If I recall correctly, I believe I saw two permanent lines tied off to a tree limb at 20 ft in Harvey's Sink when I dove it for the first time about a month ago. It appeared one line went deep quick and the other line went under a ledge. But in the main trunk section of the cave, there was only one line. Obviously, I did not see these two beginning lines until the end of my dive, otherwise I would have followed one of them and have the answer to my question.
But here's my question. Which one is part of the main line for the system? And where does the other one go? Just to the bottom of the basin?
If I was narc'd at 20 ft on 32% nitrox, then forgive me, but I'm almost sure I saw two lines.
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