No, you seem to be just doing a guess (if you wonder: 0 bearing and 0 AOB is the target closing head on) and updating it based on observed bearing errors. If you manage to keep the TDC torpedo path plot aligned with the hydrophone sound line for a long enough time, you've got an accurate solution. SH3 just shows it in alot more graphical way than it was in reality ofcourse. But it is in principle correct.
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