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Could be narcosis. 40 metres on air is on OC relatively easy. On my rebreather I choose trimix for anything under 30 metres. Have experinced myself on a rebreather th WOB is greater than OC. This leasde easily to this kind of feeling not well at greater depth. What also could contribute to...

Yep, realized it now. Should be reading SB while working :banghead:

Probably. My partly helium filled stages float more than comparable air filled stages.

Can only comment on my experience with the JJ-CCR. What I do is fill for theoretically 3 hours worth of diving. I keep track of every easy dive I do and, depending on dive lenght, use the scrubber for max. 3 dives or 4 weeks. More dives or longer time, means throwing away the sofno, no matter...

Mine do sting, but it's tolerable. I rather have them sting before the dive then later on.

They do at first, but I think it's better getting used to it before the dive than having them sting when I have to unexpectedly remove or loose my mask during the dive (never happened by the way, but there's always a first). This is because I do not close my eyes under water. You can't see much...

Let's agree to disagree. You have your opinion, I have mine. I know what I'am doing and in what circumstances I can do these things safely and when not. That doesn't mean I'am an 'Top gun' diver in any way, just a diver who has learned to do things somewhat differently than what is taught (for...

Just make sure there's no issue. If circumstances demand for it I will of course have the reg in my mouth, but there are very few circumstances that demand it. Just get used to function under water without mask and reg under water. It's all part of normal tech diive training. If you have never...

Why not? I'am asking because a lot of people seem to think this is very dangerous behaviour. In reality a skilled diver should be confortable without an reg in his/her mouth under water. No reg is no reason to panic For me it's an easy way to get my body in 'dive mode'. Besides that, I dive a...

Diving a ccr is no rocket science, but training is usefull to know what to do when things go wrong. I'am at 120 hours and still leraning every dive. There's so much to learn that isn't taught in class.

I'am panicking every dive then I guess. I wear my mask on the back of my head for convenience reaseons. Mainly because there's a backup reg or a ccr loop under my chin. No place to put a mask. Oh, and by the way I do a giant stride without my regulator in my mouth and my mask placed on the back...

I get severly narced beyond 30 meter's on air, so for me a ccr with trimix is a no brainer wanting to dive deep wrecks. Besides that, I like the added 'gas time' and warm breathing gas when doing cold cave/mine dives. It makes me uneasy to have aa fairly limited amount of cold gas in those...

The immediate problem I see is that the long hose config won't work according to GUE standards with a chest mount rebreather. Next to that, dealing with a standard JJ, multiple stages and a DPV is something you really have to learn and practice. Diving off a boat with a clutterred chest, doubles...

My take: it does not fit the GUE standard of D12's as far as I can see (too much clutter on the chest with a already relativly complex config with D12 and stages). Even the JJ is configured in a way that it resembles a doubles config which seems to me seems to be the GUE gold standard. So I...

I have set a warning when my oxygen drops below 70 bars. Just as a precaution so that I know I should be heading back or losing gas. Never needed it by the way. You have to do one heck of a dive yo use 200 plus bars of oxygen on a rebreather. Use transmitters too. They also warn me if I forget...

Oxygen? Take a 40 cuft/7 liter plugable O2 tank with the team and you're good to go. I have never used all my oxygen by the way, not even 1/3 during a dive. The limiting factor for me is theoretical scrubber time. I plan on that time although I know it lasts much longer.

This one is easy for me. Overhead or deeper than say 30 metres = CCR. I consider my CCR saver than OC under these circumstances. I still do dive less deep or non overhead with OC, but it is becoming more of an exception than an rule.

I did intro and full cave om ccr. Is it wise to do so? Don't know because I can't undo my training and go an other route. Speaking for myself, I'am very comfortable with my ccr, but in hindsight doing it OC would have been easier in some ways. Buoyancy is a lot harder with ccr while placing...

It's available now. Don't why it was'nt available for a while.

I learned the hard way too. Scrubber life is theoretical, not an absolute truth. When doing a demanding dive, always use a fresh scrubber. Also replace scrubber content after a month max. Even when you're not using it, the filling deteriorates anyway. What I do these days is: 1. Replace before...