Just bought a used i-finder pro and the other day was trying to set up and put in my lake master 09 card and it will not read this card. I am wondering could you damage the card or wipe the information off of the card? I then proceeded to buy the Navionics hot maps card for this unit.
If you zoom way out so that you have a view of the whole united states you should see an outline of minnesota if the gps is reading the chip…You will have to zoom farther in to view lake contour information. Lakemaster has a plug and play application, unlike Navionics where you would have to select the specific region you want to view. Try zooming way out with the lakemaster chip to see if you can see the outline of minnesota. 
All I get is a picture of North America
Can you zoom into Mille lacs lake and see any contours?
Yes I zoomed in on blue jug flat, flamingo reef and 2 mile reef. I may have more questions later.
1 foot contours?
Yes one ft contours.
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