Next step for longer bottom times on deep dives?

[Marie13]

Sweet, I've always considered .myself a bit of a deviant.

In this case though, since the far majority of the dives we're discussing are done on air or nitrox and historically have been, the " deviants " are those who seem to lack the intellectual abilities at depth to dive like the rest of the world and need helium to do so. No shame but I certainly would be thumping my chest about this inability.

The answer to " what color are trimix bubbles ? " is koolaid colored <130' OR
" How do know if someone is diving a helium blend within recreational limits? "" Don't worry, they'll tell you "

You’re saying people are stupid (“lack intellectual abilities”) because they get narced, want to dive deeper safely, and so use helium?

THAT has got to be one of the most stupid things I’ve ever read here, and I’ve read a lot of stupid crap. So are we going to we into a purse swinging contest about it?

Just another reason for my belief that some male divers suffer from testosterone poisoning and so stupid sh*t as a result.

I’m not a Stepford Diver, far from it. Kool-Aid? Hah.

 

[wetb4igetinthewater]

You’re saying people are stupid (“lack intellectual abilities”) because they get narced, want to dive deeper safely, and so use helium?

THAT has got to be one of the most stupid things I’ve ever read here, and I’ve read a lot of stupid crap. So are we going to we into a purse swinging contest about it?

Just another reason for my belief that some male divers suffer from testosterone poisoning and so stupid sh*t as a result.

I’m not a Stepford Diver, far from it. Kool-Aid? Hah.

Oh Marie, don’t you know some people know so much better then researchers like Dr. Mitchell? Puh-lease!

 

[doctormike]

Oh Marie, don’t you know some people know so much better then researchers like Dr. Mitchell? Puh-lease!

C'mon, stop with the name checking, that's the third time. I respect Simon Mitchell more than almost anyone else in diving. Not only is he brilliant, he's a mensch and has helped me personally on several occasions when I reached out to him, and I'm a nobody.

But are you implying that anyone who doesn't dive Trimix at130 feet is ignorant? Hard to figure out the message, but that's what it sounds like...

 

[lostsheep]

Just another reason for my belief that some male divers suffer from testosterone poisoning and so stupid sh*t as a result.

My testosterone poisoning has only led to doing awesome sh*t that less poisoned people can only dream of.

To actually say something not off topic; I think the OP should do AN/DP with helitrox. If you want to use helium, go for it, if you don't, no big deal. 130' is my limit without helium. After 130' its Tx and the rebreather for me. I get a decent deal on Helium but it's still too damn much to be using on OC.

 

[wetb4igetinthewater]

But are you implying that anyone who doesn't dive Trimix at130 feet is ignorant? Hard to figure out the message, but that's what it sounds like...

No, I don't think they are necessarily ignorant. If they say they understand that they understand the increased risks with narcosis in an emergency situation when exceeding a density of 6.2 g/L and accept those risks, I'm good with that. I'm not good with people who dismiss the science. I have had a conversation with one individual who dismissed Dr. Mitchell as "just an occasional diver" who trusts the divers at his former dive center who "regularly" dive to 70 meters or more on air. A friend of mine in Europe is friends with a number of people who died diving that way. And they don't switch to trimix until 100 meters. Now obviously there is a big gap between 40 and 100 meters on air. However, the risks increase dramatically above a gas density of 6.2 g/L. That's ultimately my point. It does come down to risk assessment, and we all assume different levels of risk. But I'll never understand or respect those who dismiss science.

 

[jf3193]

Advanced nitrox/deco procedures. No need for trimix if you're already comfortable on those wrecks. If you plan on going past 130' regularly then mix may be something to consider after a while.

thanks! Most of the 'deep' stuff I do tends to be in the 90-110 range. Nothing that can't be done on a good EAN, but always wishing I had more, since I have really good air consumption, even at those depths.

 

[jf3193]

When do you start getting narced? I’d suggest considering Adv Nitrox/Helitrox with TDI. You don’t have to use helium, but it’s good to have the option if you want to. That combo gets you down to 150ft and 35% helium. Other SBers have been very bummed after the fact when they found out they could have added Helitrox and didn’t. They didn’t know about the option or instructors didn’t tell them about it. Helitrox takes the place of Deco Procedures. You still do the DP bookwork, but don’t get the cert. It shouldn’t be an extra dives (there’s one instructor on SB who takes extreme pride in going way beyond standards) and additional class fees shouldn’t be too much, plus gas costs. The Trimix book is the Helitrox text.

I don’t know where in the US you are, but even with helium being $4-5/cft in my area of the Great Lakes, I’m still doing Helitrox and will dive it when needed. Narcosis is a very personal thing and I’m in a bad way at 130ft. It’s as much as a safety factor for me, as being able to remember the deeper wrecks I’ll dive!

it usually kicks in around 110 for me so that I notice. Id still like to stay 'longer' in that 90-100 range than the EAN 30-32 allows.

 

[jf3193]

When do you start getting narced? I’d suggest considering Adv Nitrox/Helitrox with TDI. You don’t have to use helium, but it’s good to have the option if you want to. That combo gets you down to 150ft and 35% helium. Other SBers have been very bummed after the fact when they found out they could have added Helitrox and didn’t. They didn’t know about the option or instructors didn’t tell them about it. Helitrox takes the place of Deco Procedures. You still do the DP bookwork, but don’t get the cert. It shouldn’t be an extra dives (there’s one instructor on SB who takes extreme pride in going way beyond standards) and additional class fees shouldn’t be too much, plus gas costs. The Trimix book is the Helitrox text.

I don’t know where in the US you are, but even with helium being $4-5/cft in my area of the Great Lakes, I’m still doing Helitrox and will dive it when needed. Narcosis is a very personal thing and I’m in a bad way at 130ft. It’s as much as a safety factor for me, as being able to remember the deeper wrecks I’ll dive!

South Carolina. Looking to get into the North Carolina wrecks more frequently, which are often in that 90-120 range.

 

[jf3193]

I get it, the OP just wants to do this safely:

View attachment 654724

No hour or more DECO, no crazy depths...

We have some great wrecks here in and around the limits of recreational diving that you just can't get a nice dive on without doing a small bit of DECO. Learning to do it safe makes for some great experiences. I do an annual trip to some fantastic 1800's and early 1900's wrecks that include recreational divers. To watch them fixate on their DC, and race the clock to stay out of DECO is silly....

Thats really what I was trying to find the solution for, I guess I just wrote it out incorrectly. Im still wanting to stay in 'recreational range' just extend my bottom time somehow.

 

[Marie13]

it usually kicks in around 110 for me so that I notice. Id still like to stay 'longer' in that 90-100 range than the EAN 30-32 allows.

Mine kicks in about 115-120'. You're going to need deco training to stay longer at those depths.