Old topic but I also run a Lowrance, same as Mark Low we use it for the race in Baja. I also run a Ram 3 suction cup rested on the dash so it doesnt move. It works great if you really just need to follow a pre loaded trail or making a new one. Its set up to make a track as you go so you can either backtrack or save that as a file. Can make notes and drop lots of waypoints. Both PCI and another web site sell you a chip with their western states top/street/offoroad maps. I think you really need to run another program along side lowrance for using it in the states as your main gps. Something like Gaia on you phone where you have access to sat images or US forest service overlays.
The unit is hardwire into your vehicle and most units have internal antenna built into it. I do run an external on mine. Once thing we have found is that even with the western states mapping its not perfectly aligned with the road in a est/west direction up here (Californai). Like the overlay is shifted slighly. It actually works better in Baja haha. But lowrance is made and works out of baja now.
Here are some files you would need to make it usable in the states:
https://www.pciraceradios.com/collections/mapping
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