Answer :
Sonar.
By using sound waves, _______ signals allow oceanographers to determine ocean depth.
Sonar is a device that uses long, medium or short sound waves for navigation, communication, detection, positioning, tracking, and classification of mobile and immobile objects submerged, located on the surface of the liquid or in the air.
By using sound waves, _______ signals allow oceanographers to determine ocean depth.
Sonar is a device that uses long, medium or short sound waves for navigation, communication, detection, positioning, tracking, and classification of mobile and immobile objects submerged, located on the surface of the liquid or in the air.
