This method can be considered to be reasonably accurate, as it involves a visual bearing of an object together with the distance off obtained by taking a vertical sextant angle of the same object, extracting the relevant distance off from Norie's or Burton's nautical tables.
Le ndlela ingathathwa njengendlela enyanisekileyo ethe ngqo, kuba idibanisa iimpawu ezibonakalayo zezinto kwakunye nomgama ukusuka ofunyenwe ngokuthatha imbombo exwesileyo edibanisa umhlaba nesibhakabhaka yento enye, esusa umgama olungileyo ukusuka kwitafile yomkhosi wamanzi kaNorie no- Burton.