| Abbreviation | Definition |
|---|---|
| NAVELEX | NAVal ELEctronics Systems Command |
| NAVFAC | Naval Facilities Engineering command headquarters |
| NAVO | Naval Oceanographic Office |
| NAVORD | Naval Ordnance Systems command headquarters |
| NAVSAT | Navigational Satellite |
| NAVSHIPS | Naval Ship Systems command headquarters |
| NAWAC | National Aviation Weather Advisory Committee |
| NAWAS | National Warning System |
| NAWAU | National Aviation Weather Advisory Unit |
| NBCP | Newark Basin Coring Project |
| NBDC | National Buoy Data Center |
| NBE | Narragansett Bay Ecosystem |
| NBH | New Bedford Harbor |
| NBI | Nile Basin Initiative |
| NBP | R/V Nathaniel B. Palmer |
| NBS | National Biological Survey |
| NBS | National Bureau of Standards |
| NC | NOAA Corps |
| NCASC | National Capital Administrative Support Center |
| NCDC | National Climate Data Center |