transmitter transmitteran instrument that sends out slectrical signalsRelated Articles: Glossary: acoustic fish tagGlossary: sonobuoyHow is sound used to navigate underwater?How is sound used to find submarines?Acoustic ReleaseAcoustic Fish TagsHow is sound used to measure water depth?Surveillance Towed Array Sensor System Low Frequency Active (SURTASS LFA) Sonar TechnologySonobuoysHow is sound used to monitor and defend harbors? Chris Knowlton2017-02-26T20:10:02-05:00