User blog comment:USS Enterprise CVN-65/UAC Dawn Under Heaven/@comment-27820070-20140913032004

Enterprise, using 20*20*6 and 10*10*4 for the ship is good for toughness, but bad for the overall resistance. So it might be 2.1 million, but the blocks you use will lead it to a small 1.2 million toughness LEGIT. The amount of guns are a factor too.

Thats why everyone uses 24*10*2 blocks.