Originally Posted by willk
They are an open scupper (but below the waterline, so really just a HOLE) with a flexible hose on the outside. The rods are actually taut cords which are used to pull the hoses upright above the water level.
They are thus watertight at rest but can be rapidly deployed while underway to passively dump huge volumes of water in seconds.
You know you want a pair
I certainly do want them, if it makes boating safer. I will look into it. However, I don't think I will be banging away on rough days. Not on Lake Erie anyway. Now, if I were back living on the Chesapeake Bay, maybe. Thanks for taking the time to answer. I like the way you have the compartments in the fore on the tubes. It is another thing I will look into to doing. Where did you get them?