In the days before GPS, the accuracy of a ship’s chronometer might be a matter of life and death. Navigators used them to determine longitude by measuring the local time via a sextant and a star map, ...

Let’s get one thing out of the way: a chronometer is different than a chronograph, though one can also be the other. We’ve heard the terms confused one too many times, and while we’ll forgive past ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This instrument is a specialized ...

Off the coast of Montauk, in the Long Island Sound, at the bottom of Peconic Bay and in other waters around the world, the remains of multiple ships lost at sea during the 1700’s and 1800’s are a ...

Click to open image viewer. CC0 Usage Conditions ApplyClick for more information. In the 19th century, portable marine timekeepers called chronometers became indispensable instruments for determining ...

In the early days of sailing, it was extremely challenging for ships to determine their position at sea once they lost sight of land. Their navigation methods didn’t account for environmental factors ...

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