Most of the fish finders that are now available in the market rely on the same Sonar technology that was being used by troops in WWII. An easy way of understanding how these devices are capable of showing you data regarding fish, rocks, and pretty much everything that you might find underwater is by realizing that they emit sound waves. Once the signal has been let out, it keeps going through different layers of water until it stumbles upon an obstacle and then bounces back to the main unit. If the product doesn’t find a fish or anything else, it will keep going until it reaches the bottom of the water and then it will transmit the information accordingly, mainly by letting you know that there’s nothing to catch in that area.

Fish finders explained

The cone angle of a fish finder depends on the number of sonar beams that it can emit. The higher the number of sonar beams, the higher the chance you’re able to visualize greater detail as well as a larger area. The coverage area of most models out there ranges from 20 degrees to 110 degrees.

One of the crucial things that a fish finder user must come to realize is that the accuracy of the device largely depends on a series of factors. For example, if you do your fishing in deep, murky waters, you might have poorer results than if you were to fish in clear water. Besides, the accuracy of the transducer should be taken into account before choosing one product over the next. Transducers have a number of features that are most important for fishermen, such as frequency, cone angle, and depth capability.

If you were to ask yourself whether a 50 kHz fish finder is better or worse than a 200 kHz one, you might find that it’s actually difficult to give a straight answer. Transducers with a lower frequency are excellent choices for people who want to fish in deep waters, in spite of the fact that the amount of detail seen by the user might not be the best. By contrast, transducers with a higher frequency have a rather limited capability when it comes to providing in-depth readings, but they offer incredible detail. In other words, you ought to think about the areas where you plan to go fishing before buying a certain unit.

Based on the sonar technology that we’ve mentioned at the beginning of the article and thanks to the pressure and temperature sensitivity capability of the device, fish finders can do a great job of displaying the bottom structure and the fish that might be found under your boat. While the data representation mainly depends on the model and LCD you might have on your hands, in most cases, fish are depicted as small arches that come up on a graph that tells you the surface and depth where the target is located as well as the time it takes for the unit to provide the readings. As such, the speed of a fish finder also plays a significant role in your fishing success.


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