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Dry compass
Dry compass
Card: A paper band is attached to the metal circumference and to the centre by fine silk threads. There is a black paper centre. The card is black with white markings graduated to 1/4 points and quadrantally in degrees.
Pivot: Consists only of an aluminium washer that holds the threads.
Needles: The eight needles, in 2 sets of 4, are suspended beneath the card by an independent silk thread system.
Lengths 3.5", 3.25", 2.75", 2.25" (8.9 cm, 8.3 cm, 7.0 cm 5.6 cm)
Card: A paper band is attached to the metal circumference and to the centre by fine silk threads. There is a black paper centre. The card is black with white markings graduated to 1/4 points and quadrantally in degrees.
Pivot: Consists only of an aluminium washer that holds the threads.
Needles: The eight needles, in 2 sets of 4, are suspended beneath the card by an independent silk thread system.
Lengths 3.5", 3.25", 2.75", 2.25" (8.9 cm, 8.3 cm, 7.0 cm 5.6 cm)
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Object Details
| ID: | ACO0845 |
|---|---|
| Type: | Dry compass |
| Display location: | Not on display |
| Creator: | Kelvin Bottomley & Baird Ltd |
| Date made: | 1945 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 40 mm; Diameter: 250 mm |