In 2001, what common electronic device did British engineers use to locate an in-flight American stealth bomber?

In 2001, what common electronic device did British engineers use to locate an in-flight American stealth bomber?
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1 Answer

Answer :

http://web.mit.edu/airlines/www/archives/articles/prof-hansman-quoted.pdf Did I read this correctly? Was it cell phone technology? They refer to it as a passive radar system in the link I site above. I wonder if that has anything to do with the reason why you can’t use your cell phone on a commercial flight?
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