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Garmin LakeVu HD Maps are not Displaying the Safety Shading
The Safety Shading feature allows the user to manually input a specific depth and shade the maps up to that depth to help avoid running aground.
When this setting is adjusted, the map will only change when the device has a position set on a particular lake. This can be done by either acquiring a GPS signal while on a lake, or using the Simulator to simulate a GPS position on a lake.
If the map is panned to view a different lake that the device is not set to, the lake will not be adjusted by the safety shading settings.