Pros And Cons Of A Rebreather

rebreathers are often seen as a dark and scary side of scuba diving but they're starting to creep their way into the recreational side and you can even do your patty open water on a rebreather if you like so normal scuba where you blow bubbles is called open circuit or OC for short because every time you breathe out you lose a lung full of gas rebreathers recirculate that gas and turn it back into fresh air so they are much more efficient at gas management your exhaled gas gets passed through a scrubber to remove the carbon dioxide and senses then analyze it and Oh to contents just to top it back up by this method you can breathe the same lung full of gas over and over again until either the scrubber is saturated or you run out of pure oxygen to top it up so if you're in the market for a rebreather or if you've never even heard of one before let's take a look at some of the pros and cons of a rebreather now I'm gonna mix them up a little bit so it's not all pros and then we're just gonna end with cons because you know it's just fair isn't it [Music] with open-circuit you analyze your gas when you very first jump in and that is the gas that you'll be breathing for the next hour or so as you descend and ascends the partial pressure of that gas will change limiting your depth and changing your rate of absorption as you breathe the loop of gas on a rebreather it continually analyzes it with every single breath and it either manually or automatically adjust the mix so it's optimal this way your NDL just explodes and you can stay down much much longer one manufacturer has a really nice example and they put it like this if you made an hour-long dive to 30 meters you'd need 74 minutes of dqo on open circuit on a rebreather you'd need just 11 a decent unit will set you back a few dollars and each unit has its own training course so the capital cost can be high but in the long run if you switch wholeheartedly to rebreathers they do work out cheaper to run if you die frequently you always need to dive with a redundant open circuit gas supply as well on a rebreather so there's another cost in all the stations is that you're gonna need so it does start to add up and you still get the maintenance and service costs of first stages and the cylinders and the rest of your equipment when you switch to a CCR or even an SCR you'll notice just how noisy open circuit diving is the stereotypical Darth Vader noise of a second stage cut through water and both you and the Wildlife notice it on a rebreather you'll notice just how little fish react to you when you cruise past because you don't disturb the water and make so much noise they may feel the need to leave they just sit there and do their thing on a rebreather I have to literally shoo away fish from an area because they just don't care that you're there you're not making any noise and you're not blowing bubbles they just see you as a big version of their open circuit teaches you some really bad habits for rebreathers the most important thing is that you can't just take out your mouthpiece even when you're on the surface because the loop isn't pressurized you need to remember to switch the mouthpiece so the loop doesn't flood you can't just throw your unit together and jump in like open circuit neither you have to assemble and check all the parts on a rebreather and check the valves and run a pre breathe as well just to make sure that everything is working and you don't have any tiny leaks even once you've hit the water you and your buddy have to run bubble checks to make sure that you're not leaking gas from any part of the loop every breath from a cylinder will be dry and about as warm as the surrounding water you inhale this and then your body warms this up and makes it a little bit humid and then you just blow that all away on open-circuit you're just wasting it on a rebreather you exhale this nice warm humid gas and it recirculates back to you so you're breathing in air that's nice and warm and humid this is particularly nice on a cold day you will find that you can stay down paint a lot longer because you're not breathing cold dry gas so you don't get that dry mouth neither it feels weird at first because it isn't pressurized but once you get used to it you will love it because your displacement weight changes with every single breath on open circuit your buoyancy changes as well it's one of the first things that you learn to fine-tune your buoyancy rebreathers have counterlungs that you exhale into and breathe from so the volume of gas doesn't change that much because of this you can inhale and exhale as much as you like and your buoyant seal won't change at all granted yes open circuit regulators have a few moving parts as well but rebreathers have quite a few parts that you need to check and maintain before every single dive with open circuit you have one resource that is used throughout the dive your gas on a rebreather you have Adelia once you have oxygen and a scrubber as well so there are a few more resources that need to be checked and topped up before every dive open-circuit is pretty bulletproof you can do whatever you like within reason and your regulator will just give you gas when you ask for it rebreathers work best when you are in the perfect trim position you can't really look up or down on a rebreather you really have to stay pretty flat because if you pivot upwards all the gas Rash's up to the highest point of the loop your mouth so you balloon up and the opposite happens when your head down swimming down into something all the gas that rushes down into the counter lungs so you kind of have to coax it so that you can actually inhale it okay so we're gonna end with a fairly ambiguous pro and con merged into one you look pretty badass with one of these straps onto your back which is definitely a pro the con is having to explain the unit and how it works to everyone at the dive site because you draw such a crowd wherever you go with a rebreather and that does take up your valuable dive time so you do have to put that into consideration when buying a unit anyway what do you think about rebreathers have you ever tried one do you own a unit if so which one there are a whole bunch out there so what made you choose that particular one I mean that in itself is another three or even four part video on deciding which rebreather to go for because there are just so many out there and they all have their little features but let's discuss breathing the same lung full of gas over and over again in the comments if you enjoyed this video then no no don't don't let me stop you pressing that that like button or that subscribe button to that that's the little red one there and that little bell icon he looks a little bit lonely by himself in the corner anyway thanks for watching guys and safe diving we are an online dive store serving the UK and the world for all your diving equipment needs so why not visit us at simply 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Channel: Simply Scuba

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Keywords: simplyscuba, simply scuba, Simply, Scuba, #simplyscuba, scuba diving, scuba, diving, #scubadiving, the simply group, Pros, And, Cons, Of A, Rebreather, Pros And Cons Of A Rebreather, should you buy a rebreather, are rebreathers any good?, why are rebrethers so expensive, are rebreathers easy to use?, Mark Newman, list, list video, top 5, top 10, scuba diving (interest), scuba diving - topic

Id: J3W_4__vgAo

Length: 8min 15sec (495 seconds)

Published: Fri Jun 21 2019