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 civilian fashions of the time. Frock Coat Dress was (like Full Dress) placed in abeyance and 'landed' in 1939, and although not formally abolished was not worn until it was finally abolished in 1949. A modified version of this uniform is still worn; usually with peaked cap and without epaulettes, by the Master and Elder Brethren of Trinity House. This was not introduced until comparatively late in World War Two, in contrast to its Army and RAF equivalents. From 1941, Army battledress was approved for use by Royal Navy personnel until 1943, when a Navy Blue version of battledress was