I've dived at the Blue Hole mentioned, in Dahab. Scuba, but was out with freedivers too. Also Swedes. It's a beautiful yet chilling place, with gravestones lini

I've dived at the Blue Hole mentioned, in Dahab. Scuba, but was out with freedivers too. Also Swedes. It's a beautiful yet chilling place, with gravestones lining the surrounding rock walls. Divers who didn't come back. Macho Russians saddling up multiple tanks of helium to reach seldom seen depths. Read some of their literature, the freedivers, participated in some of their training sessions and saw first hand how they have completely mastered their oxygen requirements. It's quite something to be able to swim unaided for several minutes at a time. Lots of reports of peacefulness and relaxation. The closest I can get is when snorkelling, dipping under for a while. Not a patch, I'm sure.