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DSCdecoder allows you to use your PC and soundcard to decode maritime mobile service messages using the Digital Selective Calling (DSC) system and also DGPS and Navtex broadcasts. DSC signalling is used in the MF, HF and VHF bands for distress and calling between ships and coast stations. Navtex messages are broadcast by coast stations and carry infomration about navigational warnings and weather forecasts.

Messages that can be decoded include routine calls for test purposes between ships and coast stations; calls to establish communication by some other means (voice, etc.) between a ship and a coast station; notification of routine and safety messages from coast stations; Vessel Traffic Service (VTS) messages, distress messages and distress relay messages. DSCdecoder will decode these messages and display and log their content.