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Meh. If I was a local, I really wouldn’t have a problem meeting up with some people to take them through the mine on my own schedule when I wanted. I mean, I do the same kind of things at my local river. I’ve never charged someone to dive with me… And I’ve done plenty of dives that I didn’t...

Understandable, and works for me. Those are some decent dives! 40-50 minutes runtime is plenty, and I’m going to guess that last one might have been shorter because of depth? The Nitrox will not go to waste — in fact, it makes me want my doubles. Interesting, and good to know. Given they...

Was Dive 1 an actual go-somewhere dive in *addition* to the checks? For $90, I hope so… I certainly get the desire to make sure people are at least minimally capable. I just don’t want to pay full price for it. :( I’m glad you mentioned this: I was not planning on bringing my lights at all...

No problem. Spoiler alert: the news is bad. :-) Notice that the tanks are stamped DOT – 6498. That number is the special permit (used to be called exemption) that those tanks were manufactured under. A quick google shows that they were made by Luxfer. Luxfer made tanks for most all of the...

OK, you got a tremendous LOL from me on that one. :-) That reminds me of the old joke about GUE divers. If you see a group of divers on a dive boat with GUE hats and T-shirts, they can’t actually be GUE divers, because”real” GUE divers only do skills dives in quarries, not actual dives… :-)...

Well… Seeing as PADI does not offer such a specialty, how would the average diver get one, and therefore how would the average dive shop be able to require one? Besides: it’s highly unlikely that an “average dive shop“ has a set of doubles to rent you in the first place. Doubles are not rocket...

That’s the funny thing about rivers, at least our river. We have every bit the same circumstances as you’re describing. Unrelenting current, rocky bottom, and if you grab onto something it’s just likely to come with you as stop you. (After all, in the end, it’s actually the same river as...

Hey, that’s my river! :-) I live an hour from that dive. Through the summer, I probably do it 30 times? It’s by far my favorite local dive that doesn’t require getting on a boat. And other than paying for fuel and breathing gas, it’s free! :-) It is a very challenging dive. I do not recommend...

I think OP’s numbers are reasonable. Regulator servicing has gotten expensive. Here’s a quick example from a well respected company: Service for Regulators In short, $245 total, parts and labor, for one first stage and two second stages. DRIS might be slightly cheaper, depending on parts...

That is the last model of the old style dry air bleed design. It should use a piston that has a separate module screwed into it with a laser drilled hole and a plastic filter. It’s the most capable and reliable of that design: it can actually be cleaned without clogging and replaced if...

Zero. The sensors aren’t capable of delivering that level of accuracy, so that level of precision is meaningless. Besides, because of that lack of accuracy, the sensors won’t actually alarm until they detect at least 3 or so parts per million. If it’s 3.0 or 3.1 or 3.2, are you willing to...

According to this, two AL40 weighs 30 pounds, basically the same as a single HP100. So it’s a wash: your config and double HP100 weigh the same. But seeing as you’ve said you don’t need the extra gas, use double LP50 or LP72 and save as much as 20 pounds… And wearing a set of LP50 doubles is...

Yes, the device you are describing is very much not the one that I covered in my review. Unfortunately, it seems the Amazon link I included is now mangled, so I included an update with a link back to the manufacturer website, as well as a screenshot of the device so that people can be clear...

Something triggered my review of this post and I see that my Amazon link is gone. That makes it difficult to know which one I’m talking about, seeing as Forensic Detectors now makes at least two, one of which is supposed to be more optimized for scuba applications – but is double the cost! Here...

All of that information is outlined earlier in this thread. It always pays to read the entire thread. :-) TL; DR: Faber didn’t actually perform the hot dip process, and the supplier who did is shutting down. Same reason why PST quit making them as well: it’s the opposite of a ecologically...

That’s me! That’s me! :) I’m very much looking forward to fleshing out those kind of numbers myself. As part of the class of course I did a 1000 foot swim towing the scooter, so I have a usable number for gas planning, but I’m really looking forward to getting a better understanding of all of...

I’ll leave in a couple days, and I thought I would bump this one more time just in case anyone was interested. Happy to deliver between Detroit and Gainesville next week!

Most of my time is filled, but the final weekend is open. That’s December 6 and 7. Anyone up for some cave diving that weekend?

I may have missed the fact that people were talking about hoses for use with pure oxygen. If so, I apologize: I was coming at it from a breathing gas perspective. Pure oxygen brings about a whole raft of additional issues. I do not have enough proper training or experience to feel comfortable...

I echo what @Tracy said: Parker 527BA is their Breathing Air (hence BA…) hose. If you want the exact right tool for the job, that’s it. Parker 520N is Parker‘s version of SAE 100/R8. I have seen both the Parker version and other brands used fairly extensively in scuba and SCBA applications...