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pinger |
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pinger [′piŋ·ər] (engineering acoustics) A battery-powered, low-energy source for an echo sounder. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The pingers on the black box flight voice and data recorders have enough battery power to last 30 days and there's no real worry about not finding the wreckage, officials said. The pingers on black-boxes do have batteries, but they're activated only after the crash. Another two boats put pingers on nets to warn birds. |
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