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For the record, our experience with him as our teacher was he was excellent, we learned much more than we expected. It was an incredibly productive use of time and money. Please don't put too much into the opinions of a few people in this thread.

Sure! We were already deco divers. They can also teach all the way from Intro to Tech, but I'm not sure we would have done that well not having time to practice before beginning the course. Your level of certification will determine which wrecks you can dive legally.

The SMB launching technique was a new one we had only learned a couple days before, so you are seeing some task overloading, but I wouldn't read so much into it. We all launched SMBs neutrally buoyant (and higher in the water column) the day before this dive took place, and we will launch them...

Maybe someone can chime in with research, dive fatality reports, or even anecdotal experiences with regard to this? I don't actually know of a story where in a few moments someone died breathing the wrong gas, but I would love to learn about them. Ironically the TDI site, in explaining how...

Because we were a team of three we just emailed him and were able to schedule at our convenience. Maybe there's a way to get a group of people together on the board?

I'm not really qualified to have any opinion. All I would say is it's worth considering the difference between theoretical what-ifs, and the actual things which have killed people doing technical dives. We all know that breathing the wrong gas kills people, but what actually leads to that...

Just to clarify, in the class we spent a good amount of time doing line work. We laid a line between points on the RSB-1, and followed an intentionally-clumsily laid line many times through a pretty complex passage on the Captain Dan, first normally, then with a blackout mask. That said, it's...

I don't personally know about the propaganda, we first heard of Chatterton listening to Shadow Divers on our drives to Monterey, and then learned a lot more from his website. I would say it was much better than we expected. The ways of rigging spools and reels, SMB technique (despite our...

We're students. We will make mistakes. In ten dives we will be better, and in a hundred we'll be better than that. If you're curious, I have a list of 34 things we are working to improve based on this dive alone: Hydro Notes. We're pretty aware of what needs to be improved, we just need you to...

Two buddies and myself recently completed John Chatterton's Advanced Wreck diving course in Florida. As the final dive of that trip we descended to 165' on the wreck of the Hydro Atlantic. We penetrated the wreck in a couple places and ultimately made an ascent with decompression stops. Why is...

You need an air spool: DGX Air Spool w/ Viton O-Rings for SPG Swivel

You dive out of Bamboo Reef in SF. Walk into the shop, tell them you want to cave dive, ask for Lexi or Sean. They both dive the cenotes every year and can answer all your questions, teach you sidemount, etc.