Nitrox tank labeling

[Goodtime Adventures]

Yep, agreed with most of the others here. I plan and teach 1.4. Diving to 1.6 is not considered unsafe, but the agencies I know teach 1.4 for a planning limit, and 1.6 for contingency purposes. So maybe have a read back through your manual as Oldbear suggested and use the one applicable to you.

 

[Mr Carcharodon]

I did a live aboard last year with mostly Estonian, French and Turkish divers. They all filled the nitriox fill log out to reflect a MOD of 1.6 ATA. In practice they seldom exceeded 1.4 ATA. I can't say the same of the Costa Rican DMs. Anyway Anglo American trained divers use 1.4 ATA mostly but this is not global.

 

[RJP]

1.4 is the current standard for recreational diving ...

And is probably what the shop wants you to use in the EANx log book. Consider that the purpose of logging the MOD - whether in the shop's log or on the tank label - is making sure you understand...
- what mix is in your tank
- how deep you can safely dive it

The number that you write on the tank is immaterial. That label cannot prevent you from exceeding the MOD - either on purpose or accidentally.

If I were your instructor/shop owner, I'd want you to use 1.4. Why? Because if I taught you 1.6, let you log 1.6, and let you leave my shop with a tank of 32% that you logged as having an MOD of 132FSW (32% at 1.6) and then you dove it to 132FSW and you tox-ed... someone would sue me. They would call NWGratefulDiver as an expert witness, and he would testify that...

1.4 is the current standard for recreational diving ...

Now, I mention fear of a lawsuit as the reason for pushing 1.4, but I say that somewhat tongue-in-cheek. The real reason I'd go with 1.4 is that it is empirically safer than 1.6.

 

[Freewillow]

I am using P02 @ 1.6 as MOD for Deco, PO2 @ 1.5 for dive planning and finding the best EANx mix. If the dive is with effort or special, then my planning P02 is 1.4.

 

[C Dub]

My blender puts both on the label:
MOD = depth for 1.4%
COD = depth for 1.6%

Then I test the tank and write in the depths.


(COD = Contingent Operating Depth, I believe)

I always stay shallower than MOD.

 

[TaylorP]

1.4 for bottom mix and 1.6 for deco. I don't know about you guys but, personally, there's no reason for me to push o2 toxicity. You guys talking about 1.7 ~ 2.0 are asking to be put into graves. That's OC, on breather it's different. 1.6 for my hollis explorer and 1.1 with my prism2