The Furuno IC 307 is a GMDSS distress button unit used for emergency signaling in marine radios. It allows instant distress alerts to be sent to coast stations and nearby vessels.
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VHF DSC MMSI Programming configures the Digital Selective Calling (DSC) system in marine VHF radios by assigning a valid MMSI number. This allows the radio to automatically send distress alerts and communicate with other vessels, significantly improving maritime safety.