topo maps

[Potsy]

I went to sportsman today to find a topo maps for under water terrain just wondering which one shows it, if it is the national geographic or garmin or if there is another one. just wondering if there is one that shows drop offs and other depths?
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[stan55]

Navionics makes a paper maps for Strawberry and also has a chip you can put in Lowrance and Humminbirds GPS units that has underwater contours for some UT lakes - about 20 I think. Fish-n-maps also puts out paper maps. Those are the only ones I know of. FYI that Nav chip covers the entire west 12 states in all. Very useful and worth the $$$ if you own a finder that can run them.
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