File:Magneticdeclination.jpg
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current | 01:00, 12 October 2007 | 768 × 738 (86 KB) | Jomegat | {{Information |Description = Diagram showing the pattern of magnetic declination in the United States. |Source = http://education.usgs.gov/common/lessons/how_to_use_a_compass_with_a_usgs_topographic_map.html }} Category:Navigational aids [[Category: |