No, I'm positive. There are chambers. I can be holding the bag over the side of the boat, with a drain valve on the bottom...and even though I can feel tons of water in there (like 60+ pounds worth), nothing comes out. And I've used tons of ballast bags before...I swear I'm not retarded! Anyway, I'm going to contact LaunchPad and see if maybe they know what I'm talking about???
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