| Abbreviation | Definition |
|---|---|
| NTTC | Naval Technical Training Center |
| NTTC | Navy Trauma Training Center |
| NTTP | Navy Tactics Techniques and Procedures |
| NTTR | Naval Torpedo Testing Range |
| NTW | Navy Theater Wide |
| NTWA | Naval Test Wing Atlantic |
| NTWD | Navy Theater Wide Defense |
| NTWS | Navy Together We Served |
| NURSE | Nurse (male) |
| NURSE | rse (male) |
| NUSC | Naval Underwater Systems Command |
| NUWC | Naval Undersea Warfare Center |
| NVR | Naval Vessel Register |
| NW1 | clear Weaponsman Petty Officer 1st Classs |
| NW1 | Nuclear Weaponsman Petty Officer 1st Classs |
| NW2 | clear Weaponsman Petty Officer 2nd Classs |
| NW2 | Nuclear Weaponsman Petty Officer 2nd Classs |
| NW3 | clear Weaponsman Petty Officer 3rd Classs |
| NW3 | Nuclear Weaponsman Petty Officer 3rd Classs |
| NWAC | Naval War Arctic Circle |