Question

Depth of water is measured by using

• A. Echo sounding
• B. Diffraction
• C. Refraction
• D. Reflection

Answer 1

Answer: (A)

Echo sounding

Echo sounding is a type of SONAR used to determine the depth of water by transmitting sound pulses into water. The time interval between emission and return of a pulse is recorded, which is used to determine the depth of water along with the speed of sound in water at the time. This information is then typically used for navigation purposes or in order to obtain depths for charting purposes.