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Tongue River Cave Siphon Dive

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Published on Mar 22, 2009

I did the duck under sump dive to find that only a small pocket of air existed on the other side, air tanks are needed to dive the hole sump. We did this safely and in small steps, I didn't just dive under right away. I first looked in using a snorkel, then dove under the wall and looked up to see air, finally I dove into the air pocket. I came up into about 1 foot of air and came back before I breathed it all in.

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