Word: jammers
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Dates: during 1960-1969
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...portable fuse jammer, details of which are still classified, offers protection by sending out electronic signals that cause artillery shells containing proximity fuses to explode prematurely...
...trick works. The moth's sounds may convey the message that the sender is not good to eat, or in some way they may deceive the bat's echo-location system. Whatever the moth clicks do, they are as effective as any man-made radar jammer...