Uhh, the map grid is pretty detailed. Look for the degree markings on the edges of the map screen. The further you zoom in, the more refined the markings get. They're marked in degrees and minutes at the highest zoom levels, which is good enough to give you positions down to within a nautical mile.
Anyway, just go to the nav map, zoom in, and read the numbers next to the grid lines around the map edges.
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There are only forty people in the world and five of them are hamburgers.
-Don Van Vliet (aka Captain Beefheart)
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