Question

question 8 of 17
what is the technology that boats use to measure the depth of the ocean?
resonance
sonar
radar
doppler

Explanation:

Resonance is a vibrational phenomenon, radar uses radio waves (not effective through water well), and Doppler measures velocity shifts. SONAR (Sound Navigation and Ranging) uses sound waves to calculate ocean depth by measuring the time it takes for sound pulses to travel to the seabed and back.

Answer:

B. SONAR