Really? So how does the CG identify which vessel they are directing the comments/questions to? They simply go back and forth like two bass fisherman on 68? What happens when a third or forth vessel gets involved? Hard to believe.
Seriously? If they don't have the information from the original hailing, then they ask the vessel to identify themselves and their location. How hard is that?
Also, if you've listened to VHF in a busy area, CG will call for radio silence except for them and the hailing vessel during an emergency. When people chime in by accident, they will reiterate the radio silence.
What's hard to believe is that although you've started this thread with a question, and experienced people have given you answers, you act like a troll in your own thread. Is your goal to annoy people? You don't seem very satisfied with reasonable answers to your OP.