Electric Downriggers

[Bduck]

I would think about this, it works and will help you catch more fish
Cannon comes with this 
Positive Ion Control
Emits a fish attracting field of positive ions around the cable. Your boat emits negative ions, which can detract fish from coming near. Positive ion control releases a field of positive ions around the cable to bring the fish back where they belong – on your line.

if you buy another brand I would think about buying a Black Box
https://www.protroll.com/bb-all-chapters

Walkers do not require the black box as with most other electric downriggers. They have the positive ion control built in. I have never had the need for a black box in the fifteen years I've been using my DR's, same goes for the Scotty's I had. Walker also had their own original version of a black box in the beginning prior to protolls development but found it unnecessary to use it with built in ion control. Check what the pros and cons are of the black box before purchasing. With electrics make sure your electrical hookups are clean & secure. Aluminum boats are more apt to emit electrical field around boat scattering fish but its based on all power installations properly installed with good secure grounding throughout the boat.

www.walkerdownriggers.com