Sextant made of brass, together with a rosewood box elegantly decorated with brass inlays.
Measurements: 12 x 12 x 8 cm.
The sextant was invented in 1730 by John Hadley and Thomas Godfrey to make maritime navigation easier. The sextant makes it possible to obtain the angular height of the sun above the horizon.
The sextant consists of a small telescope (for viewing the horizon), two mirrors (which reflect the image of the object), filters (for the sun), a movable arm and a graduated arc of a circle. The opening angle is 60º, one sixth of a circle, hence the name of the instrument.