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In case you don't already know, the insurance from your credit card probably won't cover anything more than an 8 passenger vehicle. Your own auto policy might, but it would be a good idea to check.

And, being people, we're especially wired to see patterns of the sort that resemble faces. We therefore see faces in similar patterns:

Not that there aren't good reasons not to leave a boat unattended, but what's the law that they use to inflict this world of hurt?

A USHGA/USHPA license is a good analogy. Like a c-card, they're issued by a private company, subject only to the rules of that private company, and neither is legally required to engage in the activity. The only thing preventing PADI or anyone else from slapping an expiration date on the card or...

Everybody with a deductible is self-pay until they reach the deductible.

I'd want to swim away from the wall. It might be caused by tidal flow through some kind of restriction, but it also might just be current flowing past some feature on the wall. If it's caused by moving water reacting to some kind of topographic feature, then getting away from that feature should...

I've seen gauges that have a yellow zone before reaching red, and I've seen 3000 psi gauges with red starting at 1000. Those colors are useful for getting your attention, but it's the numbers/pressure for the tank that diver is using that matter. Maybe it's not what you meant, but the way I...

Yeah, another 5 dives in the spring would have made everything all right. My opinion is that when dive ops start telling divers what they can't do they're implicitly telling them they can do other things, but if they haven't already seen you dive they have no idea what you're capable of...

As a diver you may remember off the top of your head that water is 800 times denser than air. That would make an aircraft ascent rate of 2400' per minute roughly comparable to a diving ascent rate of 3' per minute. Short of a very rapid ascent to altitude, I expect that the question is just at...

Interesting idea, but I don't see it happening. The biggest obstacle is the phone itself. The Galaxy SIII has a pressure transducer that measures altitude (including below sea level elevations that only exist in very deep mines), but who's going to produce one with a depth gauge and make it...

You could start by looking under whatever settings are available. It has to let you set time and date, and fO2, assuming it's nitrox capable. Alternatively, find an electronic copy of the manual and search for imperial.

I've encountered that twice. One was a young girl I insta-buddied with. I forget how I communicated the issue, but she was cooperative enough to hold still while I got it squared away. IIRC, it was her mom who surfaced with mask lines that looked like she'd have them the rest of her life, and...

To a certain extent I've always been expecting the unexpected while diving, since even with several hundred dives I still tend to feel that diving offers a lot of new experiences. Perhaps the two things that came the closest to actually surprising me were times that I've accidentally fed...

Even if I make a deliberate effort it's not especially easy to breathe out through my nose and mouth at the same time. I think there's a bit more resistance through the nose, so the air takes the easier path out the mouth unless I close my mouth a bit to create more resistance. With a mask...

Tim Meadows

I was afraid I might confuse him by pointing out that it's algebra and offering a bunch of info. I tip my hat if you've managed to confuse him so succinctly.

You've got it right. Any object that is floating will be displacing its weight. Take any object that weighs 100 pounds, and as long as it's less dense than water it will be displacing 100 pounds of water once it's immersed and floating. If you know the weight you can calculate displacement. If...

I don't suffer from it, but if I don't pee a couple of times on a 45 to 60 minute caribbean dive I figure I'm not adequately hydrated I don't see that warming the kidneys would help. Cold extremities and pressure both result in moving blood from the extremities to the core. To your body's...

I've figured for a long time that most people who do a lot of diving over consecutive days probably end up with a chronic, but minor, case of hypothermia. My body temperature is an awful lot closer to 100º than it is even very warm 85º Caribbean water. I've also been in a portable hot tub that...

I think the jury is still out, but there may be a relationship between stress and stomach acid. If you're feeling a bit nervous about diving perhaps that's at least part of the cause.