My answer here is the same as my answer elsewhere. I have done ONE. I would do it again. My criteria for doing a visual jump are that it should be extremely easy to find a line in zero viz, and ANY line I find should bring me out within my gas supply. There aren't very many places that fit that description.
If I scootered in caves with very high flow, I might eventually change my stance . . . but I doubt it. David Rhea, who taught my C2 class, says he's the object of some ribbing from his friends, because he runs a reel or spool everywhere, every time. If it's good enough for David, it's good enough for me.
If I scootered in caves with very high flow, I might eventually change my stance . . . but I doubt it. David Rhea, who taught my C2 class, says he's the object of some ribbing from his friends, because he runs a reel or spool everywhere, every time. If it's good enough for David, it's good enough for me.