The Admiralty Naval Staff 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. It was replaced by the Ministry of Defence (Naval Staff) as part of the Ministry of Defence Navy Department. History and development In December 1916 Admiral Sir John Jellicoe was appointed Admiral of the Fleet and First Sea Lord he would oversee the expansion of the Naval Staff at the Admiralty and the introduction of convoys, In April, 1917 the Admiralty War Staff function was abolished and replaced by a new Admiralty Naval Staff department and Jellicoe was also given the additional title of Chief of the Naval Staff he was assisted initially by two deputies, the Deputy Chief of the Naval Staff and the Assistant Chief of the Naval Staff, these would be joined later by the Deputy First Sea Lord and Vice Chief of the Naval Staff, Jellicoe was relieved at the end of 1917. Changes in the structure of the Staff were implemented from 1918 onward during the interwar period some of the divisions were wound down in peace time but would be re-established with the advent of the Second World War. After the war the divisions were once again downsized. Duties The term 'Naval Staff' does not mean all Naval Officers serving in the former Admiralty Department, it means the divisions that are responsible under the Office of the Chief of Naval Staff and including his deputy, vice and assistant chiefs of the staff for the formulation of naval strategy including strategic planning, conduct of operations, implementation of naval policy, application of tactical doctrines, the collection and dissemination of intelligence and for stating the broad naval requirements, including the quantities and specification of ships, naval aircraft, armament and equipment the Naval Staff also included some civilian members. Admiralty departments The admiralty divisions should be not confused with its departments which were distinct and separate from the function of the naval staff in that they were superintended by the offices of the various Sea Lords responsible for them and were primarily administrative and logistical support bodies. Members of the naval staff Board of Admiralty member (*) First Sea Lord and Chief of the Naval Staff * Deputy First Sea Lord * Deputy Chief of the Naval Staff * Vice Chief of