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Compass card
Dry compass
Card: Mica covered with paper, white with black markings, graduated to quarter points and quadrantally in degrees, has decorated E point. Has royal coat of arms at N point.
Needle: Two edge bar needles with rounded ends 6.0" long, 0.4" deep, 3.0" apart. Mounted on two light bars secured between ends of needles and screwed to card. There is a brass stiffening ring near the outer edge.
Pivot: Cone shaped brass pivot cap with jewel at top, screwed through centre plate of bracket having two short arms which are attached to the two needles.
Card: Mica covered with paper, white with black markings, graduated to quarter points and quadrantally in degrees, has decorated E point. Has royal coat of arms at N point.
Needle: Two edge bar needles with rounded ends 6.0" long, 0.4" deep, 3.0" apart. Mounted on two light bars secured between ends of needles and screwed to card. There is a brass stiffening ring near the outer edge.
Pivot: Cone shaped brass pivot cap with jewel at top, screwed through centre plate of bracket having two short arms which are attached to the two needles.
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Object Details
| ID: | ACO1003 |
|---|---|
| Type: | Compass card |
| Display location: | Not on display |
| Creator: | John Lilley & Son Ltd |
| Date made: | circa 1880 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 20 mm; Diameter: 235 mm |