Admiral is the highest active rank of the Royal Australian Navy and was created as a direct equivalent of the British naval rank of admiral. It is a four-star rank. Since 1968, generally the only time the rank is held is when the Chief of the Defence Force is a navy officer.

Admiral Michael Wyndham "Mike" Hudson was a senior officer in the Royal Australian Navy (RAN), particularly notable for playing an important role in the introduction of the Collins class submarines and Anzac Class frigates, and establishing two-ocean basing for ships of the RAN during his tenure as Chief of Naval Staff from 1985 to 1991.