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Parallel rule
This ivory with brass hinges parallel rule would have been essential for working with navigational charts, particularly for calculating the bearing and direction of the ship’s course.
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Object Details
| ID: | NAV0613 |
|---|---|
| Type: | Parallel rule |
| Display location: | Not on display |
| Creator: | Crichton |
| Date made: | circa 1830 |
| Exhibition: | North-West Passage |
| Credit: | National Maritime Museum, Greenwich, London, Rev. George Fisher Collection |
| Measurements: | Overall: 3 mm x 152 mm x 36 mm |
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