The notes specifically mention C-Map.
"Depth Routing:
Depth Routing is a new feature for Lowrance trolling motors. Depth Routing utilizes our CMAP charts to create dynamic routes on the fly to always keep the boat in a desired depth. By setting the upper and lower depth limit, the Lowrance display will find areas on the chart within these boundaries and continuously draw a route that the boat can follow. The trolling motor can navigate this route for you as you fish."