Therefore on all charts the annual change of variation in the region of the chart, usually in minutes W or minutes E will be given.
Ngoko kuzo zonke iitshati iindidi zotshintsho lwetshati ngonyaka, ixesha elinizi emizuzwini kwiNtshona (W) okanye emizuzwini kwiMpuma (E) izakunikezwa.