This page is intended to give an overview of Royal Navy officer ranks in World War I, and the three major changes that occurred in those years. For more specific details, including cap insignia and shoulder straps, please see Royal Navy Officer Insignia of World War I, by Branch. For the insignia of reserve officers, please see Royal Navy Reserve and Volunteer Reserve Insignia of World War I.
NOTE: The rank of Lieutenant-Commander was created effective April 1, 1914, in place of the former Lieutenant of eight years seniority.
Military Branch |
10 years seniority |
under 10 years seniority |
Admiral of the Fleet | Admiral | Vice-Admiral | Rear-Admiral, Commodore 1st Class |
Commodore 2nd Class | Captain | Commander | Lieutenant-Commander | Lieutenant | Sub-Lieutenant, Mate |
Chief Boatswain, Chief Gunner, Commissioned Telegraphist | Boatswain, Gunner, Warrant Telegraphist |
Engineering Branch |
10 years seniority |
under 10 years seniority |
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Engineer Vice-Admiral | Engineer Rear-Admiral | Engineer Captain | Engineer Commander | Engineer Lieutenant-Commander | Engineer Lieutenant | Engineer Sub-Lieutenant, Mate (E) | Chief Artificer Engineer, Commissioned Mechanician |
Artificer Engineer, Warrant Mechanician |
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Medical Branch |
10 years seniority |
under 10 years seniority | |||||||||||
Medical Director-General | Surgeon-General | Deputy Surgeon-General | Fleet Surgeon | Staff Surgeon | Surgeon | Head Wardmaster |
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Accountant Branch |
10 years seniority |
under 10 years seniority |
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Paymaster-in-Chief, Secretary to an Admiral of the Fleet, Secretary to a Commander-in-Chief (5 years in rank) |
Fleet Paymaster, Secretary to a Commander-in-Chief (under 5 years in rank) |
Staff Paymaster, Paymaster, Secretary to Flag Officer, Commodore 1st Class or Captain of the Fleet |
Assistant Paymaster of 4 years seniority, Secretary to a Commodore 2nd Class |
Assistant Paymaster | Warrant Writer, Head Steward, Instructor in Cookery |
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Naval Instructor Branch |
10 years seniority |
under 10 years seniority |
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Naval Instructor of 15 years seniority | Naval Instructor of 8 years seniority | Naval Instructor under 8 years seniority | Chief Schoolmaster | Head Schoolmaster |
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Artisan Branch (Warrant officers or commissioned from warrant rank) |
10 years seniority |
under 10 years seniority |
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Carpenter Lieutenant-Commander | Carpenter Lieutenant | Chief Carpenter, Commissioned Electrician |
Carpenter, Warrant Electrician, Warrant Armourer |
On January 1, 1915, an Order in Council merged the Engineering Branch into the Military Branch. Though engineer officers kept their rank titles and the purple branch distinction cloth, their uniforms and insignia otherwise became the same as other Military Branch officers, with the "executive curl," silver and gold cap badges, and oak leaves on the cap peak.
