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Gunter scale
This wooden rule is known as a Gunter scale or Gunter rule and has scales on each face to help with navigational calculations. The scales on the front include one in inches and diagonal scales that allow a pair of dividers to be set to an exact length. In addition, there is a fleur-de-lys motif at each end of the face. The 17 scales on the back include sines, tangents, versines and chords.
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Object Details
| ID: | NAV0109 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Gunter scale |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | circa 1825 |
| Credit: | National Maritime Museum, Greenwich, London, Caird Collection |
| Measurements: | Overall: 5 mm x 304 mm x 47 mm |