nereas
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1)Agreed, but if you are already negative with double steel tanks, adding ditchable weight does nothing to help you in the sea or in the cave. That's why things like redundant buoyancy from dry suit, lift bag, etc become important.
2) Agreed, but your statement that those without ditchable weight are unsafe and dangerous has no bearing on cave diving. Which leads to.....
3) You've got it backwards...those who think their open water protocols are adequate for cave diving are grossly mistaken.
If you are already negative without any ditchable weight, then you surely need to switch out steel for aluminum, as in an aluminum plate and aluminum main tanks.
Why does this sound like rocket science apparently to so many people here? Did I/Qs recently take a nose dive? Or is it the decline of the public education system?
I realize that being negative with no ditchable weight is Darwinism at work. But I think it is sad, all the same.