I live in eastern ky, and fish in lakes that are less than a 100' and from what I can find the lakes I fish are not on the plug in cards but we do go to guntersville, Al and kerr lake in Va. a few lakes in Tn. From the plug-ins I see the lowrance has the eastern region would the lowrance LMS-480m or the LMS-520C be the right choice. This will be my first combo unit and I have a Lowrance X-48 mounted in the dash on a trition tr-18 and I would like to mount the new unit in the dash and mount the X-48 on the bow and can I use an internal antenna on the gps unit. Need Help....
