toxing while on ffm/gag strap

[bazSXD]

I think the secret is to pull the DSV/BOV down below the chin.

It is never a smart move to pull the loop below the reg you have bailed out tooooo. The loop if closed or if it has any residual gas in it will try to float upwards and dislodge the reg. We always teach that the loop should be above the head to avoid such problems.

Baz

 

[Randy Thornton]

Baz,

I think this is a unit specific issue. Some BOV/DSV loop combinations are happy to sit below the bailout reg and do not push up on the reg. They will always have "residual gas" in them unless they are flooded. The HammerHead CCR for example is quite uncomfortable when pulled above the bailout reg. It really is a unit by unit specific issue. Just one more reason to have unit specific training.

Regards,
Randy

It is never a smart move to pull the loop below the reg you have bailed out tooooo. The loop if closed or if it has any residual gas in it will try to float upwards and dislodge the reg. We always teach that the loop should be above the head to avoid such problems.

Baz

 

[AdrianSmith]

I added a gag strap to my Prism 2 when I first learned to dive it.

Which strap did you add, and did you have to do any finagling to get it fit?

Thanks!
-Adrian

 

[bazSXD]

They are quite expensive for what they are but I think they are worth it.

http://www.xsscuba.com/maskfd_access.html

$45 a pop .... regards Baz

 

[bazSXD]

"Simon's talk was interesting at Oztek where he mentioned that a O2 convulsion can be delayed. E.g you've come off the high ppo2 and on to a lower O2 gas and you'll still tox. "

Having survived an O2 hit I would say that you cannot delay a hit. I felt it coming on and switched to air but it still hit me twice on the way up. You can only get rid of O2 by metabolism, so once the O2 is high it is high and unless you get it very very early on you will get a hit .... trust me I know. If you keep pumping more gas into you ( using a FFM ) then you will fit and fit and fit. What does that do - cook the brain maybe ???

I guess we need Simon to cover this for a firm answer ... me I'm just a bush lawyer or doctor in this case so its only theory and bull ... regards Baz

 

[Capt Morgan]

http://www.xsscuba.com/maskfd_access.html

$45 a pop .... regards Baz

It was the Drager one that I was referring to.
They come complete with the mouth piece and a
sort of lip guard that helps prevent water entering
if unconscious.

 

[Johnnyh]

Two points...

NERD - when diving a NERD, the loop under chin during bailout makes it available. Above the head, well, it's kinda hard to read then.

Mask strap under hood, gag strap over hood.

 

[rjack]

It was the Drager one that I was referring to.
They come complete with the mouth piece and a
sort of lip guard that helps prevent water entering
if unconscious.

View attachment 7108

The lip guard helps keep water from pushing in the corners of your mouth while scootering too. A nice plus.

 

[Jeff Pack]

"Simon's talk was interesting at Oztek where he mentioned that a O2 convulsion can be delayed. E.g you've come off the high ppo2 and on to a lower O2 gas and you'll still tox. "

Having survived an O2 hit I would say that you cannot delay a hit. I felt it coming on and switched to air but it still hit me twice on the way up. You can only get rid of O2 by metabolism, so once the O2 is high it is high and unless you get it very very early on you will get a hit .... trust me I know. If you keep pumping more gas into you ( using a FFM ) then you will fit and fit and fit. What does that do - cook the brain maybe ???

I guess we need Simon to cover this for a firm answer ... me I'm just a bush lawyer or doctor in this case so its only theory and bull ... regards Baz

Any stats on how many people have survived an Ox TOx, verus fatalities?

 

[tripntx]

Which strap did you add, and did you have to do any finagling to get it fit?

Thanks!
-Adrian

It fits without requiring any modification. I'm happy with it, and will always dive with one.

Purchased this one from Add Helium when they were $122. It works with Hollis DSV and Hollis BOV. Love it. http://store.addhelium.com/rEvo-safety-mouthpiece-bite-piece-with-straps_p_497.html

 

[tripntx]

Mask strap under hood, gag strap over hood.

I have actually thought about doing this, just hate wearing hoods.

 

[PeterN]

I have actually thought about doing this, just hate wearing hoods.

Wishing I had the choice to leave off the hood as it is too cold here to go with out.

I tried mask strap under hood but found it go be too much faffing. I am using the Draeger gag strap over my mask strap. I don't do it up too tight and find I can still remove the loop with out too much trouble.

Peter

 

[Michael Thornton]

It is never a smart move to pull the loop below the reg you have bailed out tooooo. The loop if closed or if it has any residual gas in it will try to float upwards and dislodge the reg. We always teach that the loop should be above the head to avoid such problems.

Baz

Baz besides this being a unit specific choice even units that don't have t pieces and might be more comfortable to raise the loop over the head in a bail out scenario I still teach to tuck under the reg if swimming out of an overhead environment. In contrast to what you say I would say having a loop floating above your head while swimming out of something is never a good idea.


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[bazSXD]

Horses for courses .... cave yep I can see this, open ocean nah not convinced ... regards Baz

 

[lizardland]

I've always found it far more comfortable to pull it down and to the side so I don't have the big lump of plastic under my chin and the corrugated hose sits quite comfortably. Never liked the idea of having the loop over my head.

 

[GLOC]

Any stats on how many people have survived an Ox TOx, verus fatalities?

No, not as far as a I know. This is one of the things that Paul Haynes was looking for.

Divers are not normally very good at reporting incidents, especially when it comes to something that they did wrong which is the most likely reason for an OxTox. Fatalities are notoriously difficult to determine whether OxTox was the issue, especially if the cell/system data has not been captured.

Regards

 

[serpentara]

I was taught to let my loop float above my head during bailout, that way I could burp it as I ascended to help control bouyancy instead of waiting for the OPV to vent.

 

[Garth]

Baz besides this being a unit specific choice even units that don't have t pieces and might be more comfortable to raise the loop over the head in a bail out scenario I still teach to tuck under the reg if swimming out of an overhead environment. In contrast to what you say I would say having a loop floating above your head while swimming out of something is never a good idea.


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The only time I let the loop over my head is when suiting up to look down easier. Bailout is with the loop under my reg and OPV wide open. As Michael said it would probably get caught and rip on something above the head which would totally suck.
I guess it's user preference and unit specific.
Garth


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[rjack]

I have found the buckles on the drager gags to be pretty iffy. They are very hard to adjust with gloves on beforehand (to snug up the strap) and then hard to loosen if you want the loop to hang lower in a bailout scenario. This is definitely a product which could be improved upon by a competitor, both price and function.

 

[GLOC]

I was taught to let my loop float above my head during bailout, that way I could burp it as I ascended to help control bouyancy instead of waiting for the OPV to vent.

Interesting, this is what I was taught too on the JJ.

Regards