OS1: Operations Specialist Petty Officer 1st Class
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Others
Language: English
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What is the full form of OS1?
OS1 stands for Operations Specialist Petty Officer 1st Class. Fullformexpand.com has 1 other full form for abbreviation OS1.
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"OS1." Fullformexpand.com, https://www.fullformexpand.com/os1/446809. Accessed 7 Jan. 2026.
Fullformexpand.com, 2026. "OS1." Accessed January 7, 2026. https://www.fullformexpand.com/os1/446809.
"OS1." (n.d.). Fullformexpand.com. Retrieved January 7, 2026, from https://www.fullformexpand.com/os1/446809.
OS1. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/os1/446809 (Accessed: 7 January 2026).
Found 1 other full form for OS1 →
| Term | Full Form | Category |
|---|---|---|
| OS1 | Officer's Steward 1st Class (non Petty Officer)
| Others |
View All Abbreviations →
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