Quote:
Originally Posted by Sailor Steve
You can only ping for range if you have active sonar. U-boats certainly didn't have it in 1939. I'm not sure when they got it, but until then they couldn't ping a target's range. And by the time they had it there were plenty of escorts listening in.
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The VIIC was originally designed to have active sonar (S-Gerät), but it wasn't ready at the time. IIRC it only came into use with the Type XXI.