The TDC shows actual distance to target!
Checking the distance lets you choose the correct torpedo and speedsetting to hit the target. A target in 5400 meters distance at 90 AOB can't be hit with a G7e or a fast G7a.
And the constant update function shows - under certain circumstances - the target is travelling out of range when turning the periscope to AOA.
In close combat the distance setting is completely irrelevant.
For the FAT and LUT inicial turning point you'll have to calculate the travelling distance by youself and put it into the individual torpedo data setting above the tube indicator.
Hehe: now tell me - the turning point halves the laddern pattern (i.e. 800m) and makes the torpedo run 400 meters "on both sides" of the turning point? Or does it turn and starts to run 800 meters until it comes back?
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