F6429-001

Mariner's quadrant, circa 1600 Long Caption: Brass quarter of a circle with two sights, and an engraved scale from 0°-90° by 1°. Every 5° the lines have been extended to the apex of the instrument. The plumb bob is a probably a later replacement. The back of the quadrant is blanc, but for a thinly engraved circle with a diameter of 108 mm. This is a mariner's or surveyor's quadrant. It is used to determine the elevation of a celestial body above the horizon or the angle of elevation of a building or geographical feature. The sights and plumb bob are intact. Credit line: © National Maritime Museum, Greenwich, London, Barberini Collection Object: NAV1053 Artist: unknown Date: circa 1600 Medium: brass Size: radius: 175 mm Click here to buy a bespoke print of this image.