HI derstosstrupp,
this is an extract from our TDC-manual, which will be published soon.
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In the second scenario we follow the target ship on a parallel course. ‘We plan to attack the target from a specific direction. We have chosen a parallel attack with the target bearing 270 degrees.
There comes a moment when we are 100% sure that the AOB of the target ship is 90 degrees. We enter these values into the TDC and click with LMC on the own course to set the initial (current) U-boat course.
Then activate "Follow AOB" and deactivate "Follow target bearing" in the TDC. The bearing is set to 270 degrees.
Due to certain conditions, e.g. water currents, manoeuvring, etc. the boat changes course twice again e.g. 15 degrees to the right.
However, we do not change our opinion about the 270-degree bearing attack! ‘
To avoid having to update the AOB, which we are no longer sure about.
Since the boat was manoeuvred and changed course, we use the scale "own course ". Whenever the boat changes course, the TDC automatically adds the value of the course angle (= course change) of the AOB to the target ship.
And even if the course was changed several times in relation to the target ship, we still have the correct value of the AOB.
We wait for the target ship to reach a bearing of 270 degrees and fire!
In German this dial is called "Skala Kurswinkel" (eigener Kurs)
To activate the dial you have to click on it with LMC. After that the course deviations are taken into account by the AOB.
The U-boat turns to the right, AOB + course change
The U-boat turns to the left, AOB – course change
Cheers Ruby