Why don't we emphasize cesa more??

[fisherdvm]

I am not advocating taking new divers down to 30 feet and having them blow and go--it is a recipe for a fatality. Under a controlled condition starting in the shallow end of the pool should not be a problem but the insurance is not going to cover the instructor I betcha even there.

N

Thanks for bringing the instructor's perspective here. I don't know the legal climate of diving instruction, but I am sure it exists. I often wonder, if NAUI require cesa of 25 meters across the bottom of a pool, aren't they putting themselves at quite a risk? Of course, horizontal cesa at 10 ft depth is much safer than vertical cesa at 25 ft depth, especially if rate of rise is much faster.

As an instructor, would you recommend cesa drill be done from the depth of a 10 ft pool, from across a 25 ft pool at a shallower depth, or from a deeper depth in the OW environment?

 

[PerroneFord]

After discussing about 6 cases of OOA deaths, DAN concluded: ".....emergency procedures, especially those related to OOA situations, are skills we must consistently practice and hone. If we haven't practiced such procedures recently, and these skills are suddentlycalled upon, our mental stress meter can rocket to the red zone"...

Which procedure? I'd like to see divers practice actaully donating GAS to an out of air diver and skip the get the surface as fast as you can garbage.

But you can not change the mentality of a good 70% of certified divers out there - the once or twice a year cruise divers.

Yep, and we'll keep reading about them on the accidents forum.

For these folks, simpler methods should be considered.

Simpler than taking a reg from their buddy? That seems a darn site simpler than trying to swim from 60ft to the surface while not blowing up your lungs!

Eventhough as much as 2/3 of those on the forum would disagree with me, even a 1.7 cu ft spare air can be enough valium to relax a panic diver till he surfaced.

The perception of safety is often more dangerous than the understanding of non-safety. It reduces vigilence.

Of course, there are some 7 ft tall 300 lbs divers who would suck this can in less than 10 breaths, but they can also dive with a 40 ft pony tank with out any hassels.

Or they can get fit. Or they can dive with a solid buddy. Or they can stay out of the water. Lots of choices.

 

[The_DivePirate]

A CESA is not as easy horizontal as it is vertical. The physics of gas expansion doesn't work horizontally, it only expands on the way up.

 

[fisherdvm]

Which procedure? I'd like to see divers practice actaully donating GAS to an out of air diver and skip the get the surface as fast as you can garbage.

Simpler than taking a reg from their buddy? That seems a darn site simpler than trying to swim from 60ft to the surface while not blowing up your lungs!

You are right. DAN did not specify which procedures. I wonder if their attorney told them to delete it.

Ability to get to a buddy is much more difficult in a current. I recalled being in Cozumel, and swimming back to see a rare fish is nearly impossible unless you grip every rock and coral to creep back against the current.

 

[PerroneFord]

A CESA is not as easy horizontal as it is vertical. The physics of gas expansion doesn't work horizontally, it only expands on the way up.

I'll take your word for it. I've never done one, and don't EVER plan on doing one.

 

[H2Andy]

train wreck, thread

thread, train wreck

 

[PerroneFord]

Ability to get to a buddy is much more difficult in a current. I recalled being in Cozumel, and swimming back to see a rare fish is nearly impossible unless you grip every rock and coral to creep back against the current.

So logically, if it is diffcult for you to swim to your buddy, then it is corrospondingly easier for your buddy to swim to YOU. So why doesn't your buddy swim to you when you need air?

 

[The_DivePirate]

Here we go again!!!!!

 

[fisherdvm]

So logically, if it is diffcult for you to swim to your buddy, then it is corrospondingly easier for your buddy to swim to YOU. So why doesn't your buddy swim to you when you need air?

You have got a point. Unless your buddy is a photographer, and waiting for that fish to pop out.

You are right, the thread is dead.

 

[fisherdvm]

Thanks for all those who answered my question. I learn more here everyday.