For recreational boaters, DSC has 2 important advantages.
In an emergency situation, where you are sinking or having a medical emergency, the panic button on the VHF will broadcast to all stations an alert and the shore side (USCG) stations will receive the information that is associated with the boat's MMSI.
While I have not had the experience, I've heard stories that freighters and other commercial vessels do not always respond to generic calls, however, they do respond to direct calls on DSC or when hailed by vessel name.
A third advantage, albeit not as important is the ability to have a group of MMSI numbers. With the group feature it is possible to hail multiple boats at once. This could be handy when a group of boats are traveling together, one hail, everyone is notified.
In an emergency situation, where you are sinking or having a medical emergency, the panic button on the VHF will broadcast to all stations an alert and the shore side (USCG) stations will receive the information that is associated with the boat's MMSI.
While I have not had the experience, I've heard stories that freighters and other commercial vessels do not always respond to generic calls, however, they do respond to direct calls on DSC or when hailed by vessel name.
A third advantage, albeit not as important is the ability to have a group of MMSI numbers. With the group feature it is possible to hail multiple boats at once. This could be handy when a group of boats are traveling together, one hail, everyone is notified.