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The owner of a dive shop I worked at many years ago called the AOW course "Pay me to take you diving". He loved when people would sign up. Big bucks, no whammies.

None.

i thought that European tanks didn't have burst disks?

Get a decent compressor and maintenance is minimal. Filters. Maybe oil once in a while, depending on how conservative you want to be regarding hours between oil changes. I've heard anywhere from 50 hours to 500 hours (from a compressor tech I worked with).

2 x 150-200' dives per day is pretty standard in the Great Lakes and Bikini. Bikini was 2 hour-ish run times. 4 hour surface interval is mandatory with Dirty Dozen on their Bikini and Truk trips. I think we did 90 minute run times (because of the cold) with 90 minute surface intervals in the...

The sorb or the wife?

So George was wrong? They may not be designed to rotate but they can, to a certain extent without failure, as I found out many years ago when I impacted a ceiling in a wreck while scootering. I dive OC doubles maybe once or twice a year. If the current thinking is to lock them, then I will go...

I'm in the camp that the more time you can spend on tech OC, the better your CCR skills will be. Unfortunately the cost of helium makes it prohibitively expensive to get those OC hours in with trimix. OC dives that involve deco don't necessarily need to be trimix dives. So don't jump to CCR...

They don't. You are doing a 45 minute deco stop.

I was on sertraline (Zoloft) which is also an SSRI, for a few years while still doing deep technical dives with continuous PO2s of 1.3 to 1.6. No problems for me. I suppose that is only a data point but it's a positive data point. There is no way any doc or DAN will say that what you want...

I do the prebreathe for about 3-5 minutes. To get the scrubber working, especially in cold weather, and as a final check to make sure my solenoids are working and O2 is on.

Thats is just so messed up. When I have to use Balloon grade I always analyze it first (I know a lab that does it for me for free). But I always trusted anything above Balloon grade. Looks like I better start checking every single T I get.

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...