Having fun using side scan sonar. Posted on January 25, 2019

I’ll introduce myself in case we’ve never met.  My name is Warren Parsons and I do many of the maps Bruce sells on his website, Doctor Sonar.  When I look to create a new map I usually research the area of interest.  A few years back, as I say “hiding out on the Texas Gulf coast for the winter” I found some interesting things in Matagorda bay around Indianola, TX. 

One day I had stopped at the Calhoun County Museum in Port Lavaca, Tx when I saw this drawing.  I put a red circle around what caught my eye.

I had been curious about something I’d see from the beach during low tide.

But this wasn’t in the right place so I checked my NOAA chart and found this where I put a red circle around.

All the NOAA chart offered me was that it called the spot an obstruction but it did link up nicely with the Indianola, Tx image . I was a little nervous as I heard that the local oyster boat had impailed itself on the smoke stake once.  So I waited for a low tide during high weather pressure, lowest water level,  to see if it showed anything and not seeing anything the next high tide low pressure, highest water level,  I ran out with my small mapping boat to this area, the small brown patch.


Turns out to have been the boiler from the steamship that caught fire and sank in 1856.

If you'd like to read more, go here:  The Perserverance




by Warren Parsons under

Lowrance HDS Live Quick Access Buttons Posted on December 20, 2018

This is part of the Button chapter for the new Lowrance HDS Live models. I am in the process of producing a training DVD for the HDS Live models.


Watch Video

Lowrance Quick Access buttons

by Bruce Samson under lowrance

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

Mostly fun and a little education.

Humminbird down imaging

watch video

Understanding Downimaging/2D sonar with Aqua-Vu training Posted on September 07, 2018

What is the blue specks and what are the bumps?

understanding sonar

Watch video for Doc's explanation.


Learning down imaging with Aqua-Vu Posted on August 17, 2018

Sonar training using down imaging and Aqua-Vu underwater camera.

Watch Video

by Bruce Samson under

Catching Side Scan fish Posted on August 01, 2018

Catching fish you see on side scan is tough since they can move before you get to them but I have a great example.

I was fishing for walleye with spinners, worms and a bottom bouncer in the weeds. I thought I saw the jackpot in the red circle. I moved the cursor over to the fish and created a waypoint on them. The green arrows point out the weeds.

side scan white bass

I then trolled through the waypoint in about 1 minute and caught a white bass. Not what I wanted since I was hunting walleyes for an upcoming tournament but a nice example of how to use side scan.

white bass





by Bruce Samson under lowrance lowrance sidescan

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

Does sonar see all the fish? Posted on July 06, 2018

Sonar doesn't show you all the fish below the boat, watch this video to see why.

Hidden Fish Video

hidden fish

by Bruce Samson under

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