So I have 0.0000000007715 % chance to hit him with single torpedo

? Well guys you really know how to cheer up somebody... is there a cure for sonar guy? Some mod? More precise drawing tools?
@ETsd4... how did you get this 0.75 precision, and I was thinking about some "AOB+Bearing= Range" magic formula/drawing in my question...
@makman94 ... I can see the mistake now... nice tutorials btw
Lately I constantly have some error in projected course of a target I don't know how much but it's not bigger than 7-8 degrees (I think...) when a target approaches on it's course sonar guy doesn't reads out "constant distance" as it should... but "closing" until about 35-40 degrees on my scope, then suddenly he changes to "moving away"

. This happens no matter what way of tracking I use... moving... stationary... is this result of cumulative "round up" bearing errors? I'm off-course on the 90 degrees approach to projected course of a target.