Go with the Lowrance H20c model. It’s hand held, durable, waterproof, and easy to use.

Hate to sound dumb, but I don’t know where to go around the rochester area to catch fish. I mainly do walleye fishing up north, but am sick of foster arends park in rochester. I’m not looking for tips really-just other lakes to try. Any suggestions? Where can I get a detailed map of the lakes around here? Thanks!