Hey GTO. In your split screen pic remember, the si view refreshes from top to bottom. In other words, the newest data is at the top. Your fish are moving away from the pylon. Trolling below 1mph all the time and I always get excellent pics so I throw the bs flag on the 1mph minimum thing. I try to match the screen speed with the boat speed for a real accurate picture. Too slow or fast tends to distort the image. But it will still work, just depends on how pretty a picture you want. I tend to prefer sonar for fish and si/di for structure. Just my opinion. I'm still learning it.