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Azimuth Circle
A glazed azimuth circle with a silver scale around the circumference. Scale graduated 0-360 degs. On top of the glass is a framework of four radial arms, two of which terminate in verniers, graduated 0-30. This framework turns in azimuth and carries fore and back sight. Fore sight consists of open arch and thread with a small celestial reflector and prism. Back sight is a truncated fan-shaped plate with slit at centre. This also has two filters. Both sights are hinged.
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Object Details
| ID: | ACO0055 |
|---|---|
| Type: | Azimuth Circle |
| Display location: | Not on display |
| Creator: | Gilbert & Sons |
| Date made: | circa 1842 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 50 mm; Diameter: 230 mm |
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