Garmin lake map
I bought the Garmin Winni map for my Nuvi 205W. I did not have to add an external memory card, as there was plenty internal memory available. To see the lake map, I get into map settings and uncheck the main map, leaving the Winni map checked. If both maps are checked, the lake features do not show. There are good contours and bouy's on the lake map, but I haven't had a chance to navigate with it. At $10, it was worth a gamble. Bizer's is better for showing routes and we know its the best for marking rocks. I'm not very happy with my Horizon GPS unit that I run Bizer's maps in.
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