If one eye was applied to the extremity of the staff (held against the cheekbone) the cross-piece or transversal could be drawn into such a position that it just covered the distance between a heavenly body and the horizon, or between two heavenly bodies.
Ukuba elinye imehlo lisetyenziswe kwisitafu (lubanjelwa ngokuchaseneyo kwithambo letshiki) okanye kwindawo enokugqunywa ngumgama phakathi kwesibhaka-bhaka.