonel-major in the Army and commodore-major in the Air Force. It is usually—but incorrectly—referred to as "navy commodore", to avoid confusion with the "air force commodore", which is equivalent to the navy's captain and army's colonel. The