Dark Waters, submarine school, convoy attack.
I find the convoy in many different ways. That is, on my attack map.
Map updates allow me to see how the convoy is sailing and thus predict where it will be. I have set myself up in different ways. One time it almost has to sail over me, another time I'm lurking close by, waiting. Mind you, I see that on the attack map!
In reality through the periscope I never see anything!! Never one ship, never a convoy..
At one point, when I got sick of never seeing anything, I gave the order to surface, but even then I see nothing!!
What the hell am I doing wrong????