Don't Breath From A BC - Scuba Tech Tips: S13E02
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- เผยแพร่เมื่อ 5 ม.ค. 2022
- Just because a BC it inflates, does not mean it is safe to breath from. Alec explains the history and reasons why divers should not breath from their Buoyancy Compensator (BC).
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The whole point is that is an option in the absolute emergency. If something's wrong with your air supply, you dont have a pony bottle and your buddy is blissfully ignorant to your attempts to attract their attention, Id take a risk of inhaling some crap from the bladder to give me an extra gulp of air to surface as opposed to drowning. Not that I'd like to do it...
Well if BCD air is your last option, use it but think about how many prior decisions failed: air management, OOA with buddy, CESA, redundant supply all come to mind before breath from the BC.
As a biologist. I would fear that the moisture in the BCD may breed mold and or bacteria. I would not like to breathe in a slug of moldy air.
Absolutely true. No more that I would lick a toilet bowel, oh wait, there are people that do that! Thanks for watching.
I was taught (back in ‘73) always keep your regulator in your mouth as you do an emergency controlled out of air ascent. As ambient water pressure decreases it will allow the first stage valve to open and supply you with the residual air still remaining in your tank. This can be a couple of breaths or more.
On one occasion I confirmed the truth of this procedure.
Glad you got out of that situation and hopefully learned never to do a CESA ascent again. Thanks for watching Terran.
There's always some moisture in the BCD. Moisture + darkness + warm temperature in summer makes a perfect environment for germs, bacteria and other bad things. Think of that next time you come up with an idea of inhaling the air from your BCD.
Very true my friend.
Another really good vid Alec !! Thanks and wishing you happy new year !!
Thanks, you too Joel.
You read in my mind !!!!
I just finished the restoration of an US diver aqualung collar style BCD.
As you can imagine, all the fittings to the bladder were rotten but the bladder itself is still in good condition
Happily, I've found machanical flanges that can be installed securely to that bladder and of course, i reattached all the functions except the Co2 infllator. I installed a pop off valve instead but I can easily modify the setup to include the Co2 inflator.
It is a time capsule !!!
Happy New Year
Thats a nice project you did Jacques. Did you know i can read minds, well everyone but Kevin as he is crazy.
One of my instructors had one of the safe second BCD supply tubing. It was a pain to switch too for orally inflating their BCD for the rescue exercise without accidentally pushing the button but at least now I know about them.
Also, orally inflating you BCD is part of the shared air skill. The first time I took it the instructor did not say I can use my fins while doing so, it made a hard chore easy once I could fin to stay above the water. I think it took three deep breath, which is easy to do when you are above the waves since you can fin, and it was full.
To learn more about BCD mounted Safe seconds, watch S04E12 on this subject. It will give you something to think about when buying your own gear.
Ha ha, I remember these. We called them "toilet seats" in Germany, because of their shape.
That's a good name but a Mae West is BIGGER!.
I started diving in the late 60's, got certified at Laguna Seasports in four consecutive Saturdays for $20 & got a top-of-the-line Scubapro Mae West bc in the early 70's. Seeing as how I never cleaned or rinsed that thing out in the first 5 years I had it, I would never think of breathing outta that nasty air cell.🦈
Oh wow! Thanks for the story.
A.
Wow VINTAGE SCUBA! I've been waiting for so long. Very interesting to know more about older bcd's. I've never seen one with mouthpiece, but I am pretty sure I wouldn't breathe from one. I wouldn't breathe from drysuit either haha
Glad you enjoyed it!
I agree a BCD bladder is not a replacement for safe second and the likes. However, in the unlikely scenario of no air and no buddy, if you have no other option but an emergency ascent, during which you will let out air anyway to control your ascent rate... You could consider a breath or two if it helps you maintain consciousness for the 1-2 minute ascent to the surface.
It's very risky as it is not a skill taught like OOA ascent and CESA. Get it wrong and suck water could be fatal, however, leave it up to each diver.
