Aircraft Carrier Submarine

The way to do this is first to build a large, and I mean, large sub, longer and wider than the runway. After finishing constructing your sub, you can either put one runway on top of your sub or two runways, one on each side. Note: when placing runways, make sure your sub stays balanced otherwise it will tip over.

U.S.S Alligator

U.S.S Alligator

The USS Alligator, the fourth United States Navy ship of that name, is the first known U.S. Navy submarine, and was active during the American Civil War. The first American submarine, built in the Revolutionary War era, was the Turtle; however, the U. S. Navy did not exist when this craft was operational.     - I put a link so you can read more about it please click on the U.S.S above-