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Old 07-26-2020, 03:13 PM   #14
stellaferox
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Thanks for this post. I don't know if this was the case in the beginning after the war. Anyway if you read up on how Scheppke could be sunk and Kretschmer was invisible on the surface until the dive alarm was (falsely) given. Then he showed up on ASDIC. Read the numbers in there somewhere.
Anyway ASDIC didn't work on surfaced U-boats of at periscope depth.
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