An age-old question: ways to 60m.

[OTF]

Consider how often you plan go to the full depth. If it's only a couple times year (with lots of shallower diving) then burning through a few expensive OC helium fills for the deep dives will actually be cheaper. Maintaining a CCR is expensive in both money and time.

Conversely, if you plan to travel to exotic places where helium is extra expensive and do 10 day stints of repeated deep dives, the CCR might pay for itself in a trip or two.

 

[Celt]

People dive for all sorts of different reasons, for us it was to get to and salvage cargo from the WW1 wrecks on our doorstep, and most use the gear and gas that’s common to them. For me and my buddies it was and is air as it was simple and plentiful. The side effects of using air deep were incidental and frankly we didn’t give a rats ass once we were successful in bringing cargo to the surface. I actually can’t think of a single time when someone complained about the effects of air deep. It was simply par for the course.

 

[CG43]

Some people do better than others on deep air. I just suck at it. My fairly hard limit for air is 165' and I'd rather do anything deeper than 150' on mix. Yes, it's expensive. But I can think on mix when I can't on air at depth. At 165' I'm probably marginal on skills like tying shoelaces. At 180' I think I'm tying *perfect* knots for which it would be miraculous if they held at all in still water.. I have Extended Range. It's a useless cert, for me

That makes me curious .
What was your training in relation to yourself ?
How to move, especially how to breathe or what mental tricks did you learn ?
Anyway, your training was probably not very successful . The question is why ?

Then I read for example from Hal Watts that he trained 55 diver to depths between 100m and 127m without a single accident , or Brett Gilliam , or Raimondo Bucher or my own experience then successful
deep air training is possible .

 

[ofg-1]

Then I read for example from Hal Watts that he trained 55 diver to depths between 100m and 127m without a single accident .

Hal lost 2 divers in Mystery Sink Orlando within 5 days of each other, and he had a serious case of DCS. They took him to Canaveral AFB for treatment. This was in 1970 or so.

 

[TrimixToo]

That makes me curious .
What was your training in relation to yourself ?
How to move, especially how to breathe or what mental tricks did you learn ?
Anyway, your training was probably not very successful . The question is why ?

Then I read for example from Hal Watts that he trained 55 diver to depths between 100m and 127m without a single accident , or Brett Gilliam , or Raimondo Bucher or my own experience then successful
deep air training is possible .

If you expect me to remember the details of a class I took 20 years ago, you're barking up the wrong tree. I'm lucky I can remember what I had for breakfast.

I have yet to have a diving accident, even when training for ER or later diving air deeper than *I* ought to. I hope to continue that streak. For me, doing that means setting limits on the depths I dive using air. If you choose differently, that's up to you.

 

[leadduck]

Bret Gilliam's world record deep air dive to 466fsw is described here:

https://bretgilliam.com/assets/gilliam-world-record-deep-dive.pdf

Some seem to miss that workload plays a big role. As long as you're completely relaxed like Bret Gilliam, deep air can work without much impairment. Of course some people are more relaxed than others, you can get more relaxed by training, you can notice the onset of symptoms and ascend.
A typical deep air accident victim is a diver who has many deep air dives' experience, but on that one dive an unexpected problem such as a regulator freeze occurred at depth. Stress and sudden workload increase, while high WOB due to high gas density increases ppCO2; narcosis hits him fast and hard, followed by an uncontrolled emergency ascent from 200fsw.

 

[rjack321]

Bret Gilliam's world record deep air dive to 466fsw is described here:

https://bretgilliam.com/assets/gilliam-world-record-deep-dive.pdf

Some seem to miss that workload plays a big role. As long as you're completely relaxed like Bret Gilliam, deep air can work without much impairment. Of course some people are more relaxed than others, you can get more relaxed by training, you can notice the onset of symptoms and ascend.
A typical deep air accident victim is a diver who has many deep air dives' experience, but on that one dive an unexpected problem such as a regulator freeze occurred at depth. Stress and sudden workload increase, while high WOB due to high gas density increases ppCO2; narcosis hits him fast and hard, followed by an uncontrolled emergency ascent from 200fsw.

Yeah the Rouse's would like a word about deep air being "safe"

 

[NothingClever]

This just doesn’t stir any emotions for me. What’s the point of a bounce dive?

Going the opposite direction, oxygen free ascents in mountaineering are a different story. I think those are a lot harder to achieve.

Also, I’m not sure I buy the assertion of no narcosis. I think that’s an aspirational claim rather than a reality.

 

[Blackcrusader]

. Dives to 40m are routinely done on air and noone is dying left and right.

Just in Fuvamullah Maldives and dives to deeper than 40m were done often. They only have 21% there.

This Thresher shark video was taking at around 43m deep. Thresher at 55 - 60m deep I also did exceed my NDL with a short deco obligation that was cleared during the dive. Many other divers did the same dive with deco with one diver going to 55m depth.

 

[Centrals]

Just in Fuvamullah Maldives and dives to deeper than 40m were done often. They only have 21% there.

This Thresher shark video was taking at around 43m deep. Thresher at 55 - 60m deep I also did exceed my NDL with a short deco obligation that was cleared during the dive. Many other divers did the same dive with deco with one diver going to 55....

Nothing to write home about such trivial dives.