Sextant
Vernier sextant c1920. A sextant is an instrument which uses a series of mirrors to measure the angle between a celestial body and the visible horizon. It is used as a navigation tool at sea.
Vernier sextant c1920. A sextant is an instrument which uses a series of mirrors to measure the angle between a celestial body and the visible horizon. It is used as a navigation tool at sea.