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