Bottom Line Fish Finders 

& 

Cannon Downriggers!

From the Bottom Line Portable Fishin' Buddy to the Tournament NCC 6500, you'll enjoy the high resolution screens and high powerful transducers.
Cannon downriggers can be controlled by the NCC 6500 and the NCC 5300. 
Affordable electric downriggers like the Mini Mag and Magnum 10 (workhorse of the Great Lakes) make trolling with downriggers a pleasant experience.