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Do some reading; athletes in general do NOT have bigger lungs. In endurance athletes, their oxygen uptake values are often higher, but that's not the same thing, and is unrelated to lung capacity.

Different people have different setpoints, so you can't compare yourself to your wife; she's probably physically smaller than you, which would tend to make her heartrate faster, and her oxygen consumption lower than you. The point is not to *breathe* more efficiently, it's that your body USES...

Possible, but it's hard to believe that someone with 700 dives couldn't fin to slow her descent while working on her inflator hose or valve. I could do that kind of stuff with less than 50.

Thanks for this, especially the last paragraph. Any athlete knows this, but may not have the credentials or references to help convince others of it. You have the credentials to say it and get people to believe it...

Last dive on last day of a week in Coz, several of us wanted one more trip.. DM says we're going to a spot whose name I don't recall (though it's in my log), and other divers start complaining that there's nothing to see at that area, it's a waste of money, etc. DM says "trust me, I know where...

No, 500ml of water is a bit over 1 pint, which is only 1lb of buoyancy.

Mine was pretty good at teaching buoyancy and control in the water, and liked to show off by doing things like motionless headstands, etc, so we could see what can be done with practice. Other skills, not so much: his CESA drills were rather useless, IMO.

It appears that you had one of the poorer instructors. My OW instructor did indeed explain and demonstrate, and then require us to demonstrate, the ability to control depth with just breathing. We were actually vertical (the Buddha position), but were in mid-water, not sitting on the bottom or...

I use a non-AI computer and compass on my left wrist, which are my primary depth gauge and compass, and my console with SPG, backup depth gauge and backup compass. I didn't plan it that way, but the console came with the used reg set that I bought, and I found that I didn't like the compass in...

Take some time (a dive or a day) to recover. I skipped a dive in Cozumel to give my ears a chance to recover, and was glad I did.

My Suunto won't work past about 30 deg of tilt, but yes, the window in the side could be usable, depending on the situation.

Agree, as long as I have a visual reference to keep a good course. Compasses don't work upside down...

It's not in the manual any more.

I have sinky (NOT stinky!) feet, too. 2 to 4 lb on the tank band, with the band in the top position of my BC did the trick.

Both!

Nice summary, but I would disagree with you on one relatively minor point: Just because your weighting allows you to hang horizontally, does not mean you can hang head up or head down as needed. That takes some additional tweaking of your weight distribution to be able to hang in whatever...

"On the boat with 500" may be common, but it's certainly not universal. Both trips I've taken to Coz, the DMs had us STARTING UP at 500 (700 on a couple of the deeper dives) psi in in AL80. No mention of what they wanted us to have left on the boat, but I don't think I ever used more than 200...

For me, it's the safety stop. If I can't hold that, it can be somewhat risky, or at least aggravating. If I am neutral at the safety stop, I have no trouble getting down at the beginning of the dive when I have the extra weight of the air in my tank helping me.

I was the guy who was teasing you a bit about using dry suits, and needing to go slow with the scooters because of the vis.

Were you one of the guys I was chatting with going out with scooters and a dry suit?