Petty Officer Second Class

Petty Officer Second Class is the fifth enlisted rank in Starfleet, just above Petty Officer Third Class and below Petty Officer First Class, and is a non-commissioned officer. 
Similar to Petty Officer Third Class, advancement to Petty Officer Second Class is dependent on time in service, performance evaluations by superiors, and rate (technical specialty) examinations. The advancement cycle is currently every 6 months. Only a certain number of billets (job openings for this rank) open up biannually and all petty officers third class 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). A petty officer's full title is a combination of the two. Thus, a Petty Officer Second Class, who has the rating of Fire Control Technician would properly be called a Fire Control Technician Second 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. Often, the petty officer is just referred to by the short hand designation, without using the surname. Thus FT2 Collinwood would just be called FT2. A Second Class Petty Officer may be generically referred to as PO2 when the sailor's rating is not known, although some prefer to be called simply "Petty Officer (Collinwood)." 
Each rating has an official abbreviation, such as FT for Fire Control Technician, ST for Sensor Technician, or TM for Torpedoman. When combined with the petty officer level, this gives the short-hand for the petty officer's rank, such as FT2 for Fire Control Technician Second 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 FT2 Collinwood would just be called FT2.
== Insignia ==
===Starfleet===
===Klingon Navy===
Image:Klingon Navy - PO2.PNG
== Current ==
* AT2 Jerry Larson