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Very nice videos! These really make me miss the place.

I've used these guys- http://www.westernsalesandtesting.com/

This is an awful thing. I believe the Dudas family has been more affected by scuba accidents than any other I'm aware of.

Okay, now I feel shame. For my part, it's true that I'm making an assumption that the warnings against untrained divers entering caves have been communicated widely enough that anyone on Scubaboard at least must have heard it at some point. There's no way to know that, of course. OP, no hate...

Heh- yeah, good thing they only take Advanced Open Water divers, it would be totally irresponsible to take Open Water divers into an overhead unless they're Advanced! Anyone who hasn't done a Drift Diver and Fish ID specialty dive would have no business at all in a cave!!

Yessir, correct. I felt a little bad for not recognizing it as I've been through a fair bit of that personally. In my defense it was only once, and it's been a couple of years. The up & down made an impression at the time for sure, but it really stands out looking at the graph.

That's about the only one that occurred to me that could fit. I've only been there once, and we turned around 8K. The up & down was memorable, but it didn't strike me as being quite that drastic. Awesome dive though.

Okay, the first one I get. That shape, with some scaling applied to depth and time, could be the profile for countless cave dives- including the classic "hope for the best" period of hauling butt over the "shallow" section on the way back out. What the heck is this one though? It looks less...

The protocol begins with training- diving in caves without the training is an absolute no-go. The training and equipment needed to get started is a sizable investment in both money and time, and you need to be a pretty decent diver with some experience under your belt going in to it. Here's a...

That curve is showing a dive to 80M with just under an hour of deco, a little over five minutes of which is spent at the shallow stop. Just a gut reaction with no scientific reasoning to support it, but that seems pretty ballsy to me.

Ban him, or no?

It's how I use them too, but I can't remember the original source of which definition I decided to accept for SAC. RMV is easy, it has a clear definition in the US Navy Dive Manual, and it has "volume" right there in the term. The only book I find offhand that defines SAC though is a TDI...

If you use RMV for dive planning, your surface value is the most sensible number to keep track of. Knowing that, you can convert it for any depth. For example: say your RMV at the surface is .5 cubic feet / minute. If you dive at an average of 33 feet, the ambient pressure is double that of the...

Just a small FYI if you're going to shorten the name & Anglicise it, better make it "Alex" I wouldn't personally be worried about flying after the dive described.

Well damn. I met him once- he didn't know me from Adam, but he was good enough to dive with me at Ginnie for my first go-round on a scooter after class. I never ran into him again but it's always stuck with me what a friendly, nice guy he was. He just came off as a really good human. I know a...

Don't forget Morrison, it's worth taking a look at.

The trick I've seen to find it was done from the surface- tie a weight onto your reel and drop it around where the entrance should be. Once you're over the depression around the entrance it will drop quite a bit deeper than the depth of the surrounding lake bed. Then follow the line down. You...

It's weird and artsy, but the camera shots are amazing and the divers have good technique. Pretty darned cool is what I think.

It never hurts. If you prefer avoiding surface swims to get to a buoy then a compass is handy, especially with the Hilma Hooker. Once you reach a wall, you mostly just need to know your left from your right. I know a compass was invaluable to me when doing night dives at the salt pier, getting...

I was thinking earlier that you might see if you can contact someone on that team for some advice. For something like this, someone might be willing to share the benefit of their experience. For sure it's a serious undertaking you're looking at- if your existing suit poses an obstacle to a...