Wadada 7-aad ee u jeedda bariga ka hor Surok, iyo wadada 6-aad ee u jeedda koonfurta ka hor Surok, ayaa loo xidhay gaadiidka ka dib dab.
Dab ayaa sababay in la xiro waddooyinka 7 iyo 6 oo u dhow Sorek; gaadiidka ayaa loo leexiyay, isticmaal navigasyon.