The scope was not linked in any way to the TDC, an in SH4 there is no "target bearing imdicator dial". An actual TDC generated a solution based off of what we input; speed-range-AOB...thats it. You "match" generated bearing from TDC with actual bearings on an observation, this "checks" the solution. The only indication that we get is torpedo gyro angle, and quite frankly thats not useful except to shoot when gyros are or close to zero for max accuracy.
Frank