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    • While a conventional fish finder can only detect schools of fish directly under the ship, the scanning sonar is an acoustic device that instantly detects schools of fish in all directions by transmitting ultrasonic waves around the entire perimeter of the ship. The detection range can be adjusted to the entire circumference of the ship's bottom by changing the angle (depression angle) of the display section. By detecting schools of fish in the distance and tracking of them in the ocean, you can efficiently catch fish.

    • スキャニングソナー

      Figure 11 Scanning sonar detection range and echo display

      俯角: depression