Military Branch | 10 years seniority |
under 10 years seniority |
Admiral of the Fleet | Admiral | Vice-Admiral | Rear-Admiral, Commodore 1st Class |
Commodore 2nd Class | Captain | Commander | Lieutenant-Commander | Lieutenant | Sub-Lieutenant, Mate |
Chief Boatswain, Chief Gunner, Commissioned Telegraphist | Boatswain, Gunner, Warrant Telegraphist |
10 years seniority |
under 10 years seniority |
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Engineer Vice-Admiral | Engineer Rear-Admiral | Engineer Captain | Engineer Commander | Engineer Lieutenant-Commander | Engineer Lieutenant | Engineer Sub-Lieutenant, Mate (E) | Chief Artificer Engineer, Commissioned Mechanician |
Artificer Engineer, Warrant Mechanician |
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Medical Branch |
10 years seniority |
under 10 years seniority | |||||||||||
Medical Director-General | Surgeon-General | Deputy Surgeon-General | Fleet Surgeon | Staff Surgeon | Surgeon | Head Wardmaster |
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Accountant Branch |
10 years seniority |
under 10 years seniority |
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Paymaster-in-Chief, Secretary to an Admiral of the Fleet, Secretary to a Commander-in-Chief (5 years in rank) |
Fleet Paymaster, Secretary to a Commander-in-Chief (under 5 years in rank) |
Staff Paymaster, Paymaster, Secretary to Flag Officer, Commodore 1st Class or Captain of the Fleet |
Assistant Paymaster of 4 years seniority, Secretary to a Commodore 2nd Class |
Assistant Paymaster | Warrant Writer, Head Steward, Instructor in Cookery |
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Naval Instructor Branch |
10 years seniority |
under 10 years seniority |
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Naval Instructor of 15 years seniority | Naval Instructor of 8 years seniority | Naval Instructor under 8 years seniority | Chief Schoolmaster | Head Schoolmaster |
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Artisan Branch (Warrant officers or commissioned from warrant rank) |
10 years seniority |
under 10 years seniority |
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Carpenter Lieutenant-Commander | Carpenter Lieutenant | Chief Carpenter, Commissioned Electrician |
Carpenter, Warrant Electrician, Warrant Armourer |
As the war neared its end in 1918, major reforms were made concerning the Royal Navy's officers and their uniforms. The civil branches were given "military" titles, Fleet Surgeon becoming Surgeon-Commander and so on. The curl was added to the rank stripes of all officers, and cap devices and peaks were standardized to the "military" pattern. Warrant officers lost their cuff buttons, which necessitated some changes in their branch distinctions: Shipwrights (formerly carpenters) got silver-gray distinction cloth, wardmasters changed from scarlet to maroon, and the Artisan Branch specialties were further distinguished with green for electricians and dark blue for armourers. All warrant officers now wore a single quarter-inch gold stripe regardless of seniority.
Military Branch | |||||||||||
Admiral of the Fleet | Admiral | Vice-Admiral | Rear-Admiral, Commodore 1st Class |
Commodore 2nd Class | Captain | Commander | Lieutenant-Commander | Lieutenant | Sub-Lieutenant, Mate, Chief Boatswain,* Chief Gunner,* Commissioned Telegraphist,* Commissioned Master-at-Arms* | Boatswain, Gunner, Warrant Telegraphist, Chief Master-at-Arms | |
*Commissioned from warrant rank. | |||||||||||
Engineer Vice-Admiral | Engineer Rear-Admiral | Engineer Captain | Engineer Commander | Engineer Lieutenant-Commander | Engineer Lieutenant | Engineer Sub-Lieutenant, Mate (E), Chief Artificer Engineer,* Commissioned Mechanician* | Artificer Engineer, Warrant Mechanician | ||||
*Commissioned from warrant rank. | |||||||||||
Medical Branch |
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Surgeon Vice-Admiral | Surgeon Rear-Admiral | Surgeon Captain | Surgeon Commander | Surgeon Lieutenant-Commander | Surgeon Lieutenant | Commissioned Wardmaster* | Warrant Wardmaster | ||||
*Commissioned from warrant rank. | |||||||||||
Accountant Branch |
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Paymaster Rear Admiral | Paymaster Captain | Paymaster Commander | Paymaster Lieutenant-Commander | Paymaster Lieutenant | Paymaster Sub-Lieutenant, Commissioned Writer,* Commissioned Victualling Officer,* Commissioned Instructor in Cookery* | Warrant Writer, Warrant Victualling Officer, Warrant Instructor in Cookery | |||||
*Commissioned from warrant rank. | |||||||||||
Naval Instructor Branch |
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Instructor Captain | Instructor Commander | Instructor Lieutenant-Commander | Instructor Lieutenant, Schoolmaster Lieutenant* |
Chief Schoolmaster* | Head Schoolmaster | ||||||
*Commissioned from warrant rank. | |||||||||||
Artisan Branch (Warrant officers or commissioned from warrant rank) |
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Shipwright Lieutenant-Commander | Shipwright Lieutenant | Commissioned Shipwright | Warrant Shipwright | ||||||||
Commissioned Electrician | Warrant Electrician | ||||||||||
Commissioned Armourer | Warrant Armourer |
All text and images © Justin T. Broderick, 2013-2021 unless otherwise indicated.