Hi,
We do it here mostly like summer, but with few exceptions.
We have one line down. But we have extra 1m piece of rope. Everytime diver goes down, he attaches himself to the line with that piece of rope.
Then you just dive down and enjoy.
There must be also a "safety switch" if that rope sticks somewhere somehow. With that safety switch you must be able to release yourself quickly from the rope. You can buy those "release swithes" from stores that sell all king of boat and sailing things.
This was introduced to us by Jean Michel Pradon at ibiza. Thank you for that
-Antti-
