Petty Officer

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Petty Officer is a term used for non-commissioned officer ranks in the UNSC Navy.

• Petty Officer Third Class
• Petty Officer Second Class
• Petty Officer First Class

• Chief Petty Officer
• Senior Chief Petty Officer
• Master Chief Petty Officer

Titles

While the first three ranks are generally referred to as "Petty Officers," ranks from Chief Petty Officer and up are more correctly termed "Chiefs."