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
Regimental Sergeant Major of the Army (Australia) the Army, the RSM-A is responsible to the Chief of Army (CA). The appointment is the equivalent of the Warrant Officer of the Navy (WO-N) in the Royal Australian Navy, and the Warrant Officer of the Air Force (WOFF-AF) in the Royal Australian Air Force. The post was created by the then Chief of Army, Lieutenant General Sir Phillip Bennett. Regimental Sergeant Major of the Army (Australia) Regimental Sergeant Major of the Army (RSM-A) is the most senior Warrant Officer in the Australian Army. It is a singular appointment – it is only held by one person at any time.