Race to the Depth, Slow descend vs Fast descend

[Remy B.]

John, even with their vast experience, they went beyond the Standard PPO of 1.4 and even 1.6, what they don't understand is they were teaching Deep diving Rec specialty, in that course they teach you air management and the relation between depth and air usage, they just plain and simple ignored all what they preach, air have a recommended 57m PPO pushing it 66m, even that it is not recommended, US NAVY had allowed 85m PPO if I'm not mistaken, apparently they went far beyond that as well.

( if any one knows the US NAVY the PPN, please share it with me )

If I'm not mistaken NOAA set the standard of Max 1.4 and over Max 1.6PPO non working after there own research, and that is what all agencies ( or at least most ) adopted, the question is why they exceeded the Standards.

It seems that those 1000's of dives give them special powers in there minds and chase their own death.

Even with my lack of experience, I stay inside the standards, I just apply what I learned, or even put tighter standards where and when I can.

 

[archer1960]

I can relate a lot to what happen with your Student on a Dive to 55m about two weeks ago

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6. His decision to immediately abort the dive was 100% correct.

I probably failed in this, I was taught to try to solve the problem and if it didn't press then the abort bottom, after emptying my lungs I felt in control again, but maybe it was better to press the abort bottom first.

7. The importance of a solid team, effective communication and disciplined protocols in preventing the issue escalating into a more serious incident... especially in regards to respecting and acting without hesitation upon the principle that 'any diver has the right to abort any dive at any time'.

I fail in this one, I had anxiety event on all fast descends, but never had the Tunnel Vision, and when I reach target depth I go to my normal breathing on all those dives, and was wrongly expecting the same for this one.

If I had communicated this to my buddy maybe he had thought to approached differently.

At the end we missed the initial target of 50m due to the current.

IMO, there's nothing wrong with taking 15 sec to try to resolve the problem before making the decision of whether or not to continue the dive. If a deep breath fixed things for you, then continuing was ok.