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
Royal Navy officer rank insignia of the curl. The Women's Royal Naval Service was abolished in 1994 and female officers now have the same gold rings as male officers. Part of the RN as the Senior Service, the Royal Marines uses the same rank structure and insignia that the British Army has save for the field marshal rank, and the RM initials for second lieutenants to lieutenant colonels to distinguish them from the Army itself. The major general rank since 1996 is the highest rank of the officer corps, but in the past, generals and lieutenant generals headed the Corps, and from 1857 to 1957