| Abbreviation | Definition |
|---|---|
| USNH | United States Naval Hospital |
| USNI | United States Naval Institute |
| USNIMD | United States Naval Institute Military Database |
| USNIP | United States Naval Institute Proceedings |
| USNMR | United States National Military Representative |
| USNMTG | United States NATO (North Atlantic Treaty Organization) Military Terminology Group |
| USNMTG | United States North Atlantic Treaty Organization (NATO) Military Terminology Group |
| USNO | United States Naval Observatory |
| USNOB | United States Naval Operations Base |
| USNORTHCOM | United States Northern Command |
| USNR | United States Naval Reserve |
| USNR | United States Navy Reserve |
| USNRF | United States Naval Reserve Forces |
| USNS | United States Naval Ship |
| USNSCC | United States Naval Sea Cadet Corps |
| USNT | United States Naval Tug |
| USNV | United States Naval Vessel |
| USNV | United States Night Vision sight |
| USNY | United States Navy Yard |
| USO | Unidentified Submarine Object |