That photo was taken in the 1980’s, at which point the question becomes how long had they had outboards available to drive the dugouts and how that had affected the form?
Not much at all I suspect, I don’t recall ever seeing one inverted but if inside geometry refects the outside the hulls were rounded. Not real stable I’d guess but the gunwhales down each side were wider and squared off on the lower outside edge relative to the curvature of the hull, leaving about an 18” flat surface on the outside that was usually painted and decorated.
Might be the purpose of the extra wood around the top of the sides was buoyancy and stability.
Their paddles were long with blades shaped like forked fish tails. Didn’t hardly use these much at all other than to beat netted sharks on the head.
"...if the gentlemen of Virginia shall send us a dozen of their sons, we would take great care in their education, instruct them in all we know, and make men of them." Canasatego 1744
