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Despite the fact that the article may have been written by someone not familiar with diving and its possible hazards, I didn't think he was guilty of neglect. What's puzzling to me is why did he have to make an emergency ascent, unless that meant skipping a safety or deco stop. Skipping a deco...

Electronics is the way to go until.......... Uh-Oh, my battery is dead There are special ToS for posting in this part of the forum Any political comments will be removed and if you wish to rant on political issues please use the "Pub"

What evidence? You cite the NEDU study which purportedly compared deeper stops to shallower stops but those deeper stops did not resemble any profiles divers use today or back when the study was done. Also, in the NEDU study there was no attempt to measure bubble size and their quantity and...

The central idea in bubble models that incorporate deep stops is to keep bubbles below a certain number for a critical bubble radius. The surface tension of bubbles acts to inhibit their growth. As bubbles expand this surface tension goes down and bubbles will tend to grow in size. As they grow...

First. I never said or implied I am avoiding ALL risk. I still solo dive. As to your comment to avoid all risk or seize the day, only a fool would make such a binary choice. Risk assessment and its subsequent mitigation is not an all or nothing affair. Risk assessment requires an honest and...

I don't have transmitters so after setting up my equipment I open the valve and leave it open.

I agree completely that nitrox should be a high priority. You can take a class without the need for dives which is great for divers in northern climes when it's too cold to dive. Also, if you have a chance to do multiple dives a day on consecutive days you'll appreciate the nitrox cert. Nitrox...

I would like to do more solo diving. I am certified and dive with an alternate gas supply. My wife hates the idea of it. I tell her I'm trained and have the right equipment for it explaining that I solo with a redundant gas supply and regs. She says "And do you also have a redundant heart and a...

Read up on ICD (Isobaric Counter Diffusion). That is your proof. My example above describes the situation that allows a possible DCS hit from ICD.

Inert gas will move from higher to lower pressure. Going from a deeper to a shallower depth means that our tissues being at a higher pressure than our lungs at a lower pressure will cause off gassing. That pressure difference is the partial pressure difference of each individual gas and not the...

Since the op mentioned men in her post I'll comment. The fact that women can last longer on a dive, all other things being equal, or surface with more gas is something that I've noticed. I don't think this is due to women having better lungs but smaller ones. Therefore, they have lower gas...

I looked at boulderjohn's response to DogDiver in which the gas was 32/0. The gas in Boulderjohn's quote in your response somehow got changed to 0/32. That's weird. Boulderjohn must have edited his response after you posted but before I responded.

I interpreted boulderjohn's 32/0 just as he explained it: 32% oxygen, 0% helium, and 68% nitrogen. So, why is it hypoxic?

You would need to display the raw ceiling on the main display in order to appease the computer. This change could be incorporated to allow divers to decompress following the ceiling where flashing red alarms for bypassing staged stops would be unnecessary and annoying. However, there might be...

I don't think it matters much in regards to safe off gassing, but you may end up getting locked out of your computer for those using recreational dive computers, when you disregard a scheduled deco stop.

If you need to add or release air from your BCD do it in short bursts and wait a few seconds. There is a delay in the buoyancy change.

I've felt dizzy occasionally when ascending. It lasts only for a few seconds and doesn't happen on all dives. The Chairman is probably right in that it is an imbalance in pressure between the two ears. I've had a reverse squeeze in the past and fortunately it didn't result in a punctured or...

If your computer has a pressure sensor and it is with you (you don't have to wear it) it may not know your current tissue saturation level unless it stores the last levels (which most if not all computers do). It also needs to constantly calculate the tissue pressures and store the results at...

Based on emoreira's and post #22 I would say the point is if you don't care about the warranty or if the warranty has expired go ahead and change the battery yourself. If you do care or you are all thumbs then send the computer in and have a certified technician do it.