Question

Who among the following are associated with SONAR $?$
(A) Sonograph
(B) Engineers
(C) Astronauts
(D) Navigators

Answer 1

Hint : SONAR stands for Sound Navigation and ranging. From the name we can understand it has some association with navigation. SONAR is a technique that uses ultrasound waves to find out the distance of an object from the transmitter or to get a clear picture of the path.

Complete Step By Step Answer:
SONAR works on the principle of echoes. A strong and short (ultrasonic) sound signal is sent towards the bottom of the ocean. The echo of this signal is then detected by it.
A navigator is a person on board a ship or aircraft responsible for its navigation. Since SONAR is a technique that uses sound propagation to navigate. So, SONAR is associated with navigators. SONAR is used to locate underwater objects such as submarines. SONAR is also used in marine vessels. It has many advantages in the maritime world from mapping the seafloor to exploring shipwrecks.
So, the correct option is D. Navigators.

Note :
Note that active sonar testing works like an echo repeater, i.e., it will return an echo for received sonar pulses in the water, while passive sonar testing simply emits sound or noise in the water. Ultrasonic waves have higher frequency than normal sound waves.