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Prior to the GMDSS, the number and type of radio safety equipment ships had to carry depended upon its tonnage. With GMDSS, the number and type of radio safety equipment ships have to carry depends upon the GMDSS areas in which they travel. GMDSS sea areas are classified into the following four areas: A1, A2, A3 and A4.
In particular, amendments in 1988 based on amendments of International Radio Regulations in 1987 replaced Morse code with the Global Maritime Distress Safety System (GMDSS) and came into force beginning 1 February 1992. The issues covered by the treaty are set out in the list of sections (above).
Second, the targeted group must be selected, if necessary. This can be all ships, ships of a specific geographic area, or an individual ship. Lastly, the call should be made. GMDSS protocol requires that the safety call must be spoken to attract attention of the selected vessels. Procedure for the call is: [1]: 41 SÉCURITÉ x 3 ALL STATIONS x 3
An AIS-SART made by German company WeatherDock AG. An AIS-SART is a self-contained radio device used to locate a survival craft or distressed vessel by sending updated position reports using a standard Automatic Identification System (AIS) class-A position report.
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Monitoring sea traffic is crucial in the English Channel, which has 20 percent of global traffic (about 300,000 ships annually). [3] CROSS receives and analyses mandatory reports sent by all ships traversing the English Channel and using one of the three traffic separation schemes off the coast of Ushant (Ouessant) and across the Strait of Dover.
A standard SART 9 GHz radar transponder, produced by Jotron, on board a Norwegian ferry. The unit is 251 mm high. A search and rescue transponder (SART) is a self-contained, waterproof transponder intended for emergency use at sea.
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.