Iska ta tashi

Ranar faruwa : An ambaci farko a cikin 1300 AD, amma masana kimiyya sun tabbata cewa alamar ta tsufa.
Inda aka yi amfani da shi : Asali ma’aikatan jirgin ruwa ne suka yi amfani da iska a Arewacin Hemisphere.
Ma'ana : Iska ta tashi alama ce ta vector da aka ƙirƙira a tsakiyar zamanai don taimakawa matukan ruwa. Iskar tashi ko kamfas ta tashi kuma tana nuna alamar kwatance huɗun tare da matsakaicin kwatance. Don haka, ta raba ma'anar alamar da'irar, tsakiya, giciye da haskoki na dabaran rana. A cikin ƙarni na XVIII-XX, ma'aikatan jirgin ruwa sun cika jarfa da ke nuna iskar ta tashi a matsayin mai talisman. Sun yi imani cewa irin wannan talisman zai taimaka musu su koma gida. A zamanin yau, ana ganin iskar tashi a matsayin alamar tauraro mai jagora.