I'm not good at electronics . I bought a dragonfly for my fishing boat. Suddenly my depth reading is 2x what it should be. Like it should be 20 feet and it reads 40. What am I doing wrong ? ----Also anybody know if Raymarine has teaching vides so I can learn how to use it better (particularly reading the picture) ? thanks for your help
Sonar
* Red is hard bottom - rock / clay
* lighter is softer - mud / muck
* “Red” arches in the water are fish
DownVision is a picture view
* looks like a tree it’s a tree
* looks like a rock it’s a rock
* fish are white dots - usually a little brighter
* bigger dots are bigger fish
* bunch of tiny dots - bait fish / ball
That all depends on how clean the water is on the transom. Anytime you have turbulence / air bubbles, transducers tend to blow out. I’ve seen transom mounts read 40+ mph and I’ve seen them blow out as soon as you hit the throttle. As long as you can get a clean reading, it will pick up arches.