Question CCR for recreational depths

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Another big big issue with ccr in recreational diving is the knowledge and training you need to have. That is way more than for an ow+aow+nitrox cert+deep diver cert. This brings also extra costs.

I had 1 open water student for the Inspiration. This guy had a high consumption on oc and wanted to dive longer. A 15 liter tank did not last more than 45 minutes at 6m depth. He did not want to wait to improve his skills, he had the money, so bought a second hand unit without any knowledge. He did not know what he bought, he only paid way too much.
In his club nobody could help him, he just thought I buy a ccr and people will learn me how to use it like you can get ow and aow in a club quite easy.
So after some calls here and there from people from the club they came to me. So we met, we did an oc dive to know each other and I could look at the unit. I was an almost brand new unit, 10 hours in the water since it was built: This mean the previous owner also did not like ccr diving. The max depth the unit had been was 11 meter. Most of the 10 hours were done in a pool, I could see in the logbook with the depth.
Further I did not see any problems with the unit. But the cylinders were out of test, the cells were death, the bov (happely it had a bov for recreational diving) needed to be serviced. All no things that are not doable. As instructor I have to advice to sent the unit back to the factory as this is factory advice, so this was done. A unit of 4 years old with only 10 hours was sent back. Also the cylinders had to become in test again and you have to service the first stages again.
The diver did not have a nitrox cert, which is required to start a ccr course. He decided to do that with his club, so he had to wait another 6 months before he could start diving his ccr. In this times it was serviced. As he did not knew anything about oxygen clean, oxygen service, risk of oxygen, cells, etc, he had another bill of 800 bucks before the unit came back divable. At this time his costs were already more than just buying a new unit.
When he was ready with his nitrox, it was winter, so he wanted to do a drysuit course first with his club. No problem, but I warned him that if the cells are over 1 year old, they are out of date again. Even if they are never used, but they are installed in the unit.
So the year came, more than 1 year came, the unit needed new cells which he really did not understand why, he decided to quit diving. Also the sorb discussion of 3 hours on a fill, that is expensive. Getting oxygen was hard. I need a bailout cylinder? Yes, do you think that you can come up safely with just that 3 liter tank with your consumption? Officially there is something like minimum of 180 bar to start a dive with, use a bove and a max depth of 18m to dive without a bailout cylinder, but is that safe? He also wanted to do dives over 20m because he was working on his aow cert with his club. That means you need a bailout for sure. At the end we have built the unit a couple of times together, but he never made it in the water. 3 years later the unit was for sale again. Had 2 owners, both never came to real ccr divers.

The same you see now with ssi divecenters, quite a lot buy a horizon. Sell a course. And then the divers who got certified never dive ccr again (scr). But they are proud to say they have a ccr/scr card(most don't know the difference, they dove a unit with a strange mouthpiece and now or almost no bubbles). That it will never give you a real shortcut if you want to go tech is no problem, the money is earned. The only times I have seen horizons in the water was with an instructor and an ssi divecenter. I have never seen a person who bought a horizon for his own private use. Then people decide to go for the revo which is a real ccr. But then they are always already technical divers.

I have done some try dives with the inspiration. I quit. It is for me a lot of work. I have to make sure the unit works. I have to clean and desinfect after a dive. And at the end, no diver ever will do a course. If you tell them about the costs, they all quit. Also this is discussed with other ccr instructors and all say introduction dives almost never follow by a course. So more quit. Serious divers that want to do a ccr course and never dived a unit most times are already adv. nitrox or higher and then you can make a dive to let them feel the unit. This divers try sometimes more units and then buy one. But recreational divers without any experience with a twinset or so, no, they just want to say: I have done a ccr dive.
 
Unless something unpleasant happens with humankind in the next few years, I imagine CCR will eventually become the norm, usable by any diver.

It would require compact AI hardware, with an extensive sensor suite that tracks all relevant metrics, incl. biometrics. Since the redundant dive computer has human-level intelligence (at minimum), it can safely monitor everything, and inform/warn the diver about any issues, and provide complete, conversational guidance. Sort of like Iron Man w/Jarvis. But you’ll still have to wait for the relevant PADI course.
 
