Quote:
Originally Posted by tomoose
I thought one of the two dials in the working TDC represented "own ship"? It certainly looks like the same kind of dial as represented in the photo here showing "own ship". My brain hurts.  
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Tomoose, the OP said the TDC had some kind of dial for "ownship position." That doesn't exist. What does exist in the real TDC are output dials for ownship course and speed.
Our TDC in the game reproduces the ownship course dial, but not the ownship speed dial. The ownship speed dial was just the reflection of the automatic input from the sub's knot gauge. To put it into the already crowded game TDC input would be redundant, because you already see the speed on your HUD.
Both of them are incorporated into the game TDC because without them the TDC's PK could not function and the TDC could not compute gyro angle. The OP is wrong, both on his stated observation and on his implied observation. Additionally, he is wrong in his conclusions from the flawed observations. The game TDC is in no way "vague" or difficult to use due to missing essential functions.