Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
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.