What was your Crush depth?

[Raf1394]

What was the deepest depth you ever went before being crushed?

I once got attacked by destroyers, there depth charges even managed to reach 230m of depth... I had big leaks, and I went down to the deep like a rock...

I passed over 260m, after that I could not read the depth meter, but one of the crewmembers still announced the depth until 310m, then he also stopped telling what our current depth was. The depth meter kept moving, it even passed the 0m again to 100m then I got crushed.

I actually realized that I went below 410m...

[Dewgle]

So the way the game works..

The moment you dip a toe below 150 meters, you are entering "dangerous depths" where there's a chance of sprouting a leak. The deeper you go below that 150 meter threshold, the higher chance of sprouting a leak.

Crush depth in UBOAT is 300 meters, but just like "dangerous depths", "crush depth" is a threshold and not and instantaneous snap of the fingers = death. The deeper you go below 300 meters, the higher the chance of your boat crushing and giving you the fated game over screen.

I believe the devs set it up this way to give players a chance to save the boat even when that needle goes off the gauge for some exhilarating gameplay.

[Raf1394]

I reached 410m, because the meter kept going after 260m. It "restarted" from 0m, and when it reached 100m, I got the end screen.

But I sank very fast, no way to stop the sinking with those leaks and pressure.. I guess I reached around 400m

[Lord Rizzington of Mewingville]

Originally posted by Rafik1994:

I reached 410m, because the meter kept going after 260m. It "restarted" from 0m, and when it reached 100m, I got the end screen.

But I sank very fast, no way to stop the sinking with those leaks and pressure.. I guess I reached around 400m

I don't really understand physics and stuff, but I'm guessing at a certain depth the atmospheric pressure is too great to blow the tanks/ballasts?

[Raf1394]

Originally posted by jenkem_lover189:

Originally posted by Rafik1994:

I reached 410m, because the meter kept going after 260m. It "restarted" from 0m, and when it reached 100m, I got the end screen.

But I sank very fast, no way to stop the sinking with those leaks and pressure.. I guess I reached around 400m

I don't really understand physics and stuff, but I'm guessing at a certain depth the atmospheric pressure is too great to blow the tanks/ballasts?

I know the pump has no effect below 200m, the water pressure outside is to high.
You can put the pump on, but it will not get the water out.

I think you have the same thing with blowing the ballast tank, maybe you will use more compressed air the deeper you are?

But even if i managed to blow the ballast tanks, it would not help. Because the amount of leaks and water inside the uboat was to much... i still would sink.

[Dewgle]

Some quick physics regarding the ballast tanks and damage control.

The volume of the ballast tanks is around 155m³ (meters cubed). You have enough compressed air inside your high pressure air tanks for three full blows at 1 atmosphere iirc. But that's the key point to remember.

A standard blow will express all 155 cubic meters of water from your ballast tanks when you're near the surface where the external pressure is close to 1 atmosphere. But if you were to perform a standard blow at say 100 meters where the pressure is close to 10atm, you'd only express about one-tenth of the water from your ballast tanks because of the pressure difference.

For every 10 meters below the surface, add approximately 1 atmosphere of pressure.
100 meters = 10atm
200 meters = 20atm

No matter what depth you're at, a standard blow will ONLY pump 155m³ (at 1 atmosphere) into your ballast tanks. Under normal conditions this is fine as all you need is just a little bit of air to get you going towards the surface. And as you ascend the gas inside the ballast tanks will begin to expand as the external pressure decreases until eventually you reach the surface and trapped gas expands, completely expressing the water from your ballast tanks.

However that's not ideal when your boat is flooded with water or you're in an emergency situation. That's where the emergency blow comes in. Not many players are familiar with this function, but it's there none the less.

Right-click on your valves and you will see "blow tanks - emergency" in the pie wheel menu. Clicking that will make your engineer blow ALL of your compressed air reserves into the ballast tanks and the air will not stop blowing until one of two conditions are met.

1) All of the water is expressed from your ballast tanks in which case there's no need to continue blowing air
2) The remaining pressure inside your high pressure air flasks is equal to or less than the external pressure around the boat. Like trying to inflate a tire to 32psi when you only have 30psi left inside the compressed air tank.

So we know the ballast tanks can hold 155 cubic meters of water. When they are flooded, you have achieved neutral buoyancy. But this also means your boat can only hold up to 155m³ of flood water before you're too heavy to save.

Hover your mouse over the water pump located inside the control room to see how much flooding you have on board. If it's greater than 155m³ the boat cannot be saved even if your ballast tanks were 100% empty, as you're simply too heavy to rise at that point.

You already know that the pump is ineffective below 200 meters (20 atmospheres of pressure) but now we take what we've learned about the ballast tanks and atmospheric pressure and we can determine how deep we can go, and how much flood water we can take on before even an emergency blow cannot save us.

