Yoke vs. DIN for stage bottles

[Meng_Tze]

I'm interested in the dive profile and gas supply required for a 4 deco bottle dive. what is maximum depth and bottom time? Run time? deco gas blends and volumes? Back gas volume and mix? I hope you find the energy and time to reply as I am truly interested. Does he carry all gas on the dive? Quite impressive!

4 bottle deco does not per se mean 4 different gasses. It could be 2 gases but you just need as lot of it. Think of a 300ft dive for 30-40 minutes BT. But 4 deco bottles is a lot in general; sometimes deco bottle and stage bottle are confused/used intertwined. I would also be interested in seeing what this 4 deco dive looks like

 

[bubbleblowindude]

Given the "corrective" tone that the PERRONE FORD post had...I would imagine he would be very careful to present the correct terminology when correcting my post regarding the silliness of using yoke valves on deco bottles. I would be interested in seeing him produce meaningful numbers which would testify to the the validity of the "4 bottle" claim. BTW, 300 feet for 40 minutes should produce the requirement for at least two hours of deco even with the optimum gasses which I would argue may be three. The volume of deco gas would be at least 330 cf and backgas requirements may be up to 390 cf. WITHOUT PROPER RESERVE! That my friend...is a big dive. For anyone who wants to spend the time making the CORRECT calculations...please feel free. I'm making a WAG but I dont think it's too far off. With a 4+ hour run time....once again, i'm impressed!

 

[ArcticDiver]

This is kind of funny --several people (you know who you are) have said something like, "din only, but I have yoke converters just in case..." So, you know, technically, wouldn't that mean you have used yoke?

I mean, once you put a yoke converter on a din valve and slap that baby on a tank with a yoke fitting --that's pretty much a yoke first stage at that point --only it has two failure points.

Just a thought.

Jeff

Well, I'm one of the people who has and prefers DIN and also uses DIN to Yoke adapters. Why?

Very simple: When traveling I don't have the luxury of always having DIN cylinders available. So, it is yoke or don't dive.

There are literally thousands of uneventful dives done each year using both valving systems. So, I can't get passionate about either. But, I do like the simpler DIN.

 

[DeepSeaExplorer]

Well, I'm one of the people who has and prefers DIN and also uses DIN to Yoke adapters. Why?

Very simple: When traveling I don't have the luxury of always having DIN cylinders available. So, it is yoke or don't dive.

There are literally thousands of uneventful dives done each year using both valving systems. So, I can't get passionate about either. But, I do like the simpler DIN.

When I went to Bonaire, I had my recreational DIN regulator converted to Yoke, and then back to DIN after getting home. As a tech diver, in my view, this is the proper way to handle traveling.

It's perfectly acceptable to use Yoke when you HAVE to. But, if someone shows up for a big tech dive on his home turf with Yoke valves, we may have a problem. Not that would refuse to dive with him outright, but it calls into question his committment to technical diving and would cause me to ask more questions and look his setup over more closely before agreeing to dive.

 

[ArcticDiver]

When I went to Bonaire, I had my recreational DIN regulator converted to Yoke, and then back to DIN after getting home. As a tech diver, in my view, this is the proper way to handle traveling.

It's perfectly acceptable to use Yoke when you HAVE to. But, if someone shows up for a big tech dive on his home turf with Yoke valves, we may have a problem. Not that would refuse to dive with him outright, but it calls into question his committment to technical diving and would cause me to ask more questions and look his setup over more closely before agreeing to dive.

I'm glad you said "...in my view..." because there are a variety of opinions and reasons, substantial and fanciful that apply.

As for someone showing up for a "...big tech dive..." with what is considered to be wrong equipment I think there is a much more fundamental question: Why would anyone do a "big tech dive" with a stranger?

I have been taught, and my experience reinforces, that it is not safe to dive with strangers in difficult or "advanced" dives. For what would be considered a big tech dive, since no one is a stranger, all equipment and skill issues have been resolved in previous dives. If they have not been resolved the team isn't ready to do the dive yet; period.

 

[Meng_Tze]

you make some valid points.

 

[PerroneFord]

Best take this private...

 

[Rick Inman]

Best take this private...

Can we at least go out to the parking lot and watch?

 

[PerroneFord]

LOL! That's bad man.

 

[daniel f aleman]

As said above, any tech diver that sees the use of yoke as a problem in tech diving, is not a truely experienced tech diver. We used yoke back in the 1980's exclusively (and for much of the 1990's), I made hundreds of "tech" dives with no yoke first stage problems.