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I don't know about depth averaging but I did compare two dives of the same profile. One using the PADI air table and the other using my Dive Excel spreadsheet. The profile was 80 ft / 20 min, ascend to 50 ft / 20 min, ascend to the surface for a 2:35 hour SI. The spreadsheet's profile was...

When I do those dives of light deco that I describe above I'm doing them solo and I always have an alternate gas source.

Maybe. It depends. If it's the first dive of the day I find that practice questionable at best. However, it's very easy to go into deco on the second dive with a minimum SI. For example, occasionally, I'll do a first dive on air swimming at 50 ft for awile, then swim down to 100 ft, and then...

Swimming, which is my aerobic activity. Taking long rides on the golf cart, going to bible studies, programming, and playing bridge (not duplicate).

If we extend the metaphor of manual ("a stick" shift) vs. automatic transmissions to diving with tables we can say that diving with tables is like using a manual transmission with a clutch. The advantage of a manual transmission is that you are in control of the rpm's. If you need maximum power...

So, the general consensus is to get a custom fit suit. I bought a custom fit suit from Ur dry suits. Other than trying it on at the shop to check the fit, its never been worn in the water. My plans changed and I didn't need it. I will give you at least 50% off. If you're interested PM me and I...

This thread reminds me of a story. There were three men discussing the jobs they do. One of the men, a doctor, said he gives order to the nurses and staff, and advises his patients on their options for better health. The second man said he is an executive and the CEO of his own company, and...

The only reason I see to holding your breath is when you run out of gas and you need to swim to your buddy and get their attention to share gas. It would be better to swim closer to your buddy and practice buddy awareness. This awareness includes paying more attention to your buddy and to the...

I was going to post something similar but you beat me to it. Baker didn't want to just make the dive more conservative at surfacing which could be done with just GFHi. He wanted to provide an additional setting (GFLo) in order to adjust the slope of the TC m-value limit throughout the entire...

Yes. Agreed. I googled and read a few of those definitions and none of them provided a concise dictionary definition. My post you refer to was not about providing definitions but providing concise definitions that would fit in a dictionary which some posters were asking for.

Right. There is a gray area between what delineates a recreational and technical dive or diver. For example, a recreational diver doing a dive to 100 ft but stays beyond the NDL and assumes a deco obligation, is she not doing a technical dive? And what about the technical diver who bounces to...

On the accuracy of the results of the code, calculations should be done to a sufficient precision to obtain the required granularity. In cases where temporary results will be used to obtain a future result rounding should never be done on the temporary result but on the final result. This...

I'm not sure exactly but I'll take an educated guess. While the water vapor pressure (WVP) is expressed in absolute pressure terms it becomes a constant that is added to the baseline of the inspired gas pressure adjusted by depth. Since the water vapor is not passed from the lungs into the blood...

The additional risk in some longer swim throughs may not be obvious to the average recreational diver. A few years ago I was diving in Cozumel with a group from the local dive shop. We did a swim through of Devil's throat (not sure if this is the right name) at about 100 ft of depth for about 20...

Not necessarily. If the definition of a tech dive is doing mandatory decompression then some tech dives can be planned casually in the water. Planning is not a requirement only for tech dives; plenty of rec dives are planned predive.

OK. So, what does the phrase mean to you?

I believe that bounce dives below 130 ft can be technical dives only if they result in mandatory deco. However, given the depth limits for recreational diving, some agencies may consider any dive below 130 ft to be a technical dive.

So, it appears that there are many definitions that can describe a technical dive including these: 1. Depth: <130 ft vs. > 130 ft. 2. Environment: open vs. overhead. 3. Gases: air or nitrox vs. trimix or heliox or hydrox. 4. Training: any but not vs. AN/DP, cave, deep wreck penetration, etc. 5...

If Guinness had gone out and told people/organizations to break records than I would agree with you but they're not. They post the records for general knowledge to the public. You are ignoring one other factor: that some of the people that are breaking records are doing so for their own personal...

The most up-to-date version of the spreadsheet is on the web site with all the corrections included above. Use the link above to get it.