Thanks for your replies, Gentleman.
But cause of my broken english you maybe got me wrong.
I wasn´t talking about flooding caused by damage to the sub and
it´s clear to me that the sub sinks deeper when you have taken too much water.
A ww2 sub (and i think modern subs too) does take water when running underwater. No enemy presence is needed for that.
it´s only a little, but it gets worser how deeper you are. There are several spots where the water does come in. In german they are called "Außenbordverschlüsse", don´t know how to translate, sorry.
This water has to pumped out of the sub. Not immediately, but if you don´t run the pumps for several hours your boat gets heavier and heavier.
Means you have to turn on the pumps for some minutes to pump it out. I read the pumps did make a terrible noise...
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