Assistant Chief of the Naval Staff
| Assistant Chief of the Naval Staff | |
|---|---|
Ensign of the Royal Navy
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| Ministry of Defence | |
| Member of | Admiralty Board, Navy Board |
| Reports to | Fleet Commander |
| Nominator | Secretary of State for Defence |
| Appointer |
Prime Minister Subject to formal approval by the Queen-in-Council |
| Term length | Not fixed (typically 1–3 years) |
| Inaugural holder | Alexander Ludovic Duff |
| Formation | 1917 |
The Assistant Chief of the Naval Staff (A.C.N.S.) is a senior appointment in the Royal Navy usually a two-star rank and has a NATO ranking code of OF-7.
The Assistant Chief of the Naval Staff was originally directly responsible to the First Sea Lord for non-operational divisions of the Naval Staff, and held a position on the Board of Admiralty. The position was created in 1917 as one of two deputies with Board Status to whom the First Sea Lord delegated responsibility for the running of the Naval Staff. The position still exists today on the Admiralty Board which directs the Royal Navy.
Rear-Admiral Alexander L. Duff was appointed the first Assistant Chief of Naval Staff on 31 May 1917. The duties of the Assistant Chief of Naval Staff, shared with the First Sea Lord and Chief of Naval Staff and the Deputy Chief of Naval Staff. .
The Assistant Chief of Naval Staff Continued in this capacity until 1941 when the office of the Vice Chief of Naval Staff was created they then supported that flag officer until 1985 when that post was abolished. During World war Two the combined responsibilities of the Assistant Chief Naval Staff were divided up with the creation of new Assistant Chief's of the Naval Staff responsible for specific areas such as Home (Waters) and Foreign Commands, Trade, Operations and Air. However the ACNS remained responsible for Policy.
Additional Assistant Chief's of Naval Staff
New Additional Assistant Chief's of Naval Staff were created for Warfare from 1953 to 1968 that was changed to Assistant Chief Naval Staff — Operational Requirements until 1985. The second world war post of Assistant Chief Naval Staff — Operations was revived in 1966 until 1968 then it was changed to Assistant Chief Naval Staff — Operations and Air until 1984.
In April 2012 Rear Admiral Matthew Parr's post as Assistant Chief of the Naval Staff was re-designated Assistant Chief of the Naval Staff (Policy) and the former Chiefs of Staff responsible for Capability, Support, Aviation & Carriers and Personnel were also re-designated Assistant Chiefs of the Naval Staff.
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