WOw EXTREME DEPTH!!!!! VIIC

[Salvadoreno]

I have just took a pounding of a lifetime. Almost survived too. Strange thing was, as i was plumetting to my watery grave franctically trying to save Albert Orloswki and the crew of U-565 who in two patrols sank over 55,000 grt, my depth gauge meter ran waaay beyond 265m. I blew ballast but the boat sank uncontrollably to 330m then 350m THEN 395m THEN i hit the bottomed and my death was "uboat destroyed by collision. Interesting... WHAT HAPPENED?!

MODs
NYGM TW
Sink them All V 2.2
JIIR Manual
FUbar Crew Skins
and numerous VIIC IX and II skins..

[JScones]

You know, that was prolly the thought of every Commander that sunk to the bottom. "Bloody hell, isn't the crush depth on this thing only 300 metres? You wait till I get back home and tell them it's not the case... D'oh, I'm drowning."

395m does seem excessive though.

[Keelbuster]

Q - were the lights flashing in the command room around 395? That's the sign that pressure is crushing the boat. It can take a little while for pressure to work your hull integrity down to zero. If you were sinking really fast, you could have hit the bottom before pressure did the job, and the collision dropped you right to zero and blew the boat.

Btw - what got you?

Kb

[CCIP]

If you didn't survive, it doesn't count ;)

It's simple - the hull integrity takes a while to get drained. Heck, I think I've gone past 400m in uncontrollable dives like that - but trust me, if you're seriously hit at 200m, it's more or less death already - you'll never make it back to the surface, because before you do your hull will give out.

Not too realistic - but better than the game's instant death on reaching a certain depth. It's completely a game code thing though.

[Salvadoreno]

Ya the lights were blinking, bolts bursting, glass cracking at 300m and up. it was quite an excilirating experience.

[bill clarke]

Just what happend to the crew as the hull imploded ? did they drown or were they crushed by the pressure ?

[Salvadoreno]

they were fine. No wounded no nothing. They were just franctically working to try and survive.

[bill clarke]

they were fine. No wounded no nothing. They were just franctically working to try and survive.

I meant in reality

[Salvadoreno]

uh wah?? My "vitrual crew" was fine until the uboat was destroyed. Nobody was killed by pressure or anything.. :-?

[bill clarke]

uh wah?? My "vitrual crew" was fine until the uboat was destroyed. Nobody was killed by pressure or anything.. :-?

Yes I understand that part, but what I was asking was what happened in real life, ? I'm sure that a number of U-boats must have been lost that way, sinking till their hulls imploded, with the poor crew members still alive.

[Keelbuster]

Yea - I've often wondered what an implosion would be like. I remember from that movie Abyss, there were some pressure deaths. In the first scene an SSN goes down and floods. It never really crushed. I wonder what would happen in real life? Second, there was a submersible towards the end that sunk down the Abyss (with the badguy in it) and it imploded - really crazy sudden crunch. I wonder how a sub implodes? Come to think of it, when they survey a wrecked sub (maybe below crush depth) it is not really contorted or crushed, right? Perhaps it floods and chases the air out before the entire structure "crushes"?

:hmm:

Kb

[GreyOctober]

Implosion is a physical event occuring when the hydrostatic pressure of the outside medium (gas/liquid) of a body is greater than the inside pressure. Implosion is the opposite of explosion.

I belive that the speed of and implosions varies with the speed at which the pressure difference changes. For example, while not an implosion per se, the hull rupture caused by water pressure followed by rapid flooding. Further sinking will have no effect on the structure because the pressure is equalized. Violent implosions occur i belive by mass structural weaking correlated with abrupt pressure change.

As a rule of thumb 2.31 Feet of water = 1 Pound Per Square Inch

[BigBadVuk]

Most of the subs casualties are by implosion...U see a subs are build strong enought to withsand a lot of presure (btqw cylinder is a geometrical body with very high pressure tolerance)but at greater depths all bulkheads will colapsed all together in miliseconds interval becose of the so called domino effects: they r already well beyond their calculated stress and it is enought to just 1 of them colapse( i assumed that there is 1 or 2 ruptured compartments and that they r flooded so the pressure on the bulkheads are same as outside of hull) and cause sudden and agressive change of pressure to second 1 and then that one will colapse and so one...But like i sad usualy it takes miliseconds to happen and usualy boat is splited in 2-3 part(look at images of Trasher and Scorpion wrecks for example).If hull burst before bulkhead then it will be filled with water in seconds and u will be dead before u realise what happened becose your inner pressure is much smaller then outside.Your lungs,heart,stomack will colapse in a splitsecond and u will be dead.
If u were the part of crew u will be sitting in dark,in some unusual upsidedown position all around of u will be that rumbling-creeking nose of hull under pressure and then "snap" in 1 milisecond u r dead..Very fast and very merciful death compared to drawning...

