I live on an inland lake in NC called Lake Hickory.  It's part of the Catawba River.  I noticed a Lowrance labelled vehicle with CMAP in big letters on the side parked in a large boat landing parking lot.  It was there a couple different days this week.  It's a sport utility vehicle with an empty boat trailer.  See the pic.  Mapping Lake Hickory I reckon.

https://photos.google.com/photo/AF1QipOaN6bE92klrOvtdQELb6usT_zi6y_N4pQ1Mn2S