necessarily have the same meaning as another. In 1948 and 1951, reforms were implemented to bring the branches into line with each other. A star above the badge normally indicates a person of superior qualifications, and another star below denotes that the person has passed for (and is performing) specific duties; e.g. gunnery, captain of turret, torpedo, torpedo-boat coxswain or signals. The crown is the emblem of authority, and is common in most petty officer, CPO, instructor and police badges. Warrant officers and above do not wear branch badges. Until the late 1990s, artificer apprentices and leading artificers wore the same uniform as petty officers (with a red beret or cap badge, similar to a petty officer's). Apprentices were the last junior ratings not to be dressed as seamen; they did not wear "square rig". History In 1879 Chief Petty Officers received a fore-and-aft uniform similar to that of the officers, with a cap badge of an anchor within a cord surmounted by a crown. In 1890, they ceased to wear an arm badge. In 1913, the rank of Petty Officer 2nd Class was abolished but the other badges remained the same. In 1920, petty officers with four years' standing also received the fore-and-aft rig with the cap badge formerly worn by CPOs. The CPOs added a wreath to their cap badge, making it similar to the earlier arm badge. In 1970 a new rank of Fleet chief petty officer was introduced, with insignia of the royal coat of arms on the lower arm (identical to a warrant officer class 1 in the army and RAF, to which the new rank was equivalent). This rank was renamed warrant officer, and then warrant officer class 1. In 2004 the rank of warrant officer class 2 was formed from those CPOs holding the appointment of charge chief petty officer. The insignia is a crown within a wreath, also worn on the lower arm. The badges are now worn on the shoulders of 3A/B and 4A/B. Chevrons on the left sleeve, below the rank badge, are for long service and good conduct (one for each four-year period; no more than three may be worn). A chief petty officer in the blue uniform wears three buttons on their sleeves to indicate rank, the same rank insignia (but topped with a star) used by Chilean Navy midshipmen. The WO2 rank began to be phased out