| Abbreviation | Definition |
|---|---|
| NURG | Newcastle Underwater Research Group |
| NURP | National Undersea Research Program |
| NURP | NOAA Undersea Research Program |
| NUSC | Naval Underwater Systems Center |
| NUSC | Naval Underwater Systems Center/Command |
| NUSL | Naval Underwater Sound Laboratory |
| NVP | Nearshore Vertebrate Predator |
| NWAFC | Northwest and Alaska Fishery Center |
| NWB | Natural Water Balance |
| NWDC | National Wildlife Defence Council |
| NWQ | National Water Quality database |
| NWR | National Wildlife Refuge |
| NWR | North West Rollers |
| NWSEO | National Weather Service Employees Organization |
| NWSFO | NWS Forecast Office |
| NWSTG | NWS Telecommunications Gateway |
| NWW | North West Water |
| NWWS | NOAA Weather Wire Service |
| NZMS | New Zealand Meteorological Service |
| NZOI | New Zealand Oceanographic Institute |