KenE
Contributor
I have been on several boats that hang 100% O2 on the safety stop bar. I have seen it used twice, the first time I was not informed of the reason, so can't comment. The second however, I was aware of, I was diving with a father and son and the son had a free flow at about 100' freshwater. Both dad and son panicked and went to the surface much too fast and I could not get them to slow down, but I refused to rise that fast. I was left alone and surfaced as trained deploying a dsmb from safety stop so boat could find me. We were at the opposite end of the wreck from the mooring line. Both father and son were put on the O2 for 15 minutes to minimize effects of rapid ascent rate. Fortunately both were OK but were done diving for the day. So, my point is that for safety reasons I believe the O2 is beneficial, I don't believe it is wise to use for deco or safety stop without proper training. Just my 2cents.