Yet another Decks Awash thread...

[Chasedtuna9]

So, a couple things that are bothering me right now with this feature.
One would presume that when decks awash, you can use the diesel engines, and this is true in most cases, however, it requires a bit of coaxing on relatively calm seas, and is near impossible in actual calm seas via porpoising, often requiring full ballast blow and re submerging to DA.
Personal opinion, the threshold needs to be lowered a bit along the conning tower. i feel it should float for the most part like normal, just lower in the water, OR sit like it is at periscope depth with the heavy waves over the tower with no one on it, but still able to run the diesels regardless of the waves....
the current snorkel effect is fine afaiac, why not apply it to the diesel vents on the tower?

Also Depth keeping station should be available as i would think that holding decks awash would be just as tedious as holding periscope depth....

I am open to anyone else's thoughts, positive or negative.

[chksix]

+1

[Xealot]

After some searching i found out that this is a quite requested feature. It would add great immersion on night raids. are devs aware of this? if not, how can we inform them?

[garytwinem]

@Xealot: There's an option for Suggestions when you press the F11 bug report key.

[wolf310ii]

Originally posted by Chasedtuna9:

...with the heavy waves over the tower with no one on it, but still able to run the diesels regardless of the waves....

The normal air intake has no automatic valve like the snorkel, with heavy waves rolling over the coning tower, the boat would be able to run on diesel at deck awash, but would also take a lot of water (U-Hai a Typ XXIII sunk 1966 because of something like that in a storm, the snorkel was not correct sealed and large amount of water came unnoticed in the boat until is was to late)

Look at this blueprint:
https://drawingdatabase.com/wp-content/uploads/2015/04/german-submarine-vii-d.gif

Its a Typ VII D, but the VII C has the same air intake.
The tube below the AA-Gun is the air intake

[themanwithgreatpants]

deck awash goes to diesel no problem at x1600. try it.

[Sho]

Originally posted by wolf310ii:

Originally posted by Chasedtuna9:

...with the heavy waves over the tower with no one on it, but still able to run the diesels regardless of the waves....

Look at this blueprint:
https://drawingdatabase.com/wp-content/uploads/2015/04/german-submarine-vii-d.gif

Its a Typ VII D, but the VII C has the same air intake.
The tube below the AA-Gun is the air intake

Even more visible on: https://images-na.ssl-images-amazon.com/images/I/915gv7JfuML.jpg :-)

[Dewgle]

Full disclosure. Decks awash wasn't a thing, per the accounts of surviving U-boat crewmen. The boat becomes very unstable when near the surface with flooded ballasts.

The true origin of decks awash comes from when the U-boat would try to surface. They would blow just enough water from the main ballast tanks to give them the positive buoyancy they needed to get the conning tower above the waves.

Once that was done, they would then start the diesels and turn some valves to redirect the flow of exhaust from the diesels motors through each of the ballast tanks. The exhaust pressure would push the rest of the water out of the ballast tanks allowing the U-boat to fully surface while saving compressed air and coat the interiors of the tanks with diesel soot-oil, preventing rust and prolonging the lifespan of the ballast tanks between maintenance intervals.


--That aside, I get it, it's a game. I too would like to see the devs fix this issue as it does come in handy on a few occasions. I was being hounded by destroyers and I was running low on breathable air. If I had ordered the boat to surface, I would surely have been killed in the time it would have taken to re-flood the ballasts. And it would have cost me precious compressed air that I could not afford to replenish.

Instead I went decks awash which (while barely working) gave me enough breathable air so I could dive away from the surface and begin evading again.

I would also like to see the devs implement the system I just described. Using the diesels to express the ballast tanks to save on compressed air. Additionally, using the bilge pump should also cost compressed air as the bilge water being displaced has to be replaced with something or pressure inside the hull would decrease and risk imploding.

[Xealot]

Originally posted by McDewgle:

Full disclosure. Decks awash wasn't a thing, per the accounts of surviving U-boat crewmen. The boat becomes very unstable when near the surface with flooded ballasts.

The true origin of decks awash comes from when the U-boat would try to surface. They would blow just enough water from the main ballast tanks to give them the positive buoyancy they needed to get the conning tower above the waves.

Once that was done, they would then start the diesels and turn some valves to redirect the flow of exhaust from the diesels motors through each of the ballast tanks. The exhaust pressure would push the rest of the water out of the ballast tanks allowing the U-boat to fully surface while saving compressed air and coat the interiors of the tanks with diesel soot-oil, preventing rust and prolonging the lifespan of the ballast tanks between maintenance intervals.


--That aside, I get it, it's a game. I too would like to see the devs fix this issue as it does come in handy on a few occasions. I was being hounded by destroyers and I was running low on breathable air. If I had ordered the boat to surface, I would surely have been killed in the time it would have taken to re-flood the ballasts. And it would have cost me precious compressed air that I could not afford to replenish.

Instead I went decks awash which (while barely working) gave me enough breathable air so I could dive away from the surface and begin evading again.

I would also like to see the devs implement the system I just described. Using the diesels to express the ballast tanks to save on compressed air. Additionally, using the bilge pump should also cost compressed air as the bilge water being displaced has to be replaced with something or pressure inside the hull would decrease and risk imploding.

It would be pretty cool to see that implemented. Nice research btw

[wolf310ii]

Originally posted by McDewgle:

The true origin of decks awash comes from when the U-boat would try to surface. They would blow just enough water from the main ballast tanks to give them the positive buoyancy they needed to get the conning tower above the waves.

That has not really to do with deck awash.
They blow the ballast tanks 2/3 or 3/4 with air and on the surface blow the rest with diesel.

Deck awash was rarely used at attacks or sneaking into a harbour, at calm seas, to reduce the siluette, not to travel to the operation area, like most player wants to use it.

Additionally, using the bilge pump should also cost compressed air as the bilge water being displaced has to be replaced with something or pressure inside the hull would decrease and risk imploding.

That woud only be a problem if you take lots of water on the surface and then dive.
Submerged the air stays in the boat and the pressure rises if you take water, if you pump the water out, the pressure normalizes.

More important would be the oxygen system.
They could stay submerged up to 3 days, but only once, then the oxygen bottles are empty and they are unable to refill them at sea.