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You do not need S.C.U.B.A to get the bends on a freedive. Herbert Nitsch, no limits. He did not walk well after his survival. Herbert Nitsch - Wikipedia

For many people diving is nothing but a fun day trip. They pay for it and they expect to be taken care of. Diving as a hobby or as a profession is much different.

Which bungee setup? There are several. I am using a 1980s style bungee around the valve knob, which is pointing down, not to the side, (twists 45 deg out while being used), and it is easy to use (with a thumb) as it is not overly tight.

Oh, sorry. ESF/FSE might not cut it... Backmount and european caves might not always be a happy marriage. Sounds like CMAS, founded in France :D There are many organizations, PSAI, CMAS, NAUI, IANTD, TDI, ... but you really need to pick a good instructor who actually does cave dives.

You need a new hobby where you will meet sidemount cave divers and find a more affordable path. Now, this path starts with no water. https://www.eurospeleo.eu/

I contest that! How could it be weird? Link: Youtube Yeah, that is the point!

And, hey, we want no cylinders on our backs 😉 Have fun!

https://cavedivinggroup.org.uk/

Sidemount is practical in sump diving (low space), in search and recovery diving including ladder entry (balance on the ladder), anything that requires hauling or pulling or carrying or sawing stuff under water as it lets you bend your back, and so on. It's also lovely for underwater acrobatics...

True This is untrue as a non - hard hat diver does not have that surface connection. The pressure inside the suit is constant and it cannot escape to the surface. The hose however, which goes to the surface from a helmet will let all pressure out. The diver is thus crushed and fed up the hose...

began to experience drysuit squeeze which does not happen during descent - unless, of course, you were carrying exorbitant amounts of weight, too much for the drysuits physical volume and the BCD to compensate for (this must have been an user error, or else you would be dead) This is actually...

As a sidemount diver you will enjoy your freedom. You have your harness, your regs, and stuff. You go diving wherever you want. No staff, no hassle. You need to get the cylinders filled of course, but you own them, allright? Be it AL80 or smaller European 7L 232 bar steels or something else...

A friend of mine suffered a catastrophic drysuit failure in such a temperature. He had to swim 20 meters (60 feet) out of the mine and 30 meters (90 feet) up to the surface. He says it was not easy. If your drysuit would fail 20 minutes from shore in 35 F water, I would assume you dead unless a...

Pay attention to your fingers and toes. I do use white Hestra Quallofil liners and dry gloves (three finger mittens) for long dives. Any ordinary gloves I have tried have failed. There is no need for that canvas or for any wind stopper fabric. Just the fibre with the insulating air inside...

Jackets often have unnecessary layers to stop the wind or to provide a durable surface. You only need the insulation. Air volume, that is. It could be fiber or it could be feather, but the latter does not like moisture. Moisture (condensed or otherwise) is pretty much unavoidable. I have worn...

I went caving. My first ever caving trip. On that trip I was taken three times freediving through sump 1 in a cave. Water was ice cold. Visibility was zero. The ceiling was low. The dive was shorter than what it felt. My diving equipment consisted of technical undergarments, fleece, a cordura...

Returning with 0 bar tanks is a near death experience. It is not pleasant. The thought will haunt you for years. That's why.

I would apply the rule of thirds for bottom gas. I would also have separate gas for the mandatory decompression stops and ascent time required for the longest possible bottom time. So, let's assume that instead of gas sharing you have muscle cramps and you need 3/3 of your gas at the bottom...

I have this horse collar BCD from the 1980's and it is still working. These things have a few o-rings that need to get replaced. And a spring perhaps, if it would fail (?)

Some people are in a hurry. They will miss many details. Diving is not about speed. Diving with a buddy only, or hiring a private dive guide, can make dives more relaxed. The rest, you know, is industry - with resources (people), products (performed dives), profit, etc.