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
United States Coast Guard officer rank insignia insignia (referred to as "office insignia") instead of gold; with a "hollow" USCG shield above containing the letters "USCG" superimposed above a red "A" (to signify an appointed officer") or silver "A" (to signify an elected officer). Metal and sew-on insignia are identical to Coast Guard officer insignia, except that a red, blue, or black "A" is superimposed. Auxiliarists generally do not use titles in direct address. United States Coast Guard officer rank insignia United States Coast Guard officer rank insignia describes an officer's pay-grade. Rank is displayed on collar devices, shoulder boards, and on the sleeves of dress uniforms.