Marty wrote;
"Rowboats have crossed the Atlantic so there is not need for a discussion that semi-displacement or planing boats are not qualified to cross big open water."
Any rowboat that would cross the Atlantic will be beyond any doubt a FD boat. And for that matter any rowboat that's actually a rowboat will be FD. Any boat designed to row must be efficient enough to get along well with just human power. Usually only one or two humans. With that small amount of power only FD boats need apply.
I exclude multi-purpose boats that are sometimes or even fairly often rowed like an aluminum skiff ... But they are not rowboats.
Actually the only need for something other than a FD hull is the need for speed and that usually isn't a "need". Most trawlers would be better off if they all were FD.
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Eric
North Western Washington State USA
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