OC Trimix - Are you kidding me?

Yes you are quite right, my calc was wrong should've been$847.45. (multiply not divide) My profound apologies, but thats still not $3000 secondhand us price. Even ebay uk price of £1000 is only $1694 which is still way under, so seems my statement was justified!


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I trained on OC Tri-Mix in 2001, there were not many CCR's available then. If I was doing it all over again at this moment, I would go eCCR without hesitation.
 
Here in Copenhagen Denmark, we dive in the weekends, and people dive DIR and want safe systems = OC , the depth is max 60 on our trips. so with a D18 or D12 with a 80cf + deco bottles is fine for diving. The HE cost is 0,02 EUR for a Liter, hence no need for a RB. I on the other hand has other plans :)
 
Terp said:
Here in Copenhagen Denmark, we dive in the weekends, and people dive DIR and want safe systems = OC , the depth is max 60 on our trips. so with a D18 or D12 with a 80cf + deco bottles is fine for diving. The HE cost is 0,02 EUR for a Liter, hence no need for a RB. I on the other hand has other plans :)
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Corect me if i am wrong but at 45% he your twin 18s are needing 68 euro of he?

QED with deco gas your surely still looking at 100+ euro a dive in gas

25 60m dives a year thats 2500 as aposed to CCR 25 X 20 = 500?

In the UK helum is arround 5p ltrs at shop fill cost

ATB

Mark
 
Terp - Where is the closest good wreck diving to Copenhagen - my sister lives there with her Danish husband and I had thought about taking a day out to go diving, if there is anything worth while that is close? Any thoughts would be gratefully received.
 
Mark Chase said:
Corect me if i am wrong but at 45% he your twin 18s are needing 68 euro of he?

QED with deco gas your surely still looking at 100+ euro a dive in gas

25 60m dives a year thats 2500 as aposed to CCR 25 X 20 = 500?

In the UK helum is arround 5p ltrs at shop fill cost

ATB

Mark
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HE 0,02 a L, O2 0,007 Eur a liter.
A twin 18 set with 18/45 would be around 75 EUR
a 50% 11 L 4,6 EUR ish
a 100% 7 L 10 EUR ish

so a total of 90 EUR, we do on the other hand use 1,4 ppo2 and not 1,2 as gue, so most of out mixes are a 25/25 or a 21/35. :)
 
Wol said:
Terp - Where is the closest good wreck diving to Copenhagen - my sister lives there with her Danish husband and I had thought about taking a day out to go diving, if there is anything worth while that is close? Any thoughts would be gratefully received.
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I am in Copenhagen diveclub, http://kbhdyk.dk/ , you can see our trips here, the best place to dive is in the Baltic, where viz can be 20+ meters and the wrecks are bigger. Around denmark its nitrox dives only and the wrecks are fairly good, but we only have viz around 3-5 meters, if your lucky 10-15m and they are quiet deteriorated. We usually dive where the wind is not that rough on us, so the dive location depends on the weather mostly. Lets see what is about, when you book a plane :)
 
Up to 60m I had never limits on my oc diving. I still dive oc sometimes. No problems with that. But for real long decodives and over 60m I prefer ccr. Reason: costs of helium.
From my oc experience, I think it is good if a diver has done some full trimix dives before going to ccr. Then you know how all that gasswitches, e.d. work. That skills you don't need to learn anymore. But if you really don't want, then there must be a way to start earlier with ccr diving in my eyes.

If you are gue diver, then you still need to do tech2 first (oc) before you can go to the modified JJ.
 
Although I'm not as advanced in CCR as most of the respondents on this thread I find I'm using He very much more frequently than on OC.

What we (my good lady and I) have done is to fill one of our old twinsets with 10/90. When we need a fill, we decant an appropriate amount of mix into our dil cylinders and top up with air. Due to being new to CCR we are currently diving in the 30 - 50 metre range, but we now use mix for anything sub 30 metres, which is pretty much every dive.

When one twinset gets low we top the whole thing up with air to make a bank of a useful mix and fill another with 10/90. Quite efficient so far.

Rich

P.S. We originally asked for 12/88 because the numbers work out nicely, but 10/90 is what we got.
 
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Another interesting item to discuss is the cost of CCR trimix courses and OC trimix courses. I've had some instructors locally describe their classes as nearly %50 less than a CCR trimix course which I was surprised.

I have also seen a few CCR folks go back to OC to get the cheaper cert then dive CCR trimix. This doesn't really make sense to me and my goals/perception of the safest solution.

Any thoughts on that fellas? I know I probably have my mind made up that I will take trimix on a CCR no matter what but would be interested in those out there who had an opinion one way or the other.

