Educational Articles » lowrance

What Big Fish Look Like on Sonar Posted on June 06, 2013

Determining size of fish is difficult with sonar - but surely, you want to know what big fish look like on sonar. This image shows big fish I was targeting this day and this is what I would see on the sonar. Notice the DownScan and the traditional sonar show a thick band and this is the best way to tell size.


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by Bruce Samson under lowrance lowrance sonar

Fishing Near Drop Offs -- Catching Fish Near Drop Offs Posted on June 04, 2013

We rarely see fish on drop-offs because the closest “bottom” to the transducer is the drop-off, so the fish are not displayed. Sonar displays the echo strength of the target and the distance the target is from the transducer. The first example has the fish a farther distance from the transducer than the bottom so the fish echo is added to the “bottom“ echo and not seen. The “bottom” under the transducer is 25 ft, fish at 23 ft, and the drop off “bottom” is 20 ft. Now visualize what the sonar will show you. The picture is my rough drawing so it is not to scale; it is just to get you thinking.


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by Bruce Samson under lowrance lowrance sonar

Sonar Mastery Article Posted on June 02, 2013

Sonar Mastery Article


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by Bruce Samson under lowrance lowrance sonar

Finding Fish Near the Bottom with Sonar Posted on June 01, 2013

If you can’t find fish near the bottom with sonar - you can’t catch them!  I will show you one way to find hidden fish.

Fish close to the bottom are sometimes displayed as bumps. You have 2 ways to decide if a bump on the bottom is a fish. You can drop an underwater camera or use high definition color sonar. Fish return weaker echoes so they display a different color than the bottom depending on the setting of your colorline and sensitivity.


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by Bruce Samson under lowrance lowrance sonar

HDS Frequency - Comparing Fish with 83 and 200 plus Posted on May 14, 2013

 We will compare the freshwater HDS frequencies plus how to eliminate cross talk.


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Google Earth and Lowrance Waypoints Posted on May 08, 2013

You view your Lowrance waypoints on Google Earth. Google Earth has satellite images of Earth that you can zoom in and see lakes and rivers. This is another way to view where you placed your waypoints on a different map than on your Lowrance GPS map.

Some images can show weed lines and shallow rocks. By placing waypoints on Google Earth can mark fishing spots for future use.


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