DIR- Generic Marked stages filled with lower O2?

[Nick_Radov]

The only folks I see doing this are people practicing for a T1 class.

I think I've seen GUE Rec 3 (now Master Diver) graduates carrying stages marked "70" (ft) or "21" (m) and filled with nitrox 32%. I never took that course myself so I'm not completely clear on how they do it. Is it considered within standards?

Jumping into the Deep End

As you may know, GUE advocates adding helium to your breathing mix when diving beyond 30 m/100 ft. But the recommendation is not just limited to tech divers. Here GUE’s 2019 NextGen scholar and recreational instructor Annika Andresen shares her experience taking GUE’s Rec 3 course, aimed at...

indepthmag.com

Master Diver | GUE

www.gue.com

 

[rjack321]

I think I've seen GUE Rec 3 (now Master Diver) graduates carrying stages marked "70" (ft) or "21" (m) and filled with nitrox 32%. I never took that course myself so I'm not completely clear on how they do it. Is it considered within standards?

Jumping into the Deep End

As you may know, GUE advocates adding helium to your breathing mix when diving beyond 30 m/100 ft. But the recommendation is not just limited to tech divers. Here GUE’s 2019 NextGen scholar and recreational instructor Annika Andresen shares her experience taking GUE’s Rec 3 course, aimed at...

indepthmag.com

Master Diver | GUE

www.gue.com

I hate that class lol.
Yeah I think it's within standards for them but a mess for the rest of us. A mixed Rec3 & T1 charter would be bad news.

I won't allow unmarked or inaccurately marked stages or deco bottles on my boat or as part of a cave project we're working for instance. 70ft needs to be a true 70ft gas, same for the other standardized gases BUT you do run into this same problem with gases like 21/35 and 25/25, and even 30/30 and 35/25 on a cave project since all can have multiple MODS depending on their application. For project dives ,its best to just standardize on expectations and mark them consistently. This issue of gases not being 1:1 with MODs has been a longtime issue for at least 15+ years.

 

[lostsheep]

It is a terrible idea to have mislabeled cylinders; why introduce ANY potential cause for a mistake?

Get yourself some white duct tape and a sharpie if you must ETA: and practice your calligraphy

 

[rjack321]

It is a terrible idea to have mislabeled cylinders; why introduce ANY potential cause for a mistake?

Get yourself some white duct tape and a sharpie if you must.

Your head will explode realizing that "100" can have multiple gases, "120" can be multiple gasses, "150" can have multiple gases. Depending on the boat, cave, or group. There is no 1:1 gas-to-content understanding beyond 20 and 70ft.

 

[lostsheep]

Your head will explode realizing that "100" can have multiple gases, "120" can be multiple gasses, "150" can have multiple gases. Depending on the boat, cave, or group. There is no 1:1 gas-to-content understanding beyond 20 and 70ft.

Nope, my heads intact

Shirley anyone looking towards tech can afford to swap out a couple of mod stickers?

 

[rjack321]

Personally I think it's too easy to go down some sort of rabbit hole where you get into debating if someone can bring an unmarked or mismarked al40 pony bottle rigged as stage into a DIR fill station cause "someone" could mix it up.

In the current 70 bottle not filled with 50% scenario...

• For the cylinder owner, don't go putting 70s on practice bottles
• For the fill station, tape over the 70ft label with a couple pieces of masking tape and then fill it with the requested gas. Ensure it's analyzed like everything else on pickup.
• For the charter trip or cave project, don't go with mixed bottle gases at all. 70 or otherwise. As a general rule you're not going to have a DIR project with various people showing up with various 150 gas expectations so this is mostly a preliminary communication step anyway.

 

[flymolo]

another vote for tape over the permanent mod sticker and write the actual mod on the tape