Digital Selective Calling
Digital Selective Calling (DSC) is a standardized method of establishing and maintaining communication between vessels, or between vessels and shore stations, using digital signals over high frequency (HF), very high frequency (VHF), and medium frequency (MF) radio channels. DSC allows for the transmission of distress alerts, urgency calls, safety messages, and routine communications. It also enables automatic position reporting, which can aid in search and rescue operations. DSC operates on a separate channel from voice communications, allowing for simultaneous communication and reducing the likelihood of missed calls. It is an important component of the Global Maritime Distress and Safety System (GMDSS).
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