[Kaptan Tommy]

I pretty much do the same thing. I head in the general direction and try to catch a glimps of the target before I take to periscope depth. I'm counting on the fact that I'm a much smaller silhouette (especially head on) that whatever it is I'm after and will see them before they see me.

And if it's a small(er) target (small cargo, fishing type boat, etc), and the seas permit, I'll just Bogart on in with the deck gun crew blazing away and sink them that way.