EntityQ1163109· pop 23· linked from 28 articlesmagnetic deviationSign in to saveerror of a magnetic compass caused by local magnetic fieldsConnectionsTrue northEntityInternational Standard Book NumberEntitycompassEntityGlobal Positioning SystemEntityWilliam Thomson, 1st Baron KelvinEntityFourier seriesEntityEarth's magnetic fieldEntityglobal navigation satellite systemEntitymagnetic declinationEntityFederal Aviation AdministrationEntitycelestial navigationEntitygyrocompassEntityNorth Magnetic PoleEntityremanenceEntityradio navigationEntitybinnacleEntityJoão de CastroEntityheadingEntityelectrical deviceEntityArchibald SmithEntityCategoriesAngleGeomagnetismNavigation