sentences:  The first establishment to wear a non-commissioned badge was the RAN/RAAF Australian Joint Anti-Submarine School (AJASS) in 1967.Being a joint unit, it was decided that the badge design would be based on the RAAF unit badge, with a double circle of gold rope surrounding the collar on which the unit name was written, but with an alteration in colouring to the black and gold system used on the scrolls of ships' badges.The royal crown was used instead of the naval crown.