Thanks,
Garth
 
Terp said:
I am in Copenhagen diveclub, http://kbhdyk.dk/ , you can see our trips here, the best place to dive is in the Baltic, where viz can be 20+ meters and the wrecks are bigger. Around denmark its nitrox dives only and the wrecks are fairly good, but we only have viz around 3-5 meters, if your lucky 10-15m and they are quiet deteriorated. We usually dive where the wind is not that rough on us, so the dive location depends on the weather mostly. Lets see what is about, when you book a plane :)
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I know plenty of ex GUE divers who now dive CCR

I talked to GUE UK divers like John Thraves and Dave Robins as to why they stoped diving DIR OC and the simple answer was they couldn't fill a boat with people rich enough to afford the gas.

I also know two RB80 divers who quit and went CCR as the gas logistics of the RB80 for cave diving became daft for the caves they were diving.

I dont actualy know any GUE divers activly doing deep mix diving (60m+)

I know Tec2 level divers who have had to do resits as they havent done enough Tec2 level dives to kep their cert cards up


I am a big fan of GUE and I thank the gods they have now decided to try and introduce CCR into their diving.

I never thaught it would happen in my diving lifetime but it was inevitable if they wanted to survive as a tec diving organisation.

ATB

Mark
 
GUE does have some great divers. I'm a big fan of JP Bresser and his videography. Kicks ass.
I think the caution they take with gear change is respectable from a safety perspective but that's just my opinion which I don't know much about GUE other than what I read.

Garth


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ccr courses seems te be more expensive than oc courses. But I learned more in my oc full trimix than my mod3 course. Maybe it was because I was an experienced oc diver?
For me there was a limit on what I wanted to pay for courses. That was reason I never did a gue course.
But cheap technical diving is impossible, even oc or ccr.
 
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Norway still seems keen on OC diving in the GUE circles, I think that the cost of living here also makes the cost of OC trimix less painful that in other parts of the world. Booze is so expensive here that we have the "Reverse martini effect." The cost of removing each 10m of narcosis is only the cost of a Martini. So for a 18/45 dive you are only looking at the cost of 5 drinks.

I guess that's why over on the Norwegian forums a current trend is "Double 18L or Double 20L cylinders..." :)
 
Jakarta has the extremes in gas prices:

$7 for 6 cum (210 cuft) of oxygen and $450 for He. 10 cum is $850 inc the cylinder......Ouch
 
Mark Chase said:
I know plenty of ex GUE divers who now dive CCR

I talked to GUE UK divers like John Thraves and Dave Robins as to why they stoped diving DIR OC and the simple answer was they couldn't fill a boat with people rich enough to afford the gas.

I also know two RB80 divers who quit and went CCR as the gas logistics of the RB80 for cave diving became daft for the caves they were diving.

I dont actualy know any GUE divers activly doing deep mix diving (60m+)

I know Tec2 level divers who have had to do resits as they havent done enough Tec2 level dives to kep their cert cards up


I am a big fan of GUE and I thank the gods they have now decided to try and introduce CCR into their diving.

I never thaught it would happen in my diving lifetime but it was inevitable if they wanted to survive as a tec diving organisation.

ATB

Mark
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You're in the wrong part of the country :D Look west!
 
Garth said:
Another interesting item to discuss is the cost of CCR trimix courses and OC trimix courses. I've had some instructors locally describe their classes as nearly %50 less than a CCR trimix course which I was surprised.

I have also seen a few CCR folks go back to OC to get the cheaper cert then dive CCR trimix. This doesn't really make sense to me and my goals/perception of the safest solution.

Any thoughts on that fellas? I know I probably have my mind made up that I will take trimix on a CCR no matter what but would be interested in those out there who had an opinion one way or the other.

Thanks,
Garth
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I did both, oc and cc.
I did learn really much more with my oc trimix course than with the mod3 course. Ok, I am an experienced oc diver before I changed to ccr. But deco=deco, I already dived with 3 and more stages, a leash=a leash, trim=trim. And if your buoyancy is not good, then you would not start a full trimixcourse. Skills are logical with some use of brains.
I know there are enough divers that overestimate themselves. I heard horrorstories of difficult ccr courses, but I think it is the diver that is not ready for it. And yes, then it is most easy not to follow a ccr course, or to do it on the easiest way.
 
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Bobjr said:
You're in the wrong part of the country :D Look west!
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They are keeping it very "under the radar"

I always thaught Graham Knot was the main GUE dive boat in the west country and the feed back I have got from George (Bassed in Dorsett) is nothing much is going out. I also struggle with whos capabul of doing Tec2 level dives? Who are they? I know several Tec2 level GUE divers but most are inactive and the rest are doing mainly 45m-50m max stuff. But as you say I dive in the SE so thats my main area of knowladge.
 
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