Compass card

Dry compass card
Card- Mica coverd with paper, white with black markings, graduated to 32 points and quadrantally in degrees. Has a decorated E point.
Needle-Single flat bar needle 6" long, 0.75" wide at centre, tapering slightly towards the ends. Has a hole at centre of needle through which pivot cup is screwed.
Pivot-Cone-shaped brass pivot cap with jewel at top. Screwed through centre of needle.

Object Details

ID: ACO0907
Type: Compass card
Display location: Not on display
Creator: Scatliff
Date made: 1760
Credit: National Maritime Museum, Greenwich, London, Admiralty Compass Observatory
Measurements: Overall: 15 mm; Diameter: 165 mm