However, it’s use depended upon two factors, namely the possession of a good watch to determine the local time (assuming good noon observations were taken daily), and a sufficient mathematical knowledge to carry out the necessary computations.
Nakanjani isebenza kwizinto ezimbini egama lilbango lwewotshi ukuchaza ixesha lasekhaya (kucingelwa imini ijongo olwenziwa yonke imihla) nolwazi ngezibalo olwaneleyo kuchunetheza efumekayo ukuthuwala.