Graphical solutions of the nautical triangle by geometric drawing were still being taught in the eighteenth century.
Izisombululo zegrafu yonxantathu wenotikali ngokwezimbo zeJommeth, bezifundiswa ngenkulungwane ukuba kuhlanganiswe iziqalelo zempumantshona, nomntlamzantsi zemini yohambo olo sele lugqityiwe.