Advantages of Trimix?

[VooDooGasMan]

wart there is actually more than you think, back long ago most had a commercial 02 in the boat and the regs were at 20' waiting for you, diving deep air deco dives.

 

[waterpirate]

Tobin makes a good point.
That to truly move beyond the generalised disscussion here, you need training and different gear. When we talk about maximiseing your ndl, you need to move beyond puter diving and really take the time to peel back the layers on some software and make choices about conservative settings based on how your body feels. You do that by diving software generated tables specific to every dive, not by diving generic tables. You get there by taking a adv/deco course. Once you get past that hurdle ndl's really do not apply to your dive planning anymore.
Eric

 

[Ste Wart]

wart there is actually more than you think, back long ago most had a commercial 02 in the boat and the regs were at 20' waiting for you, diving deep air deco dives.

You've lost me there.

 

[danvolker]

wart there is actually more than you think, back long ago most had a commercial 02 in the boat and the regs were at 20' waiting for you, diving deep air deco dives.

I assume you are talking about "safety measures"....In south florida, this was not the practice by thinking divers...in a technical depth drift dive, you can never assume or expect the boat to be overhead when you surface, even if you are towing a float--which few divers want to do for tech level depths, due to excessive drag.
You had/have to have everything with you that you would need till you climb out of the water...if you wanted 100% O2, it would have to be clipped on.
Maybe on a baby tech dive in Cayman down a line, and back up it, you could expect a hanging tank to be there at 20 feet....but this is NOT the case for real tech dives in south florida.

 

[PfcAJ]

It's a moot point. No one can prove it's more narcotic, in theory (overton -meyer?) it looks twice as narcotic as Nitrogen. But it's apples & oranges, one is an inert gas the other metabolised. Can the 2 really be compared?

I mean there's a fair few of us that have deco'd on pure O2 at 6m (pp 1.6) anyone significantly off their chops during their deco?

Standby for science...

http://archive.rubicon-foundation.org/xmlui/bitstream/handle/123456789/2810/734806.pdf?sequence=1

 

[Tortuga68]

I mean there's a fair few of us that have deco'd on pure O2 at 6m (pp 1.6) anyone significantly off their chops during their deco?

No. So what?

 

[MXGratefulDiver]

Another thing to remember about trimix ... it sucks for a drysuit inflation gas. If you're diving trimix, you really do want a separate bottle with no helium in it for drysuit inflation ...

... Bob (Grateful Diver)

 

[down4fun]

I assume you are talking about "safety measures"....In south florida, this was not the practice by thinking divers...in a technical depth drift dive, you can never assume or expect the boat to be overhead when you surface, even if you are towing a float--which few divers want to do for tech level depths, due to excessive drag.
You had/have to have everything with you that you would need till you climb out of the water...if you wanted 100% O2, it would have to be clipped on.
Maybe on a baby tech dive in Cayman down a line, and back up it, you could expect a hanging tank to be there at 20 feet....but this is NOT the case for real tech dives in south florida.

Absolutely! You carry all your gas with you, including enough back gas to deco out on it should you lose your deco gas and/or a second deco gas. Somekind of contingency. The boat has gas is not an acceptable option.

 

[Ste Wart]

Standby for science...

http://archive.rubicon-foundation.org/xmlui/bitstream/handle/123456789/2810/734806.pdf?sequence=1

Diving Doctor - Diver Magazine

In 1985, Dr. Fowler (with Drs. Ackles and Porlier from DCIEM) published a review paper in "Undersea Biomedical Research" critically evaluating the research that had been conducted on the effects of inert gas narcosis on behavior. They concluded, "The evidence concerning the effects of hyperbaric oxygen on performance and its relationship to narcosis is too contradictory to draw any conclusions". In plain English, this means that the research up to 1985 did NOT support a conclusion that oxygen was narcotic nor even that it potentiated nitrogen narcosis.

Yay science.

have you experienced O2 narcosis?

 

[Tortuga68]

Yay science: DOES OXYGEN CONTRIBUTE TO THE NARCOTIC ACTION OF HYPERBARIC AIR?

I'd still like to hear what not being narc'd at 6m on O2 proves