The maritime safety information (MSI) is part of the WWNWS (World Wide Navigational Warning Service). The WWNWS is a co-ordinated global service for the promulgation of navigational warnings from official information providers, such as:
Reception of MSI is free of charge to all ships.
In GMDSS Sea Area A1 and A2 MSI are broadcast via NAVTEX system, and outside these areas via SafetyNET system (with INMARSAT) and/or HF NBDP. On the other hand SafetyNET system can not be used in GMDSS Sea Area A4.
MSI includes various messages related to maritime safety, especially warnings, using a variety of different radio systems to ensure coverage of different sea areas. Systems that provide such information should ensure that all ships of every size and nationality can receive this safety information. Mostly this information takes the form of navigational and meteorological warnings, meteorological forecasts, and other urgent or safety-related messages). MSI may be spread through narrow-band direct-printing telegraphy (NAVTEX, EGC) or by voice (VHF,MF). In some parts of the world it can also be received via the World Wide Web (e.g., Australia). Many warnings are of a temporary nature, but others may remain in force for several weeks and may be superseded by other notices.
- National Hydrographic Offices, for navigational warnings and chart correction data;
- National Meteorological Offices, for weather warnings and forecasts;
- Rescue Co-ordination Centres (RCCs), for shore-to-ship distress alerts, and other such information;
- The International Ice Patrol, for Oceanic ice hazards.
Reception of MSI is free of charge to all ships.
In GMDSS Sea Area A1 and A2 MSI are broadcast via NAVTEX system, and outside these areas via SafetyNET system (with INMARSAT) and/or HF NBDP. On the other hand SafetyNET system can not be used in GMDSS Sea Area A4.
MSI includes various messages related to maritime safety, especially warnings, using a variety of different radio systems to ensure coverage of different sea areas. Systems that provide such information should ensure that all ships of every size and nationality can receive this safety information. Mostly this information takes the form of navigational and meteorological warnings, meteorological forecasts, and other urgent or safety-related messages). MSI may be spread through narrow-band direct-printing telegraphy (NAVTEX, EGC) or by voice (VHF,MF). In some parts of the world it can also be received via the World Wide Web (e.g., Australia). Many warnings are of a temporary nature, but others may remain in force for several weeks and may be superseded by other notices.
Last modified: Saturday, 25 April 2020, 7:50 PM