Petty Officer 1st Class

Chief petty officer, 1st class (CPO1) is the most senior non-commissioned member (NCM) rank of the Royal Canadian Navy (RCN). It is equivalent to a chief warrant officer (CWO) in the Canadian Army and Royal Canadian Air Force. It is immediately senior to the rank of chief petty officer, 2nd class and its equivalents, master warrant officer. It is part of the cadre of warrant officers.