I seem to recall, only a couple years back...reading adventure the odd SF yarns where the elite navy SEALs or the secret agents attacked their enemies from the water using high tech rebreathers instead of scuba tanks because they didn’t make any bubbles and were stealthy.
I was shocked to find out that they’re actually doing it now. It’s threatening to become mainstream, and even some sport divers are starting to use it. I’ll be damned. I looked it up on google. Still can’t figure out why they’re doing it, it doesn’t seem to be any cheaper, or more efficient or safer...
I recall some other movie years ago where the divers were using “hyper-oxygenated fluids” for some reason... where they were actually ‘breathing’ a liquid. Are they actually doing that now too?
I may have to update my machine.