First Sea Lord
The office of Controller would be re-established to deal with all questions relating to supply; on 6 September 1917, a Deputy First Sea Lord, was added to the Board who would administer operations abroad and deal with questions of foreign policy. In October 1917, the development of the staff was carried one step further by the creation of two sub-committees of the Board—the Operations Committee and the Maintenance Committee. The First Lord of the Admiralty was chairman of both committees, and the Operations Committee consisted of the First Sea Lord and Chief of Naval Staff, the Deputy First Sea Lord, Assistant Chief of Naval Staff, and Fifth Sea Lord. The Maintenance Committee consisted of the Deputy First Sea Lord (representing the operations committee), Second Sea Lord (personnel), Third Sea Lord (materiel), Fourth Sea Lord (transport and stores), Civil Lord, Controller and Financial Secretary.