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Backstaff
The backstaff is made from a lignum vitae frame with boxwood arcs and a boxwood inlaid plate in the main strut, brass rivets, and no vanes. Decorative fleurs-de-lis and stars are stamped on both arcs.
The transversal scale on the thirty degree arc is from 0° to 25° by 5 arcminutes and reads to 1 arcminute. The graduation on the sixty degree arc is from 0° to 65° by 1°.
The transversal scale on the thirty degree arc is from 0° to 25° by 5 arcminutes and reads to 1 arcminute. The graduation on the sixty degree arc is from 0° to 65° by 1°.
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Object Details
| ID: | NAV0042 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Backstaff |
| Display location: | Not on display |
| Creator: | Garner, Will |
| Date made: | 1737 |
| People: | White, Thomas |
| Credit: | National Maritime Museum, Greenwich, London |
| Measurements: | Overall: 15 mm x 633 mm x 360 mm |
| Parts: | Backstaff |