The US submarine Nautilus.

That would be Jimmy Carter. He was a graduate of the US Naval Academy. He served in the nuclear navy before getting out to run the family's farm.

The first nuclear powered submarine was the U.S. Navy's USS Nautilus, SSN-571. A link is provided.

Royal School of Naval Architecture was created in 1864.

Naval architecture typically refers to ship designs and construction. See the related link for naval architecture information on a variety of different ships.