That's not doctrine related.
The torpedo feedback is a single yes or no variable in the database for each torpedo.
In order to enable feedback, use DWedit and go to the ADCAP in the object dialogue and in the verticle row of check boxes to the right of the screen, check feedback and you are good to go. Be sure to hit apply on the object screen and then save on the file menu for DWedit before closing the editor.
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LW
 
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