A Homemade Submarine Dennoch is a homemade two-person submarine. The sub originated as a design project by Standford University mechanical engineering students Scott Anderson, Mark Brosius, Scott Charmness, and Tony Stone. An adjustable latch maintains pressure on the O-ring seal to prevent leaks at shallow depths.
Water pressure keeps the hatch sealed once the vessel passes below fifteen feet.
To prevent optical distortion, they were formed at a high temperature and cooled very slowly over several days. A thin polycarbonate coating protects against small chips and cracks that could develop under the stress of a deep dive. These tanks also provide additional buoyancy on the surface. The tail structure serves a dual purpose. It protects the hoses exiting the rear of the submarine and maintains stability during rapid accent.