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And that is what I am complaining about. That is just bad management. As is subsidizing shipping out of China while charging importers who have brought the product into the US more to ship within the USA. You are being very deceptive comparing the military to the postal service. As you well know.

You trying to tell me the military as well as the post office funds it's own operations?

Uh huh. Who is going to pay for retirements for all those Federal employees? https://www.realclearpolicy.com/articles/2022/06/23/the_us_postal_services_insatiable_appetite_for_taxpayers_dollars_838732.html...

A raise in rates does not translate to no subsidies.

The smallest flat rate box from Seattle to Oroville WA, about 270 miles is $10.60. $6.82 for up to a kilo from China. Yes Trump raised the rates way up. Yes, they are still heavily subsidized. Impact on small eCommerce packages from China On July 1, 2020, USPS raised the fees it charges for...

With the US taxpayer paying the postage. Don't forget that part. We are paying the postage to move jobs out of the USA.

Yes, if tanks are going to be painted, white is good.

And the US government subsidized the postage. I'm gonna miss it, but it needed to go.

I can buy 100 for a dollar. I suspect if I asked for a million they might cut me a deal.

Still a penny a piece from O-rings and More.

The pressure you are breathing it at is the same.

This is what you said. "The composition of the cylinders holding that volume of gas also plays a role." It is false, in relation to buoyancy change.

Some tank materials lose weight at the end of a dive? No, it is only the air in the tank that changes.

True. You weight for the end of the dive not the beginning. That is up to your BCD.

Nice, but heavy.

No, I have one spare but I'm keeping it just in case. They are not the way to go today. Too old, too hard to fix.

If you want to get the most O2 out of your air and get rid of the most CO2 when you exhale, you will pause after the inhale, not after the exhale.

If you wear the same amount of lead. Which even you know not to do.

But you are carrying enough weight to offset that buoyancy. It is the change that matters, not the positive or negative buoyancy of the tank when empty.

And what is the buoyancy shift for an HP80? I'll give you a clue. It is slightly more because it has slightly more air and 500PSI is a smaller proportion of its air.