Select your product to confirm this information applies to you
BlueChart g2 HD/Vison chart symbols
Garmin uses NOAA (National Oceanic and Atmospheric Administration) charts to create the BlueChart mapping used in our devices. We base our digital mapping on the paper charts made by NOAA.
The best place to find information about the symbols used for the BlueChart mapping is NOAA Chart No. 1 webpage .