Well then you can thank Eric The Red, or was it his son, Leaf, (actually it might have been one of his brothers). "Back when explorers could dabble in real estate." as it were. Funny thing is, just used a sieries of lectures on this topic as a soporific.
Your memory is fine. To me that is an upside-down canoe, the two sets of ribs that are exposed are definitely curved. Doesn't look like a paddle board.