They had a plan and signals to send down gas to various depths for contingencies like this. Should not be needed, but helpful to accelerate decompression.
Equipment Rebreather incident with narration
- Thread starter Cthippo
- Start date
This Thread Prefix is for incidents caused by equipment failures including personal dive gear, compressors, analyzers, or odd things like a ladder.
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OTF
Coney Island Whitefish Biologist
Great video. Well narrated. Smart guy, but I would have GTFO the loop a bit earlier. I MIGHT keep diving with a slow dil leak, but not a unit that I can feel filling with water.
Around 27:05 he mentions that caustic cocktails aren't a concern with modern sofnolime. I've never heard that. Does anyone know what he's talking about there? I've seen scary (though not life threatening) caustics happen to friends, recently. I've also mixed some up in a glass and it's quite nasty. Was the old stuff worse? Is he just misinformed? Am I?
Around 27:05 he mentions that caustic cocktails aren't a concern with modern sofnolime. I've never heard that. Does anyone know what he's talking about there? I've seen scary (though not life threatening) caustics happen to friends, recently. I've also mixed some up in a glass and it's quite nasty. Was the old stuff worse? Is he just misinformed? Am I?
mr_v
Contributor
Glad the narrator lived, but the perspective is new to me. If the loop is flooded to that level, it is time to bailout.
If you haven't had the pleasure yet, I'll share the lesson for free - caustic cocktail does not tingle like a 9V battery because it is a chemical burn that burns hard AF. If you swallow even a small amount, you'll have a significant emotional event. I had got some on my lips and tongue and could not eat any hot or spicy food for about two weeks.
There are at least two scenarios that could have led to the problem.
The most likely scenario is not doing a proper negative test or a buddy bubble test or both. Negative failures mean water will come in. I am not sure about AP, but I've had scenarios where my unit passed positive but not negative due to a faulty DSV rebuild.
Another scenario is hoses coming loose during the dive. Example: you may pull on the loop too hard during the dive for whatever reason and loosen up a connection just enough to take the water in.
If you haven't had the pleasure yet, I'll share the lesson for free - caustic cocktail does not tingle like a 9V battery because it is a chemical burn that burns hard AF. If you swallow even a small amount, you'll have a significant emotional event. I had got some on my lips and tongue and could not eat any hot or spicy food for about two weeks.
There are at least two scenarios that could have led to the problem.
The most likely scenario is not doing a proper negative test or a buddy bubble test or both. Negative failures mean water will come in. I am not sure about AP, but I've had scenarios where my unit passed positive but not negative due to a faulty DSV rebuild.
Another scenario is hoses coming loose during the dive. Example: you may pull on the loop too hard during the dive for whatever reason and loosen up a connection just enough to take the water in.
newman_diver
Contributor
This is a method used by RB divers with surface support. Colour coded SMBs are used to let the surface know what they need. Reduces the amount of cylinders a diver needs to carry.
On his YouTube channel a commenter asked him about caustic cocktails. This was the diver's reply:
https://www.youtube.com/@D33pUK
A few other people have picked up on this remark which wasn't phrased well at all! What I meant was that most people assume that sea water plus sofnalime produces toxic gas which isn't true. Of course you don't want the liquid to get anywhere near your mouth!
https://www.youtube.com/@D33pUK
A few other people have picked up on this remark which wasn't phrased well at all! What I meant was that most people assume that sea water plus sofnalime produces toxic gas which isn't true. Of course you don't want the liquid to get anywhere near your mouth!
Thanks to the diver for sharing this experience and his learnings from it. It takes some courage to put out a record of you making a mistake. I don’t know many divers who have made no mistakes in their career. Most important is (1) to survive it, (2) learn from it. Sharing with the rest of the community is a gift. Good for our community to learn from it and refrain from criticizing.
telemonster
Contributor
The water will pick up the lime in it and if you roll around it's possible to get it up to the mouthpiece?
Dripping wet lime I would assume would loose scrubbing effectiveness, hypercapnia risk.
Also the water can get on the o2 sensors and render those ineffective.
Bail out.
Dripping wet lime I would assume would loose scrubbing effectiveness, hypercapnia risk.
Also the water can get on the o2 sensors and render those ineffective.
Bail out.
DiveLikeAMuppet
Contributor
If the diver in the video is the person I think it is, then he has a bit of a reputation - for doing fairly big and cool dives (great) but also for a bit of ego and old-school safety approach, at least when not teaching (perhaps not great).
So that can explain why someone might not want to call a dive and instead try to debug the problem.
So that can explain why someone might not want to call a dive and instead try to debug the problem.
Yes, yes, and yes. In addition, the caustic liquid will probably damage the O2 sensors beyond repair as well as any exposed electronics that might be in the head.
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