What Is a Fish Finder?

Last Updated on July 5, 2020

Fishfinders or trackers are something that anyone who needs to go fishing, or any other container for that matter, should have as a first secondary tool. They are very useful, and you will find that they help a lot in predicting the movement of the fish. But what is a fish finder anyway? It is an electronic device to help locate fish. It makes use of a transducer, which transmits the ultrasonic waves and shows everything that runs on a monitor.

What Is a Fish Finder

These equipment are no more than instruments with sonar technology made to detect underwater fish and have more success in your fishing or just to know what’s down there. It sounds surprising, but it is quite simple since they work through sound: they emit waves at a certain frequency and read all those waves that are reflected, which is transformed into data and graphics that are displayed on the screen of the tracker.

However, a minimum budget fishing tracker does not only serve as a fish detector, since it can also be used as a radar to determine the depth of water in an area, to see debris or even possible dangers. Any object that is detected by the sonar will be seen on the screen as a point or as a series of arcs.

The Types of Sonars

Although modern advances mean that new types of sonar and search engines for more sophisticated and precise fish often arise, we can tell you about the most important varieties nowadays due to their quality, accuracy, and ability to reflect the information correctly in their modern LCD screens.

Single or Double Laser

The common 2D sonars emit cone-shaped sound waves to get a clear view of what’s under the boat. Now, pay attention, because the higher the frequency, the narrower the cone, allowing you to see less fish.

The advantage is that it gives a clearer and more accurate image. On the other hand, if the wave is shorter, it will be wider, and you will have a greater field of vision. With less precision and accuracy but with great coverage to find more fish.

In these fish locators, they will appear on the screen as points, ovals, thin lines or arcs depending on various factors such as the speed of the boat or the fish, or how close they pass to the sonar. Simple lasers can emit waves on a single frequency, limiting you to a single type of coverage, while doubles can emit high and low frequencies.

Sound of Image Down

This variety of sonar sensor uses a transducer that emits the very narrow and high-frequency wave directly down the can and generates a fairly accurate 3D image. While you are navigating and gathering what each of these narrow waves captures, you can have a surprisingly clear picture of what is underwater.

In addition, in general, different brands have their own models that use this type of technology, although there really are not too many differences between each one.

Sound of Image Towards the Sides

We speak of an extremely useful model for fishermen because, unlike the downward image, this type of sonar emits the angled waves a little more upwards and from each side of the boat.

This generates excellent quality images of the seabed that will let you know if there are fish, algae, structures, schools of fish and much more. That’s why they are great at detecting fishing nets and structures quickly so that they can fish more efficiently.


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