Many years ago a fluid was developed that contained oxygen and could be "breathed". It's one of the things used in the film Abyss, I believe.

My understanding is that the main problem in a person actually breathing the fluid is that the fluid is denser, heavier, and more viscous than a gas (air). We are not used to or designed/adapted to breathing that fluid, and trying to do that would not go well long term. This is something that I remember from various videos and things that I've read over the years. I could have some details off.

Per one YouTube video.

Sinus/ear cavities implode - that the last person would feel if it took two seconds instead of 30 milliseconds

Blood/guts are forced into any porosity in the bones.

"Guts"instantly fill lung cavity.

Air is cooked to surface of the sun heat in that 30 milliseconds but it's a tiny area. I don't think that would puree remains as it would be hot for such a short period of time.

I kind of think there would be a mist and a few remaining scraps.

When I first heard they passed instantly because of the implosion I was relieved.

I think Myth Busters did a show on a deep sea diver and they recreated where the pressure changed rapidly and the diver's body was forced a good ways into his spherical helmet.

I certainly wouldn't volunteer as an experiment subject. I'm sure it wouldn't be fun or pretty, but I suspect the physical, visible impact would be minimal. The human body is surprisingly resilient. My guess is that the ribs will resist compaction, so the stomach area will compress pushing some of the internal organs up towards the lungs. The throat/neck will probably also compact.

People get run over by vehicles directly across their torsos and come away with bruising and possibly some broken bones. 2.5 miles down exerts more pressure differently, than getting run over by a vehicle, of course.

“Mr. Solo had a pressing engagement.”

- Auric Goldfinger

I didn't watch them from the beginning.

Frankly, I think they should leave it all on the ocean floor. Once it was determined there was no one to rescue, it should have been shut down.

Right, ears definitely make sense. I know that swimming in a deep pool has always been very uncomfortable to me, and my right ear bothered me for a week after I went skydiving. Sinuses, mouth, throat would also be a bit of a mess.
I wouldn't think the bones have any air pockets. I believe they are full of fluid, and therefore no porosity to fill.
Absolutely. It would be like an extreme version of sucking in your stomach.
https://i.ytimg.com/vi/14veOCV46z8/hqdefault.jpg
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I wonder how that flash heat would work with the ingress of water as well.
Yes, that video was linked farther up this thread. But the fact that the body was sealed into the suit and most of the suit was soft with the helmet being minimally compressible makes that particular example an apples to oranges comparison.

Kind of dated, in that this was shot before the sub was found. Poignant, in kind of a strange way, though.

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Jeff, to me being the nagging step-wife, speaking of submarines, what about that R/C hydro of yours? nag nag, you haven't even floated it in a bather tub of water to check C/G balance.........Will it run in 2023?

I remember watching a program and one of the hosts was talking to a person about liquid oxygen and held held a cat immersed in the fluid. Pulling the cat out after some time, the cat was fine.

Maybe I’m misremembering?

I think the one that I saw (and I think this was in the 70s) was a mouse. But they may have done it with other critters too.

https://en.wikipedia.org/wiki/Liquid_breathing

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Gotta be like getting waterboarded.

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Breathing liquid could be a way to dive deep without needing the submersible to withstand deep ocean pressures. The whole craft and occupants are filled with liquid.

That's cruel. They should have used students.

[QUOTE=masraum;12034934I wouldn't think the bones have any air pockets. I believe they are full of fluid, and therefore no porosity to fill.[/QUOTE]

You would think any blood would have found it's way in before but that's only what the guy on the video said. On the other hand, 5,000 psi can do things we don't normally comprehend as Newtonian physics.

The Mythbusters clip was not the same as this subject implosion but it sure stuck with me. That was probably several hundred pounds vs 5,000 but I'll have to double check.

I think every cell in the body that contained air or oxygen would have collapsed. The lungs and sinuses… they would have filled with water.

I don’t know about you guys but I have a hard time keeping my mouth shut sometimes and for sure it won’t hold back 5000 psi.

While working for an off shore geophysical research company got to check out a crushed data canister from a streamer that had been recovered after breaking free from the towing ship. The streamer was made up of alternating hydrophones and canisters that would process the sonic data and send it back to the ship. At the end of the streamer was a buoy. The buoy keep the far end of the streamer afloat but the end closest to the ship sank straight down before it could be recovered. I am not sure how long the part of the steamer was that broke off. The canisters were a titanium cylinder about two feet long and five inches in diameter with a connector at each end to connect to the steamer cable. They were filled with a sandwich of PC boards and shock absorbing foam. The ends were welded on titanium plates with the streamer connectors embedded in them inside of a threaded ring that attached to the streamer cable.

The canisters that went the deepest looked like crushed beer cans in the middle. After sawing through them to get a across section view, the foam, PC boards and all the components on them were just squashed into a solid mass between the folds of the crushed canister. Was very impressive. I wish I had a photo to show but only can find this of a typical streamer setup.
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True