I'm not very good at operating the TDC. So I make very simplistic, "90 degree" attacks. In this way, range does not matter.
I approach the convoy at a 90 degree angle, and then set my AoB in the TDC to be 90 degrees starboard or port, depending on whether my submarine is to the starboard or port of the target(s). Then dial up the target speed in the TDC. Rotate the scope/uzo until the gyroangle is 0 degrees. This should be 10-15 degrees to the left or right of your current heading, depending on whether the targets are coming in from the left or right of you.
Now just sit or drive towards the target, continuing your 90 degree intercept.
As the center of the target crosses the vertical reticule, fire your torpedo. If your target speed entry is accurate enough, you can actually fire at different parts of the ship as they pass through the vertical reticule.
Then just wait for another ship to cross your reticule. In this way, you can attack multiple targets without adjusting the TDC input.
You can repeat this exercise until an escort chases you away.
Range to target does not matter.
Steve
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