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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. The 11 scales on the back include sines, tangents and chords.
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Object Details
| ID: | NAV0110 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Gunter scale |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | circa 1730 |
| Credit: | National Maritime Museum, Greenwich, London, Caird Collection |
| Measurements: | Overall: 4 mm x 605 mm x 45 mm |