Bottom Line Fish Finders 

& 

Cannon Downriggers!

Bottom Lines portable Fishin' Buddy 1200 and Fishing Buddy 2500 mount easily to a dingy, fishing tube, or a dock.  There Tournament 4300, Tournament 5300 and the Tournament 6500 are some of the most sophisticated fish finders in the world.
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.