Phil Gillette over at Skeptic Friends has written up the logistics of the Noah's Ark story. In practice:
I'm just taking what they claim and agreeing it to death.
Some folks have tried to simulate the ark, and found it rather difficult to build:Let us begin with simple logistics.
The Ark is alleged to have been somewhere between four and six hundred feet long, depending upon which version of the cubit one might prefer — there were several in use at the time, varying widely in dimension. A vessel of this description is not all that easily built.Bit of a problem there. For more of the interesting problems with the Noah's Ark myth, head on over and read it yourself.
It would require saw pits, smithies, foundries, rope-walks, cranes and other heavy-lifting devices, and all of the other facilities found in a large, early shipyard. It would have required a master shipwright and a construction crew with experience. And it would require a vast amount of timber to be harvested and processed in a land not noted for its forests. And lest we forget, in the days of the Ark there was little more than Bronze Age technology.
The largest clipper ship ever built is said to have been the Great Republic. She was somewhere, depending upon whose account you read, between 320 and 350 feet long with quite a wide beam to increase cargo space. She was relatively slow and in spite of oak construction, iron bracing and multiple keelsons, her hull hogged and sagged enough to render her a chronic leaker. She was only moderately successful and ultimately was lost in a tropical storm when the sea came in through her sprung hull strakes. There was some 15 feet of water in her holds when her crew abandoned her.