Bottom Line Fish Finders 

& 

Cannon Downriggers!

Affordable electric downriggers like the Mini Mag and Magnum 10 (workhorse of the Great Lakes) make trolling with downriggers a pleasant experience.
The Tournament 4300 The multi-directional transducer provides side and bottom images, records water temperature and boat speed. One transducer and one screen - providing highly detailed multiple views to the bottom and side and digital displays of the water's surface temperature, depth and boat speed.
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.