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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...

The way the physician that was interviewed was quoted...it may be the article, but I would not count it as scientific proof of DCS that a person is treated in a chamber. Not even the symptoms improving may be a real proof, as joint pain from a virus infection will vanish in any case, also while...

I am not a physician, but: isn't the May 16 event before you even went diving? If so, then the root cause also has to be outside diving, no? To me, what you describe happened on this day sounds like what I heard from a friend who had inner ear ischemia. This can result in acute vertigo, and also...

Dan G, as said, I have no personal experience climbing Everest. I do however have every reason to believe that media make it sound much easier than it actually is. It is not a walk, it is not being dragged up by guides. It is still climbing on fixed ropes for hours and days, using your crampons...

This entire case sounds very strange. I suppose the physicians treating him recognised DCS correctly, but I would be very hesitant to draw any conclusions without knowing at the very least the pre-flight surface interval, the dive profiles, and whatever needs to be known about collapsing after...

I am not so sure any comparison is straightforward. I have never climbed mountains anywhere near as high as Everest, but I consider myself an alpinist. What I think is safe to say is that the accepted level of risk and exposure in mountaineering is _far_ higher than in diving. Divers will mostly...

No one will be able to say for sure from a distance. I would however still say the post above mine sounds really overly drastic. I would still immediately call a medical helpline (like Aquamed or DAN), and discuss the situation in detail with them. They will probably have a better shot at...

Why is it 47m, not 42m as it should be?

Not to sound smart, and congratulations to your OWD, but: You probably mean Las Palmas on Gran Canaria, not La Palma (the island), right? La Palma also has really nice dive sites!