A petty officer ( PO) is a non-commissioned officer in many navy. Often they may be superior to a seaman, and subordinate to more senior non-commissioned officers, such as chief petty officers.
Petty officers are usually sailors that have served at least several years in their respective navies. Petty officers represent the junior and mid-grade non-commissioned officer ranks of many naval services, and are generally responsible for the day-to-day supervision of ranks junior to them. They may also serve as technical specialists within their Naval rating (military occupation).
Two of the Royal Navy petty officer's rates, midshipman and master's mate, were a superior petty officer with a more general authority, but they remained no more than ratings. However, it was quite possible for a warrant officer (such as the armourer), in his role as a superior officer, to be for striking a midshipman. This is because the midshipman was regarded as future sea officer, with the all-important social distinction of having the right to walk the quarterdeck. Midshipmen wore distinctive uniforms, master's mates dressed respectably, and both behaved like officers. The master's mate rating evolved into the rank of sub-lieutenant, and midshipman evolved into naval cadet. In the same administrative reforms of the 1860s that created the rank of Sub-lieutenant, two grades of Petty Officer were established for senior ratings — Petty Officer Second Class and Petty Officer First Class, the latter usually being achieved by men who had served as a PO 2nd Class with good conduct for six years. PO2s wore 'square rig' (the traditional sailor suit worn by junior ratings) while PO1s wore 'fore and aft' rig like chief petty officers and above. PO2s wore insignia of a fouled anchor (as for Leading seaman) but surmounted by a crown, while the insignia of a PO1 was a pair of crossed fouled anchors with a crown. The rank of Petty Officer Second Class was abolished in 1907 and the rank simply being titled as Petty Officer from then, with the uniform and insignia formerly used by PO1s.[2], London Gazette, 23rd August 1907
Petty officers are normally addressed as "Petty Officer Bloggins" or "PO Bloggins", thereafter as "PO". The "1st class" and "2nd class" designations are normally only used when such a distinction needs to be made, such as on a promotion parade or to distinguish two petty officers with similar names but different ranks. The NATO rank denotion for "petty officer, 2nd class" is OR-6 (petty officers, 2nd class with less than 3 years seniority are considered OR-5). The NATO rank denotion for "petty officer, 1st class" is OR-7.
A petty officer has the ability to work as a leader, capable of taking charge of a group of personnel, and taking roles in the training and recruitment of new members of the Indian Navy.
In the Navy, Petty Officer, Third Class is the juniormost of the Non-Commissioned Officer ranks, and thus a sailor must demonstrate satisfactory performance in the previous rank (E-3) in the form of a favorable performance review(s) by his/her superiors, and the passing of an exam, in order to be promoted to PO3.
Enlisted rank has two components: rate (pay grade) and rating (job specialty). Both components are reflected in the title. A sailor in the rate of petty officer first class with a rating of Aviation Machinist's Mate, would be an Aviation Machinist's Mate 1st Class (abbreviated "AD1"). In the Navy, it is acceptable to refer to a Petty Officer as such, while in the Coast Guard, rating is always used.
File:British Royal Navy OR-6.svg|Petty officer
(Antigua and Barbuda Coast Guard)
File:Royal Australian Navy OR-6.svg|Petty officer
(Royal Australian Navy)
File:Bahamas-Navy-OR-6.svg|Petty officer
(Royal Bahamas Defence Force)
File:02.BNF-PO.svg|পেটি অফিসার
Pēṭi aphisāra
(Bangladesh Navy)
File:Barbados Coast Guard OR6.png|Petty officer
(Barbados Coast Guard)
File:British Royal Navy OR-6.svg|Petty officer
(Republic of Fiji Navy)
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(Guyana Coast Guard)
File:PO Indian Navy.svg|Petty officer
(Indian Navy)
File:Ireland-Navy-OR-4.svg|Petty officer
(Irish Naval Service)
File:Jamaica-Navy-OR-6.svg|Petty officer
(Jamaican Coast Guard)
File:03-Namibia Navy-PO.svg|Petty officer
(Namibian Navy)
File:RNZN OR-6.svg|Petty officer
(Royal New Zealand Navy)
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(Nigerian Navy)
File:PNG_Maritime_OR-6.svg|Petty officer
(Papua New Guinea Maritime Element)
File:SAN-Navy-OR-6.svg|Petty officer
(South African Navy)
File:Sri_Lanka-Navy-OR-6.svg|Petty officer
(Sri Lanka Navy)
File:Trinidad & Tobago-Navy-OR-6.svg|Petty officer
(Trinidad and Tobago Coast Guard)
File:British Royal Navy OR-6.svg|Petty officer
(Royal Navy)
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