With the sextant, the position of the sun or that of a star in the sky is accurately measured. With this data and other navigational means the position of a ship at sea can be deduced. This particular sextant was bought in New York at the end of the 1890s by Captain Abraham (Ban ban) Jacob Neuman (1876-1941) and it has been passed down by three generations of sailors before reaching its final destination at the Bonaire Museum.