A Complete Guide On Selecting The Best Fish Finder

If you are a fishing enthusiast, then you must be familiar with a fish finder device. But then, due to the popularity of this device, choosing which one to buy can be a bit of a challenge. When you go online and do your search, sometimes you will get lost on the transducers, echoes, transom mounts, fishers, sonar and all other features that we sometimes forget are the most important things that we should consider when looking for the best fish finder to buy. Basically, the goal of the fish finder is to help you to easily catch fish, and therefore, you should look for a fish finder device that helps you to be able to catch more fish. So here is a guide that can help you to decide which of these hundreds of fish finder devices you should invest in.

Frequencies – Dual, Single and Multiple

The frequencies are among the most important factors that one should take a look at when buying a fish locating device. A lot of the dual frequency transducers come with the 20 and 60 degree cones. The frequencies are certainly an important factor in transducers. Others would come in 200, 1925, 83 or 50 frequencies and this will be in relation to the cone angle.

Those with much higher frequencies, such as the 192 and 200, work best on shallow water while those in low 50 KHz transducers are perfect for deep water fishing. Thus, professionals who need a fish finder for commercial fishing should go for those with low frequencies. Just remember that the higher the frequency, the more details that will show up on the screen of your fish finder.


Power is another important factor that one must take into consideration when selecting the best fish finder to buy. The power of the fish locating device is often measured in wattage and the greater the wattage, the faster your unit could display readings.

On the other hand, if you go for fish finders with a lesser wattage, then you can expect for it to be slower and thus, they are more suitable for shallow water. The reason for this is because your fish finder will translate the sonar waves that it receives from the transducer. If the overall power is less, then the sonar waves will work out slower and eventually, the reading will be fuzzier. If the overall power is greater, the waves would be faster and the reading will be even clearer.

Screen Resolution

The screen resolution of the finder matters a lot. So think of this when you are out looking for the best fish finder to buy. Just think of the pixel as that single dot on your screen. The dot is that tiniest detail on your screen which forms altogether to create images for you to read. So if it says that the screen is 640 x 640 pixels, then this means that there are 640 “dots” on each row of the display screen from right to left and another 640 dots going to each column from up to down. Just keep in mind that the greater number of pixels there are, the more that you are able to see clear details on your screen.

Colored or Black & White Screen

Colored screens are the latest standard in electronics for they allow a much clearer and greater detail by showing up to a million colors as compared to just mere 265 shades for black and white screens. Thus, a colored fish finder can help to make you see fishes clearly and several underwater objects will clearly pop out at you on your screen.

This certainly makes it much easier for you to be able to see what is going on underneath. Furthermore, colored screens are much easier to see in brighter light as compared to the black and white screens. Now if the weather is a bit cloudy or dark, the screens will be clearer. Although outdated, there are still black and white models of finders that you can find in the market, and are common on the cheaper brands and model. But if you want something that is really worth it, go for the colored ones. The difference of the price is nothing compared to the convenience that you get to enjoy.


Remember that the transducers are the main units in the fish locator which emit and receive the sonar waves. It is the transducer that sends a sonar signal towards the water and then they bounce off on objects underwater that are then picked up again by the transducer. The fish finder devices that come with transom mount transducers are the best choice. They are much easier to mount and require little installation. So look for these fish locating devices if you do not want any hassles on the installation.

Cone Angles and Beams

The cone angle is an important aspect that should be considered when it comes to choosing the transducer of a fish finding device. Basically, the cone angle refers to how wide of a beam is to be sent from the bottom of your boat towards the water. This is some kind of an upside down ice cream cone and at the top of it is a very thin and pointy shape. As this goes down even deeper down the water, it becomes wider and wider.

The wider the cone becomes, the larger the area that it could cover. So as you go deeper and deeper with your fishing, the cone gets wider as well. It is important to know though that when the cone becomes wider, its sensitivity will begin to diminish on the deeper water. The transducer cones are available in the range of 9 degrees up to 60 degrees. Most of the units are often in between 16 to 20 degrees and a 20-degree cone is the best point to start at for anglers who are fond of fishing in different depths of water.

Hopefully this guide can help you to find that perfect fish finder for your next fishing excursions.