[Myxale]

Must've been a helluva trip!
To bad you didn't make it!

My boat with the "Tonnage Mod" made something like this, but not quite as deep. But hell nevertheless!

I got punded like hell; took heavy damage and fell fast to the endless bottom to 280 and counting and my crew and i tried to stop the boot.
But no; we sunk and sunk. at 330 when i just waited for the end, water everywhere; lights out in the dark and the shouts and darkness and the scream of steel.
Then the wonder, God bless my Virtual LI;
My crew somehow managed get a hold of the intense flooding last minute (second's more like it) and I desperately ordered blow ballast one last time and with the remaining little pressure that was left. And wow; Sweet Jesus! We catched the boot and stopped sinking around 340. :rock:
Intense is not even close.
We made it flank ahead to the save deepth and mamaged to fix our boot to get to the nearest base. The partol ended early! With no praise or Tonnage for us! :hmm:
Thats why i love this game! :rock:
And the Mod! :up:

[Sailor Steve]

What a ride! I've been lucky not to have that experience yet. Glad at least one boat survived it.

[Salvadoreno]

Must've been a helluva trip!
To bad you didn't make it!

My boat with the "Tonnage Mod" made something like this, but not quite as deep. But hell nevertheless!

I got punded like hell; took heavy damage and fell fast to the endless bottom to 280 and counting and my crew and i tried to stop the boot.
But no; we sunk and sunk. at 330 when i just waited for the end, water everywhere; lights out in the dark and the shouts and darkness and the scream of steel.
Then the wonder, God bless my Virtual LI;
My crew somehow managed get a hold of the intense flooding last minute (second's more like it) and I desperately ordered blow ballast one last time and with the remaining little pressure that was left. And wow; Sweet Jesus! We catched the boot and stopped sinking around 340. :rock:
Intense is not even close.
We made it flank ahead to the save deepth and mamaged to fix our boot to get to the nearest base. The partol ended early! With no praise or Tonnage for us! :hmm:
Thats why i love this game! :rock:
And the Mod! :up:

dude what was ur hull integrity?

[HM.Medico]

Must've been a helluva trip!
To bad you didn't make it!

My boat with the "Tonnage Mod" made something like this, but not quite as deep. But hell nevertheless!

I got punded like hell; took heavy damage and fell fast to the endless bottom to 280 and counting and my crew and i tried to stop the boot.
But no; we sunk and sunk. at 330 when i just waited for the end, water everywhere; lights out in the dark and the shouts and darkness and the scream of steel.
Then the wonder, God bless my Virtual LI;
My crew somehow managed get a hold of the intense flooding last minute (second's more like it) and I desperately ordered blow ballast one last time and with the remaining little pressure that was left. And wow; Sweet Jesus! We catched the boot and stopped sinking around 340. :rock:
Intense is not even close.
We made it flank ahead to the save deepth and mamaged to fix our boot to get to the nearest base. The partol ended early! With no praise or Tonnage for us! :hmm:
Thats why i love this game! :rock:
And the Mod! :up:

:rock: Mad Freaking As, I envy all you SHIII players. Must Upgrade
:damn: :damn: :damn:

[Keelbuster]

Most of the subs casualties are by implosion...U see a subs are build strong enought to withsand a lot of presure (btqw cylinder is a geometrical body with very high pressure tolerance)but at greater depths all bulkheads will colapsed all together in miliseconds interval becose of the so called domino effects: they r already well beyond their calculated stress and it is enought to just 1 of them colapse( i assumed that there is 1 or 2 ruptured compartments and that they r flooded so the pressure on the bulkheads are same as outside of hull) and cause sudden and agressive change of pressure to second 1 and then that one will colapse and so one...But like i sad usualy it takes miliseconds to happen and usualy boat is splited in 2-3 part(look at images of Trasher and Scorpion wrecks for example).If hull burst before bulkhead then it will be filled with water in seconds and u will be dead before u realise what happened becose your inner pressure is much smaller then outside.Your lungs,heart,stomack will colapse in a splitsecond and u will be dead.
If u were the part of crew u will be sitting in dark,in some unusual upsidedown position all around of u will be that rumbling-creeking nose of hull under pressure and then "snap" in 1 milisecond u r dead..Very fast and very merciful death compared to drawning...

