DSC stands for which of the following?

• A. Digital Selective Calling
• B. Digital System for Calling
• C. Direct Signal Communication
• D. Digital Selective Channel

Answer: (A)

DSC is a digital method for initiating and addressing radio calls in maritime communications. It stands for Digital Selective Calling. This system uses unique identifiers called MMSI to address calls to a specific vessel, a group of vessels, or all stations, enabling automated call setup, distress signaling, and emergency notifications. It improves speed and reduces miscommunication compared with voice calls, and it operates on VHF, MF, and HF bands as a key feature of GMDSS. On VHF, DSC provides a dedicated digital procedure that can trigger distress alerts and establish a link to nearby stations and rescue authorities with a single action. The other terms listed aren’t standard terminology for this capability, making Digital Selective Calling the correct designation.