[quote=boatbore][quote]only one hull is submerged[/quote]
I'm in the processof refreshing a 1980 dart 20 (same as the 18 but bigger). There are bulkheads at the cross beams with weeping holes at the bottom and a larger airspace at the top. The middle and forward sections have double sections of 4" thick Styrofoam separated by a 4" air space and 6" below the deck, lots of buoyancy that also stiffens the hulls.
I'm curious to know how submerged is the hull with this much Styrofoam?
To drain the water you have to get the bow as much as 6' higher than the stern (because of the shape of the hull) in order to pump all the water out, or turn it upside down.
I've replaced the very poor quality port with a 6" beckson, and added 2 more middle and forward ( I like access)[/quote]
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