Furthermore, the Earth's magnetic field is unsymmetrical, so that a compass needle will not necessarily point along the true or Mercator meridians but will be coincident with the magnetic meridian whichever direction this may be positioned at the geographical region of reading.
Ukuqhubela phambili nzulu amasimi omhlaba kamazibuthe anamacala angalinganiyo ukwenzela ukuba inaliti yekhampasi ingakhombi ngokuyifuneko kwindawo eyinyani okanye iMeridiyani yeMekhatha kodwa izakudibana nomazibuthe wemeridiyani nakweyi phina indlela enokubekwa kuyo kwimimandla ngokwenzululwazi yomhlaba kufundo.