Thinking about water pressure a great depth - it's mostly a force that works in the vertical direction (i.e. along the axis towards the center of the earth), right? I'm thinking that the boat would likely be crushed vertically rather than horizontally. Or, perhaps, because it is a loose fluid, the pressure is roughly equal on all sides. Think about sand - in sand the pressure would be mostly from above. I bet you there's a pressure gradient (Vertical/horizontal) that depends on the liquid viscosity. They might build pressure hulls with this in mind?

Kb

[GreyOctober]

Most of the subs casualties are by implosion...U see a subs are build strong enought to withsand a lot of presure (btqw cylinder is a geometrical body with very high pressure tolerance)but at greater depths all bulkheads will colapsed all together in miliseconds interval becose of the so called domino effects: they r already well beyond their calculated stress and it is enought to just 1 of them colapse( i assumed that there is 1 or 2 ruptured compartments and that they r flooded so the pressure on the bulkheads are same as outside of hull) and cause sudden and agressive change of pressure to second 1 and then that one will colapse and so one...But like i sad usualy it takes miliseconds to happen and usualy boat is splited in 2-3 part(look at images of Trasher and Scorpion wrecks for example).If hull burst before bulkhead then it will be filled with water in seconds and u will be dead before u realise what happened becose your inner pressure is much smaller then outside.Your lungs,heart,stomack will colapse in a splitsecond and u will be dead.
If u were the part of crew u will be sitting in dark,in some unusual upsidedown position all around of u will be that rumbling-creeking nose of hull under pressure and then "snap" in 1 milisecond u r dead..Very fast and very merciful death compared to drawning...

Thinking about water pressure a great depth - it's mostly a force that works in the vertical direction (i.e. along the axis towards the center of the earth), right? I'm thinking that the boat would likely be crushed vertically rather than horizontally. Or, perhaps, because it is a loose fluid, the pressure is roughly equal on all sides. Think about sand - in sand the pressure would be mostly from above. I bet you there's a pressure gradient (Vertical/horizontal) that depends on the liquid viscosity. They might build pressure hulls with this in mind?

Kb

I beg to differ... The HYDROSTATIC pressure is OMNIDIRECTIONAL, regardless of the objects orientation, size, speed, material etc. It is a force which acts equally on every point on the body (square inch if you have it). Hydrostatic pressure depends on the liquid density (water density is 1g/mililiter) and of course depth.

[Keelbuster]

Most of the subs casualties are by implosion...U see a subs are build strong enought to withsand a lot of presure (btqw cylinder is a geometrical body with very high pressure tolerance)but at greater depths all bulkheads will colapsed all together in miliseconds interval becose of the so called domino effects: they r already well beyond their calculated stress and it is enought to just 1 of them colapse( i assumed that there is 1 or 2 ruptured compartments and that they r flooded so the pressure on the bulkheads are same as outside of hull) and cause sudden and agressive change of pressure to second 1 and then that one will colapse and so one...But like i sad usualy it takes miliseconds to happen and usualy boat is splited in 2-3 part(look at images of Trasher and Scorpion wrecks for example).If hull burst before bulkhead then it will be filled with water in seconds and u will be dead before u realise what happened becose your inner pressure is much smaller then outside.Your lungs,heart,stomack will colapse in a splitsecond and u will be dead.
If u were the part of crew u will be sitting in dark,in some unusual upsidedown position all around of u will be that rumbling-creeking nose of hull under pressure and then "snap" in 1 milisecond u r dead..Very fast and very merciful death compared to drawning...

Thinking about water pressure a great depth - it's mostly a force that works in the vertical direction (i.e. along the axis towards the center of the earth), right? I'm thinking that the boat would likely be crushed vertically rather than horizontally. Or, perhaps, because it is a loose fluid, the pressure is roughly equal on all sides. Think about sand - in sand the pressure would be mostly from above. I bet you there's a pressure gradient (Vertical/horizontal) that depends on the liquid viscosity. They might build pressure hulls with this in mind?

