Reading through those TDC manual pdfs I found out what the "target length" dial is for. The TDC allows for direct input of sound bearing (which is 0.5° accurate in the real thing at the proper filter frequency or better) and using the range, AOB, and half the target length, will correct the sound bearing into the equivalent visual bearing on center of target.
I'm curious about developing a quick and dirty method of converting sound bearing to visual bearing for sonar PK checking and even more accurate sonar targeting.
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