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What was the name of this secret submarine from WWII?
What was the name of the submarine which was covered with special rubber-like material, arranged in special patterns to absorb SONAR waves. For the time it was a (secret) revolution; during the WWII this subamarine remained cloaked in the european north sea and sank many boats. It was only recently that the technical stuff about its conception and its position was made public.
To sum up: What was the name of this invisible submarine from WWII which did a great job cloaked in the european north sea?
Answer found : U-480.
I think it was Red October
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