John Bantin
Contributor
During the 1990s and 2000s, I repeatedly took groups of divers to that depth to compare the performances of a range of regulators. We used air because it was the most challenging gas for a regulator to deliver. They each made detailed notes at that depth that independently corresponded to the findings of the others. Nobody even suffered narcosis because I always chose COMPETENT and experienced divers. We did the same with computers, to get true comparisons of in-water performance. Some readers complained that we did it in the Red Sea so one February we went to northern Sweden to do it. It was colder, that is all!Diving to 60m (~200’) on air?
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