The fish finder helps detect the school of fish and provides various underwater information, such as water depth, fish school distribution and sea floor condition by sending ultrasonic waves to the sea and receiving their reflection. Part of the transmitted sound or ultrasound waves is reflected back to the source when they strike an object (e.g. a school of fish or the sea floor). The fish finder uses ultrasound reflection.
The ultrasonic waves from the fish finder are transmitted directly below the boat. If they hit a school of fish, the very weak reflections will return to where the ultrasonic waves were originally sent. The reflection received is converted into an electrical signal which is then sent to the receiving circuit of the fish finder. The receiver circuit amplifies weak signals, and the processor unit processes them to generate images that will be displayed on the screen. As a result, the image will be displayed on a color LCD display. Stronger reflections appear orange or red, while weaker reflections appear green or blue on the display. A school of high-density fish or rocks on the sea floor returns stronger signals and appears reddish, while a school of low-density fish or small fish appears bluish. The color display can clearly show the sea condition.
The fish finder consists of two parts: the main unit (with display) and the power transformer. The main unit should be located in an easily accessible place in the cabin, wheelhouse, etc. The transducer must be mounted to the bottom of the boat either through the hull or mounted within the hull. Please keep in mind that the performance of a fish finder is largely dependent on whether the transducer is properly installed at the bottom of the boat. Incorrectly installing the transducer may result in failure to capture reflected waves or other serious defects. To avoid these problems, you should consult a technical distributor on how to install the power adapter correctly before the actual installation.
Overview of how a Fish Finder Works
The fish finder transmits ultrasound waves from a transducer mounted at the bottom of the boat. The transmitted ultrasound proceeds straight down towards the sea floor, but if there is an object, such as a school of fish or rocks, it will be reflected. Part of it will be reflected back to the bottom of the ship, which will then be captured by the transducer. By measuring the time elapsed between sending and receiving the ultrasound, the depth of the fish school will be calculated.
If you are looking for the affordable fish finders for your next fishing journey, you can visit CKW Store.
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