A navigational instrument incorporating a telescope and an angular scale that is used to work out latitude and longitude. Latitude is calculated by measuring the angle between the horizon and a heavenly body.
Isixhobo sobumatiloshe esisebenzisa iteleskopu nesikali sobumbombo esisetyenziselwa ukubala ubude nobubanzi. Ububanzi bubalwa ngokulinganisa i-engile phakathi kwento enzima nolundi.