I have two boats , Both have sonar but only one has GPS . Can I power up my hummingbird without the transducer just for marking and finding spots in my other boat ? Thanks in advance.
I have ran my Humminbird 788ci without the transducer connected. I used it just for GPS when icefishing. I think you might get an message saying "no transducer" but you can go into the settings and turn sonar off. Will eliminate this message from then on.