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
Lieutenant (British Army and Royal Marines) ranks. A Lieutenant called Smith is addressed and referred to as "Mr Smith". From 1856 to 1880 a lieutenant's rank insignia was worn on the collar and comprised a single crown, the current insignia for a major. In 1881 lieutenants had their insignia changed to single pip and moved to the shoulder. In 1902 they received a second pip, the badge of rank which has been kept to the present. Lieutenant (British Army and Royal Marines) Lieutenant (; Lt) is a junior officer rank in the British Army and Royal Marines. It ranks above second lieutenant and below captain and