Kb

I beg to differ... The HYDROSTATIC pressure is OMNIDIRECTIONAL, regardless of the objects orientation, size, speed, material etc. It is a force which acts equally on every point on the body (square inch if you have it). Hydrostatic pressure depends on the liquid density (water density is 1g/mililiter) and of course depth.

I thought about that - but since it is driven by the earth's gravitation pull - which is unidirectional, i expect there is a measureable gradient in that direction. It may be omnidirectional as an approximation (a rule of thumb) but wouldn't you expect to see a gradient? What about the sand example - would sand-pressure be omnidirectional? When building a mineshaft they have to support the ceiling more than the walls right? When a mineshaft collapses, the ceiling falls in, I would think.

Now - it may well be easier to build a pressure hull that can stand omnidirectional pressure - (like an eggshell) - building in an assymetry might weaken it overall. Maybs. I'm no engineer though.

Kb

[jumpy]

I should imagine that under the circumstances of sudden and catostrophic implosion, quite a large amount of heat would also be generated in (what was left of) the submarine atmosphere (like you get pumping up a bicycle tire- the pump gets hot) and any crewmembers in said atmosphere would not only be subject to the intense and crushing pressure differential, but a rapid and extreme buildup of heat- a kind of 'compression ignition' of the air in the boat- something which would only last for a fraction of a second, but might actually do it for the crew before them being crushed to death?

I'm guessing some of that is at least possible if not wholely probable in such an event as a submarine implosion... yay discovery channel!

[Keelbuster]

I should imagine that under the circumstances of sudden and catostrophic implosion, quite a large amount of heat would also be generated in (what was left of) the submarine atmosphere (like you get pumping up a bicycle tire- the pump gets hot) and any crewmembers in said atmosphere would not only be subject to the intense and crushing pressure differential, but a rapid and extreme buildup of heat- a kind of 'compression ignition' of the air in the boat- something which would only last for a fraction of a second, but might actually do it for the crew before them being crushed to death?

I'm guessing some of that is at least possible if not wholely probable in such an event as a submarine implosion... yay discovery channel!

I believe it - burn first, then crush, then drown, then be torn apart by fish. Sweird though - in movies with downed subs (i.e. abyss), the bodies are always intact. Chances are they would be pretty mashed.

Kb

[Myxale]

As for those who asked for the Hull- Well, i have it always hidden by the Commander!
I always say better off not knowin'! :rotfl:

[GreyOctober]

I thought about that - but since it is driven by the earth's gravitation pull - which is unidirectional, i expect there is a measureable gradient in that direction. It may be omnidirectional as an approximation (a rule of thumb) but wouldn't you expect to see a gradient? What about the sand example - would sand-pressure be omnidirectional? When building a mineshaft they have to support the ceiling more than the walls right? When a mineshaft collapses, the ceiling falls in, I would think.

Now - it may well be easier to build a pressure hull that can stand omnidirectional pressure - (like an eggshell) - building in an assymetry might weaken it overall. Maybs. I'm no engineer though.

Kb

Yes indeed, water has its own weight but due to its molecullar structure the pessure always exerts forces equally, perpendicullar to the surface of the submerged body. As for the sand example: Sand is not a liquid. It might flow but it has different physics. It becomes a fluid and gains fluid properties once mixed with water. As with the forces acting on a body burried in sand for example, the forces are omnidirectional but NOT equal and indeed the greatest force acting would be gravity.
The object with the best pressure tollerance is a sphere. Some of the modern ocean explorers have pressure hulls in form of a sphere. The cillinder has also a very good pressure tollerance and since WWI they had this shape. Remember that pressure difference occurs between a medium (water) and a cavity with a different pressure. There is no presure difference between water and lets say the external hull of the submarine for example.


I should imagine that under the circumstances of sudden and catostrophic implosion, quite a large amount of heat would also be generated in (what was left of) the submarine atmosphere (like you get pumping up a bicycle tire- the pump gets hot) and any crewmembers in said atmosphere would not only be subject to the intense and crushing pressure differential, but a rapid and extreme buildup of heat- a kind of 'compression ignition' of the air in the boat- something which would only last for a fraction of a second, but might actually do it for the crew before them being crushed to death?

