NationStates Jolt Archive


Below-The Movie(How does Decompression work?)

Harlesburg
21-10-2005, 13:41
Last Sunday night a Movie was on T.V.
This Movie was
Below.

Below is about a U.S. Submarine in World War Two that is haunted by something Paranormal but no one realy wants to admit it for fear of realising why it is haunted.
Evidently it is the former Captain who was killed by the other Officers

At the begining the Sub goes into a site of a 'U-boat' attack and picks up 3 survivors.
2 Brits(1 Female Nurse,1 Merchantman)and a Hun-who is shot.

Well things start playing up on the boat and then the Hydraulics die but they have a plan to get them going again but for reasons i wont devulge almost everyone dies(it is funny in a sad sort of way)

Well Lieutenant J.J Stephan Carros goes insane and tries to swim out from the bottom of the ocean.
He swims about 20 meters before he goes *puff* and the pressure of the sea at depth gets him.

I expected this to happen but was surprised to see the Bloody cloud come from his abdomen area.

So i wanted to ask you guys if he exploded from the belly button area and is this how it happens when one gets hit by the pressue?
I was expecting an eruption from the anus and mouth,ears,nose,eyes etc.

Also has anyone seen this Movie?
I thought it absolutly rocked.
Lacadaemon
21-10-2005, 13:45
He's hardly likely to explode from an increase in pressure, is he now?

Therefore you can probably assume the whole thing is bollocks, never mind the belly button versus anus question.

(Though gaining altitude rapidly makes you fart).
Harlesburg
21-10-2005, 13:51
He's hardly likely to explode from an increase in pressure, is he now?

Therefore you can probably assume the whole thing is bollocks, never mind the belly button versus anus question.

(Though gaining altitude rapidly makes you fart).
I dont know?
I am not even sure if that is how he died i just assumed.
"Never assume it makes an arse out of you and me"
Apart from that area i enjoyed it.
Second Amendment
21-10-2005, 13:55
If the change in compression (there's an increase in compression at depth under water) is rapid enough, it would have turned him into pulp - in essence, he would have been deboned rather rapidly.

If the change in compression was that fast, he would have died in the airlock (when he let the water in so he could equalize pressure and open the outer hatch).

Alternately, assuming that the change in compression was not rapid enough (i.e., the water didn't explode in an instant into the airlock when he let the water in), there's another problem.

If he's breathing air at equal pressure for depth, when he rises, the air will expand.

If he rises too fast, not only does he have to worry about decompression sickness (the bends), he has to let air out of his mouth the whole way up - if he doesn't, his lungs will burst.
Harlesburg
21-10-2005, 14:02
If the change in compression (there's an increase in compression at depth under water) is rapid enough, it would have turned him into pulp - in essence, he would have been deboned rather rapidly.

If the change in compression was that fast, he would have died in the airlock (when he let the water in so he could equalize pressure and open the outer hatch).

Alternately, assuming that the change in compression was not rapid enough (i.e., the water didn't explode in an instant into the airlock when he let the water in), there's another problem.

If he's breathing air at equal pressure for depth, when he rises, the air will expand.

If he rises too fast, not only does he have to worry about decompression sickness (the bends), he has to let air out of his mouth the whole way up - if he doesn't, his lungs will burst.
I know about the air expanding factor which could explain him going *puff* but not where the blood came from.
Second Amendment
21-10-2005, 14:06
I know about the air expanding factor which could explain him going *puff* but not where the blood came from.

I never expect movie special effects to get anything right.

Having been in the military, and spent a lifetime handling a wide variety of firearms and other things that go boom, I have a deep disrespect for Hollywood's depiction of how firearms "work" and how explosives "work" and how heavy weapons like anti-tank rockets "work".

One can hardly expect them to get the effects in the movie you describe correct.

But the misrepresentation of the effects of so many other things are repeated again and again - people come to expect them. I mean, when you see someone get shot in a movie, you expect them to fly backwards through a plate glass window, right? Never happens in real life.
Harlesburg
21-10-2005, 14:13
I never expect movie special effects to get anything right.

