It's a multifunction gps. They can be used for marine or offroad. It depends on what maps you buy or you can create your own maps.Is that a fish finder?
I do the same thing but with a clamp style ball mount from RAMView attachment 167548 View attachment 167549 View attachment 167550 Got this idea from Montecresto. I see he's already posted his excellent mount on page 1. That's a diamond 1" ball mount from Ram Mounts in the first picture, then a short 1" arm, then the X-grip from the same company. Solid as a rock.