Yes, for the smokers it was hard. In a real combat situation, the sub would have never even fully surfaced and only stick out the snorkel.

Haven't posted anything else about my past as a submariner.... If you are interested, here is a clip, where you can see the type. There is quite a bit on u-tube. Sounds funny to look there for u-boot.. just look for "U Boot Klasse 206", they are no longer in service.

Yeah.. K19, very tragic story. When you served on a sub yourself, watching the movie is almost unbearable. You feel with your comrades, no matter what nation...

The satellite navigation was in its very early stages. The navigators had to take a 2 day class, just to be able to turn on that thing. The sub pulled a cable like antenna and we had to be close to the surface for it to work, and it wasn't very precise :-b