I'm guessing some of that is at least possible if not wholely probable in such an event as a submarine implosion... yay discovery channel!

No. Just a big bubble :D The only heat would be that of the depthcharges.

I believe it - burn first, then crush, then drown, then be torn apart by fish. Sweird though - in movies with downed subs (i.e. abyss), the bodies are always intact. Chances are they would be pretty mashed.

Uhm, severe lung collapse,and one that is filled with water, presure equalizes and there nothing more to happen, untill the body gets sniffed out by a shark :-?

Cheers!

[Keelbuster]

due to its molecullar structure the pessure always exerts forces equally

this answer is vague; it doesn't contain enough information to aid your argument.

Sand is not a liquid. It might flow but it has different physics. It becomes a fluid and gains fluid properties once mixed with water.


sand is approximately liquid - it's a group of particles in close contact - H20 are smaller particles. Sand is an extreme example to show that the direction of earth's pull with induce an asymmetry in 'pressure' that is exerted on the surface of a submerged body. It works for solids too - I have a feeling that's why the depths under earths crust form layers (of MAGMA moohaha). But they don't rule out 'omnidirectional' pressure. Finally, mixing sand with water is not relevant here.

As with the forces acting on a body burried in sand for example, the forces are omnidirectional but NOT equal and indeed the greatest force acting would be gravity.


I think we need to lose the omnidirectional thing. Forces acting on the body in sand would be applied over its entire surface area, as it is in contact with particles on all sides. 'Omnidirectional' is vague. Gravity induces a gradient for an increased vertical force relative to the horizontal plane. Here we agree. But because i don't know why you see such a strong disanalogy between sand and water, i'm not sure why this doesn't convince you that at least _some_ measureable asymmetry in water pressure per surface area would be found associated with the vector that points away from the center of the earth. I'm really sure there is. There has to be. The question is how big it is. You seem to believe that it is negligible.


The object with the best pressure tollerance is a sphere. Some of the modern ocean explorers have pressure hulls in form of a sphere. The cillinder has also a very good pressure tollerance and since WWI they had this shape. Remember that pressure difference occurs between a medium (water) and a cavity with a different pressure. There is no presure difference between water and lets say the external hull of the submarine for example.


this part is fine with me. It's a little aside the main argument. I believe that the sphere is the best form to resist forces from all sides. That is because it is a shape with perfect symmetry. It is _also_ the best form to resist asymmetrical forces. But this is a (direct?) consequence of being optimal in the symmetric situation. Assymetrical forces are a subset of all forces that may be applied (someone please challenge this claim - i'm a little uncertain about it). The same can be said for the cylinder-like form used in the submarine (it is circular with respect to the XZ plane (where X is across the width of the sub and Z is up and down). The circle is optimal for resisting force applied at any point along its circumference, but also, (in?)directly as a consequence of being the best solution to this problem, the circle is also optimal for resisting asymmetrical forces (like earth's gravitational field).

I still disagree with you. You need to convince me that the disanalogy between sand and water is vicious. But even still I'm next to positive that there is an asymmetry in water pressure along the principal axes.

This is fun.

:know:

Kb

[BigBadVuk]

It is not driven by Gravitation of the earth but by density of liquid...To put it in other words by forces between moleculs of liquid to stay together and they r omnidirectional

[GreyOctober]

Mr. Keelbuster youre getting on me nerves ;)

Exhibit A (http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/Pressure/HydroStatic.html), your Honor

http://www.ac.wwu.edu/~vawter/PhysicsNet/Topics/Pressure/PressureGifs/Pressure05.gif

...and

Exhibit B (http://www.school-for-champions.com/science/fluidpressure.htm)
and i quote
Direction of fluid pressure

Now, what is different about pressure caused by a liquid, or gas is that not only is there pressure pushing down at a given point, but there is also the same pressure pushing up and to the sides.
All directions

The pressure is the same in all directions in a fluid at a given point. This is true because of the characteristic of liquids and gases to take the shape of their container.

What this also means that any hollow container submersed in a liquid has pressure on every square inch of its surface, top and bottom.

