| Abbreviation | Definition |
|---|---|
| OHM | Offshore Hydrocarbon Mapping |
| OHTEX | Ocean Heat Transport Experiment |
| OI | Optimum Interpolation |
| OIG | Office of the Inspector General |
| OIT | Oregon Institute of Technology |
| OLR | Outgoing Longwave Radiation |
| OLS | Operational Linescan System |
| OMA | Oceanography and Marine Assessment |
| OMO | Office of Marine Operations |
| OMT | Oceanography and Marine Technology |
| OMW | Ocean Monitoring Workstation |
| ONCO | Office of NOAA Corps Operations |
| ONR | Office of Naval Research |
| OOC | Operational Oceanography Center |
| OOPAC | Oregon Ocean Policy Advisory Council |
| OOS | Ocean Observing System |
| OOSDP | Ocean Observing System Development Panel |
| OPAC | Ocean Policy Advisory Council |
| OPC | Ocean Products Center |
| OPDIN | Ocean Pollution Data Center |