[BBell]

I don't dive and I knew nothing about closed-circulation rebreathing dive equipment so I looked it up.

Anyone have any experience with these closed-circulation rebreathing devices?

[OKSooner]

I don’t know jack about any of it except that sounds kinda deep to me...

[Fantasywriter]

Prayers that they find him.

[bray]

Burp!

[Responsibility2nd]

Gee. Who knew breathing in Carbon Dioxide would be bad?

[Gay State Conservative]

He had to know that his was a dangerous occupation...or obsession (conservationist?).

[Timpanagos1]

Looks like the sharks invited him over for dinner.

[JudgemAll]

I was buying gas masks and they had similar systems for firemen working forest fires. They last longer but I suppose it is technical.

The issue I guess is that once
you start running
out, the tank
is
cold and always has a little bit
of oxygen left.

My friend once
ran out and he slowed down his breathing so the tank would defreeze some more
oxygen

[Snickering Hound]

[unlearner]

If you want my body...

No, wait. That would be Rod Stewart.

[dowcaet]

I’m guessing the sharks are conserving part of his carcass for later consumption.

[xp38]

Too bad he wasn’t a lawyer...professional courtesy and all.

[katana]

They’re more suitable for very long dives. Modern rebreathers, which remove exhaled CO2 and replace it with a suitable amount of oxygen, can allow dives of up to six hours duration. The military uses them for that reason and because they do not produce bubbles that give away the presence of divers. The lack of bubbles also has advantages for nature study and photography. Bubbles and the noise from regular tank dives (sounds in your ears like Darth Vader gargling) can frightening off the subjects they’re studying. Very sophisticated and much more complex equipment so there’s more that can go wrong. And at a depth of 225 feet when something goes wrong you’re likely pretty well f’ed.

[JeanLM]

These kond of rebreathing devices were developed during WW II by the “frog men” or UDT units; now called Seals. Gave out no bubbles so the divers couldn’t be easily detected. I’m sure they are far better now but then you can always stay under too lons or have a malfunction. 22 feet isn’t deep so nitrogen isn’t likely the problem.

[JimRed]

According to the Sea Shepherd email, the boat crew members think Stewart passed out as well and floated off.

Sea Shepherd? Isn't that the crew of greenie pirates who attacked the Jap whalers?

I'm not in favor of whaling, but I'm even less in favor of violent leftist greens!

[Vendome]

[ConservaTexan]

https://www.youtube.com/watch?v=V2ewx9vIw68

[kvanbrunt2]

Rob “Fishbait” Stewart