I wondered what those marks were on my sonar. Now I know that it is my jig and not fish!
I try and keep my trolling motor on the 200 to get the narrow beam to better pinpoint my structure. I have noticed that when I use the wide beam I get a jig track sometimes. I have rods that are either 6'6" or 12' and nothing in between. That is a large difference. The 12' have no feel and you can really only tip or line watch with them. The 6'6" are a little short sometimes. Santa did not bring me an 8' rod so I am on my own.