An 18-year-old high school student has built a submarine that he can dive in out of parts he found lying around his parents’ New Jersey summer home and ordered off the Internet.

Why?

“It is just generally what I do,” Justin Beckerman, who starts his senior year next fall at West Morris Mendham High School in New Jersey, told NBC News. His list of previous accomplishments is equally impressive, ranging from homemade remote-controlled vehicles to artsy mixed-media sculptures.