Probably best to call Garmin on this one. My boat neighbor has had two failures similar to what you are seeing; apparently a known problem. Garmin stood behind the product for him.Thanks. I tried changing the Range to B and turned off the sea clutter. I tried adjusting the filters and checked to make sure No Transmit Zone settings were off but still no change. The LED on the radar base flashes green which the documentation says shows normal operation. I am attaching 2 more screenshots, the first showing radar and the second radar/chart overlay so you can see what is missing from the radar. I’m going to call Garmin tomorrow but if any one has any other suggestions please let me know.View attachment 133625View attachment 133626