What was the Ark really like?

Yesterday I posted pictures of the ark - two versions - and I know some of you must be wondering, which is the correct one? Personally, I believe that the first model is more plausible because the people of Noah's day had never seen a boat or ship before in their lives.

When God created the Earth, there was a firmament around the planet and thiis firmament was like a thick layer of moisture and ozone (the greenies would love this) and because of the moist atmosphere, there was no necessity to even rain as the place is perpetually damp and perfect for vegetation. So when Noah was constructing the Ark, the people around him were very curious and I am sure they would have laughed their heads off when they heard Noah saying that God will judge them with a flood from 40 days of continuous rainfall. "What is that?" I can almost hear them asking.

So if they had never seen a boat before, how would Noah know that the Ark needed a keel and ribs to support the outer structure? So I find it hard to imagine that Noah built the second version.

But why the first version is likely? For one the scriptures tell us that God told Noah to build the Ark and at the top to build windows that look out and there were no dimensions given for the total length of all the windows and so all the windows added up was as long as the Ark itself. Also the Ark was box-y in dimension because the tools that Noah had were probably makeshift ones - certainly he did not have those fanciful wood planes that modern day carpenters all pride themselves with.

So my pick is the first model.... agreement? or disagreement? leave your comments please!