| Abbreviation | Definition |
|---|---|
| ICCERSP | Interagency Coordinating Committee of the Earth Resources Survey Program |
| ICDS | Ice Coring and Drilling Services |
| ICES | International Council for the Exploration of the Sea |
| ICG | International Coordination Group |
| ICG-ITSU | International Coordination Group for the Tsunami Warning System in the Pacific |
| ICH | Instituto Cubano de Hidrografia |
| ICH | Instituto Cubano de Higraf?a |
| ICITA | International Cooperative Investigation for the Tropical Atlantic |
| ICJ | International Court of Justice |
| ICLARM | International Center for Living Aquatic Resources Management |
| ICLEI | International Council for Local Environmental Initiatives |
| ICM | Instituto de Ciencias del Mar |
| ICMAREP | Interagency Committee on Marine Environmental Prediction |
| ICMS | Interdepartmental Committee for Meteorological Services |
| ICMSE | Interagency Committee on Marine Science and Engineering |
| ICNAF | International Convention of the Northwest Atlantic Fisheries |
| ICO | Interagency Committee on Oceanography |
| ICOD | International Center for Ocean Development |
| ICOEES | International Committee on Ocean Exploration and Environmental Services |
| ICPO | International CLIVAR Project Office |