Cubits. — The cubit is the length of the arm from the elbow to the tip of the middle finger. As, further, it was regarded as one-fourth of a man’s height, we may safely compute it at eighteen inches, except where the sacred or longer cubit is expressly mentioned. Thus the ark was 450 feet long, 75 broad, and 45 in depth. The Great Eastern is much larger, being: 680 feet in length. However simple her construction, there would be great difficulty in building so large a vessel, from the danger of her breaking her back, especially in the tempestuous weather which followed.
Related Commentaries of Genesis 6:15
Genesis 6:15
15 And this is the fashion which thou shalt make it of: The length of the ark shall be three hundred cubits, the breadth of it fifty cubits, and the height of it thirty cubits.