| COMSAR | Sub-Committee on Radiocommunications and Search and Rescue (IMO) |
| ECDIS | Electronic Chart Display Information System |
| GMDSS | Global Maritime Distress and Safety System |
| GTS | Global Telecommunication System (WMO) |
| HF | High Frequency |
| IHO | International Hydrographic Organization |
| IMO | International Maritime Organization |
| IMSO | International Mobile Satellite Organization |
| IOC | Intergovernmental Oceanographic Commission (of UNESCO) |
| ITU | International Telecommunication Union |
| JCOMM | Joint WMO/IOC Technical Commission for Oceanography and Marine Meteorology |
| LES | Land Earth Station (Inmarsat) |
| MSC | Maritime Safety Committee (IMO) |
| MSI | Maritime Safety Information |
| NAVTEX | International system for reception of marine safety information |
| NMS | National Meteorological Service |
| RSMC | Regional Specialized Meteorological Centre |
| SOLAS | International Convention for the Safety of Life at Sea |
| UNESCO | United Nations Educational, Scientific and Cultural Organization |
| WMO | World Meteorological Organization |
| WWNWS | World-Wide Navigational Warning Service (IHO/IMO) |