Greetings everyone, I am fairly new to the U-Boat/Atlantic scene, I got into this series from SH4. Really like it so far perhaps more than SH4

. At the moment I only have GWX installed and I've spent about 34 hours in-game.
Now obviously attacking with U-Boats is very different from Fleet Boats and I'd like to know how you guys attack convoys in this game or at least the standard way of doing so. I have no clue how, I've encountered 3 convoys so far and what I normally do is just get the convoy's speed, pick off a target, get the data and fire a full salvo. I usually hit the one I aimed for but I can't say the same for the rest of my fishes.
Anyways, I've been looking at videos on YouTube however I can't find any decent ones. Most of the videos I've encountered use Automatic Targeting.
Any tips would be appreciated. Thanks.