Wonder how well that works for a raw novice?
Remember that when here in Italy CCRs were the cheap, standard equipment used by all diving schools for novices, the first OW course was 6 months long with a lot of pool sessions.
The theory was also 6 months long and it did include physics, physiology, deco diving, gas mixtures, accelerated deco with pure oxygen, deco in alpine lakes, etc...
And of course a lot about revreathers and their dangers.
All this cannot fit in the PADI model of an OW course on a pair of weekends.
So I frankly see no way to come back to that widespread use of rebreathers for training novices.
What I see, instead, is the possibity to close the gap between recreational diving and full tech diving.
This is easily possible here in Europe, where training agencies such as Cmas or Bsac already have recreational programs which include twin tanks, two independent regs, max depth of 50m in air, deco using back gas, and advanced nitrox (also used for faster deco).
When one, as me, is fully certified for these procedures as a recerational diver, going to full tech means possibly switching straight to mixed-gas CCR (heliox, trimix).
In US, where recreational limits are more limited (single tank with single reg, 40m max, no deco, Nitrox just to 40% max) there is space for "light tech" training, corresponding to the above listed procedures which are instead considered recreational here.
If also US recreational agencies extend their courses to cover these "light tech" procedures (as it is happening), then "full tech" agencies such as TDI or GUE could focus on rebreather-only training.
So rebreathers could become synonim of "full tech", expanding their market.
Indeed, I will remain within rec limits with OC air.
 
That is the question first time breathing underwater on a CCR? I really don't know.
This what happened to me in 1975.
For a couple of months we used CCRs in the pool. Then we were introduced to OC and the regulator.
And then finally using the OC in the sea (twin tanks, of course).
Starting breathing in a counter lung is actually not harder than starting breathing from a regulator.
And the CCR is lighter and more compact than a 10+10 liters steel twin tank.
In a certain sense, a chest-mounted counterlung is easier, particularly inside a pool.
 
I got Dräger dolphin ticket couple of decades ago. It is basically a primitive SCR. No o2 sensors, it is constant flow. You can just add optional o2 gauge if you like to monitor. It is pretty suitable for rec diving. There is even more primitive version of it called Dräger Ray. My understanding is Horizon is similar, as far as I have seen, Horizon is mostly marketed that rec divers can get a ticket at a "Mares" shop and when they travel they will rent it at the target location. This is a reasonable concept if there are enough dive shops providing rental.
Needles to say, my rmv is 9l, Dräger never made sense for me as I did not get much extra runtime so too little benefit and too much hassle for a little silence. Horizon is much better in that respect but again, a ccr is not that much more expensive than a Horizon..
 
Isn't the RB80 a mechanical SCR?

Rather massive which is probably why it never made it to general purpose diving!
 
The future... 🔮

How about combining a CCR/SCR which is fully automatic...

...With an automatic buoyancy control system? That would have a lever where it's up / neutral (default) / down.
 
Isn't the RB80 a mechanical SCR?

Rather massive which is probably why it never made it to general purpose diving!
It’s roughly the size of an Ali 80. There are a list of reasons it is not suitable for recreational use, but size isn’t really one of them. The Hyperion, the SF1, the SFX, the Tres Presidentes, the RB2000, and the Habanero are all nearly identical units, none of which intended for the Drager/Explorer/Horizon application.
 
Don't bother with CCR at 'recreational depths' unless you want your diving to feel more like serenely snorkeling thru schools of fish that won't get out of your way, into a bag of perfect gas at any depth you please.

That's one thing that caught me off-guard during training/first couple post training dives. It's hilarious how close you can get to fish.
 
Unless something unpleasant happens with humankind in the next few years, I imagine CCR will eventually become the norm, usable by any diver.

It would require compact AI hardware, with an extensive sensor suite that tracks all relevant metrics, incl. biometrics. Since the redundant dive computer has human-level intelligence (at minimum), it can safely monitor everything, and inform/warn the diver about any issues, and provide complete, conversational guidance. Sort of like Iron Man w/Jarvis. But you’ll still have to wait for the relevant PADI course.
With as much as standard open water training has been whittled down to a few hours of training...
There is no way CCR can be plugged into the standard PADI pump them through dive training. OC is so incredibly tolerant of abuse and neglect.

Think of the difference of spitting a mouthpiece out between OC and CCR. OC, no big deal. CCR, did you properly shut down the DSV? No? Suddenly going very negative and not have a breathing loop you can use.

No matter how much you screw up on OC you won't turn it into a caustic cocktail.

The once a decade holiday diver, OC works perfect. Many places that is easily half of the customers taking the class.
 
https://www.shearwater.com/products/peregrine/

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