(covers information from several alternate timelines)
|Petty officer insignia|
|United States Navy (PO 2nd class), 1980s|
|Starfleet, Mid 2270s|
|Starfleet (1st, 2nd class), |
Late 2270s - 2350s
|Starfleet (provisional), 2370s|
|Alternate Petty officer insignia|
|Terran Starfleet, 22nd century |
|Starfleet, 2370 (alternate timeline)|
Petty officer was an enlisted naval rank, a type of military rank used by the service organizations of different cultures. This title was senior to a crewman, and subordinate to a chief petty officer. In comparison to infantry ranking systems, this rank was approximately equivalent to the grade of corporal. However, the petty officer 2nd class rank was equivalent to that of sergeant and the 1st class rank was equivalent to that of staff sergeant.
This was the lowest rank considered to have the responsibility of a "noncommissioned officer." Personnel of this grade were usually referred to by their job title. In Starfleet, a petty officer could be referred to as yeoman, or as specialist.
There were usually individual grades of petty officers, differentiated as first, second and third class. This appellation could be added to either their rank or title (for example, "petty officer first class," "specialist second class," or "yeoman third class").
|Enlisted personnel||Commissioned officers||Generals and flag officers|
|ENS||LT JG||LT||LT CMDR||CMDR||CAPT||FCAPT||CDORE||RADM||VADM||ADM||FADM|
|2nd LT||1st LT||CAPT||MAJ||LT COL||COL||BRIG||MAJ GEN||LT GEN||GEN||MARSHAL|
|Positions:||Crewman • Technician • Chief||YMN||TAC • SO • 3rd • 2nd • 1st • CO • DD||Portmaster • Chief of Staff • CinC|
|Services:|| Andorian • Bajoran • Cardassian • Jem'Hadar • Klingon • Romulan • SS • Terran Empire Starfleet • Terran Empire MACO •|
United Earth MACO • United Earth/Federation Starfleet • United States • Vulcan