[TorpX]

What I've done in the past is either cut into the target's track and count on my narrow profile to keep me hidden, or come in on the surface, but submerge before I get too close. In the former case I would not turn away until the torps hit or just before, lest the target see me and evades the attack. (Ships are really way too maneuverable in this game.)

However, I haven't really made enough attacks to have a "standard" proceedure.