Definition: | acoustic device that transmits pings in response to a specific sound signal, with the aim of broadcasting its location in response to the received interrogation Note 1 to entry: Note that the use in underwater acoustics of the words "transmit", "transmitter" and "transmission" to describe the process of sound radiation by a source is commonplace, but this deviates from the usage prescribed in IEV 702-02-05 where the words "emit", "emitter" and "emission" are preferred.
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