Wow, that is impressive. It’s amazing that they don’t take a small emergency tank of O2. I can’t sit here in my house and hold my breath that long.
“It’s amazing that they don’t take a small emergency tank of O2. “
I think they have safety divers but still drown. They have small tanks but they wouldn’t provide much air at 300 feet. Maybe one breath.
I read that one of the training techniques they do on land is to breathe in, then hold for a minute, and then start walking until they have to breathe again. Some divers can walk nearly 1/4 of a mile before having to take another breath.