How to Use A Fish Finder – Best Guide for Beginners [2022]

Have you ever waited for hours with the goal of catching fish, only to come home empty-handed or with a very small number of fish to show for your efforts? Or have you ever caught fish despite waiting for hours? It’s probably because you’ve been casting your line in the wrong places, where there are either no fish at all or very few fish at all. If you want to catch fish, you need to cast your line in the right places.

So, in order to enhance the amount of fish you reel in during each fishing excursion, what are some of the things you can do? It would be wise for you to make an investment in a fish finder that not only helps you catch more fish but also directs you to the fishing places that are the most fruitful overall.

What is a fish finder?

The equipment that is often referred to as a fish finder makes use of sonar technology, which enables it to identify fish of varied sizes. With the aid of this tool, which was developed for both inexperienced and experienced anglers alike, you will be able to determine not only the location of fish in the water but also the depth to which the water extends.

You may put this useful equipment to good use whether you go fishing in the ocean, rivers, or lakes – essentially any body of water in which there is a possibility that fish are lurking.

A fish detector is an item that is particularly well-suited for a wide variety of fishing, including fishing from a kayak, fishing on ice, and fishing in bays, amongst other types of fishing.

In the past, stores that specialised in fishing equipment in North America, Europe, and certain Asian countries offered clients with this gear at prices that were regarded to be somewhat exorbitantly priced. These retailers delivered their services at a loss.

In Western Europe, a fish finder with a liquid crystal display screen (LCD) and a suitable resolution could be obtained for a price that was regarded to be on the higher end of the pricing spectrum around fifteen years ago.

Even while starting fisherman may be able to afford to buy a fishing boat, it is easy to see why they would be hesitant to borrow a fish-finder from a shop given how prohibitively expensive these devices are.

Recently, for the same amount of money, you can purchase not only a fish finder that is just as good as those used by professional anglers, complete with a colour screen and a variety of functions, but also other helpful tools, such as GPS navigation devices, for your fishing trip. This is a significant improvement from the past, when you could only purchase a fish finder that was just as good as those used by professional anglers. This is something that just occurred recently.

If the main purpose for which you want a fish finder is to make the fish and the bottom of the water visible, the cost of such a gadget is now fifteen times cheaper than what it was in the past.

Basic configuration

The display, the transducer, and the power supply are the three primary elements that come together to form a fish finder. These elements make up the gadget as a whole.


The display and button configuration of this section of a fish finder constitute the device’s central processing unit (CPU). The image that is commonly shown on the screen depicts the water level, the bottom, and schools of fish in between the two.

The data that is received by the fish finder as well as the settings that are used will each have an impact on the shape, distribution, concentration, and colour of each of the characteristics that are shown on the screen. This is because the fish finder is always adapting to its environment.

The buttons provide users the ability to make modifications to the operations of the fish finder, as well as how it exhibits information or images on the screen, to ensure that it is suitable for each of their own fishing adventures, independent of the time or place.


This is an adapter that, in order to transmit signals, transforms electrical power into mechanical energy, and in order to receive signals, transforms mechanical energy into electrical power.

In more recent iterations of fish finders, the transducer is often upgraded to include additional sensors for determining the speed of boats as well as the temperature of the water.

This apparatus is fastened to the bottom of the boat and is positioned such that it is immersed in some kind of liquid.

By modifying the “scanning focal distance,” which may range from around 250 mm to 400 mm, it is able to change both the angle at which it detects objects and the distance at which it does so.

Power Source

A regular marine battery may be used as the power supply for a fish finder. This battery would then provide electrical current via cables to both the display and the transducer.

It is very necessary to enclose this component in a watertight container in order to ensure that it may be used without risk.

How to use a fish finder?

Anglers will benefit greatly from the use of a fish finder. Because of it, they are able to make more informed choices when they come across the kind of fish that they want, despite the fact that the water may have some unforeseen challenges.

In addition, the use of a fish finder will save a significant amount of time while searching for the optimal spot to drop the line, which may be obscured by water.

It is not a simple process, however, for those who have never used this instrument before to comprehend the signals, charts, and other information that is presented on the screen. Not like the one where they simply turn on a TV and don’t have to do anything else to view the “life beneath the ocean” that was filmed by robots or drivers. In that scenario, they just watch it.

In any case, acquiring the knowledge is not an insurmountable challenge. You will learn how to make effective use of a fish finder by reading this article.

Read the manual carefully

It is not very stressful or difficult to read the instructions or construction of the fish detector in the dung, despite the fact that the technical material in the handbook may make this task tedious to complete.

You will get more comfortable with this instrument as a result of this activity, and you may also figure out the general operation of your fish finder.

Turn on the fish finder

When you use a fish finder for the very first time, it could seem pretty unusual to you since you might be curious about how you can use it properly or easily without making any errors.

Don’t be concerned! You merely switch on it and let it run in automatic mode.

Then, in order to get used to using your device, allow yourself some time – maybe five or ten minutes – to fish in the areas that you often fish in, such as bays, the sea, or lakes.

Your job is to keep a close eye on the pictures that are being shown on the screen of your fish finder and note how they shift as you go to new locations.

After you have gained some familiarity with it, you will be able to alter it to additional custom settings in order to make it more suitable for your needs.

Adjust fish finder

When you are doing this operation for the very first time, it is strongly recommended that you adjust the settings of your fish finder one at a time.

It indicates that you should begin the tweaking process with only one feature at a time at first.

This might take a significant amount of time, but it is beneficial to have a thorough comprehension of the instrument in its entirety.

Let’s give it a go using one of the most important parameters, which is the sensitivity. When the sensitivity is altered, the power will also vary based on a rule that indicates that the quality of the display on the screen will be of a lesser standard the lower the sensitivity setting is.

Let’s try varying the power setting from 75% all the way up to 100% so that we can figure out what the best sensitivity level is for the mode you’ve selected.

Suitable speed

The majority of fish finders can be calibrated to precisely see objects moving through the water at a speed of 120 kilometres per hour.

If you allow it to lean forward between two and three degrees, it will allow for a greater pace of operation.

However, if you attach this gadget to your fishing boat, the angle at which it is positioned does not need to be more than one degree.

Read a fish finder’s screen

It is evident that a fish finder is a great supporter in any fishing trip provided that you comprehend what it shows on its screen. If you do not grasp what it displays on its screen, your fishing experience will be severely limited.

You should first keep in mind that the material is read from right to left. This is important to keep in mind.

The numbers that appear on the top left side of the screen of the fish finder provide information on the depth as well as the temperature of the water.

In addition, the other aspects of the environment that need your attention include whether the bottom of the water is soft or hard, as well as the location of underwater plants and the structure.

It is essential to perform the duty of comprehending the colours of what is presented on the screen.

As an example, the colour of the undulating line will show whether the bottom is soft or hard: Your present position seems to be at a firm bottom based on the absence of any other colours and the presence of the red line.

Final Thoughts

Knowing how to operate a fish finder can help anglers be more successful in each fishing excursion since fish finders have a number of key benefits that have contributed to its rise in popularity. I really hope that those of you who have an interest in fishing might learn anything from my tale.

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