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Metal conveys heat better than plastic does. There is air inside the glove, though. Air is a pretty good insulator. In addition, you will wear some inner gloves keeping the outer glove away from skin and slowing convection. So, yeah, the replacement of a plastic ring with a metal one affects...

I guess we all agree on the importance of a rescue diver course (or stress & rescue or whatever it might be called by agency X) as soon as the diver is capable of doing one in a meaningful manner. How soon this course should be taken is a more difficult question as it depends on the individual...

You do not need weights or a BCD to dive in warm water. I do a lot of cold water diving in swim trunks carrying an AL80 cylinder (in my hands; your preferred attachment type may vary) and no BCD and no weights. Two pounds of freediving weights would be comfy, though. Hence, you could carry a...

Time and experience. And if you run out of gas you swim to the surface. 60 feet is doable, but it might require basic freediving experience to be safer.

The reason for this recommendation is that recovering an unconscious person from the bottom requires basic abilty to control oneself. Rescuing an unconscious diver was part of the PADI RD course I did a long time ago. Very basic dive skill is also required before anyone can perceive the...

You need to be able to keep a stable depth, stay somewhat stationary, turn efficiently and to be generally in good control of your position under water. Once you master that, and start to perceive what happens around you, only then can you start to rescue someone. It's not about the number of...

Well, I dive in 61F water in swim trunks. This is a bit extreme, though. Tolerance for cold will vary between individuals. The skinnier, the colder.

If you plan on undertaking more serious dives you will want two cylinders of gas. Cold water / drysuit might mean 12 litre 232 bar cylinders (Europe) or HP100 (USA) or something like that. Warm water and wetsuit might mean 2x AL80. Deep wreck dives at sea are typically done in backmount doubles...

Nice! Two suits. The black one is a diving drysuit for backmount divers specifically, while the green one is some sort of rescue suit for surface operations.

Decompression illness happens when the ambient pressure drops too fast and the nitrogen (etc) in your blood want to exit too fast. It can exit either to the exhaled air or, given some conditions (depth) are given, into the bubbles in your blood stream. Then latter, of course, is quite unhealthy...

This is a precious post. Thank you.

Well, I just assumed that salt water causes more corrosion than sweet water. Publishing an assumption is a way to ask for more detail. Hence, verification. No need to take that personally.

How do you attach the Xdeep wing? It has two holes, one in the top end and one on the bottom end. I have hard time understanding how these could be attached to 2 inch webbing. Or maybe publicly available sidemount plates (if I would use such) have appropriate holes? The whole problem here is to...

All this assuming salt water, I suppose

I have them now. I've had them for a couple of years alredy.

I have been diving sidemount since 2011. My DIY rig is growing old and the wing is no longer in the best shape possible. I want a new rig. I'd like to hear your suggestions. I will list some criteria below. In short: no low profile D-rings or square D-rings or other weird stuff (KISS), weights...

Similar lower prices (1/2) where I live in Europe. I suppose it is an european thing, maybe, actually, rooted in values.

This is why we love sidemount. Nothing's gonna roll you upside down. To the OP: Servicing regs can be a boring job and tools may leave marks. You do love your own set a lot more and will be gentler (which does not always guarantee mint results, though), so I 100% agree with this.

Was it a neglected tank? No hydrostatic pressure tests done? No visual inspections? I thought cylinders would fail in a controlled manner if they were only overfilled. Was there an oxygen fire?

Isn't that a bit expensive? How much do the parts cost? How much for labor? I am not aware of the price level in the U.S. but it's hard to think that neoprene as a material would be costly. The DUI brand may be, though. Locals may give you a better answer.