Question Solo Cert for Technical Dives?

[SpaceX Aquanaut]

i read somewhere that most diver separated from the group had usually their tank almost full and the cause was not direct and OOA situation but most likely panic that lead to hyper ventilation or similar.

I have never heard anything remotely like that. It isn't close to true in any of the cases I know.

Not resulting Solo Incident caused by Buddy Separation, but panic with hyperventilation:

Scary stress reaction in an experienced cave diver and Scuba instructor, after a wing inflator detachment malfunction and an active physical exertion kicking ascent to surface with double sidemount cylinders, further compounded by surfacing in a potentially low oxygen/high inert gas asphyxiant ambient environment.

Note the classic symptoms of hyperventilation, work-of-breathing, and finally panicked rejection of a working and functional 2nd stage regulator by the victim ("Can't get enough air out of it. . .!"), which is one of the major irrational cognitive signs of a distressed diver in Hypercapnic Alarm Response:


The "air hunger" or "air starvation" instinct is a powerful driver, and a harrowing enough motivator that can potentially make you do irrational things like reject a regulator, or hold your breath on a panicked ascent to the "easier breathing" air of the surface. . .

 

[Celt]

Not resulting Solo Incident caused by Buddy Separation, but panic with hyperventilation:

Scary stress reaction in an experienced cave diver and Scuba instructor, after a wing inflator detachment malfunction and an active physical exertion kicking ascent to surface with double sidemount cylinders, further compounded by surfacing in a potentially low oxygen/high inert gas asphyxiant ambient environment.

Note the classic symptoms of hyperventilation, work-of-breathing, and finally panicked rejection of a working and functional 2nd stage regulator by the victim ("Can't get enough air out of it. . .!"), which is one of the major irrational cognitive signs of a distressed diver in Hypercapnic Alarm Response:


The "air hunger" or "air starvation" instinct is a powerful driver, and a harrowing enough motivator that can potentially make you do irrational things like reject a regulator, or hold your breath on a panicked ascent to the "easier breathing" air of the surface. . .

Looks like she took the reg out and was breathing the bad air in the pocket, because she was finning to stay on the surface CO2 built up causing the shortness of breath.

 

[34109411]

I have never heard anything remotely like that. It isn't close to true in any of the cases I know.

Lessons For Life: Diver Drowns with Full Tank of Air

Learn what not to do in an underwater emergency in this Lessons For Life: A diver forgets his training with fatal consequences.

www.scubadiving.com

here s one exemple that we could relate too maybe.

 

[SpaceX Aquanaut]

Looks like she took the reg out and was breathing the bad air in the pocket, because she was finning to stay on the surface CO2 built up causing the shortness of breath.

Look at her face as well -purplish or bluish color- she’s going cyanotic/cyanosis. . .

 

[flymolo]

Not resulting Solo Incident caused by Buddy Separation, but panic with hyperventilation:

Scary stress reaction in an experienced cave diver and Scuba instructor, after a wing inflator detachment malfunction and an active physical exertion kicking ascent to surface with double sidemount cylinders, further compounded by surfacing in a potentially low oxygen/high inert gas asphyxiant ambient environment.

Note the classic symptoms of hyperventilation, work-of-breathing, and finally panicked rejection of a working and functional 2nd stage regulator by the victim ("Can't get enough air out of it. . .!"), which is one of the major irrational cognitive signs of a distressed diver in Hypercapnic Alarm Response:


The "air hunger" or "air starvation" instinct is a powerful driver, and a harrowing enough motivator that can potentially make you do irrational things like reject a regulator, or hold your breath on a panicked ascent to the "easier breathing" air of the surface. . .

This was from breathing bad air in a cave

 

[boulderjohn]

Lessons For Life: Diver Drowns with Full Tank of Air

Learn what not to do in an underwater emergency in this Lessons For Life: A diver forgets his training with fatal consequences.

www.scubadiving.com

here s one exemple that we could relate too maybe.

Here is what you wrote:

i read somewhere that most diver separated from the group had usually their tank almost full and the cause was not direct and OOA situation but most likely panic that lead to hyper ventilation or similar.

What does this supposed incident have to do with that?

In addition, are you sure this is a true case? Note that there are no identifiable names or dates. There are scuba sites that regularly present hypothetical cases to make points. Some of them are ridiculous.

 

[boulderjohn]

Not resulting Solo Incident caused by Buddy Separation, but panic with hyperventilation:

Just to be clear, here is what I responded to:

i read somewhere that most diver separated from the group had usually their tank almost full and the cause was not direct and OOA situation but most likely panic that lead to hyper ventilation or similar.

Let's look at the key points of that post:

1. most diver separated from the group had usually their tank almost full
2. cause was not direct and OOA situation but most likely panic that lead to hyper ventilation or similar.

Can you explain how your support for the original shows that most divers who were separated from the group had full tanks and were diagnosed as having died from something like hyperventilation due to panic?

 

[SpaceX Aquanaut]

Just to be clear, here is what I responded to:

Let's look at the key points of that post:

1. most diver separated from the group had usually their tank almost full
2. cause was not direct and OOA situation but most likely panic that lead to hyper ventilation or similar.

Can you explain how your support for the original shows that most divers who were separated from the group had full tanks and were diagnosed as having died from something like hyperventilation due to panic?

All you can say for sure in an unwitnessed diver fatality:
COD: Drowning

 

[34109411]

Here is what you wrote:

What does this supposed incident have to do with that?

In addition, are you sure this is a true case? Note that there are no identifiable names or dates. There are scuba sites that regularly present hypothetical cases to make points. Some of them are ridiculous.

It s just an article among many other talking about the discussion, i tought scuba diving.com was a reputable site,I could not tell you how accurate it is, there so many out there.

Be safe