Later in the war I believe that some larger freighters do have some sort of active sonar detection capability. I had them start zig zagging after using active sonar. Don't remember which mods I had at the time but no doubt one of the TMO mods. Also noticed that they also reacted to my boat if I got careless about speed and not having silent running on. Not very common but it did happen.
Magic
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Reported lost 11 Feb. 1942
Signature by depthtok33l
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