Shooting laser beams at a submarine won't destroy it, but new technology being tested by the U.S. Navy could help find enemy subs.
"Instead of dumping hardware (into the ocean) you could shoot a light pulse into the water and generate acoustic signals," said Ted Jones of the Naval Research Laboratory, who presented his results at a recent meeting of the Acoustical Society of America.
"With this, you could do communications, acoustic navigation beacons or sonar."
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