What is the Best Mix Ever?

[FIXXERVI6]

For me there is a big diff. in having a clear mind when diving trimix over air. Not to mention at depth it is alot easier to breath.

So I guess you'll be taking some Helium up on your next deep broken bow dive?

 

[amascuba]

I believe the reason why you want to get off the bottom quick, at a 30fpm rate, to your first stop is to drive the gradient. The idea is to get the inert gases to start to exsolve from a solution so that the gases can be passed to your lungs for a more efficient means of off gassing. Once you get that process started and have completed your first stop then you slow the ascent down to 10fpm after each stop.

 

[FIXXERVI6]

I believe the reason why you want to get off the bottom quick at a 30fpm rate to your first stop is to drive the gradient. The idea is to get the inert gases to start to exsolve from a solution so that the gases can be passed to your lungs for a more efficient means of off gassing. Once you get that process started and have completed your first stop then you slow the ascent down to 10fpm after each stop.

On mix that is my understanding for an ideal ascent 30fpm then to 10 once you hit your first stop.

 

[Soggy]

Yea I know I've paid the price on the hang time for it but what can I say, I don't get in a hurry, I adjust my tables to compensate for it but I"m just a slow movin kind of guy, if I was ascending an anchor line I could probably peg the speed better, but when coming up slopes and stuff like that, I poke.

Well, then you're just doing a multilevel dive and I'd treat it that way.

 

[loosebits]

I believe the reason why you want to get off the bottom quick at a 30fpm rate to your first stop is to drive the gradient. The idea is to get the inert gases to start to exsolve from a solution so that the gases can be passed to your lungs for a more efficient means of off gassing. Once you get that process started and have completed your first stop then you slow the ascent down to 10fpm after each stop.

Agreed but in a lake, that's difficult. I'd rather lenthen by deco oblication then do a mid water ascent from 160 to say 70' in 5' of viz and then have to swim horizontally to the bottom (heading towards shore) to finish my deco along the bottom so I don't ascend into drunk boaters.

So I guess you'll be taking some Helium up on your next deep broken bow dive?

 

[loosebits]

Well, then you're just doing a multilevel dive and I'd treat it that way.

We typically configure v-planner with a 10 FPM ascent rate and by following the slope, we are able to nail it. Eliminates the need for planning multilevel.

 

[FIXXERVI6]

Well, then you're just doing a multilevel dive and I'd treat it that way.

Its not multi level, its the slope, see loosebits post above, I dont' spend any time hanging out along the slope, but in order to get 30 fpm up the slope I'd have to haul $ss

 

[amascuba]

Agreed but in a lake, that's difficult. I'd rather lenthen by deco oblication then do a mid water ascent from 160 to say 70' in 5' of viz and then have to swim horizontally to the bottom (heading towards shore) to finish my deco along the bottom so I don't ascend into drunk boaters.

Drunk boaters in Lake Travis? Say it ain't soo...

 

[PvilleStang]

Wow, I could be a smart @$$ here and say 80%... but I'll go with the 28% theory. Its a good bottom mix for anything around 130, and it adds a few minutes to your bottom time without pushing the O2 clock too hard. I tend to dive 28% for most of my dives now in drunken lake travis. Drunken boaters are bad, but try the guys who don't speak ingles out at Mansfield who insist on fishing (there's even the sign that says por favor no pesca aqui). Oh, and I almost got my head chopped off by a prop of another group of boaters who refused to speak english. We were at Windy Pt. Public, and coming to the surface, using a buoy cable, since they were supposed to stay 50 feet off, then next thing I know, I hear the prop go over head, and I hit the bottom as fast as I could (considering it was 9 feet deep), and then it went quiet. So we went up and 10 feet away they were sitting right there and then fired it up and floored it through the swim zone!

 

[amascuba]

Wow, I could be a smart @$$ here and say 80%... but I'll go with the 28% theory. Its a good bottom mix for anything around 130, and it adds a few minutes to your bottom time without pushing the O2 clock too hard. I tend to dive 28% for most of my dives now in drunken lake travis. Drunken boaters are bad, but try the guys who don't speak ingles out at Mansfield who insist on fishing (there's even the sign that says por favor no pesca aqui). Oh, and I almost got my head chopped off by a prop of another group of boaters who refused to speak english. We were at Windy Pt. Public, and coming to the surface, using a buoy cable, since they were supposed to stay 50 feet off, then next thing I know, I hear the prop go over head, and I hit the bottom as fast as I could (considering it was 9 feet deep), and then it went quiet. So we went up and 10 feet away they were sitting right there and then fired it up and floored it through the swim zone!

I seriously think that everybody should be required to take a driving test before being allowed to drive a motor operated boat on a body of water. To many people do not know about the basics of safe boating to be on the water. It should be like being able to drive a car.