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There's a whole world of stuff out there built around the concept of open source software. Some examples that stand out off the top of my head might be LibreOffice, which is a fully working word processor/spreadsheet/presentation/etc. office suite, the Apache web server which powers the great...

Ok, got me there. Until you inhale again then, I guess the lungs are indeed smaller ;)

Uhh... no.

It's definitely a lot more relaxing to watch a video when it doesn't seem like the instructor himself is going through a continuous near-death experience...

Carl is an excellent instructor, I did cavern through full cave with him. We were able to do some skills and academics in Houston. Be aware though that for the actual overhead dives you won't be able to do these in Texas, you'll have to travel. There are no training caves at all in the state...

You'd need to see the place to appreciate it, but locking that place off would take one heck of a lock, and one heck of a locksmith to put it on--

My Petrel had a couple of quirks that were knocked out in short order. I was an early adopter so I suspect this was going on at a pretty busy time for them. I was very satisfied with the turnaround, and since then I've put a couple hundred dives on it, some with some pretty rough treatment. It...

Yep, google and wikipedia are to the rescue on this. There is a nice summary with references: Oxygen toxicity - Wikipedia

Pulmonary is a form of toxicity, as well as CNS. I imagine the OP most likely isn't doing that much deco yet :)

One "special property" of 100% O2 vs others is that you offgass equally quickly regardless of your depth. So once you switch, your deco time will be the same whether you do all remaining time at 20ft vs moving up to the 10ft stop once cleared to do so. The theoretical advantage there is that if...

There's a well-known "secret" to getting through the gallery. I imagine your instructor has told you, but it took me a few times to figure it out even after I'd been told-- hint: use your eyes! That trick will save you a ton of gas and can make the difference between being exhausted by the time...

I second that. This is Jerry Ligon that teaches this course, and it is excellent. **Edit: I'm very sorry to see it, but I just looked Mr. Ligon up on Facebook and it looks like he has passed away. This is sad news indeed, he was obviously very knowledgeable and enjoyed sharing his passion with...

Awesome indeed- the dedication and care it takes to see something like this through to the beginning is a little amazing. Big applause Donna!

Really good videos- I enjoyed this one and the one showing your cave training very much. You do a great job communicating the experience of the dive and excitement of the training, and your emphasis on being careful and delicate with the environment is much appreciated. The photography is...

That's one of the most awesome ideas I've heard in a long time. I keep having hopes when some new dive-related show comes to TV or the big screen, but it always ends up as a disappointment as they strain to inject drama... the "oooh, scary dive stuff!" stuff just comes off cheesy and...

I'm so sorry to hear this. I've only known her through her writings here and stories passed along by friends, but I've read her thoughts for years and she has always seemed like an extremely kind, gracious, and thoughtful person. I'm very sorry for your loss Peter.

Different agency...

Sold--

For sale is a pair of Faber Blue Steel FX120 SCUBA tanks, rated for 3442 psi. 7" diameter, fits same cam band strap as standard aluminum tank, holds 1½ times as much gas. 200 bar valves-- these are the most versatile and can be used with any regulator: standard Yoke style, 200 Bar or 300...

My body: say it's ~1lb negative Aluminum backplate: ~2lb negative Steel 120, full: ~9lb negative The human head: I prefer every bit of this to be out of the water, which means it's not displacing any water, so the whole weight pushes down, ~10lb The head being out of the water also means some of...