| Abbreviation | Definition |
|---|---|
| NCEP | National Centers for Environmental Prediction |
| NCM | National Coastal Monitoring |
| NCMRED | National Council of Marine Resources and Engineering |
| NCSA | National Center for Supercomputing Applications |
| ND | Neutral Density |
| ND | No Depth |
| NDBO | National Data Buoy Office |
| NDDN | National Dry Deposition Network |
| NDL | No Decompression Limit |
| NDSB | NOAA Diving Safety Board |
| NDSC | Network for the Detection of Stratospheric Change |
| NDSF | National Deep Submergence Facility |
| NDTE | North Dakota Tracer Experiment |
| NDVI | Normalized Difference Vegetation Index |
| NEAFC | North- East Atlantic Fisheries Commission |
| NEC | North Equatorial Current |
| NEC | Nuclear Energy Commission |
| NECC | North Equatorial Counter Current |
| NECC | North Equatorial Counter-Current |
| NECOP | Nutrient-Enhanced Coastal Ocean Productivity |