How to Decompress Your Dry Bell for Long Dive

Diving bell is pressurized to the level at which the dive will happen, right? So your dry bell, which is that both of these guys on the screen, this is, it's a diving bell that has a hatch at the bottom. The time of the time Dave Courtney did his highly illegal saturation dive. We'll get to that in a second. Diving chamber so that divers could remain at high pressures for a long period of time.