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 edging and gold devices. Instead of the baton and sword or foul anchor, civil branch epaulettes substituted a star. Navigating branch epaulettes were the same as the military branch, but with crossed plain anchors in place of the foul anchor. The epaulette stars had eight points, quite unlike the Order of the Bath stars worn by army officers. In 1891 the admiral of the fleet changed to a crown above two crossed batons within a wreath, similar to the badge of a field marshal. Also in 1891 shoulder-straps were introduced for use on white uniforms and on the greatcoat, and