F1281-1

Obverse of Gunner's quadrant Long Caption: This gunner's quadrant is used to help determine the elevation of a gun barrel. It is fitted with a spirit level and the scale is marked to 90 degrees. Credit line: © National Maritime Museum, Greenwich, London Object: NAV1048 Artist: George Adams Date: circa 1770 Medium: brass; glass Size: 18 mm x 470 mm x 174 mm Click here to buy a bespoke print of this image.