When Can I Start Diving a Rebreather?
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- Опубликовано: 9 фев 2025
- When Can I Start Diving a Rebreather? #askmark
#scuba #scubadiving #scubadiver
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I believe if the cost of going CCR and training wasn't 5 times the cost of standard OC we'd see a heck of a lot more people running CCR
Hello Mark,
I love my APD Inspiration which I was diving since 3 years, a great unit 😊 it works safe like a tractor
There’s the GO rebreather out now, seems to be the closest to a “recreational” rebreather there is. Looks like it anyway.
When I started diving with CCR divers, they seemed to spend the whole trip out to a site fiddling with their rig and then half of them wouldn't dive because they had alarms. I very rarely see issues these days and the actual (directly) pre-dive setup seems quite quick, if not quite as easy as OC. I've done a couple of try-out dives on CCRs and, initially, found it quite hard to breathe hard enough to drive the system (possibly a 'habit' from OC diving), but I didn't find buoyancy too difficult and it was fairly easy to adapt - The trick is in learning out how to deal with issues, I believe.
Think about the logistics though. On vacation, getting sofnolime, renting a small O2 cylinder and getting it filled with pure O2 may be a lot harder than renting a few alu 80 cylinders.. So you may need to travel to tec-oriented dive centers.
I'm glad rebreathers are getting more accepted, but there are pros and cons. They provide longer dive times and more ways to solve problems, but also increase complexity. Statistically, CCR diving is still quite a bit more lethal than open circuit. If you don't dive it every month at least or you're not disciplined enough to use a checklist each time I'd stay away.
Military teaches people from zero to diving a rebreather in 6 weeks and first few weeks of that aren't even diving
#ASKMARK hello thank you for the valuable content and informations, what do you think about Fourth Element the seeker mask? I didn’t find any review from your side on the particular mask. I dive using Atomic subframe but i’m planning to get the seeker contrast for lake diving can you please make a review, many thanks!
I love the Seeker Mask. I've never had one long enough to make a video about it but, it is a good-quality mask with a great FOV.
I love my rd1 I got it after taking my rescue course most rebreathers require you to take rescue and at least nitrox
#askmark Hello Mark. I would like to know your opinion on this one. For a recreational driver, is it better to dive with the lowest conservative setting to get the longest possible dive or increase the conservative setting and possibly get a small deco time on your way back with a longer safety stop but following your dive computer?
It's better to err on the side of conservative until you're more experienced. Dive computers aren't perfect and even though the computer says that everything is fine, what's going on in your body may be different...
The other (potentially more) important thing to consider that Mark didn't cover in his reply is what are you qualified to dive? If you end up with a deco obligation on your DC, but your certification level doesn't cover decompression diving (or more accurately diving beyond No Decompression Limits - as all dives are decompression dives), you could risk invalidating your insurance IF there is an issue. This isn't just travel insurance I'm referring to, but also your life insurance in a worst case scenario.
If I'm just going for some fun, uncomplicated, recreational dives, following the DC for NDL obligation (rather than a "rigid" table planned dive), then I change the level of conservatism that my DC is set at based on how I'm feeling, and what the dive conditions are like on a day.
When setting it I always ask myself, Am I well rested? Am I well (but not over) hydrated? Am I well fed (links to physical fatigue)? Is there high current expected? And a final one before I jump in the water, has the boat ride made me nauseous at all? If the answers to those things are even slightly negative, then I raise the conservatism level set on my DC and stay within the NDL limits for the given dive. Once in the water I'll also pay attention to how much effort I'm actually putting in, as if I'm putting in more effort than expected, that may make me stay further from the NDL limit.
Remember, a DC doesn't get bent and knows nothing about your personal conditions... (Although Garmin look to be working their way towards changing that...)
Now, that said, its totally different scenario if I go on a planned decompression dive using mixed gas, as I plan the dive and dive the plan. Although I may shorten the bottom time (vs what was planned) in this instance if I've experienced any of the above negatives, but still keep to the original decompression schedule.
Really interesting had no.idea you could do that. We have some old Jacgues Coustoe type ones from the 50's..guess they are rebreathers as the hoses are larger?
"guess they are rebreathers as the hoses are larger?"
What??
This sounds like you're talking about the old twin-hose OC kit, rather than a rebreather. I have considered going down the CCR route, but I can't currently justify the cost against the type of diving I do. Maybe once I have more free time I'll look again.
They're talking about the old regs with thick twin hoses going to a regulator behind your head.
No, they're open circuit (no rebreathers) but they do have a 'loop'. The second stage regulator is on the valve behind your head instead of in your mouth, so you breathe in through a wide hose and out through another wide hose. The exhaled air bubbles emerge behind your head. Look up Alec Pierce's channel about vintage twin hose regulators.
#askmark Hello Mark, newer diver and just got my EAN Cert. Any advice on good gas analyzers that don't need an air cylinder for calibration?
