[3] In 1909, following restructuring within the Admiralty, both the Mobilisation and War Divisions of the Naval Intelligence Department were brought together to create a separate Naval Mobilisation Department however this department existed only for a period of three years.

[5] In 1918 the Mobilisation Division of the Admiralty Naval Staff itself was dissolved and the Mobilisation Department was re-stablished once again but not under the control of the Naval Staff instead it was responsible to the Office of the Second Sea Lord[6] this lasted until 1932 when it was replaced by a new Department of the Director of Manning that was itself a subsidiary department of the Second Sea Lord it continued to exist until 1964 when the Admiralty Department itself was abolished.

Directors of Naval Mobilisation, 1909-1912 Directors of Naval Mobilisation, 1918-1932 [8] Assistant Directors of Naval Mobilisation, 1909-1912 Heads of Manning Division, 1909-1912 Heads of War Division, 1909-1912 Assistant Directors of Naval Mobilisation, 1918-1932[9] As of 1911: Distribution of work between the departments two divisions various sections can be seen in more detail below they included:[10][11] Manning Division War Division Orders for War issued by the Admiralty and by Commanders-in-Chief.

Questions relating to Fleet Coaling Service in War and Manœuvres, Supply of Oil Fuel, Wireless Telegraphy, Examination Service and Traffic Regulations, and Joint Naval and Military Operations, Preparation of Annual Statement of Coal and Oil Fuel requirements of the War Fleets with resources and proposed methods of supply, War Signal Stations and Coast Guard Stations.

Primary source for this article is by Harley Simon, Lovell Tony, (2015), Naval Mobilisation Department (Royal Navy), dreadnoughtproject.org, http://www.dreadnoughtproject.org.