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There are a lot of good wrecks off the east coast of Florida (Pompano, Boca, etc.) and it's often easier and cheaper to get there. You can probably find a good SDI/TDI instructor, too.

First, most every dive op and liveaboard has you do a check-out / weight check dive. And there's no shame in asking for a weight-check in the middle of the week, too. I'm a math nerd, also, and early on I tried to calculate my exact buoyancy for different gear set-ups. Eventually I went the...

The process shown at ca. 4:40 in the video is exactly the way we were shown how to stow the reef hooks the boat gave us in the Maldives. It takes a few seconds of "weaving" to make a very compact unit, unwinds quickly when needed, and with a bit of practice can be done without looking after you...

I dove with LivingTheDream for 2 days on the West Side before heading to Compass Point on the East for another week. LTD was great - friendly and professional.

What you think of the swim back in on the front porch depends on what you're looking for... there are lots of smaller fish and critters inches from your nose, if you look. And here's a pic of an octopus that we found at the end of a night-dive - right under the second pier/platform. (Sorry for...

Thanks for sharing that fantastic video. Of course the hammerheads were great, but the clear video of that huge swarm of White Tip Reef sharks was super cool.

I'm visiting a friend in Pacific Grove next week. We regularly dive together in the Caribbean, but haven't done cold water in years and he hasn't been diving there since he moved to PC a few years ago. I could bring my regulator, lights, mask, and Perdix easily, but don't own a wetsuit that's...

I thought he meant if a tank started with air (21%) and they topped it repeatedly with 32% (over several dives), the pO2 would increase, eventually reaching 32%.

Congratulations and welcome to the wonderful world of SCUBA! I'm sure someone mentioned this earlier, but if you haven't seen this forum, you might want to check it out: https://scubaboard.com/community/forums/divers-with-disabilities.346/

CO is easy to detect with IR. CO2 also. N2, H2, O2 and He do not absorb in the IR and will show zero signal. Nada. I'm happy to explain the science, if anyone wants to geek out. IR detection for CO is used every time you get a state emissions inspection for your vehicle. It's cheap and...

I suspect that's +/- 3% of the pO2 absolute, not percent of O2 in the gas you're measuring. E.g. air has about 21% O2, which is 0.21 atm pO2. +/-3% of 0.21 atm means a possible range of 0.204 - 0.216. Or at 1 atm total pressure, a range of 20.4 - 21.6%. Also, 21% +/- 3% (18% - 24%) would...

Great video! Thanks for posting! What video light were you using with the GoPro? And were all the clips from a GoPro? Some shots looked to be zoomed in closer than others.

Yes. Some folks will say it should be 140 at some depths, but I just use 120 as a "sanity check", not for careful planning.

We dove the Cats in January 2018 when my daughter and nephews had <30 dives, as I recall. My dive logs show we never went below 65 ft. The only issue I recall was some surge, but nothing too hard. The vis wasn't great due to all the nutrients in the water, but that's what attracts the...

Does anyone have any experience with the DIveVolk phone cases? https://www.divevolkdiving.com/

Good point about being conservative, but I'm not sure it's really significant when you consider all the variabilities and approximations that go into MOD limits and OxTox. I'm not a fan of normalization of deviance, but I don't see this as an issue with +/- 0.5% pO2.

I was assuming it measures more accurately and rounds up/down like most electronics. The sensors and basic electronics should give a signal with plenty of decimals, but they can probably save some pennies on the display by showing fewer. 31.1 should should round down to 31%, 32.6 would round...

Odd, I haven't had to enter my PW for the shearwater cloud in ages (iPhone app and Mac Desktop). That said, I find some aspects of the Shearwater apps really annoying and poorly programmed (UI), but I use them for redundancy with Subsurface. YMMV.

It's basically telling you that 32% could be anywhere from 31.5 - 32.5%. Have your students calculate MODs for those values. Isn't there something about measuring with a micrometer and cutting with an axe? :D What I'm less sure about is how the uncertainty in calibration range (20.5 - 21.5%)...

I'm not a tech diver, but I now have confirmation I'm a pompous wanker:D . I will admit to often ending rec dives by hovering not only at the "safety stop", but also at 10 ft while waiting for others to get back on the boat. It's very relaxing and I'd MUCH rather hang out at 5-10 ft rather than...