Governmental & Military Abbreviations and Acronyms

1. NW1
   NUCLEAR WEAPONSMAN PETTY OFFICER 1ST CLASSS
2. NW2
   NUCLEAR WEAPONSMAN PETTY OFFICER 2ND CLASSS
3. NW3
   NUCLEAR WEAPONSMAN PETTY OFFICER 3RD CLASSS
4. OFF STD
   Officer'S Steward
5. OILER
   Oiler
6. OS1
   OFFICER'S STEWARD 1ST CLASS (NON PETTY OFFICER)
7. OS1
   OPERATIONS SPECIALIST PETTY OFFICER 1ST CLASS
8. OT1
   OCEAN SYSTEMS TECHNICIAN PETTY OFFICER 1ST CLASS
9. OT3
   OCEAN SYSTEMS TECHNICIAN PETTY OFFICER 3RD CLASS
10. OTA1
    OCEAN SYSTEMS TECHNICIAN (AUTOMATIC) PETTY OFFICER 1ST CLASS
11. OTA2
    OCEAN SYSTEMS TECHNICIAN (AUTOMATIC) PETTY OFFICER 2ND CLASS
12. OTA3
    OCEAN SYSTEMS TECHNICIAN (AUTOMATIC) PETTY OFFICER 3RD CLASS
13. OTASN
    OCEAN SYSTEMS TECHNICIAN (AUTOMATIC) SEAMAN
14. OTASR
    OCEAN SYSTEMS TECHNICIAN (AUTOMATIC) SEAMAN RECRUIT
15. OTM1
    OCEAN SYSTEMS TECHNICIAN (MANUAL) CHIEF PETTY OFFICER
16. OTM2
    OCEAN SYSTEMS TECHNICIAN (MANUAL) PETTY OFFICER 2ND CLASS
17. OTM3
    OCEAN SYSTEMS TECHNICIAN (MANUAL) PETTY OFFICER 3RD CLASS
18. OTMSA
    OCEAN SYSTEMS TECHNICIAN (MANUAL) SEAMAN APPRENTICE
19. OTMSN
    OCEAN SYSTEMS TECHNICIAN (MANUAL) SEAMAN
20. OTMSR
    OCEAN SYSTEMS TECHNICIAN (MANUAL) SEAMAN RECRUIT

Last updated: May 24, 2020 — Total entries: 74,797