Bobsprit wrote:

Do you have an answer?

That sort of depends. Is an IACC boat ( ~ 78' LOA) an 'open
sailor?' If not then an A-scow (37') definitely is. The largest
open sailboat ever built that I know of, with no cabin
accomodation whatever, was the America's Cup defense contender
'Independence.' She was not as large as 'Reliance' but IIRC
Herreshoff's 'Reliance' (203' LOA) had a bit of a cabin.

Fresh Breezes- Doug King