Fish Finder Buying Guide – How to Choose a Fish Finder?


As obvious from name, A fish finder is an electronic device that uses Fish finderUltrasonic waves transmitted by a Transducer to locate and display underwater objects on a screen. It is a technology that was developed by some US navy persons more than 75 years ago, and later it got adopted. The method that is used to locate the fishes under sea by fishers is known as fish finder. It is also known as Sonar (sound, navigation and ranging).

Most of the fishermen use this device while on kayak to estimate presence of fish below them ,under water.


When a fish finder sent to a water an electric impulse starts to convert into a sound wave by using the underwater transducer which is already inserted in fish finder called as hydrophone, and when the wave strikes with fish it is reflected back then it comes to provide the information such as size, visibility and shape for that striking object. The exact information depends on the frequency and power of the pulse that is transmitted by the operating apparatus. The process of taking the results can be repeated to 40 times per sec and results visibility depends on being displayed versus time the fathometer function that sports the fish findings. The use of temperature and pressure sensitivity is important to the capability of fish finder units which allows the user to identify the exact presence of fish in the water by the use of apparatus that is called as temperature gauge.

Some of expensive and modern fish finders have that unique feature to locate the change in direction to switch position in respect to movement information to have better fishing. It is easy to get perfect detail to screen when the frequency is high. Deep ocean trawlers and commercial fishers go for low frequency which is in the middle of 50-200 kHz where modern fishers have various frequencies to view split screen results.


There are a various types of fish finder that suits to your choice of fishing experience and to your need.



It is a simplest type of fish finder, if your requirement is to locate the depth of the water and normal information about fishes for non-mapped lake than it can suits to your type of need. It is a basic form of finding it can scan a wide area of your boat and can tell if there is something down there, it can’t provide a high resolution of view to your finding but can provide a feeling to your need of finding.


If you are a frequent fisher and you like to use few mapped lakes and with requirement of finding the fishes into water below surface with the budget of moderate priced sonar than it can be a good choice to your need. It is a 2D representation of view it cast a beam that goes to under the sea to the surrounding if your boat area and gets back a representation of information under the sea in 2D foam it includes to provide the depth of things that are present (fish, stones, water-plants etc.) and the temperature of water.


It is an expensive type of fish finder and used by mostly professionals, it includes the both above provided sonars features including other high-tech features too. It is suitable for those who go for mapped lakes or sea for their fishing as it includes to have a GPS, huge screen display, high level of detail for objects under sea and covers a larger area to your fishing which can helps to provide a better visualization of your finding to your required fishes. You can read more detailed buying guide and reviews of some of best fish finders available in the market at


When buying of fish finders come to question then it is also a thing that comes to our mind should we go for black and white fish finder? The difference of black and white and colored one is about the resolution and contrast which we get on screen and in simple words it describes the visibility of fish finders. The black and white one displays a grey scale image. The difference that comes for buying a black and white fish finder is of low pricing the prices are low with the resolution availability. The more the image is cleared in view the prices are high. If your need is not professional then it is a best choice for you but if you work as professionally a fisher than for distinguishing the difference for your requirement of fish you will need to go for the colored fish finder


It is for professionals as it provide a color visualization of your sonars and are generally high in prices and the prices are not fixed as the 256 color choice is available the more your need is the more price you need to pay. The perfect resolution is the idea for color fish finder and by using those color fish finders you can have a huge view to the things under the water as it can provide a real image to your fish type you want.

One thing that’s should be kept in mind before choosing a perfect fish finder for your need is to go for that screen which can give a good view in direct sunlight .

Things to see when buying a fish finder

When a costumer first time go to buy a fish finder for his/her best fishing experience, he/she may get frightened because of so many varieties of fish finders and wast number of features along with them.
This article will help you narrow down your search about fish finder and guide you in best way to choose a fish finder after observing some standards.  They have listed down some of top fish finder companies and reviewed them in detail.
So some of the factors are written down which will help you to take decision faster to buy a fish finder.

1: Material :

The first step is to select the material of transducer whether it is made of :

Metal Housing (best of use for reliability but portability is difficult)
Plastic Housing (best for portability)

2: Technology Using :
It uses SONAR(Sound and Navigation Ranging) technology to locate fish in water.The SONAR system fish finder uses the aspect of echoes to reflect back the waves to the transmitter. The reflected waves are recorded and a signal is sent to the screen.

3: Screen Type :
While buying a fish finder, always choose wisely about the display type of fish finder.
LCD screen type is good for such adventures but LED technology because it gives bright display in outside.
Screen sizes ranging from 4.5 inches to 9 inches are mostly used.

4: Power :
Power factor depends on user requirement whether user wants a fish finder for portability and fir kayak or a professional level fish finder for boat.
For portability. It comes with Lithium battery energy storage with fish finder while for a bigger fish finder, energy input is from boat’s electricity.

5 : Extra Features :

While buying a new fish finder, always consider all mentioned followed features before buying a fish finder:

 GPS capability
 Standard Screen Size
 Installation Type
 Screen Resolution
 Custom map making capability

Leading Manufacturers:

 Garmin
 Humminbird
 Lowrance
 Raymarine

There are a lot of fish finders that are available in market by reading the above article you can easily specify a good fish finder regarding your needs.