Like I said it was a f/g dinghy. Under 10’.
Added two inspection ports to do it (and one for another modification) wedged them down within the hulls freeboard so when we were overloaded it helped with buoyancy. It did work because we did before and afters.
It wasn’t significant but it did help. I got the idea from multihull cruisers (28’+) doing it to their watertight chambers and/or non fore and aft ends for less pitching (but that’s a whole other thread).