| 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) |