There's a limit, of course. Then the hull of the submarine will cave in under the water pressure.
They still believe in the Führer. (Hitler)
(From the bar scene at the opening of the film; said in conversation between Thomsen and the Captain. The implication is that neither of them believe in Hitler anymore.)
Nothing but big-mouthed blowhards, the whole bunch of them.
(Said by the Captain as he listens to an official propaganda speech from Berlin about Churchill; he is referring to the Nazi propagandists.)
Too far away!
He's spotted a convoy!
That's no freighter!
Not exactly victory bulletins, are they?
Begin attack!
Quiet
Reinforcements!
Quiet, men. Keep it quiet.
The water has to go!
Mold is good for you!
Let's get going; we'll get started; it's underway.
Dead slow. Minimum RPMs.
The bolts! They're bursting!
I'm sorry.
(Herr Kaleun to Lt. Werner)
Seven miles from coast to coast.
A bit narrow, I'd say.(reference to the Strait of Gibraltar)