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So, the technical way is with a secchi disk as mentioned up thread. A more practical measurement for divers in limited visibility is the distance at which you can resolve your buddies communications. In gin-clear water in a Mexican cave or in the crack at Silfra the visibility is essentially...

Doesn't matter. The average bog standard person neither knows nor cares what the difference is. Y'all are proving my point for me. Everyone is rushing to talk about how it doesn't mean this or it doesn't mean that and it was co-opted by people and used for evil. Huh....kinda like the ok...

What lessons did you learn? I can point out several significant things but I'm curious what your takeaways are.

Do you have any idea how hard you would have to impact a cave in order to damage an isolator to the point of failure? I've seen doubles fall off the tail gate of a pickup truck and smash isolator first into the ground, not damage. Chances are if you hit the cave that hard you've knocked yourself...

More pearl clutching. Guess what, Google Maps is covered in swastikas in certain parts of the world.

:vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit::vomit: Gross stingy eye water? Do you have...

Yes, absolutely. I would probably be a little more conservative with a radial scrubber since the bed depth is shorter.

I love seeing people with nothing but a 40 of air, it's like watching Darwin at work!

Basically this ^^^^^^. 5.5# in the SF2 and 7# in my Pelagian. I had the 8# radial in my Meg before I sold it, but never stretched its legs that much. If it's anything deep, it gets a new scrubber. Sorb is cheap, funerals are expensive. I tend to estimate 1lb/hr as a conservative baseline...

It's just norprene tubing. Nothing fancy.

Lots of people use AV1 stuff to replace obsolete electronics, Inspo heads, etc. I hear good things about Alexey and his gear, I just don't have a need for it. The fischer-only HUD is pretty slick. You can add a HUD to anything that has a fischer cable, which is pretty snazzy if you're in to...

I'm still trying to figure out if he only comes on SB when he's drunk, if he's been punched in the face by one too many kangaroos, or if he actually thinks he's putting together coherent sentences, but I sure as hell can only decipher about 5% of his posts. That 5% generally has reasonable...

It's relevant because it's just as pointless as using cuft as a basis of measurement. A cuft rating means nothing without pressure, so you have to do math anyway to actually figure out how much breathable volume you have so you might as well do it the easy way, and the one that translates across...

Didn't see this posted anywhere here. A friend e-mailed me this pdf. today. Any legal people wanna take a gander and throw out an opinion?

I think one of the biggest issues in this discussion is exactly what @Wookie and @cerich have stated several times, words have very specific meanings in the maritime world, very concrete definitions that aren't up for interpretation. Trying to apply logic to them with a false perspective, while...

Many? Maybe a handful. There are plenty of other things that kill divers far more reliably than an isolator. Swapping regs underwater is sketchy at best. So is hot lipping a valve. I can do both, in sterile training environments. I really doubt that anyone's success in performing either is...

Rebreathers are effort. Effort is life. Life is pain. Rebreathers are pain. Personally I'd chalk it up as a lesson in not using indicating sorb and just deal with the slight flair of fabulousness until it eventually fades away. Unless you dive a P2 in which case I'd want to hide my shame too...

Really? How much gas does an AL80 hold? The idea that calculating tank volume in metric is problematic is silly considering calculating in imperial is just as problematic. An HP100 is only 100 if you can get it filled to its service pressure. A 10L tank's capacity is whatever it is based on...

I was trying to keep it simple for the OP. He's having some trouble understanding apparently, I figured it would be easier this way.

An LP85 will hold 85cuft of gas at 2640 psi. At 2400 psi it will hold roughly 77cuft of gas. At 3600 it will hold roughly 115cuft of gas. Your latest hydro says you can only fill your tanks to 2400 psi (no + rating). If they are actually LP85's as you have suggested, they will hold 77cuft of...