Requiring shallow helium mixes?

[kensuf]

Please stop posting He prices .... It's making my accountant/blender side of me cry inside .......

:S
_R

Don't want my wife to see them either..

 

[Kevrumbo]

Just got my helitrox cert on the JJ - one of the nice things about CCR is that it removes that cost-benefit analysis from the decision. It costs so little to add helium to the dil, and hopefully I won't be going through a lot of bailout!

Yea, not even a consideration cost wise.

In my rough estimate if you make 100 helium dives on a CCR vs OC you have saved enough $ on the price of helium to justify the cost of the CCR.

A single 12L bailout cylinder filled with 18/45 Trimix to 230bar would cost $260 USD in Truk -->Oxygen: $1 per 28 liters, and Helium: $5.75 per 28 liters. (28 liters is approx 1 cuft).

 

[PfcAJ]

A single 12L bailout cylinder filled with 18/45 Trimix to 230bar would cost $260 USD in Truk -->Oxygen: $1 per 28 liters, and Helium: $5.75 per 28 liters. (28 liters is approx 1 cuft).

What do they do with that gas after you leave?

 

[RainPilot]

Our local CCR operator has a nice policy. They don't charge for unused bailout. They keep 80's of all the usual suspects there and you take as much as you need.

If it needs refill they charge you for used.

 

[Compressor]

Anyone else surprised as the poll results begin to take shape?

I am surprised. The poll tells me that more people are willing to go deeper on air or higher PN2.
Perhaps this reflects the higher costs of training and gas (He) as well as availability of He.

 

[100days-a-year]

Price and practicality for me.

200 to 300 of my dives per year are >130'.

I do 5 to 7 per day using approx 80 to 100 cuft per diving 120s

There are 2 or 3 divers on board for 3 to 4 day trips

@ 20+ cuft HE per tank to get me roughly to a 100ish END it would take a 6000 psi T per person minimum

On my 33ft boat there is room for 2 Ts,I opt for two 02 cylinders so we can dive lean nitrox and have cushion for IWR

Now,if I didn't have 2000 pounds of ice on board I could carry them but I'd be paying to go dive instead of getting paid and Mrs 100days would light me on fire

 

[Compressor]

Price and practicality for me.

200 to 300 of my dives per year are >130'.

I do 5 to 7 per day using approx 80 to 100 cuft per diving 120s

e

Curious: can you give us a sample of the 5-7 dives you make? Time/depth? Gas used?
Thanks

 

[100days-a-year]

DISCLAIMER, not a suggested dive plan
In fact you will likely get bent maimed or worse
150' 12 to 15 BT ---20 to 25 RT decreasing BT to 8 to 12 by dive 5 keeping RT 20 to 25
EAN 22 TO 26 depending on proximity of deeper shelf break

Decrease my BT by a minute or 2 for every additional 20 feet RT stays similar.

Using Orca air computers but I ran most of the permutations of my trips on VPM-A-0 on Air a few years ago.The lean nitrox is our "safety buffer"
Compared to running 2 or 3 longer dives requiring doubles and stages,I get more total BT,less total deco and a far more streamlined rig.We have 10s of thousands of dives with these profiles and as long as the RTs stay short via shorter BTs we have an incidence of DCS comparable to typical sport diving.

Have fun dissecting that.

 

[northernone]

DISCLAIMER, not a suggested dive plan
In fact you will likely get bent maimed or worse
150' 12 to 15 BT ---20 to 25 RT decreasing BT to 8 to 12 by dive 5 keeping RT 20 to 25
EAN 22 TO 26 depending on proximity of deeper shelf break

Decrease my BT by a minute or 2 for every additional 20 feet RT stays similar.

Using Orca air computers but I ran most of the permutations of my trips on VPM-A-0 on Air a few years ago.The lean nitrox is our "safety buffer"
Compared to running 2 or 3 longer dives requiring doubles and stages,I get more total BT,less total deco and a far more streamlined rig.We have 10s of thousands of dives with these profiles and as long as the RTs stay short via shorter BTs we have an incidence of DCS comparable to typical sport diving.

Have fun dissecting that.

Fascinating, happy you are willing to give us a look at what has been working for you. Would you be willing to spit this into it's own thread? I suspect the discussion may be very interesting... brace yourself.

Cheers,
Cameron

 

[Compressor]

Fascinating, happy you are willing to give us a look at what has been working for you. Would you be willing to spit this into it's own thread? I suspect the discussion may be very interesting... brace yourself.

Cheers,
Cameron

Yes it is amazing.