Cannot view lakes on 1870f. Do I need to purchase the map?

treefort

New member
Hi,

I just purchased a boat with the 1870f GPS and the lake I went on a couple days was barely noticeable on the display, as you can see in the attached photo. After I selected custom then unlocked the map, it zoomed right in to the point where I couldn't see the shore, so that wasn't any better. Do we need to buy charts for lakes too? All my past GPS showed the actual lakes and I could zoom in etc. They didn't show the topography but showed the outline of the lake, my waypoints, tracks etc. Thanks alot.
 

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By the sound of it, you need a chart that provides coverage for that lake. I am sure C-map offers it. I recommend talking to C-map who sells the 4D maps. (1-800-424-2627)
 
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