Rec Trimix

[do it easy]

It's not even the old school profiles either. You can take the lastest version of you favorite software, or use whatever table you find on the net. Maybe you could shave some time off, maybe you can't. I'm curious to see how much shorter the deco can get, but I'm not dying to find out.

 

[dherbman]

i agree.
theres alot to itsoon

There is a lot to it and it's difficult enough to sort out without having to guess what the issues and positions are. You've posted a lot in this thread and it seems you've got something to say, but all I'm getting is that it comes down to cost for you. Is that all it is for you?

I did an anchor replacement last winter on a floating crapper.
0 vis, 38 degrees, 80' square profile on air. Follow the cable down to 80', through the silt, over the stump, under the log and through a mess of other older anchor cables abandoned over the years. Pretty simple, except it was a mind **** for me. Any room for He on that?

 

[Diesel298]

well lets do a little experement
everyone.. use you best judgement in best mix and use whatever you want. tables....or a program.... and post up and lets compre profiles....
say 20 minn at 210 FSW
have at it
post up what ya get and what program or whos tables you used...
lets get something constructive outa this post?

 

[*Floater*]

The whole point is that you can't just reference a study referenced by someone else on the internet. If you are going to introduce the study as evidence to make point, then the entire study must be produced. It would be even better if the study was independently duplicated.

I did not claim anything unlike you. You specifically made the claim that helium on-gases faster. This was contradictory to something I had read so I asked you whether you were sure about it. Do you know of any studies that prove your claim or are you just repeating some theory that you were perhaps taught as fact?

I also provided a link to the post I was referencing and asked for more information on it. The point was not to provide evidence for some imaginery claim that you thought I had made but rather to request that you to provide evidence for your claim and also to request more information on an alternative theory from anyone who might know. (If anyone has a writeup of the study then please pm me.) That should be fair enough on these forums.

 

[Diesel298]

There is a lot to it and it's difficult enough to sort out without having to guess what the issues and positions are. You've posted a lot in this thread and it seems you've got something to say, but all I'm getting is that it comes down to cost for you. Is that all it is for you?

I did an anchor replacement last winter on a floating crapper.
0 vis, 38 degrees, 80' square profile on air. Follow the cable down to 80', through the silt, over the stump, under the log and through a mess of other older anchor cables abandoned over the years. Pretty simple, except it was a mind **** for me. Any room for He on that?

no its not all bout $$ but thats a big player in there....
and i didnt say there wasnt a case where it might be needed.
you dive what you wanna dive.....
ive been deep and in no viz.... weather it be working, setting the hook on a wreck or just diving for me..... you wanna dive a 35 fsw END have at it....
i was just starting to settle down a bit on this topic..
but i just got my second wind

 

[Diesel298]

I did not claim anything unlike you. You specifically made the claim that helium on-gases faster. This was contradictory to something I had read so I asked you whether you were sure about it. Do you know of any studies that prove your claim or are you just repeating some theory that you were perhaps taught as fact?

I also provided a link to the post I was referencing and asked for more information on it. The point was not to provide evidence for some imaginery claim that you thought I had made but rather to request that you to provide evidence for your claim and also to request more information on an alternative theory from anyone who might know. (If anyone has a writeup of the study then please pm me.) That should be fair enough on these forums.

ok..
let me think here...........
dang this hurts...
if it ongases faster. .. and therefore offgases faster. than one COULD hold a arguement to shorter decompression... NO? mabye your both on the same page just not the same paragraph?

 

[dherbman]

no its not all bout $$ but thats a big player in there....
and i didnt say there wasnt a case where it might be needed.
you dive what you wanna dive.....
ive been deep and in no viz.... weather it be working, setting the hook on a wreck or just diving for me..... you wanna dive a 35 fsw END have at it....
i was just starting to settle down a bit on this topic..
but i just got my second wind

I'm not here to debate or spew, I'm here to learn. Watcha got? I know there's a lot more behind your posts than a set of hairy balls, but that's all I'm seeing. What's wrong with a 35 fsw END?

 

[do it easy]

Yeah, I'm cheap. I think that standard gasses are too rich ($$$) for some dives. For the other dives, standard gasses have their place. Regardless, my buddies and I dive the same gas and profiles, although these might change depending on the dive.

 

[TheRedHead]

That's silly floater. Check out the TDI Trimix textbook. NOAA:

Using heliox or tri-mix alleviates this problem by reducing the amount of nitrogen in a breathing media. Below 200 msw, divers using heliox begin to experience high-pressure nervous syndrome (HPNS). By mixing some nitrogen back into the breathing gas (often about 5%) this syndrome is eliminated. Decompression stresses are shifted due to the decrease in nitrogen, and the increase in helium, but it is important to remember that the use of helium is to reduce narcosis, not to reduce decompression requirements. Depending on the dive profile, tri-mix may actually extend decompression stop requirements beyond the amount of time required on a similar air dive. However, the decreased narcosis makes dives safer and more productive.

I don't have time to look up more references, but I'm sure you can find them. It may be true that ONGASSING of helium occurs at the same rate as nitrogen as GUE believes, but there are many other agencies that believe it does not.

It is still a pissing match. No one knows. And it's my bedtime.

 

[Diesel298]

I'm not here to debate or spew, I'm here to learn. Watcha got? I know there's a lot more behind your posts than a set of hairy balls, but that's all I'm seeing. What's wrong with a 35 fsw END?

its a way crazy lame overpriced overkill....
with proper traing you dont need a end of 35 fsw...
im gonna step outside the box for a second for a example...
rebreather divers getting trained on mix are advised to use a mix to provide a END of 100 FSW. thats for a rebreather diver with all the crap they gotta deal with.
are you saying a open circut diver needs less than that...
if you have a high task loaded situation where you feel better with a 30/30 mix fine but the large amount of people diving it at shallow depths. and whole certs training for it..
its just c card collecting for the most part...
if its that critical to dive a He. based mix at 100 or less mabe padi and naui shoud run with it and start treaching it at a lower lever...
because the sport at complex as mixed gas diving should be dumbed up as much as possable.......
as far as my harry balls, sorry sometimes i get off on a rant. nothing is pointed at anyonne....