yea, the target ship speed is estimated so a close range shot will have a higher hit ratio than a long distance shot. After hitting the first target any follow up shots will be harder as the other ships will scatter change speed, change course etc. As to my first post all the calculations I have done were estimated, (based on more than 1 ship in a convoy) as any follow up shots would be very hard if not impossible to properly calculate as by the time you have properly calculated the speed and distance the chances are the ship would have left the range of the calculation either in again changing speed and/or altering course making the calculation invalid. Setting up an estimated shot will give a better hit ratio at a close range. Dont forget while submerged the max speed will be alot slower than any surface contact, and will have a chance to out run you, a quick firing solution and full volley should make max damage with what you have available before having to make a long slow reload. (in other words in and out as quick as possible lol).
Im no way an expert on a full proper firing setup, I still don`t understand the mechanics around it, its only after the last few weeks I decided to try something different, which for me works though still needs a bit of polishing off lol.
I would love to add a video on what im doing but dont have anyway to do one nor have a camera
sorry.