A
@@AlecPeirceScuba_SeaHunterbut dont u get the point that u have no air? And if theres air pn u what wud he the reason not to breathe it? Rather die?
Hello Alec, your Sea Quest must be an older version to mine, I swear they were made from the same material, colour and all. Mine is a U shape that could be inflated by mouth or low pressure hose from the tank very similar to modern backplate and wing, but the backplate is hollow molded plastic. Thanks for the video informative as always.
There were a few versions of the Sea Quest from CO2, oldest to pony bottles. Still a fun rig for vintage diving if the bladder is intact.
Heelo Alec, I was wondering as you mentioned the changes in diving over the years what changes today do you consider bad or anthing from the past be it equipment, procedures or training that you prefer over their modern equivilants. Love the videos, keep them coming!
Good question Bradley. My one big grip is 1st stages with hollow dust caps holding a tablespoon of water. There are better options like the ball that has no water cup inside it. It's a really simple, easy to replace item many makers don't adopt. Instead its a dust cap you can do shots from. Help divers don't add to service bills.
Interesting Thanks! If I had some air in the BCD that was from the LPI. If that was all I had while trying to get to the surface and I was desperate. I would take a gulp.
There is a danger of a fast inhale from a BC during an emergency ascent , e.g. going up really fast, you risk a lung injury. As this is not a skill trained and practices, stick with CESA or a buddy ascent.
Another great tech tip.
Glad you liked it!
One of my first BCDs was a horse collar, not the most comfortable thing but it did the job.
As they were the only option around, they did a good job. Lots of my vintage diving friends still use a Fenzy or similar when diving. We are not crazy, just experienced because we did things right.
Dear Alec, thank you for your videos.. I do have a topic suggestion for you. Since you been diving since you was 12, you most likely have experience the feeling of getting older 😉 With that in mind and you look good for your age btw, you also must have experienced pains, aces and symptoms related to work, environment and again the aging process. Now the love for scuba makes you overcome many things, but it must have been hard sometimes to do scuba classes even though you perhaps did not want to or was acing, sore or tired. I sadly stareded late only 6 years ago at the age of 42, got my Dive Master certificate last year. But now starting to feel the age, sadly at 48 which is a young age I know 😉. I get mostly lower back pains, shoulder and neck pains after a long dive way within limits, due to i.e. equipment weights, courses etc. So, a good idea for a topic could be just this, challenges of scuba, the side they don't tell you about.. Ear infections, backpains, neckpains, headaces, degrade of sight, challenges of diving at higher age etc. How about DCS, is it easier to get the older you become? Anyway, you get the idea.. Not all are young and healthy, not all are bendy and streamlined.. Happy new year to you and Kevin by the way, cheers guys ;)
This is a good idea Tom. I accepted all my 'issues' but there are likely lots of divers with the same problems. I added it to my ideas list and will have to research some to prepare for when Kevin and I do our next shooting day. Much appreciate the feedback and be safe my friend.
very interesting !
I think so too! Thanks for watching PD.
Alex, has great info, videos are great. Wonder if he could take out Loyd bridges in underwater knife fight?
I could never hurt my hero Mike Nelson!
A
Still using my UK made AP Valves (now AP Diving) BCD with a regulator style mouth piece and a small air cylinder in a pocket at the back to inflate the jacket so you can (thoeretically) put air into it and breath from it in emergency.
Never done it in anger, and gave up on the small tank years ago.
I am amazed as how some vintage gear is just as good today as when made, while others never lasted a year.
A
Dear Alec, I think you forget an important reason not to breathe from the vest:
can you imagine the microbial fauna that can grow in the permanently humid and unrenewed (washed) environment of the inside of the bladder? And then does all that go to our lungs? Nice way to get a lung infection.
(Although better than drowning, right?)
Greetings from Spain (from another veteran who likes your videos).
Hello Vitriolo from snowing Canada. Oh there is yucky stuff in all BC bladders but can be reduced by regular cleaning. If you used all other proper diving options and are down to breathing from a BC, oh well, do it.
