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Dry compass
Dry compass
Card: Mica covered with paper, white with black markings graduated to quarter points and to 360 degrees
Needle: Flat bar type with rounded ends 4.5" (11.4 cm) in length. The centre of needle expands to provide aperture for pivot cap. Secured to card by two rivets.
Pivot: Cone shaped brass cap with jewel at top, screwed through aperture at centre of needle.
Card: Mica covered with paper, white with black markings graduated to quarter points and to 360 degrees
Needle: Flat bar type with rounded ends 4.5" (11.4 cm) in length. The centre of needle expands to provide aperture for pivot cap. Secured to card by two rivets.
Pivot: Cone shaped brass cap with jewel at top, screwed through aperture at centre of needle.
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Object details
| ID: | ACO1030 |
|---|---|
| Type: | Dry compass |
| Display location: | Not on display |
| Creator: | Whyte Thomson Ltd |
| Date made: | circa 1930 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 15 mm; Diameter: 133 mm |