even with a survival suit, you can only last in this kind of frigid water for so long, unless you are thinking they have some other kind of suit that i'm not so familiar/aware of. even so, they are risking their lives, to save your life, there are other dangers beside the fact of it being cold water. what if they slid under the ice?
what if someone cracked the ice and got smacked on the head and went unconscious, under the water?
there are many things that could happen that you wouldn't want to think about.
lew, i'm glad you made this post. thank you.