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  1. #1
    Veteran Member Four Rings PNW Avant's Avatar
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    How will our out-dated navigation systems deal with the shifting magnetic pole?

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    Interesting stuff in this article. Many navigation units have had their final software/firmware update long long ago. Will these units just be inaccurate going forward? Or instead is direction achieved through pulling multiple GPS points?

    https://spaceweatherarchive.com/2019...ur-cell-phone/

    Since late 2014, Earth’s core field has varied in an unpredicted, and currently unpredictable, manner [including a sudden change in declinaton called a ‘geomagnetic jerk‘ in 2014/2015],” says Brown. “The aim of the WMM is to be globally accurate within 1 degree of declination, but we were going to exceed that limit in only 3 years.” That’s why, for the first time, they are issuing an update to the WMM before the usual 5 year mark in 2020.

    Although at the same time, it says the model is updated every 5 years, which is more frequent than older navigation systems are updated.
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  2. #2
    Established Member Two Rings DrGER's Avatar
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    Aug 31 2014
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    I don't think this affects GPS-based navigation devices (since they use data from space) so much as it does magnetic compasses, like the one in our Gentex mirrors (and our sailboat on Lake Erie). And I thought our wonky compass headings the past few sailing seasons were just due to the compass getting out of adjustment...
    2014 A4Q P+ 2.0T 6MT Monsoon Grey. Previous: 2009 A4Q P+ 2.0T 6MT Brilliant Red; 2005 A4Q 1.8T 6MT Cambridge Green; 1995 90Q V6 5MT Pearl White; 1990 80Q I5 5MT Crystal Silver; 1984 5000S I5 5MT Montego Black; 1978 5000 Helios Blue; 1977 100LS Signal Green; 1974 Fox Sahara Sand.



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