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A comment on The Disappearance of the World’s Greatest Free Diver. Parent comment

Re:The Disappearance of the World’s Greatest Free Diver by fabrice_d on Saturday August 08, 2015 @12:13PM (#10027692)
We don't know what happened to her exactly, but if she had an issue while being still deep (more than 20m) that would have been very hard to spot for a buddy, and even harder to do a rescue. She was not alone by the way.

The only way this could have been totally safe would be to dive along a line, using a lanyard to not drift away. This is the setup used in all competition or deep training and this has prevented many casualties.

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Re:The Disappearance of the World’s Greatest Free Diver by abandonliberty on Saturday August 08, 2015 @12:34PM (#10027777)
Still speculative, the original article mentions a lack of spotters and an io9 article mentions a depth of 30-40m.

For her this was child's play: freediving gets exponentially harder the deeper you go. She could've decided to go exploring a bit on the bottom - at that shallow depth she'd have 2+ minutes of bottom time.

With ~5 days of training, a person can get to 30-40m. Then it becomes harder (e.g. the air in your lungs gets squeezed to a smaller volume than a complete and total exhale)

http://io9.com/well-probably-never-know-what-happened-to-fre...

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