Is there a Humminbird GPS unit that has the 4X/second refresh rate, or something close to it? I just want the GPS, not a sonar/gps combo unit, if possible.

I have the 997 mounted on my console, and a Matrix 97 up front for trolling. It sounds like the Matrix will not get the refresh rate update. If I want to troll with a unit that updates faster, I will have to add one.

Any suggestions?