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
Uniforms of the Royal Navy junior ratings in this rig. This is the same as for Officer's No. 3 dress but with the relevant rate insignia and seaman's cap (or beret). Junior rates are only issued with short-sleeve shirts and are not issued with ties. This is divided into 3B (without jersey) and 3C dress (navy-blue jersey worn over the shirt with the shirt collar out). There is no equivalent of 3A dress for junior ratings. Junior ratings, in common with all ranks and rates of the Royal Navy, are currently (2015) in the middle of the process of being issued the new No4. RNPCS