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单词 sonar buoy
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sonar buoy
sonar buoy n. (originally) a floating device equipped to detect underwater sounds and relay them by radio; (later usually) such a device which emits sonar signals to detect submarines or other underwater objects and which is able to transmit their position; cf. sonobuoy n.
ΚΠ
1946 Somerset (Pa.) Daily Amer. 7 Mar. 6/2 The navy also has sonar buoys audible 20 miles.
1954 Barron's 25 Oct. 17/3 The Navy also has sonar buoys which, when dropped into the water, give automatic radio broadcasts of submarine positions.
1992 J. Hamilton-Paterson Seven-tenths i. i. 21 Somebody else will come along on a [mineral] sampling trip to see what the quality's like and they'll want to be able to arrive at the precise point and drop a sonar buoy.
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