Enhanced satellite image on an encrypted SD card for current Lowrance models. These images are overlaid with the pre-inundation Corp of Engineering maps of the lake showing tree areas, roads, and more. The HDS model Lowrance built in Insight Genesis also give extra contour overlays to go along with the maps contours.
HDS Gen 1-2-3
Elite HDI/Chirp/TI & Hook models.
Built-in Insight Maps will overlay the satellite image