Silent running does not actually mean you are literally silent, it just means that the only source of noise your boat is producing is from engines and screws since the noise of crew moving, taking, torpedoes being moved around, repairs etc is elliminated.
If you want to move undetected and you think the escorts are close then limit yourself to 2 knots max. This is because cavitaion increased significantly at 3 knots or more making you too noisy.
One think to remember when doing TDC calculations (especially automatic) is that when you have all the data on the notepad (range, AOB, speed) you must press the tick again, this will sent the data to the TDC which will find the solution. You will know it (the TDC) has made the calculation because the Gyro angle below the notepad will change. Look at the gyro solution and ask yourself if it makes sense. Torpedo doors will only screw you up at ultra close range or against very fast movers.
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