Bottom Line Fish Finders 

& 

Cannon Downriggers!

BottomLine fishfinders and depth finders utilize sidefinder technology allowing you to pinpoint fish below your boat and off to the side, at the same time.
For the ultimate experience, link up the Magnum 20 Digi Troll or the Digi Troll IV with Bottoms Line NCC 6500 and control your downriggers right from your fish finder.
Affordable electric downriggers like the Mini Mag and Magnum 10 (workhorse of the Great Lakes) make trolling with downriggers a pleasant experience.