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To overlay radar returns on a GPS/chart plotter, as shown in this screen shot on an Lowrance HDS-10, you to need to install and connect an electronic compass such as the Simrad RC42.

How to Create a Radar/Chart Plotter Overlay for Safer Navigation

Use these tips to install an electronic compass and create a radar overlay.

To overlay radar returns on a GPS/chart plotter, as shown in this screen shot on an Lowrance HDS-10, you to need to install and connect an electronic compass such as the Simrad RC42.

How to Create a Radar/Chart Plotter Overlay for Safer Navigation

Use these tips to install an electronic compass and create a radar overlay.

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