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NAD 27 for the datum you select NAD 27 CONUS (for Continental US ). I had to buy a cpluoe of books on GPSs to find this out. Otherwise the owner's manual, while it is a little concise, is pretty thorough and easy to use. If your needs are simple, like mine, and you do not need to have topo maps loaded into the GPs, this is an excellent choice at a great price. (Even with a GPS it is always advised to go into unknown areas of the wilderness with a map and compass as well. If you work with a map, you will probably use the UTM system so you will need to learn how to work with that and get a plastic scale for reading meters in grids . A good book on the GPS can be helpful in these regards the owner's manual does not go into these details.)Help other customers find the most helpful reviewsa0Was this review helpful to you?a0 | a0
02/03/2012 11:18
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