Fish Finder User Manual

A fish finder is a machine which is used to detect the presence of fish in any enclosed or open water and it makes fishing easier these days. If you want the best output from a fish finder, first you have to know every pros and cons of its operating manual that show in here to get the best performance from it.

You have to be at home about its operational mechanism and features. A fish finder is smaller than its activity, but it has some complex and sophisticated user mode to use. As I have said earlier, to have the best possible report about the underwater image, you need to know how to use the fish finder and what mode is suitable for that specific atmosphere. In this article, I will elaborately explain some mode of the fish finder which will surely make you operation with fish finder easy and comfortable. So, let’s begin.

Fish Finder: Bottom Lock Mode:

In this mode, the sonar sends the signal and it get reflected from the object or sea bed and return to the receiver. The basic criteria of this mode are the signal becomes amplified many times before it came back. The signal usually widen up to ½ or 1/3 on the screen bottom of the fish finder. You can also get the accurate scale. For this, you have to adjust the scale and make the seabed road on the screen as suggested by your fish finder machine. After adjusting the scale, you can gently switch he B/L or Bottom lock mood on and B/L scale active.
In this mode, the sea bed will appear straight near your desired target for a better assessment. Again,. If you want the appropriate report about the sea bed structure, you can switch to normal display mood. B/L mood will show you relative picture while normal mood will provide you actual report about the under keel circumstances.

Widening Result Mood Of The Fish Finder:

If you are looking to hookup the middle level fish, you can use the fish finder. But there is a catch. You cannot understand or visualize the signal as they may appear too small sometime in the display. In this case, you can just switch on the special mood for a better view. You have to determine a particular area in this mode for a better visualization.

Bottom Zoom Mood (Special Mood B)

Sometimes, the sea bed will be your point of interest. You may want to exploit it or looking for oyster, lobster etc, you can apply bottom zoom mood which is also noted as special mood B. In this mood, the machine will put attention to the bottom and the particular sea bed area will be appeared on the display for your better understanding.

Common Fish Finder Machine:

Well, there are number of fish finder machines available in the market. Basically, they all have the common moods for a rough idea about the underwater situation. Usually, a fish finder will help you to decide and optimize the depth, seabed structure and presence of any large underwater stricture etc. Not only fishing with rod, the professional fisherman uses the machine while fishing with trawling lines, nets and so on.

The most renowned fish finder manufacturers are JRC, FURUNO, SUZUKI, HONDEX, CODEN etc. Again these brands will offer you several models with different features. Like FURONO will offer you Furuno FVC 668, Furuno FVC 665. CODEN has different models with very impressive features with each models. Now there are CODEN CVS 821, CODEN CVS 106, CODEN CVS 8832, CODEN CVS 8814, CODEN CVS 822, CODEN CVS 8831 etc. Hondex has its SDA 7050 and SDA 705.


There are some horizontal fish finder available in the market too. This horizontal fish finders can detect fish, determine its course and speed, can easily draw their movement line etc. The famous Horizontal Fish Finders are Furuno Air CH 24, JMC CSS 3000.
Squid Finder:
Squid finder is also a kind of machine which uses the same sonar principle of fish finder. The sound propagate through the water and back to the receiver, The machine calculate the time difference between the sending and receiving and thus they measure the depth of water or the object.
Usually these squid finder is used in the developed countries and their sea food research institutes. Again if you are interested in squid fishing, you can have one of them. Usually in heterogeneous situation, the sound wave in sea water is about 1.5 kilometer per second. If the current density of the water changes, the speed of sound in that water will also change. To get a more précised and accurate result, you have to determine the density of the water and adjust it with your squid finder.

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