I guess i'm going to try and stick to firing torps as close as I can, I just did a test fire at two ships in a convoy in my campaign, one of them being at about 1700mtrs away, according to the ruler I used to measure the distance anyway. Torpedos missed on both targets. Naturally I'm going to reload to before firing the torps and "discount" what happend
But i'm not 100% convinced on the "multi target" firing explained in the manual. Do you need to relock your periscope onto the 2nd target for the AOB to be auto updated?? Or does it do it automatically when you swing the periscope round? Because after i've input all my data into the TDC manually, I switch it back to "auto" so that it essentially "tracks" the target and updates the solution accordingly.
In convoy training mission, I have yet to successfully hit a 2nd target. I always hit the first, but never the 2nd