Assistant Chief of the Naval Staff (Royal Navy)
From The Dreadnought Project
The Assistant Chief of the Naval Staff (A.C.N.S.) was a Lord Commissioner of the Admiralty and member of the Board of Admiralty responsible to the First Sea Lord for trade protection at the end of the First World War.
Vice-Admiral Sir Alexander L. Duff, 31 May, 1917 – 23 July, 1919.