Gue debating use of eccr rebreathers?

db8us

Who said it has not been done during the inital testdives?

Buccaneer

Did I see a swivel on top of the Halcyon can? ( in the pictures of the unit posted earlier in this thread ).

What is that port for?

Janos

I am reasonably sure that senior GUE people have try-dived many ECCR. I think it's the limitations of galvanaic O2 sensors that worry them.

Janos

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graham_hk

I think that it is the limit of the scrubber that Casey was talking about - rather than the limit of SCR. Compared to the bailout needed for extreme dives the drive gas is minimal (say 2-4 Al80s) thus CCR does not offer any real advantage (you'd need two stages anyway - dil and O2) and there is no CCR that can do 10h + or so on one fill.

CCR does offer some advantage for ocean bounces (maybe you can carry less stages)- but I'll stick to my RB80

Graham

trob09

If I misinterpreted the comment, I stand corrected. Even so, I stand behind my comment regarding it being encouraging that name-calling and finger-pointing appear to be subsiding.

graham_hk

Absolutely

RonMicjan

you may want to go look at the expeditions done on the Cis-lunar Mk5, where bottom times were over 12 hours. the Meg with radial scrubber will do 10 hours in warm water.

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graham_hk

Sure you can push a bit more out (different design or scrubber medium) but its not markedly different from what they are already doing

Mark Chase

In the UK in SE England we pay 0.9pltr for 02 and 1.4pltr for He.

A fill is about £1 per % He

See local example here Lakeside Diving

Gas toping is possible but i have to go to lakeside for it (90mile round trip). My more local dive center (65mile round trip) will blow off all the gas in the tanks and fill from scratch because he doesn't have a trimix analisor and he fills without a booster for his He.

Both dive centers often cant do while you wait fills. So for lakeside i am looking at 180miles of driving costing about £33 in fuel. Then I pay my £40 for my twin 12s of 14/60 and another £35 for my deco gas.

Total dive cost is now £108 for gas for a twin 12s dive. ANY dive on a CCR costs less than £20. A three hour dive to 80m and back costs about £20


Lime fill £8 50-80bar 02 out of a 3ltr £2.16 80-100bar mix £10 TOTAL: £20.12p

Cells cost 165 a year over say 80-100 dives a year £2.00 per dive.

I go to the dive center once every four-six months and get 50ltrs of mix and 50ltrs of 02 and decant from there so my fuel bill for the year is 6-8 trips not 120-160trips.

Batteries etc ?? lets just say £30 a dive and have done with it.

SO a mix dive OC costs me £108ish and CCR it costs me £30.00 a saving of £78over avg 50 trimix dives a year thats £3900.


The local DIR boys tell me they don't pay anywhere near that much for gas, However they haven't actually been able to tell me where within a 50mile radius of Maidstone I can get this cheep Helium.

SO lets be generous and say I only save £2000 a year


What this means is i do far more exploratory diving than the average OC mix diver. I am far more willing to risk a dive on an unknown than a OC mix diver. I am far more willing to book a boat to do deep undived wrecks than an OC diver too, because if we get blown out I wont be wasting gas on shallow dives I can happily do a shallow 30m dive on 14/60 Trimix.

This was all my kit and ALL my gas for a weeks livaboard trimix diving planned to dive 6 dives between 60 and 80m in Malin Head.




In truth I like OC diving. I feel its easier than CCR and less work. OK its colder and more dehydrating I grant but diving twin 12s now is like skinny dipping compared to diving a CCR.

I just cant afford to do the diving I do on OC. QED i am not a GUE diver but i would be if CCR didn't exist or if GUE did CCR.

No doubt the GUE party faithful will say there is no compromise on cost saving when it comes to the safety of the diver. However I find such concerns hilarious when were talking about a risk assessment for a diver spending 10Hours in the water. Diving is dangerous at all levels and very very dangerous 2+ hours into the arse end of some cave.

Its all about managing the risk, and to me thats GUE's party piece.

So I hope that whilst the aspects of diving CCR SCR and OC are being discussed at the conference, that some small part of the discussion will cover the 90% of divers doing exploration diving who are working on a very very tight budget without sponsorship a often without willing free support divers.

If you don't then I see the future progression of a GUE diver as being:

GUEF Tech1 possibly Tech2 then TDI CCR Mod1

ATB

Mark

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lizardland

All that lovely CK kit and you sit a Gavin next to it. Mark, Mark, Mark, Mark, Mark... just when everyone thinks you've seen sense you go and wreck it...

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