I use a Humminbird WideEye portable in the kayak, canoe, and jonboat. It'll give you a bigger, backlit screen to look at and you wont have to drill any holes in your boat. Runs on a couple of lantern batteries. I think you'd be happier with one of the portable units rather that the tiny little thing, it's really made for the shore fishermen. I've considered getting one for that purpose.