How much gas

[MATTBIN]

Do you plan to have enough gas to get your buddy up if he has a catastrophic failure and loses all his gas. Talking about a 10 min deco single gas, air or Nitrox, dive here none of that stages and funny mix dive God
stuff Twin tanks obviously, I wouldnt plan deco on a single tank, probably not even single/pony either.

If Nitrox do you dive the same mix?


Matt

edited to add line about tank config due to misunderstandings

[Gavin Smith]

Yes. .

[Clare Gledhill]

Matt - the amount GUE divers are trained to retain depends on the depth of the dive we are doing.

Essentially though we plan that if a situation has occured both divers will be stressed and the SAC may reach 30 lpm. So the answer is 30 lpm x 2 divers x average ata x the length of time it will take to ascend safely to either the surface or the next available gas supply.

So if you allow say 8 minutes for an ascent from a 30 metre dive the answer is 30 x 2 x 2.5 (ata) x 8 = 1200 litres of gas - 50 bar in twin 12s or 100 bar in each of your indies.

And yes - I will be breathing the same as my buddy - unless I'm diving with Daz that is

HTH

[zepp]

If you plan your dive correctly, neither of you should be in a position where you lose ALL your gas. That is why we use manifolded twins with isolators. You should always plan for enough gas to bring you back to the surface including stops if at any point during the dive you lose upto half your gas. Also you should NOT be planing for your buddy to 'get you out of jail' as he may not be there when sh#t happens.

[warmwaterdiver]

if diving with a buddy, yes, its always nice to come out with them, of course that does work two ways though, ie they should have enough gas for me, worst case is we're on the surface without having done the deco stops, we'll sort that out after

[RichW]

Originally Posted by zepp

If you plan your dive correctly, neither of you should be in a position where you lose ALL your gas. That is why we use manifolded twins with isolators. You should always plan for enough gas to bring you back to the surface including stops if at any point during the dive you lose upto half your gas. Also you should NOT be planing for your buddy to 'get you out of jail' as he may not be there when sh#t happens.

You're right that you should plan to always be able to get out if the need arises.

To that end, I don't plan to have my buddy rescue me should I have a gas failure. However, I do plan to be able to bring my buddy back should he/she had a catastrophic gas failure.

The difference between the two approaches may appear academic, but they are in fact a world apart.

Rich

[gobfish1]

Yes i Do,
He has the car keys

[vid]

Originally Posted by RichW

I do plan to be able to bring my buddy back should he/she had a catastrophic gas failure.

Originally Posted by Gledders

So the answer is 30 lpm x 2 divers x average ata x the length of time

I'm not GUE trained, but I have exactly the same conservative, risk-minimising philosophy/attitude - although I work on a SAC of 25lpm for me and my buddy, just because we normally breathe a lot less than that - otherwise it's as gledders says

vid

[vid]

Originally Posted by MATTBIN

none of that stages and funny mix dive God
stuff

i know you said don't discuss this, BUT....

deco gas in the stages carried is twice what is require (complete bailout for me and my buddy using our conservative SAC of 25lpm)

Originally Posted by MATTBIN

If Nitrox do you dive the same mix?

of course, otherwise we do different stops

- now admittedly, there have been divers i've been with, who i wish were on a completely different planet, let alone a different stop (but hey ho)

vid

[Mark Chase]

No: He takes a redundent gas supply with him or he is on his own


Unless... Redundent gas supplys are not available or if I am diving with a DIR diver.


ATB

Mark Chase