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I am terribly sorry to hear about your brother. My sincere condolences. Some unsolicited advice: If you are asking questions to prepare for or make a decision about legal action, I suggest you stop telegraphing your intent here. Get a lawyer instead, preferably a diver or one with plenty of...

Wow. I mean, just wow!

I'd love for ASL to be adopted (no, I'm not deaf, but I'm a hearing signer), but it will never happen. I even know some deaf divers but have yet to dive with any of them. It'd be nearly as good as 2-way comms, which I have also never used (sadly).

So you believe recovery dives entail no risk? Sorry, but I disagree.

There is a myth that if you place a frog in boiling water it will jump out instantly because it's hot, but if you place it in cool water than then boil it, the frog will perish before noticing that it's too hot. It's an urban legend--i.e., a myth, but a useful metaphor in some contexts.

One of my tech instructors had a deck of cards with an emergency printed on each side of every one. He'd show you a card. While you were coping with that "emergency" he'd show you another, and cascade them so you were forced to prioritize, or fail. I don't think he ever stopped with one or...

Heck, all of you saying deep air is no big deal, go right ahead. Do what you want. We won't stop you. Have a great time. I mean that. Just don't expect those of us saying we won't do it to go with you, or for us to be convinced it's OK for everyone. Many of us choose to manage the risks...

I'd add... 1. Call DRIS. Ask about parts availability. They're good at finding and stocking parts for older regs (mine, for instance). 2. Call NESS. Ask the same question, and if you get a second "so sorry" answer, ask about what used regs John has in stock that's used and has parts...

If you expect me to remember the details of a class I took 20 years ago, you're barking up the wrong tree. I'm lucky I can remember what I had for breakfast. I have yet to have a diving accident, even when training for ER or later diving air deeper than *I* ought to. I hope to continue that...

I have zero CCR experience, and at this point in my life and dive career I'm not going to acquire it. If I were 20 years younger, it'd be a no-brainer. Warm air for up to 6 hours? Sure! Warmer is good and much more time to get out of trouble is *really* good. But (a) it would never pay me...

I have the Halo and a Weezle. That is I have a Halo--somewhere--and a Weezle in a well-known spot. When I tried on the BZ400 at a trade show I couldn't move my arms well enough to be sure I could reach my valves if I were wearing it under a dry suit. That made it a no-go for me. Don't get me...

Not for me...it's a long way to VA and MSC delivers! ;-)

https://www.mscdirect.com/product/details/59908640

Nitrox is generally used in shallower water. They could dive EAN23, I suppose, to stay at or under the generally accepted max of 1.4 ATA O2 partial pressure at 165', but the benefits are negligible vs. plain old air, and operationally things are more complex. The gas has to be mixed, analyzed...

Northeast Scuba Supply Dive Right In Scuba

They are both important. You should not exceed the MOD and you should not ignore the O2 clock.

And *this*, right here, is IMO the best reason not to set your computer to air while diving nitrox. I was about to bring this up but you beat me to it. Good on ya.

I have an Extreme and love it. For me it's far better than my Halo 3D. YMMV.

As long as you can physically disconnect the battery, in or out is not terribly important.

I did not suggest otherwise. If you think I did, please show me where.