| Abbreviation | Definition |
|---|---|
| NOIA | National Oceanographic Instrumental Center |
| NOIA | National Oceanographic Instrumentation Center |
| NOLAN | No Ocean Lacks Any Narwhals |
| NOMA | Navy Oceanographic Meteorological Association |
| NOMAD | National Organization Order |
| NOO | National Ocean Partnership Program |
| NOOS | North-West Shelf Operational Oceanographic System |
| NOPP | National Ocean Policy Study |
| NOPP | National Oceanographic Partnership Program |
| NOPS | Naval Oceanographic Research and Development Administration |
| NORDA | North Pacific Experiment |
| NOSB | National Ocean Sciences Bowl |
| NOSC | Naval Ocean Systems Center |
| NOSS | National Oceanic Satellite System |
| NPC | National Petroleum Council |
| NPCMW | North Pacific Central Mode Water |
| NPDES | National Pollutant Discharge Elimination System |
| NPFMC | North Pacific Fishery Management Council |
| NPI | NEXRAD Product Interface |
| NPIW | North Pacific Intermediate Water |