Well, I don't know anything about Kelp but I do know that sometimes unplanned stuff happens. My girlfriend and I surfaced one time in a squall with no boat in sight. Swells were about twenty feet with white caps, lightning, wind and we were both low on air. It was just a squall, a little localized storm but inside of it, it was wild! We floated on our backs part of the time but ran out of canned air so we switched to snorkels and floated on our chests. The waves kept breaking over us and I honestly think that had we not had snorkels, it might have ended badly instead of having a neat little adventure. We floated for over an hour before we heard the boats horn and I popped a flare. Stuff happens when it happens!