Mobilisation Division

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Mobilisation Division
Board of Admiralty Flag 20th Century.png
Agency overview
Formed8 January 1912
Preceding agency
Dissolved12 January 1918
Superseding department
JurisdictionUnited Kingdom United Kingdom
HeadquartersAdmiralty Building
Parent departmentDepartment of Admiralty

The Mobilisation Division [1] was a staff division of the Admiralty War Staff, then later Admiralty Naval Staff responsible for mobilisation requirements, manning and war preparation planning from 1912-1918.


The Mobilisation Division was established on 8 January 1912 [2] it evolved out of the Naval Mobilisation Department of the Admiralty and was part of both the Admiralty War Staff and Admiralty Naval Staff departments. Mobilisation ceased to be a Naval Staff division on 12 January 1918 [3] when it was re-designated an admiralty department that would now report to the Office of the Second Sea Lord until 1932.

The division was responsible for the mobilisation of active personnel, in addition to securing crews for all commissioned vessels including those in reserve. It also had to plan for and arrange the requisition of merchant vessels for the purpose of auxiliary purposes. It was also responsible for liaising with various mobilisation (naval employment offices) present all ports to process drafted conscripts. Other duties included the planning and projecting all manning requirements and securing available resources to meet those plans. During world war one in addition to its other duties, the Mobilisation Division was also charged with the responsibility for the supplying the fleet with fuel, from the Naval War Staff point of view.

Director of Mobilisation Division


Directors duties

As of 1917:

  • All points connected with mobilisation which are dealt with by members of the Board, are in the first instance to be referred to them for their consideration.
  • To prepare and keep correct to date, a complete all plans for mobilising the Naval forces of the Empire with the utmost possible rapidity, and with the least strain on the Admiralty.
  • To keep Commanders-in-Chief and Commanding Officers supplied, as may be directed, with all such important information as shall be considered by the Board likely to be of use in war.

Assistant Director of Mobilisation Division


  • Captain John W. L. McClintock, January 1912 - April 1914.
  • Captain Geoffrey Hopwood, May 1914 - April 1916.

Division Sub Sections

A more detailed breakdown of the distribution of work allocated within the division to the various staff sections can be seen below.

As of 1917:[9]




  1. Lambert, Nicholas A. (2002). Sir John Fisher's Naval Revolution:Abbreviations. Univ of South Carolina Press. p. XV. ISBN 9781570034923.
  2. Kennedy, Paul (24 April 2014). The War Plans of the Great Powers (RLE The First World War): 1880-1914. Routledge. p. 128. ISBN 9781317702528.
  3. Black, Nicholas (2009). The British naval staff in the First World War (1. publ., transferred to digital pr. ed.). Woodbridge: Boydell Press. p. 155. ISBN 9781843834427.
  4. Mackie, Colin. "Senior Royal Navy Appointments from 1865" (PDF). Gulabin, p.49, January 2030. Retrieved 28 February 2020.
  5. Archives, The National. "Duff Service Record". National Archives, ADM 196/43, f80. Retrieved 22 February 2017.
  6. Archives, The National. "Sinclair Service Record". National Archives, ADM 196/43, f368. Retrieved 22 February 2017.
  7. Archives, The National. "Culme-Seymour Service Record". National Archives, ADM 196/43, f477. Retrieved 22 February 2017.
  8. "British Military lists : Navy lists,1913 to 1921, 1944-1945". National Library of Scotland. p. 582. Retrieved 28 February 2020.
  9. Marder, Arthur J. (31 March 2014). From the Dreadnought to Scapa Flow: Volume IV 1917, Year of Crisis. Seaforth Publishing. p. 222. ISBN 9781848322011.