The book of Genesis tells us about the Ark that Noah was instructed to build to save his family and the seed of all air-breathing creatures of the world from a world destroying deluge of water.  The spatial dimension and design of Noah’s Ark are a remarkable testimony to the internal consistency and rationality of the Bible and the inspiration of its writers.  There are a number of oral and written accounts of the great flood and the salvation of man among the heathen peoples.  These accounts abound with absurdities.  The Babylonian flood account speaks of the Ark as a perfect cube 120 cubits in each direction and with nine decks.  This design betrays complete ignorance.  Such a vessel would spin slowly around.  The God-revealed dimension recorded in Genesis leave nothing to be desired; they are both reasonable and appropriate for the Ark's purpose.

The Ark was designed to carry a large cargo and remain stable and upright during a great storm and a year long flood.  Tests have shown that the Ark was well designed for its purpose.  The Ark was designed as a box 300 cubits long, 50 cubits wide and 30 cubits high.  A cubit was the length from the tip of a man’s middle finger to his elbow, about 18 inches. This means the Ark was 450 feet long, 150 feet wide and 45 feet high.  These dimensions gave the Ark both stability and a great carrying capacity.  These proportions were used by Peter Jansen of Holland to build Danish barges called Fleuten.  They proved to be an excellent design that  had a great carrying capacity because of their flat bottoms and were almost impossible to capsize.  During the filming of the film In Search of Noah’s Ark, a scale model of the Ark was tested in a large wave tank at Scripps Institute of Oceanography at La Jolla, California.  Giant waves were produced in the tank by a mechanical wave generator.  The Ark proved impossible to capsize.  The designers of some of the giant oil tankers of today have used proportions very similar to the Ark's in their ships.  These modern shipbuilders have the accumulated knowledge of many generations to draw upon.  Noah had blue-prints from God.

The dimensions of the Ark were also sufficient to save the thousands of kinds of air-breathing creatures that God ordered to be preserved.  The area of the Ark’s three decks was 101,250 square feet.  Its total volume was 1,518,750 cubic feet.  This is equivalent to 522 modern railroad stock cars.  These cars could hold about 125,280 sheep.  A barge of such gigantic size with built-in compartments would have been sufficiently large to carry all the animal kinds on only half of its available deck space.

The size of the Ark constitutes a strong argument for the divine inspiration of the Book of Genesis, for if Moses had simply invented the story or had revised some current flood legends, he could not have described the Ark in the way we find it in the Book of Genesis. He could not have known how large of a structure would have been necessary to carry the vast number of animals that recent discoveries have found to be in the world.

How did ancient Noah receive his knowledge?  How could a man like Moses have written such a logical and reasonable account with his background as a shepherd?  The Bible itself tells us.  Noah was instructed by God, and Moses was guided by the Holy Spirit.