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The way I read it DD didn't lose situational awareness. He chose to exceed his NDL in order to attempt his task, knowing that it would be a very minor deco requirement that would either clear during a normal ascent or with a very brief stop. Even if it was the result of losing situational...

"Instructor trainer"? Just to be clear, you mean it wasn't "just" an instructor who told you that. It was somebody who trains instructors? That gives me enormous confidence in the system.

The way I read that you think that the water in your wing was contributing to whatever buoyancy issues you were having. Water is neutrally buoyant, so even if you had a gallon of water in the bladder it wouldn't change your buoyancy, because it simply displaces a gallon of water that's not in...

I'm not a fluid dynamacist, but wouldn't two gases at equal temperature and pressure but composed of molecules with different weights actually be fluids of different densities? Or was that just some subtle humor? If gases can become stratified can I safely presume that there's a boundary? If so...

Pressure is just the average of the force being applied by lots and lots of atoms or molecules slamming against something. In perfectly "still" air the molecules (the O2 and N2 are diatomic, which is why we refer to O2 instead of just O) are still moving quite fast at any temperature you're...

Of course you don't need to have deep water to have problems, but the Ashokan has a maximum depth of 180' according to the NY Department of Conservation. At about 100 years old there may still be standing trees on the bottom, and I'm pretty sure that the various buildings that were in the...

I'd say the relevant difference is that while Tina Watson's skills weren't properly evaluated she was a certified diver who represented herself as being capable of conducting her own dive as part of a buddy team, and there were no allegations that the dive op provided unsuitable gear. That's...

Didn't we cover that one thoroughly within the past couple of months? When somebody uses that particular case to make a point it's almost always a dead giveaway that they're not smart enough to actually learn the details first.

The article clearly says that Burns "indicated he was out of air"; there's nothing confirming that he actually was OOA. The article also says it was the doctor, not the dead dentist who did two uneventful dives, and that's clearly not an accurate description of events. It may be possible that a...

This place, which has one of the most famous tidal rapids in the world, also disagrees, in a very forceful manner: Clearly, whether you're there to dive, surf, or see the spectacle, it's a good idea to check the tide forecast. As noted above, there are other places where the tide has little or...

A siphon or sump is simply the term for any portion of a passage in an otherwise "dry" cave that is below the surface of the water. It has nothing to do with what direction the water is flowing, though sumps are probably encountered more often from upstream than from downstream. The only...

If your policy doesn't cover diving at all you don't have a great policy. I wouldn't have any quarrel with a policy that excluded coverage or required a premium increase for technical diving, but the risk of a payout due to a death while engaging in recreational diving is vanishingly small...

We don't need judges and juries to figure out the truth when we already know what it is. From what I've read about the incident it seems fairly certain that the truth is already known, and the problem was with Skiles, not the equipment. The nature of our civil justice system is such that what...

Or perhaps a shortage of testosterone or some other male characteristic.

I can't believe he stitched it up without a needle and sutures. I know he didn't have them, because the article doesn't say he did.

That's certainly true, but I'm fairly sure that when somebody dies in a situation like this the authorities get involved and it becomes much more than a simple matter of somebody's own mishaps or failures. If the authorities do become involved there's an official record of the incident, and at...

All I know about the incident is from what's in this thread, and it doesn't offer very much information. It's possible that they were doing an introductory dive known as a "resort course" or Discover Scuba Diving. After some brief classwork and skills practice participants do a brief dive with...

I'm not trying to be nasty, but my assessment is that you're thoroughly clueless and out of touch with reality. We could argue about the meaning of "average", and it's possible that the 120' (maybe it's supposed to be 130', which fits the standard recreational limit and conforms closely to the...

I recognize a couple of the cases listed above as a result of being a whitewater kayaker, and therefore having an interest in legal issues about the public right of navigation, and I looked at a couple of the cases I don't recognize. I didn't look at all of them, and all that I looked at are...

I thought everybody knew that sharks are terrified of dogs.