Bottom transitions and composition are more important than many anglers realize. Clay and gravel both show up on sonar as hard bottom and are nearly impossible to distinguish without an underwater camera. The same is true with weeds. Stringy junk weeds have taken over many waters, often pushing out native species that fish usually prefer. In northern waters, for example, bass, walleyes, bluegills, and crappies love cabbage. The challenge is finding those isolated stands of cabbage in waters now dominated by Eurasian milfoil or curlyleaf pondweed. A camera makes the search easier. I usually deploy the camera and troll slowly along breaklines or over large flats until I locate cabbage beds, or key vegetation transitions. Then I drop a marker buoy or hit the waypoint button so that I can fish those places later.