The Imagery is made by someone who never wants to be stuck again on a sandbar 8kms from the Mouth of the Roper River NT late afternoon into the night for 5 hours with nothing but high tide tracks on the chart plotter all heading over shallow water & sandbars. For those that have been in that lonely situation, or stuck on a boat with a packet of chips & with your inbred Cuz's , you'll know the importance of the Lowrance Chart Plotter maps we have here on this website. They are not designed for Humminbird or Garmin Fish finders.