You are viewing a single comment's thread from:RE: How to Build a Diving Helmet: Underwater Exploration On a BudgetView the full contextcecbdo (48)in #technology • 8 years ago -doesn't look very efficient on air, but fun to read about.
It isn't! But then, it doesn't need to be. The air does not come from scuba tanks after all, but from an electric air compressor on the surface.