Navionics Help


Satellite Overlay with SonarChart Shading Q&A

Q1.  What is SonarChart Shading? 

A1.  SonarChart Shading provides a detailed rendering of the seafloor and lake bottom to deliver a unique perspective of underwater topography at a glance and is created from the high-definition 1’ contour data within SonarChart. Varying shades of blue reveal changes in depth, highlighting channels, drop-offs, and other features that help boaters quickly gain a better situational awareness and visual cues to identify fish-holding structure.

Q2.  Can I preview the detail in my areas of interest before buying?

A2.  The most convenient way to see the level of detail available for satellite overlay and SonarChart Shading is to download the Navionics Boating app – more info at - which comes with a free trial, and download the SonarChart Shading layer in your area of interest. You can also view a coverage map and lake list at

Q3.  Which Navionics products include Satellite Overlay with SonarChart Shading?

A3.  SonarChart Shading is available with our Platinum+ or HotMaps Platinum GPS Plotter Charts, and also within the Navionics Boating app.

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