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"Hi, I'm a Master Scuba Diver Trainer. I went from Rescue Diver to MSDT in one shot over a couple of months. I have a total of 100 dives in the 2 years I've been diving. But you can trust me with your life." There's a reason many folks detest the "zero to hero" approach to training. But you...

I think I've posted my opinion about this before. Diving with nitrox is very different than diving with air. On air you learn to breathe in and out. On nitrox it's the other way around.

The problem with the octo holder or the bungee necklace is that your octo second stage doesn't seem to be tuned correctly. It should not freeflow just because you connect it in a mouthpiece-up position. Detune it just a hair so that doesn't happen. Then any holder will be fine. Ignore this...

Been doing it for many, many years.

Yes, but it's only a matter of time.

Yes. As you read through all those threads you will see I am a strong proponent of 80% over 100%. The small advantage of 100% over 80% in terms of reduced deco is much smaller than the increased risk of O2 exposure. It sounds like you are minimizing any and all risk of O2 exposure, whether...

Mine is having charging issues now. I think it's time to make sure I download all my dives and prepare for the memorial service. There's a Petrel on my shelf just waiting to be put in service.

The best is the lead foil that comes with X-ray film. I got containers of the stuff from my dentist dive buddy. Super clean and melts instantly since it is so thin. No waste dross, so you can weigh the right amount before you pour. iPhone. iTypo. iApologize.

Damn freeloaders. iPhone. iTypo. iApologize.

How long a swim out was that? I'm looking for the deep section with the houses and planning to bring a scooter to do it.

012 is a standard size. #7 is something listed by a particular manufacturer in their manual and could be anything. iPhone. iTypo. iApologize.

I'd be surprised if it's still available after almost 3 years iPhone. iTypo. iApologize.

Schedule 40 PVC will easily handle 100 meters and probably much more. iPhone. iTypo. iApologize.

Renata's gift is one of the most generous and selfless gestures I have ever witnessed. iPhone. iTypo. iApologize.

That reflects on the stupidity of the TSA agent, not the regulations. Just another reason to put anything questionable in carry on. iPhone. iTypo. iApologize.

I bought King Kong 26650 batteries for a light I never ended up using. I bought 4 flat tops and 2 button tops. The idea was to use one button top and 2 flat tops because using all buttons would be just a little tight. Since I have already sold the light, I guess I should do the same for the...

Loose lithium batteries can not be checked. Lithium batteries installed in their device may be checked, depending on the amount of lithium. And there are special rules for scooter batteries.

Just FYI about Dutch - It was empty when I was there a couple of days ago. School has reopened, so crowds disappear during the week. I expect the holiday weekend to certainly be more crowded than it was during the week, but probably less than most weekends. Remember this weekend is also the...

Compliance with TSA regs only relates to whether the battery is ok to fly. It really does not address the issue of carry on vs checked bag. I always do it in carry on. There is a reason they don't allow loose batteries in checked baggage. Lithium batts can be a tremendous heat source and...

Interesting idea about the sand, but I would worry about concretion. You don't want to open the canister in an emergency and find the PLB locked in the middle of a boulder. iPhone. iTypo. iApologize.