Question

what the ship ultrasound

Answer 1

Sonar. Sonar is used on ships and submarines to detect fish or the sea bed. A pulse of ultrasound is sent out from the ship. It bounces off the seabed or shoal of fish and the echo is detected.

Answer 2

It sends ultrasonic sound waves to sea bed and a transmitter down there recieves those waves and send back....
This device is called. SONAR.