CCR Bail Out

[leeiom]

Just wondering how many have had to do a emergency bailout ?

I had my first and hopefully last on Monday.

what happened -

Shore Dive in morning - perfectly fine got some lunch went to boat looking forward to dive ALL GOOD

Boat - Did prechecks on CCR before i got on the boat even though loop wasn't broken at any point as unit went straight in car.

untied unit on boat when i was getting ready to dive BANG unit on floor of bench ( I have never dropped kit of bench on boat ) redid all checks passed positive and neg for 3 mins each only damage was a cave shield.

Got in water dropped to 7/8ish me and my buddy did bubble checks all fine, down to 35m with current all good loving the Dive, decided to head back to rock line and start working our way up slowly as planned had to swim though a bit of current but nothing ive not done at that site loads of times.

swimming back breathing went tight, and adv dint fire.... hmm checked adv by pressing it in it worked phew i can breath that didn't last long, thought maybe canister light wire caught the CL Dump, no!! PP02 1.3 was stable and i had 140ish bar in both dill and oxy, there was no gargling,funny taste, i just couldn't get gas through......

i let my buddy know and bailed at 35m

Went onto my bailout a ali40 with 180bar of nx30. at this point i was breathing pretty rapid ( tried to stay calm ) switched handset to low sp, (should of went to oc bailout ) i went to do my DSMB my buddy already had his up by this point took mine out of my hand and clipped it on to himself, started coming up, burping loop when needed. hr/ breathing went straight down by the time i got to 20m stayed there for a moment and composed myself, check checked comp and changed it to OC B/O no deco as this luckily happened early on in the dive made way to surface and got back on boat.

what caused the problem ?

did i flood the unit letting water in around my mouth - disconnected hose was dry which is amazing for me as i had to burp it on the way up so 10 points for not over burping and getting water in

there was no blown oring otherwise we would of spotted bubbles on check ....

took the head out water in the bottom of the unit just covering the bottom of the sorb !!! UNIT FLOODED - that will be the not been able to breath !

did another positive check well waiting for other divers to surface after about 10/12 mins the lungs started collapsing

PINHOLE HOLE in lungs, probably caused from drop but as i only tested for a few mins i didn't notice....


THINGS I HAVE LEARNT FROM THIS DIVE:

I can bail out in anger.
I should of got on the bailout quicker and then tried to find problem not the other way around although checking did only take a few seconds.
from now on Im running a pressure test from when I get on the Boat until i am about to get in the water

so ccr is in shop been sorted, ill be doing a couple of shallow dives just to make sure its fine, then back on the boat.

it has shook me up, scared me but ill be back on it ASAP and a lot more aware of things, i guess and more confident in some ways as i know i can BO in situation

[Paulo]

I wonder if the fall knocked the base of the scrubber can enough to allow water in under there. It can look like a solid piece but the JJ can is a tube with an end cap and o-rings.

Thanks for posting. Shit happens. It seems like you learned from it.

[notdeadyet]

Always better to bail out and worry about the right and wrong of it later. I don't know the architecture of the JJ so can't offer any other advice.

Just wondering how many have had to do a emergency bailout ?

Depends on how you define "emergency". I've bailed out by choice a few times because I'm lazy. I've had something fail that isn't massively challenging, like something electronic, and spunking a 3 of air to get to 6m was just less hassle than doing one of a range of choices to stay on the loop. Nobody is scoring my performance so a quick bailout and ascent was straightforward but maybe not necessary.

I've had a few "real" bailouts. Two CO2 hits on a KISS, both from floods. A retained CO2 hit from trying out a new mouthpiece on my Mk15, fine on the surface but at about 15m it was like having my lungs hoovered out. The scariest was a non-dive, dicking about in ankle deep water trying to put my fins on. I felt the walls closing in, spat the DSV and just breathed normally. I got so task fixated on doing my fins I never noticed the loop going hypoxic. I don't know if that counts as a bail-out as I'd never really bailed-in.

[Paulo]

I got so task fixated on doing my fins I never noticed the loop going hypoxic. I don't know if that counts as a bail-out as I'd never really bailed-in.

interesting

[notdeadyet]

interesting

mCCR on a shore dive at Dorothea, just standing in the water trying to put my fins on. I had a shut-off on the oxygen so that I could keep the hoses pressurised but not be pissing gas into the loop while getting kitted up at the surface. I always ran a pure O2 loop at the surface but I'm guessing in this case the dil would still have been switched on. Burned through O2, loop volume dropped, eventually it's going to get replaced with dil and that's going to get breathed down. I was breathing hard, a combo of effort, anger and it being a boiling hot day. I can't recall the ppO2 but it was somewhere in the region of 0.10-0.12'ish when I looked at it if I remember right (I've not dived mCCR in about 12 years). I don't remember much other than the feeling of the curtains coming down, for whatever reason I had the good sense to spit the mouthpiece out and the lights came on again almost instantly.

It scared me more than anything that's ever happened to me on a rebreather. I knew if I'd have passed out I probably wouldn't even have raised a second look from anyone. I'd have been face down in a foot water, would've looked like I was just doing some predive checks. It also happened so easily, just a momentary lapse and then getting distracted by a stupid task. Drowned in knee deep water.

[Woz]

When doing a neg check, I find the "suck in the loop then turn the mouthpiece off" to be pretty woeful.
The trick is to stick the loop in your mouth, suck it flat, and close off the back of your throat so you can still breathe through your nose but with your mouth shut off. Then if there is a teeny tiny 1cc leak into the loop, you can tell as your cheeks will expand. It's a really sensitive way of doing a neg test, and you can do it much quicker than the "suck it and see" method.

[gobfish1]

What was the problems with the adv.
Also seem odd to have small pin hole in lung but have lots of water in
scrubber. (No gargling)

Had slow leaking from a hose I'd not dune up properly. On my AP unit

Toke about 15mins to notice and I managed to stay on the loop for a nother 40 mins and Finnish the dive . Keeping a eye on wob.
Counter lung was in 1/3 full and scrubber had a few hundred mil in bottom just about touching lime. But most of the water got caught in the counter lung. ( gargling often )

JJ has water traps yes?

[witchieblackcat]

I agree with Gobber's analysis re: tiny pinprick does not equal massive flood.

Are you sure that burping the unit didn't fill the scrubber with water?
Not sure about JJ but on my unit you can happily breath with a fair amount of water in the bottom of the scrubber canister albeit there's a lot of bubble sounds.

[ebt]

I think i only had two in over 10 years of ccr.

I've had a few "real" bailouts.

Oh how quickly the McMeg is forgotten….

[notdeadyet]

Oh how quickly the McMeg is forgotten….

I was thinking about that earlier

That was more of a fight with a xenomorph attempting to pin me to a cave roof whilst suffocating me at the same time. Fucking thing wouldn't stop, even when I'd taken it off it was still coming at me for more. I thought it was trying to John Hurt me.