United States
The title of petty officer in the United States Navy and United States Coast Guard has three separate "classes" (3rd class through 1st class) and three senior grades (chief petty officer, senior chief petty officer, master chief petty officer).
Petty officer, first class is equivalent to staff sergeant in the United States Army and Marine Corps, and technical sergeant in the United States Air Force.
Petty officer, second class is equivalent to sergeant in the United States Army and Marine Corps, and staff sergeant in the United States Air Force.
Petty officer, third class is equivalent to corporal in the United States Army (or specialist), corporal in the United States Marine Corps, and senior airman in the United States Air Force.
| United States enlisted ranks | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pay Grade → Branch of Service ↓ |
E-1 | E-2 | E-3 | E-4 | E-5 | E-6 | E-7 | E-8 | E-9 | |
| Air Force | AB | Amn | A1C | SrA | SSgt | TSgt | MSgt | SMSgt | CMSgt - CCM - CMSAF | |
| Army | PVT | PV2 | PFC | SPC - CPL | SGT | SSG | SFC | MSG - 1SG | SGM - CSM - SMA | |
| Marine Corps | Pvt | PFC | LCpl | Cpl | Sgt | SSgt | GySgt | MSgt - 1stSgt | MGySgt - SgtMaj - SgtMajMarCor | |
| Navy | SR | SA | SN | PO3 | PO2 | PO1 | CPO | SCPO | MCPO - CMDCM - FORCM - FLTCM - MCPON | |
| Coast Guard | SR | SA | SN | PO3 | PO2 | PO1 | CPO | SCPO | MCPO - CMC - MCPOCG | |
Read more about this topic: Petty Officer
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