I thank for answer.
* You is right TorpX “Real-life crews usually had to do this anyway, as the stadimeter was limited in it's accuracy.” Therefore only some torpedoes hit...
That is near rough sea, as in life - work,work,work. It lets however effect.
*
http://www.valoratsea.com/notdc.htm - Very interesting material. I wanted always to know as they did this really. Without TDC and calculator.
Teed