Admiralty
It evolved from *Admiralty Navy War Council, (1909–1912) which in turn became the Admiralty War Staff, (1912–1917) before finally becoming the Admiralty Naval Staff in 1917. It was the former senior command, operational planning, policy and strategy department within the British Admiralty. It was established in 1917 and existed until 1964 when the department of the Admiralty was abolished, and the staff departments function continued within the Navy Department of the Ministry of Defence until 1971 when its functions became part of the new Naval Staff, Navy Department of the Ministry of Defence.
Royal Australian Navy
The Commonwealth Naval Forces were established on 1 March 1901, two months after the federation of Australia, when the naval forces of the separate Australian colonies were amalgamated. A period of uncertainty followed as the policy makers sought to determine the newly established force's requirements and purpose, with the debate focusing upon whether Australia's naval force would be structured mainly for local defence or whether it would be designed to serve as a fleet unit within a larger imperial force, controlled centrally by the British Admiralty. In 1908–09, the decision was made to pursue a compromise solution, and the Australian government agreed to establish a force that would be used for local defence but which would be capable of forming a fleet unit within the imperial naval strategy, albeit without central control. As a result, the navy's force structure was set at "one battlecruiser, three light cruisers, six destroyers and three submarines".