Deep diving with a FFM

[Brett Hatch]

FFMs are a solution in search of a problem. There are types of dives where they are needed, but deep air just isn't one of them. They do not solve the narc issues you've described, and introduce additional safety hazards. Neither does nitrox, by the way: there is exactly zero evidence of EANx reducing narcosis, because oxygen is about as narcotic as nitrogen.

 

[Eric802]

Deep air is out of fashion and considered dangerous. Some still do it, but it’s not considered good practice.

Well, as helium keeps getting more and more scarce, it might have a bit of a resurgence.

 

[Fishdip]

FFMs are a solution in search of a problem. There are types of dives where they are needed, but deep air just isn't one of them. They do not solve the narc issues you've described, and introduce additional safety hazards. Neither does nitrox, by the way: there is exactly zero evidence of EANx reducing narcosis, because oxygen is about as narcotic as nitrogen.

I think I was not clear with what I said. I have not once said they would solve the issue I ask if the issue takes place would they help with the whole sucking in water part due to reg out of mouth.

 

[Marie13]

Well, as helium keeps getting more and more scarce, it might have a bit of a resurgence.

Then it’s time to go CCR! Being narced out of your gourd is dangerous.

 

[Fishdip]

You don’t think a FFM would be extensively used already if it was so great for deep diving? It’s not and there are good reasons, primarily the complications already mentioned.

Not sure what your issue is but all I did was ask why they are not used. For some reason you act like I care or want to debate the issue. All I want is XYZ reasons they dont work.

 

[Marie13]

Not sure what your issue is but all I did was ask why they are not used. For some reason you act like I care or want to debate the issue. All I want is XYZ reasons they dont work.

You’ve already been given the reasons.

 

[Fishdip]

You’ve already been given the reasons.

No ****. Guess I found the troll of the forum…

 

[NorCalDM]

FFMs are a solution in search of a problem. There are types of dives where they are needed, but deep air just isn't one of them. They do not solve the narc issues you've described, and introduce additional safety hazards. Neither does nitrox, by the way: there is exactly zero evidence of EANx reducing narcosis, because oxygen is about as narcotic as nitrogen.

Also EANx means less depth, the more O2 you add the less depth you go.

 

[RyanT]

Consider that you and your buddy are both in FFMs. Your buddy has an OOG emergency and needs gas from you. How do you donate quickly? Second, as you go deep, gas density increases. That increases the work of breathing, and increases CO2 retention. FFMs excerbate CO2 retention.

 

[Fishdip]

Consider that you and your buddy are both in FFMs. Your buddy has an OOG emergency and needs gas from you. How do you donate quickly? Second, as you go deep, gas density increases. That increases the work of breathing, and increases CO2 retention. FFMs excerbate CO2 retention.

Do you have any material on FFM and co2 retention? The only info I find on that has to do with that issue in snorkel FFM and that is all I can find…