kevinbp, I think fishaholic18 is correct. If you go to the menu and select MAP, then click the Source tab up top. Turn the Basemap to OFF and MapSource to ON, it should display all the chart information that you've downloaded. You may also have to go to the MAP Setup page and select MapSource Info as well. This is referenced on pages 30-32 in your manual. Good luck.
I've got the 162 with BlueCharts as well. If you continue to have problems, a quick call to Garmin wouldn't hurt. They are very helpful.
Good luck.
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