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The clear-vu function is why the transducer is the long skinny type. It can be used for ice but will need a second hole or you run the risk of getting tangled up.Getting it level is a must especially for ice when you want your jig in the cone. You should be able to get it to hang below a float but that won't do you any good when you're on the move in your boat as it will just drag along and point back behind you.It should have come with a transom mount bracket. My advice would be to mount that to the boat so you can use it at speed and get the CV functionality. If you want the CV for the canoe you can rig a float, get another transom bracket or let it shoot thru the hull. Drop the extra coin and get the ice ducer for hard water. If you can live without the CV in the canoe you can leave the stock transducer on the boat full time and use the ice ducer instead as it is designed to hang below a float.
I have a transducer that will work with your finder. It is the ice fishing one PM me if interested
The CV is for finding structure like submerged trees and such. My understanding is it takes very thin slices to get that picture type view. Nice in a boat but pointless for ice. That transducer does CV and standard sonar and you select what you want to see on the screen so it will work for ice in sonar view.Yes you can run it off any DC power source. You'll have to check the instructions for the wiring as my Striker only has two. I would imagine the fused lead is the hot and the extra pair are probably for networking.The only 4 pin ice ducer I know of is the GT8HW-IF. That's the one I use, its adjustable from 16 to 24 degrees and can be had for $100.
You might want to check out Hodges Marine online to see their prices - cheapest I was able to find. You can make the skimmer transducer hang down straight by zip tying a coil/loop in the cable. Having the GPS navigation along with the contour mapping is a great function of this unit that helps locate potential spots and to save the hot spots - main reason I got the unit I have.