The rating of Chief petty officer was the highest enlisted rating in Starfleet. The chief petty officer, invariably referred to as chief, was a senior non-commissioned officer and is often in control of an entire section of petty officers and unrated enlisted personnel.
- The term "chief petty officer" is deduced from real-world naval nomenclature; it is not used in canon Trek, only the word "chief".
While chiefs are subordinate to all commissioned officers, intelligent ensigns or lieutenants will listen to their chiefs, as these non-commissioned officers frequently have far greater experience than the junior officers under whom they serve. Even senior officers recognize the value of a good chief petty officer and will take their suggestions and advice seriously.
- CPO Jamar Tambu
|Enlisted ranks||Non-commissioned officer ranks||Etc||Commissioned ranks||Flag ranks|
|Federation Marine Corps||Pvt||PFC||LCpl||Cpl||Sgt||SSgt||GySgt||MSgt|
|WO||2nd Lt||1st Lt||Capt||Maj||LtCol||Col||BGen||MajGen||LtGen||Gen||GenCorps
|Klingon ground troops||Bekk2||Bekk1||Cpl||Sgt||MSgt||SgtMaj||2nd Lt||1st Lt||Capt||Maj||LtCol||Col||Brig||LtGen||Gen|
|Romulan Star Navy||UHL||(unknown)||SLt||Lt||Cent||SCdr||Cdr||Adm|
|Tal Shiar||2nd Lt||1st Lt||Capt||Maj||Col||Gen|