Exhibit C (http://www.chem4kids.com/files/matter_liquid.html)
Keeping in mind that SAND is a solid:
Another trait of liquids is that they are difficult to compress. When you compress something, you take a certain amount and force it into a smaller space. Solids are very difficult to compress and gases are very easy. Liquids are in the middle but tend to be difficult. When you compress something, you force the atoms closer together. When pressure go up, substances are compressed. Liquids already have their atoms close together, so they are hard to compress. Many shock absorbers in cars compress liquids in tubes.

A special force keeps liquids together. Solids are stuck together and you have to force them apart. Gases bounce everywhere and they try to spread themselves out. Liquids actually want to stick together. There will always be the occasional evaporation where extra energy gets a molecule excited and the molecule leaves the system. Overall, liquids have cohesive (sticky) forces at work that hold the molecules together.
....and because its treated as a solid, sand has different physics

:up:

[Der Eisen-Wal]

what are nuclear subs nowadays good til?

[GreyOctober]

Exact maximum depth information is usually classified, but they can go anywhere between 800 to 1000 feet.

[Khayman]

Exact maximum depth information is usually classified, but they can go anywhere between 800 to 1000 feet.

At least one U-boat went to just over 1000 feet and survived. An extreme case maybe, but if modern Nuclear Subs can't do any better then I'm not impressed. Of course the navies of the world aren't going to release classified information just to impress a wee guy in Scotland :D

[Bilge_Rat]

Here is the story of a US WW2 fleet sub which went down to 1,000 feet and survived.

http://www.geocities.com/jaob/deepdive.htm

The Hull was so damaged by the pressure that the sub was taken out of service. As a Balao class, it had a test depth of 400 feet.

And this is the result of a really deep dive, USS Thresher which during a deep dive in 1963, sank below crush depth and imploded from the pressure.

http://www.history.navy.mil/photos/sh-usn/usnsh-t/ssn593-l.htm

i.e. door:

http://www.history.navy.mil/photos/images/h97000/h97567.jpg

insulation:

http://www.history.navy.mil/photos/images/h97000/h97565.jpg

[Keelbuster]

Bilge_Rat - these links were totally awesome.

[Keelbuster]

I should imagine that under the circumstances of sudden and catostrophic implosion, quite a large amount of heat would also be generated in (what was left of) the submarine atmosphere (like you get pumping up a bicycle tire- the pump gets hot) and any crewmembers in said atmosphere would not only be subject to the intense and crushing pressure differential, but a rapid and extreme buildup of heat- a kind of 'compression ignition' of the air in the boat- something which would only last for a fraction of a second, but might actually do it for the crew before them being crushed to death?

I'm guessing some of that is at least possible if not wholely probable in such an event as a submarine implosion... yay discovery channel!

No. Just a big bubble :D The only heat would be that of the depthcharges.

I believe it - burn first, then crush, then drown, then be torn apart by fish. Sweird though - in movies with downed subs (i.e. abyss), the bodies are always intact. Chances are they would be pretty mashed.

Uhm, severe lung collapse,and one that is filled with water, presure equalizes and there nothing more to happen, untill the body gets sniffed out by a shark :-?

Cheers!

"The Thresher’s hull gave way. Inrushing seawater spiked air pressure, quickly killing the crew. The pressure also ignited the sub’s diesel fuel, causing an explosion that tore the high-tech vessel to pieces."

http://www.americanheritage.com/events/articles/web/20060410-submarine-ultrasound-thresher-nautilus-navy-john-harvey-cold-war-hyman-rickover-trieste.shtml

Oh, they burn.

Kb

[Bilge_Rat]

Bilge_Rat - these links were totally awesome.

Glad you enjoyed it. No one really knows what happened on the Thresher other than what can be deduced from the one garbled message and the wreckage.

The official navy report presumed that a seawater pipe burst because of the pressure ( she was doing a "deep" dive, I think around 1,200 feet ) which would have knocked out power causing her to slowly sink below crush depth, but no one really knows.

The important point is that an implosion from sea pressure will disintegrate a sub, killing the crew instantly, as you can see from the photos.

The story of the Thresher is what first got me interested in submarines when I was a kid, so I have always had a special interest in her.

[BigBadVuk]

what are nuclear subs nowadays good til?

I think that 1 of the recorders was Soviet era class Mike(Komsomoletc if im right)which had titanium hull but i think her max depth was around 600-700m...She was lost in late 80s due to fire in electrical systems...she sank NW from Norvay with around 50 men....some was saved becose she surfaced but in cold water many perished before help was on scene....