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In April 2004, the Royal Navy created the rate of warrant officer class 2 (WO2), superior to the CPO and subordinate to existing warrant officers who were retitled as warrant officer class 1 (WO1). The WO2 replaced the non-substantive appointment of charge chief petty officer (CCPO) in the technical branches. Prior to this change the CCPO was considered as a NATO OR-8, equivalent to WO2. Warrant officers wear the same rank insignia as their counterparts in the Royal Marines.