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Published online 25 March 2004 | Nature | doi:10.1038/news040322-10
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Buoy sounds out smugglers
Underwater sentinels could snitch on drug runners.
Canadianscientists have developed a 'stealth buoy' that could be used to track drug boats or monitor the migration of animals such as whales and dolphins.
The buoy sits on the sea-bed until triggered by the sound of a passing ship or animal.
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