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- The History of the Sextant Transcript of a talk given at the Science Museum of The University of Coimbra. Includes photos of ancient devices.
- Secrets of Ancient Navigation An overview from the PBS show "The Search for Longitude".
- The History of the Sextant The evolution from the earliest instruments to the sophisticated devices used today described and illustrated.
- Understanding How Thompson Navigated About David Thompson's exploration of western Canada and the northwestern United States from 1790 to 1812, using a sextant and compass. From the Northwest Journal.
- Evolution of the Sextant Illustrated article including details about dating. Links to antique instruments offered for sale.
- Escape from Antarctica Recreates the navigation Ernest Shackleton's crew used on their voyage seeking rescue.
- Longitude at Sea Describes 17th and 18th century use of eclipses of Jupiter's moons to identify position.