Now this change could play havoc with your average Saturday offshore yacht race.  I wonder if B&G H5000 have a programmable offset for it?
https://www.newsweek.com/ancient-tree-discovered-earths-magnetic-field-1447570?fbclid=IwAR00v91Jr5uH2Yj4m_eirFr-1WPpUvVrDUW0f9uzlB2K-BXgJL_ufkQyygo