| Abbreviation | Definition |
|---|---|
| COOP | Coastal Ocean Observations Panel |
| COOP | Coastal Ocean Processes |
| COP | Coastal Ocean Program |
| COPE | Coastal Ocean Probing Experiment |
| COPEPOD | Coastal Oceanic Plankton Ecology, Production, Observation Database |
| COPEPOD | Coastal & Oceanic Plankton Ecology, Production, & Observation Database |
| COPEPODITE | Coastal Oceanic Plankton Ecology, Production, Observations Database Interactive Time-series Explorer |
| COPEPODITE | Coastal & Oceanic Plankton Ecology, Production, & Observations Database Interactive Time-series Explorer |
| COPS | Coastal Ocean Prediction Systems Program |
| COPS-91 | Cooperative Oklahoma Profiler Studies-1991 |
| CORE | Consortium for Oceanographic Research and Education |
| COSALC | Regional Project for Research and Training on Coastal Systems in Latin America and the Caribbean, & their Relations with the Continental Shelf |
| COSEE | Center for Ocean Science Education Excellence |
| COSEE | Centers for Ocean Science Education Excellence |
| COSEE | Consortium for Ocean Science Exploration and Engagement |
| COSIA | Communicating Ocean Sciences to Informal Audiences |
| COSNA | Composite Observing System for the North Atlantic |
| COSPAR | Committee On SPAce Research |
| COSPAS | Space System for Search of Distress Vessels |
| COSTED | Committee on Science and Technology in Developing Countries |