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
Shoulder mark Auscam uniform designs featured shoulder straps, upon which slip-on rank insignia of Commissioned Officers could be affixed, and non-commissioned officers in the Air Force and Navy only. No shoulder-strap slip-ons are available for enlisted members of the army, whereas the other two services had appropriate slip ons, who have rank patches sewed onto the uniform arms. This older design is no longer issued, but may still be seen on personnel whose most recent uniform issue pre-dates the use of the new design. In the Canadian Forces, slip-ons displaying rank insignia and shoulder titles are worn on the shoulder straps of