In a Emergency Accent take a breath out of your BCD is a good idea!! As you ascend you may get a couple of breaths out of your tank but if not there is no reason why you can’t take breaths from your BCD there is no carbon dioxide in your BC all air is from your tank it’s being years since I’ve seen anyone blow up a BC under water or on the surface, thus I think it’s a great idea to try to catch a few breaths from your BCD especially if your trying to maintain a safe accent rate
A big danger of inhaling from a BC during an emergency ascent , meaning going up fast, you risk a lung injury from inhaling and a fast ascent. I have seen several times over the years divers with stuck BC valves (sand inside mostly), that only inflate, are disconnected and end the dive by slowly vented the BC during ascent and actually orally inflated on the surface. Not even instructors just smart divers.
I had one of those, I still use a Sea Elite horse collar.
If the bladder is intact they are fun to dive. They can also scare new divers if you tell them this the newest model BCD made!
A.
As far as I know, yeah you could use your BC, but it should be just in case of emergency and as far as I remember the idea is just to take one or two breath, but to be honest if there is such a dangerous emergency I would prefer to breath in and I would just breath out slowly until I reach the surface.
If there is such a emergency you would have to breath from your BC, much must have went wrong before.
Many divers forget their training on: out of air with a buddy and CESA. These are taught and practiced skills, not BC breathing. Thanks for watching Ben.
Bought that same sea quest vest about 35 years ago. Sat in basement for 25 years. Pulled CO2 cartridge to check it out. Internal bladder burst. Never understood why they eliminated the CO2 cartridge other than keeping divers from creating uncontrolled ascent.
Back then, the CO2 BC was for surface use only, not during the dive as it would create an uncontrolled ascent. Nice to know another Sea Quest owner.
Alec,
Please show a bladder (a few years old) from the insides…
What is the black slimy film in the badder-?
Is this a primary reason not to use a BCD-? To avoid a long term lung 🫁 issue from infection-?
Good points but I don't have spare BC to show bladders. As for the slime, just like slime on bathroom walls, water+bacteria+yuky stuff. It's short term problems like lung infection or breathing problems. Never a good idea my friend.
Alec, don't take it wrong but you might even be classed as the 'oldest' diver. :-) Seriously though, this is a great presentation. Your explanations are informative as well as entertaining. Thumbs up my friend.
Ha that's good 'oldest diver'. I may use that Rick along with 'stone age' diver. Take my friend.
You missed the main (modern) point of not breathing from a BCD - high chance of lung infection.
Unless you regularly disinfect your BCD, the insides will quite possibly be quite rank. Partially due to seawater ingress from the dives themselves but also what do you do after rinsing it with fresh water after your dive? That's right, orally inflate it so it dries better, which adds all the lovely microorganisms from your breath into it.
That said, if it was a case of drowning or making it to the surface, heck yes I would try to get a gulp or two of air out of my BCD.
I rinse my BCD after every week it is in use, there is an adapter that connects a hose up to the inflator valve to flush it with water.
@@toriless Not good enough. Speaking as a CCR diver. Needs to be properly disinfected. Sure risk is much lower with a bcd, but won't catch me breathing from it except in an absolute emergency.
Yes lung infection is a risk, but that is long term. The immediate concern is BC breathing is NOT a skill learned and practiced by any training agency. Think of the risk of a lung over expansion injury when inhaling fast from a BCD during a rapid ascent. Stick with the learned CESA skills please my friend. Also venting a BC for controlled ascent is also not something divers have trained on.
@@AlecPeirceScuba_SeaHunter Thank you @Alec, and yes, of course, those are additional very important safety points that you raise and, perhaps, should have been highlighted in your video as well.
As for venting BC during controlled ascent, that is definitely something we train our divers on! Emphasis is on "controlled" - can't do that with a full BCD!!
