I can mark route waypoints (route track) on about any mapping program and save as a HDS track (route). It is just terminology crossing and confusion. The HDS can manage the SD card without a computer assist.

I can't drive around and record tracks like the Ipilot. I can only follow route waypoints I generate. I am saving driving around time and gas. The HDS outputs the NMEA data I need to follow the route and I extract the data from the MNEA data I need to steer the trolling motor.