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Map of the 21 NAVAREAS into which all the world's oceans are divided. Each serves to allocate responsibility for sending Marine and Safety Information (navigational warnings) to ships at sea, as part of the Global Maritime Distress and Safety System (GMDSS). A list of Navtex stations.
Each station transmits a NAVTEX broadcast six times a day, including two rebroadcasts of the general forecast. A NAVTEX broadcast includes maritime navigation warnings, weather forecasts, ice warnings, Gulf Stream locations, radio navigation information, rescue messages, and marine advisories. Each station has 2 NAVTEX transmitters.
A notice to mariners (NtM [1] or NOTMAR, [2]) advises mariners of important matters affecting navigational safety, including new hydrographic information, changes in channels and aids to navigation, and other important data. [3] Over 60 countries which produce nautical charts also produce a notice to mariners.
The World-Wide Navigational Warning Service (WWNWS) is a radio system set up by the International Hydrographic Organization (IHO) which provides hazard warnings to maritime shipping. Upon the onset of a meteorological or geological disaster that would pose a danger to shipping lanes, warnings are issued within affected NAVAREAs (designated ...
The Radio Navigational Aids (Publication 117) publication contains a detailed list of selected worldwide radio stations that provide services to the mariner. [1] The publication is divided into chapters according to the nature of the service provided by the radio stations. [ 1 ]
Recent costal radio station provide medical advice services for ships, transmitting meteo messages and navigational warnings (NAV-Notice) on a regular base and all of them do a distress chanel watch (DSC-Watch) on VHF Chanel 16. Not all station monitore 2182 kHz shortwave anymore.
Other marine information such as new charts, channel depths, naval operations, and regattas is included. Since temporary information of short duration is not included in the weekly notice to mariners , the local notice to mariners may be the only source of such information.
A NAVTEX receiver prints an incoming message NAVTEX message for the Baltic Sea. NAVTEX (NAVigational TEleX), sometimes styled Navtex or NavTex, is an international automated medium frequency direct-printing service for delivery of navigational and meteorological warnings and forecasts, as well as urgent maritime safety information (MSI) to ships.