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Dry compass
Card-Kelvin style card. Has a paper band which is attached to the circumference and to the centre by silk threads. There is a silver paper centre. The paper band is white with black markings graduated to 1/4 points and quadrantally in degrees.
Pivot-An aluminium pivot cap secures the silk threds and silver paper.
Needle-There are eight needles, in 2 sets of 4, suspended below the card by an independent silk thread system. Lengths 3.5"; 3.25"; 3.0"; 2.25" ( 9cm, 8.3cm, 7.6cm, 5.6cm)
Pivot-An aluminium pivot cap secures the silk threds and silver paper.
Needle-There are eight needles, in 2 sets of 4, suspended below the card by an independent silk thread system. Lengths 3.5"; 3.25"; 3.0"; 2.25" ( 9cm, 8.3cm, 7.6cm, 5.6cm)
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Object Details
| ID: | ACO0905 |
|---|---|
| Type: | Dry compass |
| Display location: | Not on display |
| Creator: | Nippon Kokaikeiki Seisakusho |
| Date made: | circa 1945 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 10 mm; Diameter: 252 mm |