At the diamond iceberg Anna, the freediver, oriented on my safety line that leads her to the icehole. We had no safety divers. It was just Anna and me. I was on scuba and watched her carefully as she was going up and the guy on the ice got a briefing what to do in case of a black out.
Anyhow, it is a very impressive performance, mentally and phsycologically. Imagine beeing in minus degree C water temp under ice on a breathhold, finding the way back to the icehole, first searching for me in this twilight, looking where the safety line is pointing, maybe you cant see it right away, trusting this is the proper way back. At the big iceberg on some spots the chunks of ice were so packed she cant move them away, she had to swim further and try it again. She is something!