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Jack, that is interesting, as I bought my bottle in December, and it reads "Made in USA"...

I use "Seal Saver".

Is the same as Germie said also in Germany: one has to do an EFR training to obtain a driver's license, and also for some other things like training and education of minors. Valid for 2 years, and can easily be done and refreshed in a single day.

I would, yes.

I think if at all there will be time variable aspects, but probably not a general trend at "getting better".

Isn't aseptic bone necrosis something basically only observed in sat diving? Given the exceedingly long desaturation half times of everything in the vicinity of the long bones, it would be very hard to understand how these will even notice a 3 minute stop... To my understanding, the safety stop...

But folks as said, this is completely besides the point here. Missing a safety stop on a normal dive carries no measurable additional risk.

Missing a safety stop is NOT "risking your life". Not at all. It is not even proven that it puts you at any additional risk, however small.

Sounds like things that happen in low visibility. For sure no reason to believe an accident happened, but I still would immediately surface after looking around one, two times. In the very least it will sort out the situation quicker...

Not ditching an airplane in the ocean is also priority one. We still get briefed on the vests every single time. So what is your point here? The answer to the question "Do you do a safety stop in case you lost your buddy?" for sure is not "You should never have lost your buddy".

If I brief a group in the role as divemaster, I will explain that in the case of a lost person, we will turn around and look up and down for a minute, then ascend safely within ascend speed limits but without a safety stop. That (mandatory briefing point about the lost buddy procedure) actually...

A safety stop will however not measurably increase your safety. Maybe think about it this way: imagine you see a stopped car on the roadside. Lights flashing, person sitting inside but not moving and not showing any reaction. Maybe just sleeping, but maybe a medical emergency. It is a sunny day...

What would you gain from doing a safety stop?

But then this is a situation where it has been agreed not to ascend at all, so the entire point of stop vs. direct ascend is moot, right?

There is really no solid proof that a safety stop improves safety. It is a recommendation, but any more pressing needs should take precedence. As I would probably not know the reason for loosing the buddy, I could not exclude one of this more pressing problems being the cause. I will thus not do...

Wow!

First, I would simply suggest to do away with the ad hominem. It never helps, Michael. The large veins in your neck transport blood mainly coming from your head, I think this is generally accepted here, right? Any bubbles you detect in them would thus probably have to originate somewhere in...

I think it is very easy to convince oneself that what one is doing is working. Even more so in cases where what we are trying to avert (DCS) is very rare and the border between "healthy" and "minor problem" subjective. It is much much harder to come to a scientific conclusion. Nature however has...

Regarding the vibration: the study targeted the question if vibration before (not after) diving can reduce the bubble load. Bubble load is not identical with the incidence of DCS, even though often even professional societies are good at blurring the lines between both, alas it seems for PR...

Also, his Instagram seems to say that he was *also* diagnosed with an infection of unknown kind. I am simply hesitant to draw conclusions from what at face value seems to be whisper down the lane of a train wreck of a situation...