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Dry compass
Card-Mica covered with paper, blue with blue and black markings, graduated to 1/4 points and quadrantally in degrees.
Needle- Two light edge bar needles, 4.4" long, 1" deep, 2.9" apart. Mounted on two light bars secured between ends of needles and screwed to card.
Pivot- Cone-shaped brass pivot cap with white metal bearing at top, screwed through centre of metal disc at centre of card.
Needle- Two light edge bar needles, 4.4" long, 1" deep, 2.9" apart. Mounted on two light bars secured between ends of needles and screwed to card.
Pivot- Cone-shaped brass pivot cap with white metal bearing at top, screwed through centre of metal disc at centre of card.
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Object Details
| ID: | ACO0989 |
|---|---|
| Type: | Dry compass |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | circa 1861 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 35 mm; Diameter: 235 mm |