Also note that Studio Bricolage was intending to put a non-submersible submarine out into the lake near the course as a gimmick. They were going to build it on a platform of canoes.

For the record, I am not likely to ever sign on to man a "homemade" submersible. I had a bad experience with a trash can and a hose once.

Seriously, though, the pilot(s) of any hobbied-together "submarine" like this would need to rely on scuba gear.