The flood and Noah's Ark?

The first problem to address is the size of the boat. A wooden watercraft of that length would tear itself apart under it's own weight, not to mention the weight of it's cargo. Most scholars believe a cubit was 18 inches (some say 20 inches). That would make the ark 450ft long. The largest all wood seafaring vessel ever made had a hull length of 335ft (not counting the jibboom), it was plagued with structural problems, leaked due to the flexing of the timbers, required pumps to pump the water out of the hull constantly, and reached the limits of a wooden vessel's size. Noah's ark is an impossibility, a vessel that size needs steel reinforcements in order to float on calm seas, it would be impossible in the stormy seas of the flood waters.