Which statement best defines Digital Selective Calling (DSC)?

Which statement best defines Digital Selective Calling (DSC)?

• A. It is a data communication system intended to provide automated distress alert information over the radio
• B. It is a satellite navigation service
• C. It is a weather data service for ships
• D. It is a voice channel for general ship-to-ship communication

Answer: (A)

DSC is a digital selective calling system used in maritime radio to send preset digital messages that identify a vessel and, in distress, automatically alert other stations and rescue authorities. It’s part of the GMDSS suite, designed to get a rapid, automated distress or safety notification through even if voice channels are busy. The system uses the vessel’s MMSI and can include position information from GPS, enabling quick acknowledgment and relay to coast stations and rescue centers. It’s not a satellite navigation service, a weather data service, or a general voice channel for ship-to-ship communications.

DSC is a digital selective calling system used in maritime radio to send preset digital messages that identify a vessel and, in distress, automatically alert other stations and rescue authorities. It’s part of the GMDSS suite, designed to get a rapid, automated distress or safety notification through even if voice channels are busy. The system uses the vessel’s MMSI and can include position information from GPS, enabling quick acknowledgment and relay to coast stations and rescue centers. It’s not a satellite navigation service, a weather data service, or a general voice channel for ship-to-ship communications.