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Stop being a dick. It's a trivial matter nor related to the subject of the thread. You were wrong. She was right. Move on and shutup.

Crazy thing is that one of the fills was from a very big commercial outfit that fills dozens of T cylinders every day and they fill by weight. Should be fool proof, right? Apparently not. Here in Canada mixing N2 and O2 to get air is specifically not allowed in the standards. Some places think...

I know of at least 2 examples where a commercial outfit was selling a 21% O2/N2 mix by combining O2 and N2 and selling it as air where the end user either passed out or died. Relatively recently. Edit- Both were hypoxic. One of the mixes was 100% nitrogen. The other was something like 5% O2.

Grade D is a garbage spec. I can meet that with my bicycle pump.

I used to work at a lab that did air testing for fire departments, oil field safety companies, scuba shops, etc. The only difference in standards (in Canada) was that scuba air could only have 3 ppm of CO present. Everyone else was allowed 5ppm. That 2ppm difference isn't going to make a...

If it's being used for breathing air and has been certified as such then it is of "Scuba quality" . Doesn't matter where it comes from. Airgas shouldn't be a problem.

What advancements? They are basically the same now as they were 10 years ago. 20 years ago.+. Same method of monitoring, same principles. Of course the incident rates haven't declined. It's the same technology just in different packages.

You really are a choice piece of work. It is not an option. Deep air is stupid. I did it. I realized it was stupid. So I stopped. Now I have little patience for those that preach to others that it is an option and I will, with extreme prejudice, pound down you and who ever else shows up saying...

No. We get all bent out of shape when people advocate for others to do stupid shift. Like deep air. You can do whatever fills your boots. I really don't give a f. It's when someone asks the best way to go deeper and the joe boys say that deep air is an option that I get concerned.

For farks sakes. There are 21 pages here with multiple instances of numpties advocating that the OP does deep air. And you were the first to jump in on it on post 2 or 3. And clean up your back yard.

I have zero respect for those that dive stupid crap and then advocate its' use to new divers.

Please show some respect for those who came after you and have learned enough to not do stupid ship like deep air so that they increase their chances of not passing away.

The usage depends on where you are. Some places for technical dives, the DSMB is used to let the boat know where you are if you happen to go off the shot line (red/orange one), or in emergencies, to let the boat know to come over and send down the drop set because more breathing gas is needed...

I seriously doubt DD would let you dive OC in Bikini.

I've been to Bikini twice. You absolutely do not want to do it on OC. Or deep air. If you aren't able to get some sort of CCR trimix ticket before then, don't go. Re-book. Don't be "That OC Guy That Effs up the Whole Trip for Everyone".

An Irish diver asking for permission to work a wreck. Now I know you are making stuff up. I just spent 2 weeks diving in Ireland diving with Irish divers. We did many wrecks including 3 subs (2 Deadlight, 1 operational) and they never asked for permission from anyone for anything.

A "lot of them"??? Now you're just making sphitp up.

Except for the numpties that day was 15-20 years ago.

Yellow if I need a dropset. Red just for a location marker.

And air at 150-200 is incident free/safe? Assinine.