| Abbreviation | Definition |
|---|---|
| NYH | Navy Youth Hockey |
| NZN | New Zealand Navy |
| OASUW | Objective Anti-Surface Warfare |
| OC | ficer's Cook |
| OC | Officer's Cook |
| OC1 | Officer's Candidate |
| OC1 | Officer's Cook 1st Class |
| OC2 | Officer's Candidate |
| OC2 | Officer's Cook 2nd Class |
| OC3 | Officer's Candidate |
| OC3 | Officer's Cook 3rd Class |
| OCC | ficer's Candidate |
| OCC | Officer's Candidate |
| OCONUS | Outdoor Cannon Over Naval Uni Submarine |
| OD | Ordinary Seaman |
| OFFSTD | ficer's Steward |
| OFFSTD | Officer's Steward |
| OILER | ler |
| OILER | Oiler |
| OM1 | Opticalman Petty Officer 1st Class |