Is 130 ft too deep?

[ScubaDubaDoo]

I am really trying to decide if I have the ability to do the dive.

I think that only you can answer this question.

I usually go by this rule "If I have to ask the answer is probably "No". I learned this from making a wrong choice in Fiji.

So I'll leave you with this advice: Find time to dive before your trip so you can keep up your skills. If you decide to do this dive do it knowing that you do not have to go to 130'. Don't feel obligated to descend beyond what you feel comfortable doing.

 

[DORSETBOY]

I think we can dispense with the personal attacks in this thread. If you can't make your point without insulting others then go play somwhere else.

James

well said James, I think anyone is more likely to listen to someone's point of view if thy make it without lowering themselves to the gutter level

 

[JimC]

Take a "deep" class and a Nitrox class (you want to avoid getting narced)

Nitrox isn't going to help you much at that depth. Many people beleive that O2 is just as narcotic as N2 and your not looking at very much advatage useing something like EANx27.

 

[Curt Bowen]

How does that idea jive with the standards of the agency(ies) through which you are certified as an instructor?


Personally I have no doubt that you are skilled enough to take her to 160 with you doing the diving for both of you. However, I think you mentioned that you were an IANTD instructor and I'm too lazy to check right now but if so per IANTD standards...

Before you could take her to 160 you'd first have to get her through the Advanced Nitrox and Deep diver course, experience pre-reqs (I don't remember what they are exactly but we could look them up easy enough) and all the confined water and shallow water skills work for the tecnical diver class.

Once she met all those requirements you could take her to 160. Of course by then there's a pretty good chance that she could take you to 160. LOL

I'm not misunderstanding IANTD standards am I?

I also feel I need to repectfully point out that encouraging one to engage in technical diving without proper training is in violation of the Scubaboard TOS. Offering to take her to 160 or suggesting that it would be wise for her to do such a dive, even with some one of your reputation, makes it sound like you're doing just that.

Here is an idea!

I could put some helium in her cylinder and make the dive a 60 foot narcosis equivalent. recreational limits

Would that work?

 

[Web Monkey]

Nitrox isn't going to help you much at that depth. Many people beleive that O2 is just as narcotic as N2 and your not looking at very much advatage useing something like EANx27.

There's less of a chance of getting significantly narced with 28% O2 than air. That would make EAN28 a better choice for 130' than air.

O2 Narcosis doesn't exist. See http://www.scubaboard.com/archive/index.php/t-238.html

Terry

 

[JimC]

O2 Narcosis doesn't exist. See http://www.scubaboard.com/archive/index.php/t-238.html

This linked post actualy states that you can't mesure it, and it may or may not be there.

My personal experince is that I have no diference between Air and 32%. It can't be proved ether way.

Even looking just at the ppN2
28% @ 130 has 3.56ppN2
air @ 130 has 3.91ppN2

So your talking, if we completely ignore the O2, a whopping 0.35bar diference.

 

[MikeFerrara]

I consider O2 narcotic in my END calculations. Meaning that with trimix I trea everything except the helium as narcotic. It only makes a difference of a few feet, it's more conservative and the math is simpler.

To think that using EAN28 is going to provide a narcosis advantage over air at that depth is kidding yourself. At those depths we shoot 20 or 30 percent helium in there for that.

 

[Web Monkey]

I consider O2 narcotic in my END calculations. Meaning that with trimix I trea everything except the helium as narcotic. It only makes a difference of a few feet, it's more conservative and the math is simpler.

To think that using EAN28 is going to provide a narcosis advantage over air at that depth is kidding yourself. At those depths we shoot 20 or 30 percent helium in there for that.

I didn't say it would eliminate narcosis, I said it would be "better".

Terry

 

[MikeFerrara]

I didn't say it would eliminate narcosis, I said it would be "better".

Terry

Not that I've ever noticed.

 

[dweeb]

Here is an idea!

I could put some helium in her cylinder and make the dive a 60 foot narcosis equivalent. recreational limits

Would that work?

That's it, put her on trimix without training.

Keep digging, Curt.