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Anglers often find fish with sonar and then they don't bite, this video explains one reason they don't. Posted on January 31, 2020

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How to level your side imaging transducer Posted on December 02, 2019

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Find the fish, fish the fish and understand sonar with Aqua-Vu underwater camera Posted on November 14, 2019

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sonar and fish identification Posted on October 05, 2019

Using sonar, down imaging, Lowrance, Humminbird, and Aqua-Vu to study fish

 

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Will the northern eat the sucker? Posted on October 10, 2018

Mostly fun and a little education.

Humminbird down imaging

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Side Imaging training Posted on July 15, 2018

Side imaging training

Above the black is smeared because I was turning the boat.

The green arrows shows patches of weeds in boulders and yes this is a good place to fish!

side imaging interpretation

Fish or weeds? Posted on July 15, 2018

Just another example on why down imaging helps sonar interpretation. The weeds look similar to fish.

Weeds or fish 1

 In this one the fish look like weeds.

weeds or fish 2

Autochart Live Tip Posted on June 30, 2018

Watch this short video to show you how to manage errors on your AutoChart Live map.

 AutoChart Live

 

Autochart Live Tip

by Bruce Samson under AutoChart Live humminbird

Understanding unusual side imaging images Posted on May 08, 2018

Warren Parson captured some great video of flooded structure on Devils Lake with his Aqua-Vu HD camera

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Devils Lake side imaging

Fish size on sonar Posted on October 30, 2017

Identifying fish size on sonar is very difficult since you can change the size with sensitivity adjustments or depth range. Fish look larger on a depth range of 20 foot than 100 foot. The size of a fish is determined by the color of the fish arch. For example if you have palette colors yellow, blue and red. The more yellow you see the bigger the fish. The thickness of the fish arch also determines fish size. How long the fish arch is just how long the fish is below the transducer.

In the image the black vertical lines show how long the fish is under the transducer and the green lines show the thickness of the fish arch.

fish arch

The best way to tell size is catch one the fish you see on sonar or use an Aqua-Vu camera.

The first example shows my bait dropping (green arrow), the bait is intercepted by a bass (red arrow) and the bass swims to the bottom (black arrow) and then I set the hook and catch him.

bass

This is the bass.

large bass on sonar

How about these fish. Needless to say I was excited when I found them but they didn't bite so I dropped the Aqua-Vu camera and was surprised what I found.

carp on sonarcarp on sonar 2

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 On this screenshot is a 7.5 lb. northern pike, you can see when I set the hook and started bringing him to the surface.

Northern pike for sonar size educationnorthern pike

The last screenshot is smallmouth bass and I caught a few, this is a picture of one of them. One of my favorite fish to catch.

smallmouth basssmallmouth bass

This screenshot shows a 29.5 inch walleye after being released.

29 inch walleye29 inch walleye

I was lucky in my timing to collect good data to prove fish size on sonar.

Last but not least is what a 5 inch minnow attached to a sinker looks like with 1.5-2.5 lb. walleyes below it.

walleye and minnow size on sonar

 

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