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Mine are in the shape of a "D" and have a hole in the middle. The two chest ones are bent the others aren't. Don't know if it would really make that much of a difference if it was reversed though.

Take a look at how the professionals operate and not what you see on TV. Look at your local EMT's when the respond to a call. Very rarely do you see them running from place to place. You will see them firmly striding with their head up and looking around. Why? Because they know the first...

Yes there are high risks. Lung Cancer, Emphasyma, heart attacks. Or did you mean risks with the chamber ride?

BC's are NOT life support equipment! They are a nice bit of kit to have, but people have been safely diving without them before and after they were invented.

Once they are in "full blown panic" all reasoning has stopped. In your scenario, its unlikely that being 20 feet away you will get to them. They will already be on their way to the surface most likely extremely fast. Speaking harsh truths here, they will either get to the surface conscious...

Those aren't your cool dives, they are someone else's. :) Why practice maskless ascents? Because you are asked to do them in classes.

Shooting a bag and putting the maskless diver on the line can really help as well. The maskless diver can splay his fingers of his right hand and run the line over/under the fingers. This way even with thick gloves he can feel if the line is moving up or down and adjust his bouyancy...

Thanks... Now bow down... Bow down to General Zod, earthling!

Oh that's it everybody. Its ON! Its ON! If my primary 21 watt light failed to strike, I would go and get my 10 watt. So I guess like the joke says, I am already a prositiute and now we are just negotiating the price. I dont know if I would do a fun dive penitration on just backup...

I think he just did. You just got served! Your options are now to walk away or serve him back. Remember though... if you serve him back then... Its On!

I really don't get where you are coming from here? Where was I saying you make compromises? Where did I bring in solo diving, deep air or any of the other crud you mentioned into the converstation? Does the boat captain need a fundamentals card to be DIR? If so then I guess we have one of...

"Cattleboats aren't DIR" was a blanket statement that to me just reinforces the negative steriotype that has been present for a while. Doing it Right is about taking a honest look at your present conditions, doing a risk analysis and adjusting your plans accordingly. Depending on your dive...

What exactly do you figure is BS? I am thinking this is an east coast west coast experience thing. Very similar to how rjack corrected me in my over simplification of Puget sound boating. The pacific has a huge surface area to generate wave energy and Monterey has no outer islands to help...

Why exactly are cattle-boats not DIR? I have heard this phrase alot. You talk with the captain and work out what responses he expects to perform in normal operating conditions as well as emergency procedures. You tell him what actions you expect take in contingencies. Finally you take into...

#24 or #36 line is not going to stop the boat from pulling/dragging its anchor, its going to snap or drag you with it. It could also do such things as pull the reel from your hand (bad) or snap the line further away from the starting point. So now in addition to having to deal with navigation...

Even with a simple silt bottom you can usually make your own tie off point by simply taking a backup light, wrapping the line around it, turning it on and jamming it into the silt.

Just as a side note, you can just as easily check the SPG under the arm in a cave and not throw weird light signals. The glow in the dark crap they put on SPG's doesn't need that much light to activate. you can use the edge of the light cone from your light to charge it up and then simply...

ummm no. Bottom stages are not backgas.... bottom stages are tanks that can conceivably be mixed up with your deco gas. Proper markings should be on them. Gas switching procedure is there for a reason. One changes the procedures at their own peril. You can't visually confirm the MOD of a...

Twisted nylon line that you can pickup at the hardware store will work in a pinch. The only thing is that twisted line isn't as resistant to abrasion so you might find yourself replacing it a bit more often than you would like. The most pure form of the definition, "cave line" is simply...

I will also state that the time I got rolled in the surf (the wave made me do a superman impression up the beach) about half my gear was non-functional afterwards. (the knife wasnt deployable and the inflator hose would stick open.