What do you think is the deepest(physically possible) to freedive to?

[MozSpearer]

Hi there.

I've been speculating for a while now. What is the deepest that it is physically possible for a human to freedive to. I'd like to hear what you guys think. This thread isn't to talk about our own depth records, but of those like William Trubridge and especially Herbert Nitch.

Just express your opinion. THis thread doesn't mean that I'm gonna push my limits and don't want to encourage others to do it. The reaction on my last thread of ''what's the deepest dive you've done'' has made m more cautious as to how I post.

Cheers. Mozzie

 

[cdavis]

Given today's techniques, Herberts last dive is probably near the maximum. DCS and particularly narcosis seem to be the most important limiting factors. FRC offers a way to get around DCS and narcosis. Maybe, if they figure out how to do max dives FRC, deeper is possible. We will have to wait.

Same thing with CW, but maybe a modest increase is possible from todays records. It is probably significant that no world records were set at Vertical Blue 2014.

Connor

 

[MozSpearer]

Thanks for your reply Connor. Sorry I'm so stupid but what is FRC? I think Herbert also maxed out on his last attempt. But who knows, maybe he'll surprise us, even though he got DCS. I believe there's room for improvement in CW. Trubridge nearly got his record again, but at least he knew when to call his safety divers for help.

As you said, we'll just have to wait and see. Before Nitsch made his debut, I think a lot of people thought that the limits have been reached. But seemingly he's reached his limit, but perhaps in the future another person will break hīs records.

We'll see. Thanks for your post. Cheers. Mozzie

 

[cdavis]

FRC,Functional residual capacity, or, the amount of air in your lungs after you exhale simply by relaxing. In general use, it means diving with substantially less that a full breath. One third to just over half a lung full is usual. Diving very deep with it will require some serious chest flexibility and there may be a wall created by the lower O2 storage, but taking down less air reduces narcosis for sure and, I think, DCS.

I dive about half lung. Great for my kind of diving, much better DR, longer, more comfortable dives, should be safer, but quite restrictive on my depth ability.

On the subject of records, the sport is small and young. The best divers have a genetic gift. It seems unlikely that the persons who are most geneticly gifted have become divers or done the training necessary to obtain a world record. Given time, I'd expect some increase, especially in CW.

 

[MozSpearer]

Thanks for clarification. Sounds like a good plan. But you'd probably get oxygen deprived sooner than when on a full breath. There is definetly a fine balance between amount of air intake and DCS. Some definetly have better capability than others. Thanks again. Cheers

 

[cdavis]

"you'd probably get oxygen deprived sooner than when on a full breath."

Interestingly enough, for serial dives of normal length, diving exhale correctly results in substantially more O2 available to the brain, not less, especially in the later stages of the dive. The reason is a much stronger DR and less exertion on descent. That might not be true when you are talking very deep, very long dives. DR is going to be very strong anyway and the lower O2 storage might result in the diver essentailly running out of O2.

 

[Kars]

My guess is that William Truebridge is very near his CNF limit. I was surprised to hear that for a TV a 107m was mentioned - if I recall correctly.

Alexey is in the 90-100 region in CNF, let's see if he can get closer Will's 101. Maybe someone will do 105-110 in the next 10 years, but I expect not more.

for CWT I believe we can expect at least 10 meters more the next 10 years if the athletes manage to have enough financing and training. So 136 / 140 should be in the cards.

For pool I believe 300m DYN is in the cards in the next 5 years, and 325 in the next 10.
DNF, 250 within the next 5 years, 270 for the next 10.
Static competition, I do not expect much competition growth because it's not a popular discipline. I still hope Branco Petrovic can surpass the current WR at a WC. He already has done over 12' for a Serbian National Record. Also Goran may reach that level, though I suspect he likes the 300m DYN more.

I do not know about NL, but the VWT is something that may offer some space for improvements, I Believe that 175 should be attainable the next 10 years.

I think the time is there that athletes need to specialise and dedicate at least a year at 1 discipline to be able to have a WR chance, provided they already are very close to the WR level.
The chess game of knowing who is do what for training is maybe already going on?
Is Martin Stepanec working on some new record? - would love to see another record by him.

But we'll see, I'm still amazed about 100m CWT dives, and now more and more people are reaching that it's still amazing.

On the FRC method, I think it exposes some important dive principles, namely how important it is to take that static like low metabolism down. I expect that when divers succeed to do that with full lungs (less or no packing) they'll benefit from it's principles, while still be able to have enough O2 for long dives. Also suits are getting thinner, and people use less weights, which helps a lot. I expect the in-water preparation to become less or disappear. This in favour of keeping the body warm, so the diver can have a really thin suit just enough for 1 dive. (I've done this in Sweden years ago, and it worked great, NR 65m). Actually talking about this makes me want to pioneer this approach further.

Buddies wanted

 

[MozSpearer]

Thanks for your reply Kars. Just finished checking all my threads. I also expect some improvements in the future, pool disciplines are quite likely to see improvements in records. We are constantly seeing records being broken. As for sea dives there should also be improvements, but one day we'll get to the limit that someone can dive too.

I suppose there will also be a depth where blood shift can no longer occur because all blood will already have shifted. Thanks for your input. Cheers. Mozzie

 

[Kars]

About Bloodshift, I think one has to see it more that it cannot be increased beyond a 100% it's not like at 50 it's on, and at 51 it's off

If I recall correctly Bill Stömberg expected that in the future speed is going to play a bigger role in human powered deep dives.