Royal Navy officer rank insignia the Corps also had the unique ranks of colonel second commandant and colonel commandant. Rank insignia are on brown or dark blue shoulder boards in all dresses save for the combat and barracks duty dress uniforms. From 1911 to 1957 the officer corps even included warrant officers and commissioned warrant officers in the same way as the RN. Although the Royal Marines does not officially use the rank of field marshal, the Captain General Royal Marines, the ceremonial head of the corps, wears a field marshal's rank insignia. Royal Navy officer rank insignia Uniforms for naval officers were not authorised
British Army other ranks rank insignia British Army other ranks rank insignia The term used to refer to all ranks below officers is "other ranks" (abbreviated "ORs"). It includes warrant officers, non-commissioned officers ("NCOs") and ordinary soldiers with the rank of private or regimental equivalent. Officers may, in speaking, distinguish themselves from those ""in the ranks"". As most units in the British Army have long traditions (some dating back as far back as the 1600s) some variation has developed in the terminology and insignia used for non-commissioned ranks, most notably in the Foot Guards and Household Cavalry. Many units do not use the rank "Private", using