I mentioned that the boat has enough air in its high pressure air flasks for three blows, correct? (155m³ * 3 = 465m³ at 1 atm)

Every 10 meters below the surface adds an additional 1 atm of pressure onto the boat meaning at 100 meters 465m³ worth of air will only express around 46m³ of water from your ballast tanks. So if you have more than 46m³ of flood water in your boat at 100 meters? You're kinda boned.

Keep in mind this is all napkin math™ but you get the general idea. The deeper you are, the less flood water you can accrue before your boat becomes doomed to sink. And always begin ascending to shallower depths if you get a leak.

[Raf1394]

McDewgle, thanks for the info.

Again a good example that you need to respect the maximum save depth of 160m.
only dive deeper if you have no other chose. (depth charges)
If you go deeper, always try to get back to 160m as soon as possible.

I always try to stay between 100-160m, if something goes wrong, i have still time and depth to maneuvre.

If something goes wrong and you are at the depth of 220m, its pretty hard to survive.

[El Rushbo]

Speed can help as well, using dive planes to assist. In most of the scenarios above they likely won't be enough to save the boat, but sometimes that tiny amount of assistance may make the difference.

[exit.strategy]

319 m for my boat is always "game over".

[Lord Rizzington of Mewingville]

Originally posted by El Rushbo:

Speed can help as well, using dive planes to assist. In most of the scenarios above they likely won't be enough to save the boat, but sometimes that tiny amount of assistance may make the difference.

Is this possible in third-person view? I'm going to assume that I zoom in on the boat and find the dive plane instruments - which I didn't even know you could do!

I had this already in mind as something I wanted added after seeing the way in which they attempted the same in Das Boot (1983) i.e., using the power of the engine plus dive planes to compensate for the failure of the ballasts, although I seem to recall theirs were damaged and stuck in place. This game has so much to offer and I'm constantly learning.

[Grisen Din]

Today my boat sank, and when i realized there was nothing i could do, i enabled time compression, and that way i managed to sink all the way to 1993m depth, (sea floor was 3000m or something) after reaching 1993-1997m the boat seemed to "jump" back to 1992-1993m as if there was some kind of invisible rubber sea floor.

The way i know how deep i was was because of iron coffins detailed info when hovering the mouse over the buoyancy icon (deck depth).

[alfox]

Originally posted by Rafik1994:

McDewgle, thanks for the info.

Again a good example that you need to respect the maximum save depth of 160m.
only dive deeper if you have no other chose. (depth charges)
If you go deeper, always try to get back to 160m as soon as possible.

I always try to stay between 100-160m, if something goes wrong, i have still time and depth to maneuvre.

If something goes wrong and you are at the depth of 220m, its pretty hard to survive.

got thing to know that usually depth charge damage the sub when the explode under the ship don't know if the simulated that or not but a thing to try

you could try to change depth frequently if the depth charge explode to depth it won't do damage if the explode above you ship same thing

the way that a depth charge damage a submarine is by lifting the sub with an explosion but the pressure of the water will force the ship down that way a well place depth charge can cut a sub in two

[alfox]

Originally posted by Grisen Din:

Today my boat sank, and when i realized there was nothing i could do, i enabled time compression, and that way i managed to sink all the way to 1993m depth, (sea floor was 3000m or something) after reaching 1993-1997m the boat seemed to "jump" back to 1992-1993m as if there was some kind of invisible rubber sea floor.

The way i know how deep i was was because of iron coffins detailed info when hovering the mouse over the buoyancy icon (deck depth).

the time compresion can cause lag and bug that is how you where able to sink at that depth

[Raf1394]

Originally posted by al:

Originally posted by Grisen Din:

Today my boat sank, and when i realized there was nothing i could do, i enabled time compression, and that way i managed to sink all the way to 1993m depth, (sea floor was 3000m or something) after reaching 1993-1997m the boat seemed to "jump" back to 1992-1993m as if there was some kind of invisible rubber sea floor.

The way i know how deep i was was because of iron coffins detailed info when hovering the mouse over the buoyancy icon (deck depth).

the time compresion can cause lag and bug that is how you where able to sink at that depth

Its also possible that half of the boat is full with water for example, hull has broken because of the pressure, but pressure inside the boat is the same as outside the boat.

I had it too. Only the conning tower was not filled with water and i also sank to a depth like that.

Crush depth only has effect on something that is filled with air and has a different pressure then outside,

[EmotionallyBroken]

https://steamcommunity.com/sharedfiles/filedetails/?id=2426223295

[wolf310ii]

Originally posted by al:

got thing to know that usually depth charge damage the sub when the explode under the ship don't know if the simulated that or not but a thing to try

Depth charges needed to be so close to the boat to sink it (less than 6m), it doesnt matter if the DC is above or below the boat, its the shockwave not the "air bubble" that rips an u-boat in half.
Whats true for ships and torpedos is not exactly the same for u-boats and depth charges.
In the depth the bubble is much smaller than close to the surface, also ships are more wide than u-boats.