Having been in the military, and spent a lifetime handling a wide variety of firearms and other things that go boom, I have a deep disrespect for Hollywood's depiction of how firearms "work" and how explosives "work" and how heavy weapons like anti-tank rockets "work".

One can hardly expect them to get the effects in the movie you describe correct.

But the misrepresentation of the effects of so many other things are repeated again and again - people come to expect them. I mean, when you see someone get shot in a movie, you expect them to fly backwards through a plate glass window, right? Never happens in real life.
Oh come on next youll be telling me the bad guy dosent always become impaled on a spike.
Lacadaemon
21-10-2005, 14:15
I know about the air expanding factor which could explain him going *puff* but not where the blood came from.

People have escaped from submarines unassisted from a depth of around 600ft. (Prolly deeper than the one in this movie). You don't explode. Much deeper than that, and you typically run out of air before you reach the surface. (You need to forcefully exhale upon ascent to equalize with the increased water pressure, otherwise the water will force its way through your mouth/nose and into your lungs killing you).

At an extreme depth, you wouldn't be able to exhale - the pressure being too great - and your lungs would quickly fill with water, killing you. You'd also get the last enema of your life.

Even assuming that the submarine was pressurized to depth, i.e, the air pressure inside the submarine is equal to the water pressure outside (which it wouldn't be, subs are at one atmosphere, for a variety of reasons, not least of which is necrosis), the worst would be the the need to exhale as you ascended. You simply couldn't swim upwards fast enough to cause a lung explosion. (Though you would get nitrogen bubbles in you joints and CNS and probably die, horribly).
Randomlittleisland
21-10-2005, 18:32
Harlesburg, your spoiler shows up on the preview in the general forum (when you hover you r mouse over a topic). I'm not worried but I thought you might like to know.:)
Harlesburg
22-10-2005, 11:35
Harlesburg, your spoiler shows up on the preview in the general forum (when you hover you r mouse over a topic). I'm not worried but I thought you might like to know.:)
MWhahahahahahahahhahahahahahaha

Thanks i wont change it but people should watch this movie it is great.

Lacadaemon]
People have escaped from submarines unassisted from a depth of around 600ft. (Prolly deeper than the one in this movie). You don't explode. Much deeper than that, and you typically run out of air before you reach the surface. (You need to forcefully exhale upon ascent to equalize with the increased water pressure, otherwise the water will force its way through your mouth/nose and into your lungs killing you).

At an extreme depth, you wouldn't be able to exhale - the pressure being too great - and your lungs would quickly fill with water, killing you. You'd also get the last enema of your life.

Even assuming that the submarine was pressurized to depth, i.e, the air pressure inside the submarine is equal to the water pressure outside (which it wouldn't be, subs are at one atmosphere, for a variety of reasons, not least of which is necrosis), the worst would be the the need to exhale as you ascended. You simply couldn't swim upwards fast enough to cause a lung explosion. (Though you would get nitrogen bubbles in you joints and CNS and probably die, horribly).
Well he didnt really explode but this cloud of Blood surrounded him.
Thanks to everyone i shall just blame over excited Movie Executives.
Watch the movie.
Tekania
22-10-2005, 14:26
If he rises too fast, not only does he have to worry about decompression sickness (the bends), he has to let air out of his mouth the whole way up - if he doesn't, his lungs will burst.

Correct, the first thing we learn during Submarine Escape-Training.... We basically begin saying "Ho","Ho","Ho" all the way up.
Lunatic Goofballs
22-10-2005, 15:21
This subject has been pretty much covered.

If he had a lungful of air, and had actually managed to get out of the sub, he would need to exhale the entire way up.

In the movie, if this guy was nuts and panicked, maybe he didn't. The first thing to rupture would be his diphragm followed closely by his lungs. I suppose a rapid enough ascent could have ruptured his abdomen too which would explain why the blood cloud came from there. I don't know if that scene was based on theory or if someone actually ruptured that way, but it's the only way I can think of. If the lunatic held his breath, it wouldn't take long either. In recreational scuba diving, they teach us that even ascending as little as a few meters while holding your breath can be damaging.