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I completed my Cavern / Intro Cave course recently using my comfortable ScubaPro BC, with a slung AL40 as the redundant air source. I could have used doubles & BP/wing but I've only recently had experience (AN/DP course) with that setup and am not entirely comfortable with it yet. I was...

They're all over the Carribean. I've seen them while diving and snorkeling off Roatan beaches. Gold spot eels if memory serves.

When I was diving in Coz early last year all the tanks had the yoke inserts which could be removed. Heck, as far as I could tell they never did change an oring. Everytime I asked to change the oring on the tank, they just grabbed the allen wrench and swapped out the insert from another tank. I'd...

Also, there has not been that much improvement in basic materials. Certainly more exotic alloys have been developed with different properties but "exotic" equates to $$$$. Basic Al and steel alloys are pretty much the same as they have been. Improvements have been made in durability such that a...

A newbie cave diver but I've got experience in risk analysis. I enjoyed seeing how the risk analysis in cave diving closely resembled my day job (nuclear power.) The way I was recently trained, I would plan for two catastrophic failures (loss of primary and alternate regulators/gasses.) My team...

This stress is very minimal and should be a problem at all. And the wing is not fully inflated but for perhaps a short time on the surface. So I'd leave it in the down position and dive with the way you have it. Also, I've had the same reg and seen no corrosion issues with the hose protectors...

I had the same thing from brushing up against a hydroid in Coz. Wound description is identical. Took a few weeks to completely go away. I don't see a scar. I didn't use steroids but only because I didn't go seek treatment (my patch was smaller than the OP.)

The cynic in me wants to ask the OP whether the shop was doing a brisk business in DIN to Yoke adaptors. In which case it might be more about getting more tourist dollars, pounds, yen, yuan, etc.

As a recently certified Dive Guide / Dive Con, I'd not hold back O2 for anyone who asks for it. But I'd also be calling EMS. The O2 on the boat in the kit is for medical emergencies. If you ask for O2 from the medical kit, I'm not going to make the medical judgment that you don't need EMS. It's...

How old is too old to get certified? When you're dead. As others have said, if they can meet the standards and medical, they get the card. Then have fun! Also, if there are some standards they can't meet then they can also take advantage of the Classified Diver certifications (SSI version ...

If the Kittiwake was at 100 ft, I would be much more hesitant to go in it myself much less guide a non-wreck certified group into it. The air consumption rate at that depth would sufficiently reduce the margin of safety since the routes through the Kittiwake are not straight through from one...

One can delegate authority but not responsibility. Carl

A similar list could be developed for the Kittiwake off Seven Mile Beach, Grand Cayman. I would guess that over a hundred divers go into this wreck on a daily basis on guided tours. Granted it is not as deep as some of the Florida wrecks, it is still a wreck. My first time through I had over...

It was something like the SuperLite 27 or 57. It wasn't surface supplied and the only gas that I recall was the Al80. I believe the injury was something that prevented equalization in water but he obviously could do so in air (otherwise even the helmet wouldn't work for him.) He didn't have...

Last month in Grand Cayman. Actually, it was more like this: The individual was using a hard hat (similar to the above but complete hard shell around the head ... a Kirby Morgan) for recreational diving. He had an injury that prevented scuba using normal mask/regulator and the way he could...

Definitely a good cause and a great way to donate time while diving. The anchor drug along the bottom so the reef really needs our help! With a bit of help, nature will do the rest over time.

Never mind. Not worth spending the electrons.

Thanks. The question was just trying to validate RNT could be used with deco tables for repetitive dives. I didn't see in the TDI book that specifically discussed it. It makes sense but every assumption I make is a likely error.

Thanks! I suspected as much but didn't want to assume it also applied to the deco tables. I'm over in Seneca west of Clemson so reasonably close to you. I'll drop a line with other questions as they arise! Most of he others I have at the moment are related specifically to how the instructor...

Working through the TDI Deco Procedures book in preparation for the class at the end of January. A question occurred to me reading the explanation of the deco tables. For a repetitive dive, deco or NDL, can you use the residual nitrogen group to get the residual nitrogen time and apply that RNT...