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Sad day in Jackson County... the victim was well-known and well-liked. RIP

What he said. I was gonna ask you who is "shop guy." Because working in a shop does not qualify anyone to make blanket statements based on dodgy data and push it as fact or advice. Certainly, mass has inertia and moving inertia in water takes work... more mass = more work and ****...

Something to also consider is that commercial diving might more truthfully be described as underwater construction work. The career ups and downs have been dutifully explained above, but you should also consider that diving (that's to say the underwater experience underwater you've accrued to...

A reasonably common issue especially when switching from SM to BM regardless of size (within reason). I have similar issues myself since SM has become my default configuration over the past several years. Fitting tanks to the task at hand (smaller, lighter is easier to control given the dive's...

That is quite the shady bunch... no doubts in that regard; however, and also without doubt, Roger and Jon, Kelvin and Natalie are all talented and highly skilled instructors.

I have an Analox, but the Divesoft is superior in my opinion and brief experience. Good luck with the project!

You're asking for advice... so here it is. If you're not interested in teaching, then DM is a total waste of your time and money. If you have "winter doldrums" then use the money you seem prepared to invest in DM training to travel someplace and dive. You seem to have written off doing...

You're welcome. Whereabouts are you going to dive? Wherever have fun and good diving!

David: You're asking for opinions, and here's mine. A steel 18L is a huge mother of a thing to manage... speaking for me, an experienced diver. It's difficult to trim (I'm 180 cm). More important perhaps, are you calculations for weighting. Are you considering the mass of the gas and the...

Rinse your face with cold water, dry well, pop on the helmet.

HAHAHA. I travel and dive extensively in the Yucatan and always carry Pesos. First off, I'm not a yank and therefore don't carry US money; but more importantly, believe it's more gracious to speak Spanish and use the local currency, which is what prices are posted in (for the most part)...

Ah, apologies. After rereading your original post, I see you are Extended Range certified. As for your question regarding frequency of deco dives, that's a difficult question for me to answer in a meaningful way. The majority of dives these days are cave dives as opposed to deep wreck dives, so...

@KentB: good advice from an experienced practitioner. The advice to stick to one gas is really worth thinking about. Introducing a second decompression gas at this point in your diving is not only unnecessary (unless you are diving well beyond your certification/experience/comprehension level)...

Sandy: I can't make it since I am still banished from the US; however, I will be there in spirit. Rich was a delight to spend time with. I could never understand his love of Arsenal Football Club, but he made up for that flaw in so many other ways. Plenty of memories but a lasting one is a...

Thanks for the correction... I'm blaming lack of coffee. However, let's hope our little discussion raises the OP's curiosity and level of alarm! LOL!

Blending by molar mass... hydrogen is approximately 2.014 grams per mole while for oxygen it's approximately 15.9994.

Oh, dear... Sad news indeed. RIP Rich. I'll have a beer for you tonight old buddy!

Sad news indeed. Condolences to his family and many, many friends

Similar skill set applied in a very different environment and therefore different protocols/different courses/different standards

I don't get to Scubaboard much anymore. This thread is one among many I missed. However, glad I found it. Skimming through it one learns a little about a lot of people. You're a good bunch. @Superlyte27 I don't have words, mate. Burying friends is hard, burying a kid must be a hundred times...