11-25-15, 04:52 PM
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#5
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Silent Hunter 
Join Date: Dec 2004
Location: AN9771
Posts: 4,904
Downloads: 304
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Dr.Sid once did some measurements and reported the beginning of shadow zones starting at around 5 nm. But that was with the FFG:
http://www.subsim.com/radioroom/showthread.php?t=117814
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