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This is patently incorrect. Sweat works because, in the process of evaporation, the vapor removes heat from the water that is left behind which, in turn becomes cooler. When you are submerged in water, there is no evaporation from your skin, so the sweat does not help cool. It only acts to...

The least of your worries here is contaminants. A proper scuba regulator system (including the ones used in SNUBA) will deliver air at approximately the same pressure as the surrounding sea water. This device has no regulator on it whatsoever. It is likely to collapse or over-expand your...

I always carry an SMB. However, if there is a very low risk of boat contact, I will leave the real behind.

First. It is not a myth. It is a misunderstood statement. You cannot keep water out of a wet suit. If you could, you would get some pretty painful squeezes. A wet suit (including semi-dry) is designed to prevent additional water from circulating once water has initially penetrated the suit...

I most certainly would not argue your original point. I also would also agree that for well known small caves, technical wreck penetration training should allow one to safely navigate the environment providing that the same protocols are followed. I know (through research) quite bit about...

According to your SB posted credentials, you are not a cave instructor or even a cave diver. I would be wondering why you would take ANY diver into what, by definition, is a cave.

I know the shop. In future, you are best to go to him armed with the online price and give him a chance to compete. He can give you very good prices, often better than what you can get online. For you current issue, you would be best to remind him that your membership comes with a discount...

If this is not a skill you have mastered, it is one you should practice. You should be able to disconnect it in a few seconds.

I second the other comments made here. Your pull dumps can let air out a lot faster than your power inflator can let air in, buying you time to disconnect the hose. The connector is specifically designed so that you can disconnect it under pressure. If you cannot do that easily, buy a new...

The pre-dive planning with your buddy really should be a comfortable easy-flowing experience. You should be sharing how you like to dive, personal limits, things you have seen on previous dives, what you would like to do on this dive, whether or not you would like to break off from the group...

I would agree here, but add the following: If the OP had attempted to do a proper dive plan with his insta-buddy, most of this should have been done before the first dive. If the insta-buddy was unwilling to participate in the dive planning, then that would have been the cue to select a new...

I doesn't take much of ascent for bubbles to start coming out of your mask. I wouldn't even notice since I breath out of my nose all the time.

There are three factors to consider. 1. Your BAC must be zero while you are diving. Keep in mind that there have been several drunk driving arrests where people got drunk the night before, and were still drunk in the morning after thinking they had slept the alcohol off. I have an associate...

Yes. If you are weighted perfectly at the end of the dive, you will be 5 lbs over weighted (with an AL80) at the beginning of the dive because of the extra 5 lbs of air.

You will necessarily be 5 lbs over-weighted to start due to the air your tank. As a rule, a new diver, when properly weighted (that is to say 5 lbs over to start), will have a little bit of trouble leaving the surface. If you are in thick exposure protection, after about 5-10 feet, you will...

This is actually a good argument for never filling a tank with Nitrox unless it has the appropriate sticker. Non-Nitrox divers should always be able to tell they are getting air because they don't have the sticker. The other way is not a danger. If you ordered Nitrox, and got air, you...

Forgive my lack of knowledge if I am incorrect, but isn't "rig where you can adjust the Hogarthian harness" a contradiction in terms as a Hogarthian harness is by definition made of a single long piece of webbing? I am not criticizing your choice of harness, merely questioning your...

This thread is measuring a little bit low on my truth meter..........

First off, I was taught to do a 3 minute safety stop. Second, this is only 4 cf until you reach IP, the point at which your regulator will start breathing very hard.

I agree and disagree. Certainly, blowing off safety stops to meet the 500-psi-at-the-surface limit is simply nonsensical. Even worse, is racing to the surface after the stop in order to have 500 psi left in the tank. This really defeats the whole purpose of the stop. However, I think that 50...