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Maybe, but good divers tend not to use so much gas. I wouldn't say it has nothing to do with it.

Get a DUI weight harness and put a lot of your weight in it and adjust the shoulder straps longer to get better balance towards your feet.

I certainly wondered it the project would be completed under a new president. The new president will want a new boondoggle for their legacy.

Anyone who dives Coz without an SMB is assuming everything will go well. I always have mine as do my buddies.

I checked the map. Station is out on the Ruta de los Cenotes. Not exactly convenient. I'm good with that.

I don't feel the same. As a diversion during the dive I'd be glad to do DT again. As a whole dive? Nope.

I spent several weeks in Puerto Morelos in January and February. Never saw the train or tracks.

I agree, you don't want to wait too long. Leave the big gas user with plenty of air to finish the dive.

The advantage of trains is that someone else can ride them and reduce congestion for us.

The overhead electric lines will be connected to a natural gas generator anyway.

They generally favor it. That does not mean it is working out for them. It will not, IMO.

Donating air when your buddy still has plenty to get out of the water is a simple way to extend a dive. Continuing a dive like this when one buddy is out or almost out is foolish.

That's what I said. There are lots of ways of looking at it. Nobody knows what is correct.

https://dan.org/health-medicine/health-resources/diseases-conditions/oxygen-toxicity/ You can find all kinds of opinions on how long it takes to "reset the O2 clock" and how fast pulmonary O2 danger passes and whether or not the buildup affects CNS toxicity as well as what are safe levels of O2...

There are several different ideas on oxygen exposure.

Which is to say that you feel better with less decompression stress, which is why I feel better with nitrox.

I am greatly amused by all this. My sensors do not always read differently. The one that reads deeper will always read deeper, if it is reading deeper. I suspect it may have to do with atmospheric pressure at turn on. Sometimes they read close enough that I have a hard time telling the...

I agree with all of this. What will decrease your gas consumption is not moving. If your arms are moving it takes oxygen. If your legs are moving it takes oxygen. If you stop moving and immediately start to float or sink, work on your weighting. Start thinking ahead about where you want to be...

A 6' DSMB might have 40 lb of lift if full. To deploy it at 10 meters and have it full at the surface you would have to fill it half full. 20 lb of lift. Not going to happen. I like to have a big DSMB because it is a backup flotation device. Since I don't want to carry two, I accept that it is...

Psuedoephedrine causes reverse blocks? I have had the opposite experience. Only been diving with it for 39 years though.