Eagles Nest Cave Diver Death

[Jax]

Okay, I Googl-ed it. Got a lot of sales of CCR's and training sites. So why is it "fascinating" and "not for you?"

The capabilities and features and what CCR allows divers to do is fascinating . . .

. . . but not for me! Lots and lots of risk, and the consequences of even a minor mistake are incredible. Me - rec and proud of it! I'll just admire the rest of you. :worship:

 

[lamont]

Which then brings up the question "could a rebreather diver get away with diving a very hot diluent as long as he never had to bail out?"

well, as long as you never did a dil flush...

and this has been discussed on rebreatherworld before, with a set of divers (generally in the minority) arguing that hypoxia was the real silent killer with rebreathers and that hypoxic dil was a bad idea and hot mixes and breathing down the O2 were better...

i don't recall the thread, though, and 5 minutes of trying to search for it didn't come up with it...

 

[nhdiving91]

The men were inexperienced divers and had no certification, said Sgt. Donna Black of the Hernando County Sheriff's Office.

Is this true or more reporter BS?

That's BS they both had over 100 dives on the rebreathers and Greg has several thousand dives all over the world. They are also instructors for several agencys.

 

[Kevin Carlisle]

That's BS they both had over 100 dives on the rebreathers and Greg has several thousand dives all over the world. They are also instructors for several agencys.

If they were not cave certified then in that environment they were very inexperienced. Thus the outcome you see now. The cave does not care if you are an instructor or not. OW has nothing to do with cave diving.

 

[nhdiving91]

Jimmy it's hard to beleive your gone. I know we well dive again in paradise.
Love ya Brother

 

[Rick Murchison]

You are right, except the nitrogen would also be raised in relation to the oxygen so depending on whether you use PPN2 or straight PHe to calculate END the metabolized O2 either will or won't affect the END. Comes down to the old O2 narcotic debate which I believe has been discussed elsewhere

I figure END based on O2+N2 so only the He% matters...
Rick

 

[Rick Murchison]

well, as long as you never did a dil flush...

I'm sure there's a hot debate on the subject, but from the outside looking in it would seem to me to be prudent to run a diluent that you can breathe safely on the bottom for some time...
Rick

 

[jkaterenchuk]

I'm sure there's a hot debate on the subject, but from the outside looking in it would seem to me to be prudent to run a diluent that you can breathe safely on the bottom for some time...
Rick

Actually it prudent to run a DIL that is lower in PO2 so that if you need to bring the loop PO2 down quickly you can by doing a DIL flush. There are situations in which this might be needed....unexpected O2 injection into the loop and dropping to a greater depth quickly.

Running a rich bailout PO2 is often used when an immediate ascent can be done...which of course is not possible in a cave.

I think what Lamont was referring to in his earlier post is some divers (usually cave) advocating running a DIL that would have an equivalent PO2 as you would utilize if on OC in the situation in which you have a hard bottom. And the other camp that support not using a hypoxic DIL on a dive in which it is not required. Such as someone using 10/50 for a 100ft dive because it is what is left in the tank.

John

 

[Rick Murchison]

Actually it prudent to run a DIL that is lower in PO2 so that if you need to bring the loop PO2 down quickly you can by doing a DIL flush.

We're saying the same thing here...

Rick

 

[Rick Inman]

And the other camp that support not using a hypoxic DIL on a dive in which it is not required. Such as someone using 10/50 for a 1000ft dive because it is what is left in the tank.

Actually, that would be a hyperoxic mix.