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 Volunteer Cadet Corps as well as modern uniforms of Trinity House, the Royal Australian Navy, the Royal New Zealand Navy and Royal Malaysian Navy are virtually identical to RN uniforms, with the exception of flashes at shoulder height and on rank slides. Royal Canadian Navy uniforms are also very similar, though the traditional sailor suit is no longer used and some distinctly Canadian rank insignia and titles are used; i.e., master seaman. Uniform regulations for officers were first issued by Lord Anson in 1748, and remained unchanged for nearly twenty years. Reportedly, the officers themselves advocated its adoption, as they