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World Magnetic Model

iPhone / iPad
  • Navigation
  • Education
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World Magnetic Model (WMM) calculates the components of the Earth’s Magnetic Field. It uses the computational engine developed by the US NGDC (National Geophysical Data Center) and other agencies. The computational engine is in the public domain.

This app is intended to be used for educational purposes only. Please don’t use it for navigational calculations critical to safe navigation.