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 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. All Coast Guard officers are line officers, unlike the Navy, which has a staff corps to identify certain career fields. The volunteer United States Coast Guard Auxiliary does not use the rank system, but uses the modified Coast Guard officer rank insignia to signify a member's position within the organization. For example, a Flotilla Commander wears insignia similar to a Lieutenant. USCG Auxiliary officers wear silver braid