The Analox O2EII Pro is a very popular analyser. The new Divesoft DNA looks good also.
Most divers just calibrate to the air around them at 20.9% or just round it up to 21%
Hows the work of breathing on a rebreather? I would expect higher than open circuit where the system is “more pressurized”?
Yes, it's a bit higher. Depends a lot on the model and on where it's worn. For example a chest mount will generally have easy inhalation and a harder exhalation since you're pushing the air down into higher pressure. Backmount is the opposite and sidemount somewhere in between. Then there's differences between models. For example the Sidewinder 2 will have a better WOB than the 1 due to a redesigned airflow.
@@Yggdrasil42 Thanks. Makes sense.
It changes unit to unit some breath better than others I love my rd1 especially for the price
@@Yggdrasil42 and it depends on your trim underwater. If you are with your head down at the lowest point, it's harder to breath in; if you are in an upright position it's harder to breath out and so on. 🙃
Yes, that was my experience when I did a try-dive on a rebreather - I wasn't breathing hard enough initially to drive air around the system.
#askmark Hello Mark, i am about to buy my first dry suit. And there is not a lot of information about possible dry gloves/cuff Systems. And even less as a comparison. Can you please explain? Thank you a lot in advance 😊
Sure, there are so many different 'styles' of dry gloves and attachments that it's tricky to summarise.
Most dry glove systems consist of two or three rings; one glued to the sleeve of the suit, one that holds the cuff seal in place and proves a mounting point for the final ring that holds the dry glove.
There are three attachment 'types' for dry gloves:
1. *Fitted*. The manufacturer will fit a ring to each sleeve on a new suit. This is a mounting point for a cuff seal and a dry glove ring.
2. *Replacement*. You replace an existing cuff system with a compatible dry-glove system. The suit will have a mounting ring fitted to the sleeve that a 2nd ring will fit into and hold the cuff seal in place. And the 3rd ring will be for your dryglove.
3. *Cuff*. If you have cuff seals glued to your suit you can fit a ring to those seals that will be a mounting point for a glove ring.
If you're investing in a new suit then you should get a dry glove system fitted from new. Manufacturers often have their own dryglove system or pair with a brand such as Kubi to have them fitted in the factory.
Thank you a lot,@ScubaDiverMagazine. Now, is it much clearer for me. You are doing a great Job, all of the Videos are so helpful and super interesting!
Hi, hello
What's good?
I've unfortunately been stuck unable to dive for a few months because of a calve injury i had and made worse by going diving while I was still injured.
Hopefully, I'd be able to get back to diving with my friend before December. It's gonna be nice and warm here in the southern hemisphere in December. (South Africa 🇿🇦)
Any exercises you'd recommend to do daily to keep in shape to go diving?
Stretches, etc.
Your advice would be much appreciated.
Thanks for reading my comment, by the way. Feel free to not include whatever part of this comment you think you should not include when quoting it on a video, if you make a video because of it.
Thank you again.
#askmark
Correct answer......
Whenever you can afford to go from 0 to Hero
#askmark can you do a review on the RK4 please.
Ugly version of the rk3 to make more sales
Yeah, we're still waiting for a sample to test out, they keep sending stock to dealers so people can buy them...
#askmark Hi Mark, thanks for all the videos and informations! I wonder what you do for a living. You probably won't be able to make a living just from RUclips videos? Since you are no longer an active diving instructor, what do you do for your monthly salary? If the question is too personal, feel free to ignore it. :) Best regards,
Simon
This, I work for the magazine. The RUclips Ad Revenue helps but, most of the revenue comes from the sponsors
Don’t waste your money on the horizon scr just get a full ccr and be done
Really, CCR really only makes sense once you start adding He to the mix. Unless you really need the extended time (long cave dives being the most common example), anything that doesn't include He is probably best on OC (IMHO ;-).
Really... CCR really makes sense if you have fun using it and it's worth the money you spent so you don't regret it.. So who are you to tell other divers what they should do and what not?
When I buy a rebreather next week and decide to only dive at 10ft in the swimming pool for 3 hours... Who's gonna stop me? You?
@@Iceman231181No need to be so hostile. You can do whatever you want and there's no scuba police, but he has a fair point. Just like twinsets and sidemount each have their pros and cons, so do rebreathers. And when someone's asking questions here to learn, it's good to give them all the considerations.
@@Iceman231181 which rebreather? I was probably going for divesoft for videography and fun. I don't even have AOW yet.
@@Iceman231181 Maybe the brackets at the end of my comment should have been clearer. I spent quite a while looking at the options, and realised that in y case I can't justify the costs. If you're going deep enough to need some helium, then it would make sense, but if your diving doesn't need the long runtimes, and bubbles aren't a problem, why burn cash on tools that aren't the right ones?
Nope I bought one to feed bluegill in 30ft water 😂😂😂I love the technology,science and most of all the silence