Fascinating glimpse of diving archaeology; I mean the front-mount BC, not you Alec, obviously! I can see that in extremis, if you are in an emergency ascent and you've no more air, there will be gas in your expanding BC that needs to be released. Releasing some into your lungs first would be a good idea, then dribbling it out as normal. But it's truly a last resort for when all the usual mitigations for running out of air (planning, margins, monitoring, redundant equipment, buddies etc) have all failed.
Hi Tim. Lots of comments on this as you can read. My point is stick to skills you learned and practices: e.g. CESA or a buddy ascent. The risk if a lung injury from a fast inhale during a fast ascent are very risky. Stay safe my friend.
@@AlecPeirceScuba_SeaHunter Agreed, this is not a skill people will ever practice, and controlling rate of ascent will be even more difficult. Truly a last resort!
Given you breathe out 17% oxygen or so (the reason why rescue breaths during cpr are effective) wouldn't the orally inflated air in the bc still be ok to breathe? I understand the condition of the gas there isn't optimal for breathing but I'd assume in an out of air scenario when you're doing an emergency acsent why not take a breath from the bc? You need to deflate it anyway when ascending, what are the downsides if the alternative is no air (out of air scenario here).
There is a reason why open water divers are taught 3 accepted ascents, normal, share air and CESA. Teaching a one off idea, BC breathing, is risky in an emergency situation. The fix is simple, watch and manage your air always.
A
Greetings Alec, My internet reception is really bad. Did you receive my narrative on Doublette, or other e-mails?
SGB
Don't think so Scott. Send it to aleccpeirce@gmail.com please.
A
Could you please review Spiro CG45 (if you have one)
I don't have that model but check my Vintage Scuba playlist for many cool and unique early double hose regs.
A.
I don't get the part where you'd be breathing in just CO2 from your BCD. In modern BCDs the air inside of it comes from your cylinder containing normal air right?
If you're breathing from your BCD it would only be because your tank is empty. If you're exhaling into the BCD, you'd be filling it with CO2 and using up the O2. You couldn't do that for very long before the O2 would be depleted and the CO2 concentration at hazardous levels.
@@seikibrian8641 yes, that makes sense. Thank you.
Breathing CO2, which is not oxygen, will cause blackout. Not a good thing when diving.
Did you wear one of these in “Sea Hunt”?
I have worn this style for vintage diving days but this particular model was long after Sea Hunt ended. If anyone wore a BC it was a WW2 aviation style. More of my Sea Hunt Remembered will be coming this year.
….best choice is dive with a buddy with octopus. You have one too. Safety counts. After accidental OOA incident,I realized you DO have at least 3 good breaths on the way up from 40 feet. My recccomendation. Don’t depend on ‘J ‘ valve that can accidentally deploy and use a regulator with gauge so you can see how much air you have. No more State Owned gear for me on a project. Have an octopus to and gauge to be safe. Voice from experience.
Add constant air monitoring prevents OOA situations. Thanks for the feedback Scott.
A
You would probably get a nasty chest infecting from breathing out of a BC, Cesa is a much better option depending on depth
Agreed, that is why they teach it and you practice it in Open Water. Still some divers push on to the last breath in a tank.
Plus you'll also get water in your mouth first.
That's a bad thing, you're right.
Remember these and still have a couple of those CO2 tubes hanging around.
You should have seen how many I went through to get a descent POP when pulled. Those are expensive canisters too.
If you are breathing from your BCD then things are bad and you are going to discover how bad in a few breathes when the air gets bad and you have to breathe more to get the same amount of O2. Secondary concerns of it being CO2 and filled full of microbes and what not are secondary to the fact that you've run out of air.
Oh yes, not good for your long term health but then if you messed up all valid methods of surfacing, may be your last option.
Still use horse collar BC's in military dive schools to this day. I dove with one for several years in the early 2000's. LOL! Anyway... NEVER breath from a BC. You NEVER know what could be inside. Mold, bacteria, and other contaminants could be inside. Further, you'd be taking out the gas needed for buoyancy.
Right on PDC.
A.