SONAR

The video tutorial explains how fishing boats and submarines use sonar technology to locate fish and navigate the ocean. Sonar, which stands for sound navigation and ranging, uses sound waves to detect objects underwater. It consists of a transmitter and a receiver, and operates on the principle of echo ranging. Sonar uses ultrasound frequencies, which are above 20,000 Hertz, to avoid interference from other sounds. The tutorial also covers how sonar calculates the depth of the ocean floor by measuring the time it takes for sound waves to travel to the ocean floor and back, using the speed of sound in water.

What technology do fishing boats use to locate fish?

• Radar

• Sonar

• Lidar

• GPS

What are the main components of a sonar system?

• Camera and Sensor

• Microphone and Speaker

• Transmitter and Receiver

• Antenna and Receiver

Why does sonar use ultrasound frequencies instead of audible ones?

• Ultrasound is cheaper to produce

• Ultrasound travels faster

• Ultrasound frequencies are distinct and not produced by other sources

• Ultrasound is less harmful to marine life

How does sonar determine the presence of fish schools?

• By using light waves to illuminate the fish

• By detecting changes in water temperature

• By analyzing the reflection of sound waves from fish schools

• By measuring the speed of sound in water

What is the first step in calculating the ocean floor depth using sonar?

• Measuring the water temperature

• Calculating the speed of sound in air

• Measuring the time taken for sound waves to return

• Using a GPS to find the location