I have three bildge compartments under the floor boards. They do not appear to be connected so that water moves from one to the other. There are holes in the bulkheads near the bottom and water appears to enter the rear-most cavity from some sorce, but not from the adjacent compartment. I am hesitant to drill a whole where I cant see what I will be cutting through. Just wondering if anyone else has this situation and why they don't drain into each other. I only have a single bildge pump and its located in the center cavity. Any thoughts will be appreciated.