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Petty Officer Third Class is the fourth enlisted rank in Starfleet, just above Crewman and below Petty Officer Second Class, and is the lowest form of non-commissioned officer, equivalent to a Corporal in the Marines or Senior Airman in the Starfighter Corps.

Unlike the Crewman and lower ranks, advancement to Petty Officer Third Class is not automatic given time in service, but is also contingent on performance evaluations by their superiors and rate examinations (test of specialty knowledge), except for certain technical ratings which carry automatic advancement to PO3, after successful completion of the rating's "A" school and fufillment of time in rate requirements. The advancement cycle is currently every 6 months. Only a certain number of billets (job openings for this rank) open up biannually and all Crewmen compete. The top scorers are chosen for advancement, but only in sufficient quantities to fill the billets available.

Petty Officers serve a dual role as both technical experts and as leaders. Unlike the sailors below them, there is no such thing as an "undesignated Petty Officer." Every petty officer has both a rate (rank) and rating (job, similar to an MOS in other branches). A petty officer's full title is a combination of the two. Thus, a Petty Officer Third Class who has the rating of Fire Control Techinican is called a Fire Control Technician Third Class. The term petty officer is, then, only used in abstract, the general sense, when referring to a group of petty officers of different ratings, or when the petty officer's rating is unknown.

Each rating has an official abbreviation, such as FT for Fire Control Techinican, ST for Sensor Technician, or ET for Electronics Technician. When combined with the petty officer level, this gives the short-hand for the petty officer's rank, such as FT3 for Fire Control Technician Third Class. It is common practice to refer to the petty officer by this short hand in all but the most formal correspondence (such as printing and inscription on awards). Often, the petty officer is just referred to by the short hand designation, without using the surname. Thus FT3 Shearer would just be called FT3.

Insignia Edit

StarfleetEdit

2373 - PO3 (Command) 2373 - PO3 (Operations) 2373 - PO3 (Sciences)


Current Edit



Enlisted ranks Non-commissioned officer ranks Etc Commissioned ranks Flag ranks
E1 E2 E3 E4 E5 E6 E7 E8 E9 O1 O2 O3 O4 O5 O6 O7 O8 O9 O10 O11
Starfleet CR CA CN PO3 PO2 PO1 CPO SCPO MCPO
CMCPO
FMCPO
MCPOSF
WO

CDT

MID

REC

ENS LTJG LT LCDR CDR CAPT

FCAPT

DDIR

COMM RADM VADM ADM FADM

CinC

Federation Marine Corps Pvt PFC LCpl Cpl Sgt SSgt GySgt MSgt
1st Sgt
MGySgt
SgtMaj
SMOMC
WO

Cdt

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
Klingon navy PO2 PO1 CPO MCPO ENS LTJG LT LCDR CDR CAPT RADM VADM ADM
Romulan Star Navy UHL (unknown) SLt Lt Cent SCdr Cdr Adm
Tal Shiar 2nd Lt 1st Lt Capt Maj Col Gen

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